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, 2022-2023 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 request->n_channels = n_channels;
87 if (wdev->conn->params.channel) {
88 enum nl80211_band band = wdev->conn->params.channel->band;
89 struct ieee80211_supported_band *sband =
90 wdev->wiphy->bands[band];
91
92 if (!sband) {
93 kfree(request);
94 return -EINVAL;
95 }
96 request->channels[0] = wdev->conn->params.channel;
97 request->rates[band] = (1 << sband->n_bitrates) - 1;
98 } else {
99 int i = 0, j;
100 enum nl80211_band band;
101 struct ieee80211_supported_band *bands;
102 struct ieee80211_channel *channel;
103
104 for (band = 0; band < NUM_NL80211_BANDS; band++) {
105 bands = wdev->wiphy->bands[band];
106 if (!bands)
107 continue;
108 for (j = 0; j < bands->n_channels; j++) {
109 channel = &bands->channels[j];
110 if (channel->flags & IEEE80211_CHAN_DISABLED)
111 continue;
112 request->channels[i++] = channel;
113 }
114 request->rates[band] = (1 << bands->n_bitrates) - 1;
115 }
116 n_channels = i;
117 }
118 request->n_channels = n_channels;
119 request->ssids = (void *)request +
120 struct_size(request, channels, n_channels);
121 request->n_ssids = 1;
122
123 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
124 wdev->conn->params.ssid_len);
125 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
126
127 eth_broadcast_addr(request->bssid);
128
129 request->wdev = wdev;
130 request->wiphy = &rdev->wiphy;
131 request->scan_start = jiffies;
132
133 rdev->scan_req = request;
134
135 err = rdev_scan(rdev, request);
136 if (!err) {
137 wdev->conn->state = CFG80211_CONN_SCANNING;
138 nl80211_send_scan_start(rdev, wdev);
139 dev_hold(wdev->netdev);
140 } else {
141 rdev->scan_req = NULL;
142 kfree(request);
143 }
144 return err;
145 }
146
cfg80211_conn_do_work(struct wireless_dev * wdev,enum nl80211_timeout_reason * treason)147 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
148 enum nl80211_timeout_reason *treason)
149 {
150 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
151 struct cfg80211_connect_params *params;
152 struct cfg80211_auth_request auth_req = {};
153 struct cfg80211_assoc_request req = {};
154 int err;
155
156 ASSERT_WDEV_LOCK(wdev);
157
158 if (!wdev->conn)
159 return 0;
160
161 params = &wdev->conn->params;
162
163 switch (wdev->conn->state) {
164 case CFG80211_CONN_SCANNING:
165 /* didn't find it during scan ... */
166 return -ENOENT;
167 case CFG80211_CONN_SCAN_AGAIN:
168 return cfg80211_conn_scan(wdev);
169 case CFG80211_CONN_AUTHENTICATE_NEXT:
170 if (WARN_ON(!rdev->ops->auth))
171 return -EOPNOTSUPP;
172 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
173 auth_req.key = params->key;
174 auth_req.key_len = params->key_len;
175 auth_req.key_idx = params->key_idx;
176 auth_req.auth_type = params->auth_type;
177 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
178 params->bssid,
179 params->ssid, params->ssid_len,
180 IEEE80211_BSS_TYPE_ESS,
181 IEEE80211_PRIVACY_ANY);
182 auth_req.link_id = -1;
183 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
184 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
185 return err;
186 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
187 *treason = NL80211_TIMEOUT_AUTH;
188 return -ENOTCONN;
189 case CFG80211_CONN_ASSOCIATE_NEXT:
190 if (WARN_ON(!rdev->ops->assoc))
191 return -EOPNOTSUPP;
192 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
193 if (wdev->conn->prev_bssid_valid)
194 req.prev_bssid = wdev->conn->prev_bssid;
195 req.ie = params->ie;
196 req.ie_len = params->ie_len;
197 req.use_mfp = params->mfp != NL80211_MFP_NO;
198 req.crypto = params->crypto;
199 req.flags = params->flags;
200 req.ht_capa = params->ht_capa;
201 req.ht_capa_mask = params->ht_capa_mask;
202 req.vht_capa = params->vht_capa;
203 req.vht_capa_mask = params->vht_capa_mask;
204 req.link_id = -1;
205
206 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
207 params->bssid,
208 params->ssid, params->ssid_len,
209 IEEE80211_BSS_TYPE_ESS,
210 IEEE80211_PRIVACY_ANY);
211 if (!req.bss) {
212 err = -ENOENT;
213 } else {
214 err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req);
215 cfg80211_put_bss(&rdev->wiphy, req.bss);
216 }
217
218 if (err)
219 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
220 NULL, 0,
221 WLAN_REASON_DEAUTH_LEAVING,
222 false);
223 return err;
224 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
225 *treason = NL80211_TIMEOUT_ASSOC;
226 fallthrough;
227 case CFG80211_CONN_ASSOC_FAILED:
228 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
229 NULL, 0,
230 WLAN_REASON_DEAUTH_LEAVING, false);
231 return -ENOTCONN;
232 case CFG80211_CONN_DEAUTH:
233 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
234 NULL, 0,
235 WLAN_REASON_DEAUTH_LEAVING, false);
236 fallthrough;
237 case CFG80211_CONN_ABANDON:
238 /* free directly, disconnected event already sent */
239 cfg80211_sme_free(wdev);
240 return 0;
241 default:
242 return 0;
243 }
244 }
245
cfg80211_conn_work(struct work_struct * work)246 void cfg80211_conn_work(struct work_struct *work)
247 {
248 struct cfg80211_registered_device *rdev =
249 container_of(work, struct cfg80211_registered_device, conn_work);
250 struct wireless_dev *wdev;
251 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
252 enum nl80211_timeout_reason treason;
253
254 wiphy_lock(&rdev->wiphy);
255
256 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
257 if (!wdev->netdev)
258 continue;
259
260 wdev_lock(wdev);
261 if (!netif_running(wdev->netdev)) {
262 wdev_unlock(wdev);
263 continue;
264 }
265 if (!wdev->conn ||
266 wdev->conn->state == CFG80211_CONN_CONNECTED) {
267 wdev_unlock(wdev);
268 continue;
269 }
270 if (wdev->conn->params.bssid) {
271 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
272 bssid = bssid_buf;
273 }
274 treason = NL80211_TIMEOUT_UNSPECIFIED;
275 if (cfg80211_conn_do_work(wdev, &treason)) {
276 struct cfg80211_connect_resp_params cr;
277
278 memset(&cr, 0, sizeof(cr));
279 cr.status = -1;
280 cr.links[0].bssid = bssid;
281 cr.timeout_reason = treason;
282 __cfg80211_connect_result(wdev->netdev, &cr, false);
283 }
284 wdev_unlock(wdev);
285 }
286
287 wiphy_unlock(&rdev->wiphy);
288 }
289
cfg80211_step_auth_next(struct cfg80211_conn * conn,struct cfg80211_bss * bss)290 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
291 struct cfg80211_bss *bss)
292 {
293 memcpy(conn->bssid, bss->bssid, ETH_ALEN);
294 conn->params.bssid = conn->bssid;
295 conn->params.channel = bss->channel;
296 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
297 }
298
299 /* Returned bss is reference counted and must be cleaned up appropriately. */
cfg80211_get_conn_bss(struct wireless_dev * wdev)300 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
301 {
302 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
303 struct cfg80211_bss *bss;
304
305 ASSERT_WDEV_LOCK(wdev);
306
307 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
308 wdev->conn->params.bssid,
309 wdev->conn->params.ssid,
310 wdev->conn->params.ssid_len,
311 wdev->conn_bss_type,
312 IEEE80211_PRIVACY(wdev->conn->params.privacy));
313 if (!bss)
314 return NULL;
315
316 cfg80211_step_auth_next(wdev->conn, bss);
317 schedule_work(&rdev->conn_work);
318
319 return bss;
320 }
321
__cfg80211_sme_scan_done(struct net_device * dev)322 static void __cfg80211_sme_scan_done(struct net_device *dev)
323 {
324 struct wireless_dev *wdev = dev->ieee80211_ptr;
325 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
326 struct cfg80211_bss *bss;
327
328 ASSERT_WDEV_LOCK(wdev);
329
330 if (!wdev->conn)
331 return;
332
333 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
334 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
335 return;
336
337 bss = cfg80211_get_conn_bss(wdev);
338 if (bss)
339 cfg80211_put_bss(&rdev->wiphy, bss);
340 else
341 schedule_work(&rdev->conn_work);
342 }
343
cfg80211_sme_scan_done(struct net_device * dev)344 void cfg80211_sme_scan_done(struct net_device *dev)
345 {
346 struct wireless_dev *wdev = dev->ieee80211_ptr;
347
348 wdev_lock(wdev);
349 __cfg80211_sme_scan_done(dev);
350 wdev_unlock(wdev);
351 }
352
cfg80211_sme_rx_auth(struct wireless_dev * wdev,const u8 * buf,size_t len)353 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
354 {
355 struct wiphy *wiphy = wdev->wiphy;
356 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
357 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
358 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
359
360 ASSERT_WDEV_LOCK(wdev);
361
362 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
363 return;
364
365 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
366 wdev->conn->auto_auth &&
367 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
368 /* select automatically between only open, shared, leap */
369 switch (wdev->conn->params.auth_type) {
370 case NL80211_AUTHTYPE_OPEN_SYSTEM:
371 if (wdev->connect_keys)
372 wdev->conn->params.auth_type =
373 NL80211_AUTHTYPE_SHARED_KEY;
374 else
375 wdev->conn->params.auth_type =
376 NL80211_AUTHTYPE_NETWORK_EAP;
377 break;
378 case NL80211_AUTHTYPE_SHARED_KEY:
379 wdev->conn->params.auth_type =
380 NL80211_AUTHTYPE_NETWORK_EAP;
381 break;
382 default:
383 /* huh? */
384 wdev->conn->params.auth_type =
385 NL80211_AUTHTYPE_OPEN_SYSTEM;
386 break;
387 }
388 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
389 schedule_work(&rdev->conn_work);
390 } else if (status_code != WLAN_STATUS_SUCCESS) {
391 struct cfg80211_connect_resp_params cr;
392
393 memset(&cr, 0, sizeof(cr));
394 cr.status = status_code;
395 cr.links[0].bssid = mgmt->bssid;
396 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
397 __cfg80211_connect_result(wdev->netdev, &cr, false);
398 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
399 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
400 schedule_work(&rdev->conn_work);
401 }
402 }
403
cfg80211_sme_rx_assoc_resp(struct wireless_dev * wdev,u16 status)404 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
405 {
406 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
407
408 if (!wdev->conn)
409 return false;
410
411 if (status == WLAN_STATUS_SUCCESS) {
412 wdev->conn->state = CFG80211_CONN_CONNECTED;
413 return false;
414 }
415
416 if (wdev->conn->prev_bssid_valid) {
417 /*
418 * Some stupid APs don't accept reassoc, so we
419 * need to fall back to trying regular assoc;
420 * return true so no event is sent to userspace.
421 */
422 wdev->conn->prev_bssid_valid = false;
423 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
424 schedule_work(&rdev->conn_work);
425 return true;
426 }
427
428 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
429 schedule_work(&rdev->conn_work);
430 return false;
431 }
432
cfg80211_sme_deauth(struct wireless_dev * wdev)433 void cfg80211_sme_deauth(struct wireless_dev *wdev)
434 {
435 cfg80211_sme_free(wdev);
436 }
437
cfg80211_sme_auth_timeout(struct wireless_dev * wdev)438 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
439 {
440 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
441
442 if (!wdev->conn)
443 return;
444
445 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
446 schedule_work(&rdev->conn_work);
447 }
448
cfg80211_sme_disassoc(struct wireless_dev * wdev)449 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
450 {
451 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
452
453 if (!wdev->conn)
454 return;
455
456 wdev->conn->state = CFG80211_CONN_DEAUTH;
457 schedule_work(&rdev->conn_work);
458 }
459
cfg80211_sme_assoc_timeout(struct wireless_dev * wdev)460 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
461 {
462 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
463
464 if (!wdev->conn)
465 return;
466
467 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
468 schedule_work(&rdev->conn_work);
469 }
470
cfg80211_sme_abandon_assoc(struct wireless_dev * wdev)471 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
472 {
473 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
474
475 if (!wdev->conn)
476 return;
477
478 wdev->conn->state = CFG80211_CONN_ABANDON;
479 schedule_work(&rdev->conn_work);
480 }
481
cfg80211_wdev_release_bsses(struct wireless_dev * wdev)482 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
483 {
484 unsigned int link;
485
486 for_each_valid_link(wdev, link) {
487 if (!wdev->links[link].client.current_bss)
488 continue;
489 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
490 cfg80211_put_bss(wdev->wiphy,
491 &wdev->links[link].client.current_bss->pub);
492 wdev->links[link].client.current_bss = NULL;
493 }
494 }
495
cfg80211_wdev_release_link_bsses(struct wireless_dev * wdev,u16 link_mask)496 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
497 {
498 unsigned int link;
499
500 for_each_valid_link(wdev, link) {
501 if (!wdev->links[link].client.current_bss ||
502 !(link_mask & BIT(link)))
503 continue;
504 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
505 cfg80211_put_bss(wdev->wiphy,
506 &wdev->links[link].client.current_bss->pub);
507 wdev->links[link].client.current_bss = NULL;
508 }
509 }
510
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)511 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
512 const u8 *ies, size_t ies_len,
513 const u8 **out_ies, size_t *out_ies_len)
514 {
515 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
516 u8 *buf;
517 size_t offs;
518
519 if (!rdev->wiphy.extended_capabilities_len ||
520 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
521 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
522 if (!*out_ies)
523 return -ENOMEM;
524 *out_ies_len = ies_len;
525 return 0;
526 }
527
528 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
529 GFP_KERNEL);
530 if (!buf)
531 return -ENOMEM;
532
533 if (ies_len) {
534 static const u8 before_extcapa[] = {
535 /* not listing IEs expected to be created by driver */
536 WLAN_EID_RSN,
537 WLAN_EID_QOS_CAPA,
538 WLAN_EID_RRM_ENABLED_CAPABILITIES,
539 WLAN_EID_MOBILITY_DOMAIN,
540 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
541 WLAN_EID_BSS_COEX_2040,
542 };
543
544 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
545 ARRAY_SIZE(before_extcapa), 0);
546 memcpy(buf, ies, offs);
547 /* leave a whole for extended capabilities IE */
548 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
549 ies + offs, ies_len - offs);
550 } else {
551 offs = 0;
552 }
553
554 /* place extended capabilities IE (with only driver capabilities) */
555 buf[offs] = WLAN_EID_EXT_CAPABILITY;
556 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
557 memcpy(buf + offs + 2,
558 rdev->wiphy.extended_capabilities,
559 rdev->wiphy.extended_capabilities_len);
560
561 *out_ies = buf;
562 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
563
564 return 0;
565 }
566
cfg80211_sme_connect(struct wireless_dev * wdev,struct cfg80211_connect_params * connect,const u8 * prev_bssid)567 static int cfg80211_sme_connect(struct wireless_dev *wdev,
568 struct cfg80211_connect_params *connect,
569 const u8 *prev_bssid)
570 {
571 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
572 struct cfg80211_bss *bss;
573 int err;
574
575 if (!rdev->ops->auth || !rdev->ops->assoc)
576 return -EOPNOTSUPP;
577
578 cfg80211_wdev_release_bsses(wdev);
579
580 if (wdev->connected) {
581 cfg80211_sme_free(wdev);
582 wdev->connected = false;
583 }
584
585 if (wdev->conn)
586 return -EINPROGRESS;
587
588 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
589 if (!wdev->conn)
590 return -ENOMEM;
591
592 /*
593 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
594 */
595 memcpy(&wdev->conn->params, connect, sizeof(*connect));
596 if (connect->bssid) {
597 wdev->conn->params.bssid = wdev->conn->bssid;
598 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
599 }
600
601 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
602 &wdev->conn->ie,
603 &wdev->conn->params.ie_len)) {
604 kfree(wdev->conn);
605 wdev->conn = NULL;
606 return -ENOMEM;
607 }
608 wdev->conn->params.ie = wdev->conn->ie;
609
610 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
611 wdev->conn->auto_auth = true;
612 /* start with open system ... should mostly work */
613 wdev->conn->params.auth_type =
614 NL80211_AUTHTYPE_OPEN_SYSTEM;
615 } else {
616 wdev->conn->auto_auth = false;
617 }
618
619 wdev->conn->params.ssid = wdev->u.client.ssid;
620 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
621
622 /* see if we have the bss already */
623 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
624 wdev->conn->params.bssid,
625 wdev->conn->params.ssid,
626 wdev->conn->params.ssid_len,
627 wdev->conn_bss_type,
628 IEEE80211_PRIVACY(wdev->conn->params.privacy));
629
630 if (prev_bssid) {
631 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
632 wdev->conn->prev_bssid_valid = true;
633 }
634
635 /* we're good if we have a matching bss struct */
636 if (bss) {
637 enum nl80211_timeout_reason treason;
638
639 cfg80211_step_auth_next(wdev->conn, bss);
640 err = cfg80211_conn_do_work(wdev, &treason);
641 cfg80211_put_bss(wdev->wiphy, bss);
642 } else {
643 /* otherwise we'll need to scan for the AP first */
644 err = cfg80211_conn_scan(wdev);
645
646 /*
647 * If we can't scan right now, then we need to scan again
648 * after the current scan finished, since the parameters
649 * changed (unless we find a good AP anyway).
650 */
651 if (err == -EBUSY) {
652 err = 0;
653 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
654 }
655 }
656
657 if (err)
658 cfg80211_sme_free(wdev);
659
660 return err;
661 }
662
cfg80211_sme_disconnect(struct wireless_dev * wdev,u16 reason)663 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
664 {
665 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
666 int err;
667
668 if (!wdev->conn)
669 return 0;
670
671 if (!rdev->ops->deauth)
672 return -EOPNOTSUPP;
673
674 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
675 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
676 err = 0;
677 goto out;
678 }
679
680 /* wdev->conn->params.bssid must be set if > SCANNING */
681 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
682 wdev->conn->params.bssid,
683 NULL, 0, reason, false);
684 out:
685 cfg80211_sme_free(wdev);
686 return err;
687 }
688
689 /*
690 * code shared for in-device and software SME
691 */
692
cfg80211_is_all_idle(void)693 static bool cfg80211_is_all_idle(void)
694 {
695 struct cfg80211_registered_device *rdev;
696 struct wireless_dev *wdev;
697 bool is_all_idle = true;
698
699 /*
700 * All devices must be idle as otherwise if you are actively
701 * scanning some new beacon hints could be learned and would
702 * count as new regulatory hints.
703 * Also if there is any other active beaconing interface we
704 * need not issue a disconnect hint and reset any info such
705 * as chan dfs state, etc.
706 */
707 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
708 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
709 wdev_lock(wdev);
710 if (wdev->conn || wdev->connected ||
711 cfg80211_beaconing_iface_active(wdev))
712 is_all_idle = false;
713 wdev_unlock(wdev);
714 }
715 }
716
717 return is_all_idle;
718 }
719
disconnect_work(struct work_struct * work)720 static void disconnect_work(struct work_struct *work)
721 {
722 rtnl_lock();
723 if (cfg80211_is_all_idle())
724 regulatory_hint_disconnect();
725 rtnl_unlock();
726 }
727
728 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
729
730 static void
cfg80211_connect_result_release_bsses(struct wireless_dev * wdev,struct cfg80211_connect_resp_params * cr)731 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
732 struct cfg80211_connect_resp_params *cr)
733 {
734 unsigned int link;
735
736 for_each_valid_link(cr, link) {
737 if (!cr->links[link].bss)
738 continue;
739 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
740 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
741 }
742 }
743
744 /*
745 * API calls for drivers implementing connect/disconnect and
746 * SME event handling
747 */
748
749 /* This method must consume bss one way or another */
__cfg80211_connect_result(struct net_device * dev,struct cfg80211_connect_resp_params * cr,bool wextev)750 void __cfg80211_connect_result(struct net_device *dev,
751 struct cfg80211_connect_resp_params *cr,
752 bool wextev)
753 {
754 struct wireless_dev *wdev = dev->ieee80211_ptr;
755 const struct element *country_elem = NULL;
756 const struct element *ssid;
757 const u8 *country_data;
758 u8 country_datalen;
759 #ifdef CONFIG_CFG80211_WEXT
760 union iwreq_data wrqu;
761 #endif
762 unsigned int link;
763 const u8 *connected_addr;
764 bool bss_not_found = false;
765
766 ASSERT_WDEV_LOCK(wdev);
767
768 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
769 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
770 goto out;
771
772 if (cr->valid_links) {
773 if (WARN_ON(!cr->ap_mld_addr))
774 goto out;
775
776 for_each_valid_link(cr, link) {
777 if (WARN_ON(!cr->links[link].addr))
778 goto out;
779 }
780
781 if (WARN_ON(wdev->connect_keys))
782 goto out;
783 }
784
785 wdev->unprot_beacon_reported = 0;
786 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
787 GFP_KERNEL);
788 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
789
790 #ifdef CONFIG_CFG80211_WEXT
791 if (wextev && !cr->valid_links) {
792 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
793 memset(&wrqu, 0, sizeof(wrqu));
794 wrqu.data.length = cr->req_ie_len;
795 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
796 cr->req_ie);
797 }
798
799 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
800 memset(&wrqu, 0, sizeof(wrqu));
801 wrqu.data.length = cr->resp_ie_len;
802 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
803 cr->resp_ie);
804 }
805
806 memset(&wrqu, 0, sizeof(wrqu));
807 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
808 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
809 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
810 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
811 wdev->wext.prev_bssid_valid = true;
812 }
813 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
814 }
815 #endif
816
817 if (cr->status == WLAN_STATUS_SUCCESS) {
818 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
819 for_each_valid_link(cr, link) {
820 if (WARN_ON_ONCE(!cr->links[link].bss))
821 break;
822 }
823 }
824
825 for_each_valid_link(cr, link) {
826 /* don't do extra lookups for failures */
827 if (cr->links[link].status != WLAN_STATUS_SUCCESS)
828 continue;
829
830 if (cr->links[link].bss)
831 continue;
832
833 cr->links[link].bss =
834 cfg80211_get_bss(wdev->wiphy, NULL,
835 cr->links[link].bssid,
836 wdev->u.client.ssid,
837 wdev->u.client.ssid_len,
838 wdev->conn_bss_type,
839 IEEE80211_PRIVACY_ANY);
840 if (!cr->links[link].bss) {
841 bss_not_found = true;
842 break;
843 }
844 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
845 }
846 }
847
848 cfg80211_wdev_release_bsses(wdev);
849
850 if (cr->status != WLAN_STATUS_SUCCESS) {
851 kfree_sensitive(wdev->connect_keys);
852 wdev->connect_keys = NULL;
853 wdev->u.client.ssid_len = 0;
854 wdev->conn_owner_nlportid = 0;
855 cfg80211_connect_result_release_bsses(wdev, cr);
856 cfg80211_sme_free(wdev);
857 return;
858 }
859
860 if (WARN_ON(bss_not_found)) {
861 cfg80211_connect_result_release_bsses(wdev, cr);
862 return;
863 }
864
865 memset(wdev->links, 0, sizeof(wdev->links));
866 for_each_valid_link(cr, link) {
867 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
868 continue;
869 cr->valid_links &= ~BIT(link);
870 /* don't require bss pointer for failed links */
871 if (!cr->links[link].bss)
872 continue;
873 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
874 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
875 }
876 wdev->valid_links = cr->valid_links;
877 for_each_valid_link(cr, link)
878 wdev->links[link].client.current_bss =
879 bss_from_pub(cr->links[link].bss);
880 wdev->connected = true;
881 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
882 if (cr->valid_links) {
883 for_each_valid_link(cr, link)
884 memcpy(wdev->links[link].addr, cr->links[link].addr,
885 ETH_ALEN);
886 }
887
888 cfg80211_upload_connect_keys(wdev);
889
890 rcu_read_lock();
891 for_each_valid_link(cr, link) {
892 country_elem =
893 ieee80211_bss_get_elem(cr->links[link].bss,
894 WLAN_EID_COUNTRY);
895 if (country_elem)
896 break;
897 }
898 if (!country_elem) {
899 rcu_read_unlock();
900 return;
901 }
902
903 country_datalen = country_elem->datalen;
904 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
905 rcu_read_unlock();
906
907 if (!country_data)
908 return;
909
910 regulatory_hint_country_ie(wdev->wiphy,
911 cr->links[link].bss->channel->band,
912 country_data, country_datalen);
913 kfree(country_data);
914
915 if (!wdev->u.client.ssid_len) {
916 rcu_read_lock();
917 for_each_valid_link(cr, link) {
918 ssid = ieee80211_bss_get_elem(cr->links[link].bss,
919 WLAN_EID_SSID);
920
921 if (!ssid || !ssid->datalen)
922 continue;
923
924 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
925 wdev->u.client.ssid_len = ssid->datalen;
926 break;
927 }
928 rcu_read_unlock();
929 }
930
931 return;
932 out:
933 for_each_valid_link(cr, link)
934 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
935 }
936
cfg80211_update_link_bss(struct wireless_dev * wdev,struct cfg80211_bss ** bss)937 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
938 struct cfg80211_bss **bss)
939 {
940 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
941 struct cfg80211_internal_bss *ibss;
942
943 if (!*bss)
944 return;
945
946 ibss = bss_from_pub(*bss);
947 if (list_empty(&ibss->list)) {
948 struct cfg80211_bss *found = NULL, *tmp = *bss;
949
950 found = cfg80211_get_bss(wdev->wiphy, NULL,
951 (*bss)->bssid,
952 wdev->u.client.ssid,
953 wdev->u.client.ssid_len,
954 wdev->conn_bss_type,
955 IEEE80211_PRIVACY_ANY);
956 if (found) {
957 /* The same BSS is already updated so use it
958 * instead, as it has latest info.
959 */
960 *bss = found;
961 } else {
962 /* Update with BSS provided by driver, it will
963 * be freshly added and ref cnted, we can free
964 * the old one.
965 *
966 * signal_valid can be false, as we are not
967 * expecting the BSS to be found.
968 *
969 * keep the old timestamp to avoid confusion
970 */
971 cfg80211_bss_update(rdev, ibss, false,
972 ibss->ts);
973 }
974
975 cfg80211_put_bss(wdev->wiphy, tmp);
976 }
977 }
978
979 /* Consumes bss object(s) one way or another */
cfg80211_connect_done(struct net_device * dev,struct cfg80211_connect_resp_params * params,gfp_t gfp)980 void cfg80211_connect_done(struct net_device *dev,
981 struct cfg80211_connect_resp_params *params,
982 gfp_t gfp)
983 {
984 struct wireless_dev *wdev = dev->ieee80211_ptr;
985 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
986 struct cfg80211_event *ev;
987 unsigned long flags;
988 u8 *next;
989 size_t link_info_size = 0;
990 unsigned int link;
991
992 for_each_valid_link(params, link) {
993 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss);
994 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
995 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
996 }
997
998 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
999 params->req_ie_len + params->resp_ie_len +
1000 params->fils.kek_len + params->fils.pmk_len +
1001 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
1002 gfp);
1003
1004 if (!ev) {
1005 for_each_valid_link(params, link)
1006 cfg80211_put_bss(wdev->wiphy,
1007 params->links[link].bss);
1008 return;
1009 }
1010
1011 ev->type = EVENT_CONNECT_RESULT;
1012 next = ((u8 *)ev) + sizeof(*ev);
1013 if (params->ap_mld_addr) {
1014 ev->cr.ap_mld_addr = next;
1015 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1016 ETH_ALEN);
1017 next += ETH_ALEN;
1018 }
1019 if (params->req_ie_len) {
1020 ev->cr.req_ie = next;
1021 ev->cr.req_ie_len = params->req_ie_len;
1022 memcpy((void *)ev->cr.req_ie, params->req_ie,
1023 params->req_ie_len);
1024 next += params->req_ie_len;
1025 }
1026 if (params->resp_ie_len) {
1027 ev->cr.resp_ie = next;
1028 ev->cr.resp_ie_len = params->resp_ie_len;
1029 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1030 params->resp_ie_len);
1031 next += params->resp_ie_len;
1032 }
1033 if (params->fils.kek_len) {
1034 ev->cr.fils.kek = next;
1035 ev->cr.fils.kek_len = params->fils.kek_len;
1036 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1037 params->fils.kek_len);
1038 next += params->fils.kek_len;
1039 }
1040 if (params->fils.pmk_len) {
1041 ev->cr.fils.pmk = next;
1042 ev->cr.fils.pmk_len = params->fils.pmk_len;
1043 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1044 params->fils.pmk_len);
1045 next += params->fils.pmk_len;
1046 }
1047 if (params->fils.pmkid) {
1048 ev->cr.fils.pmkid = next;
1049 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1050 WLAN_PMKID_LEN);
1051 next += WLAN_PMKID_LEN;
1052 }
1053 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1054 if (params->fils.update_erp_next_seq_num)
1055 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1056 ev->cr.valid_links = params->valid_links;
1057 for_each_valid_link(params, link) {
1058 if (params->links[link].bss)
1059 cfg80211_hold_bss(
1060 bss_from_pub(params->links[link].bss));
1061 ev->cr.links[link].bss = params->links[link].bss;
1062 ev->cr.links[link].status = params->links[link].status;
1063
1064 if (params->links[link].addr) {
1065 ev->cr.links[link].addr = next;
1066 memcpy((void *)ev->cr.links[link].addr,
1067 params->links[link].addr,
1068 ETH_ALEN);
1069 next += ETH_ALEN;
1070 }
1071 if (params->links[link].bssid) {
1072 ev->cr.links[link].bssid = next;
1073 memcpy((void *)ev->cr.links[link].bssid,
1074 params->links[link].bssid,
1075 ETH_ALEN);
1076 next += ETH_ALEN;
1077 }
1078 }
1079 ev->cr.status = params->status;
1080 ev->cr.timeout_reason = params->timeout_reason;
1081
1082 spin_lock_irqsave(&wdev->event_lock, flags);
1083 list_add_tail(&ev->list, &wdev->event_list);
1084 spin_unlock_irqrestore(&wdev->event_lock, flags);
1085 queue_work(cfg80211_wq, &rdev->event_work);
1086 }
1087 EXPORT_SYMBOL(cfg80211_connect_done);
1088
1089 /* Consumes bss object one way or another */
__cfg80211_roamed(struct wireless_dev * wdev,struct cfg80211_roam_info * info)1090 void __cfg80211_roamed(struct wireless_dev *wdev,
1091 struct cfg80211_roam_info *info)
1092 {
1093 #ifdef CONFIG_CFG80211_WEXT
1094 union iwreq_data wrqu;
1095 #endif
1096 unsigned int link;
1097 const u8 *connected_addr;
1098
1099 ASSERT_WDEV_LOCK(wdev);
1100
1101 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1102 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1103 goto out;
1104
1105 if (WARN_ON(!wdev->connected))
1106 goto out;
1107
1108 if (info->valid_links) {
1109 if (WARN_ON(!info->ap_mld_addr))
1110 goto out;
1111
1112 for_each_valid_link(info, link) {
1113 if (WARN_ON(!info->links[link].addr))
1114 goto out;
1115 }
1116 }
1117
1118 cfg80211_wdev_release_bsses(wdev);
1119
1120 for_each_valid_link(info, link) {
1121 if (WARN_ON(!info->links[link].bss))
1122 goto out;
1123 }
1124
1125 memset(wdev->links, 0, sizeof(wdev->links));
1126 wdev->valid_links = info->valid_links;
1127 for_each_valid_link(info, link) {
1128 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1129 wdev->links[link].client.current_bss =
1130 bss_from_pub(info->links[link].bss);
1131 }
1132
1133 connected_addr = info->valid_links ?
1134 info->ap_mld_addr :
1135 info->links[0].bss->bssid;
1136 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1137 if (info->valid_links) {
1138 for_each_valid_link(info, link)
1139 memcpy(wdev->links[link].addr, info->links[link].addr,
1140 ETH_ALEN);
1141 }
1142 wdev->unprot_beacon_reported = 0;
1143 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1144 wdev->netdev, info, GFP_KERNEL);
1145
1146 #ifdef CONFIG_CFG80211_WEXT
1147 if (!info->valid_links) {
1148 if (info->req_ie) {
1149 memset(&wrqu, 0, sizeof(wrqu));
1150 wrqu.data.length = info->req_ie_len;
1151 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1152 &wrqu, info->req_ie);
1153 }
1154
1155 if (info->resp_ie) {
1156 memset(&wrqu, 0, sizeof(wrqu));
1157 wrqu.data.length = info->resp_ie_len;
1158 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1159 &wrqu, info->resp_ie);
1160 }
1161
1162 memset(&wrqu, 0, sizeof(wrqu));
1163 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1164 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1165 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1166 wdev->wext.prev_bssid_valid = true;
1167 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1168 }
1169 #endif
1170
1171 return;
1172 out:
1173 for_each_valid_link(info, link)
1174 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1175 }
1176
1177 /* Consumes info->links.bss object(s) one way or another */
cfg80211_roamed(struct net_device * dev,struct cfg80211_roam_info * info,gfp_t gfp)1178 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1179 gfp_t gfp)
1180 {
1181 struct wireless_dev *wdev = dev->ieee80211_ptr;
1182 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1183 struct cfg80211_event *ev;
1184 unsigned long flags;
1185 u8 *next;
1186 unsigned int link;
1187 size_t link_info_size = 0;
1188 bool bss_not_found = false;
1189
1190 for_each_valid_link(info, link) {
1191 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1192 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1193
1194 if (info->links[link].bss)
1195 continue;
1196
1197 info->links[link].bss =
1198 cfg80211_get_bss(wdev->wiphy,
1199 info->links[link].channel,
1200 info->links[link].bssid,
1201 wdev->u.client.ssid,
1202 wdev->u.client.ssid_len,
1203 wdev->conn_bss_type,
1204 IEEE80211_PRIVACY_ANY);
1205
1206 if (!info->links[link].bss) {
1207 bss_not_found = true;
1208 break;
1209 }
1210 }
1211
1212 if (WARN_ON(bss_not_found))
1213 goto out;
1214
1215 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1216 info->fils.kek_len + info->fils.pmk_len +
1217 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1218 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1219 if (!ev)
1220 goto out;
1221
1222 ev->type = EVENT_ROAMED;
1223 next = ((u8 *)ev) + sizeof(*ev);
1224 if (info->req_ie_len) {
1225 ev->rm.req_ie = next;
1226 ev->rm.req_ie_len = info->req_ie_len;
1227 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1228 next += info->req_ie_len;
1229 }
1230 if (info->resp_ie_len) {
1231 ev->rm.resp_ie = next;
1232 ev->rm.resp_ie_len = info->resp_ie_len;
1233 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1234 info->resp_ie_len);
1235 next += info->resp_ie_len;
1236 }
1237 if (info->fils.kek_len) {
1238 ev->rm.fils.kek = next;
1239 ev->rm.fils.kek_len = info->fils.kek_len;
1240 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1241 info->fils.kek_len);
1242 next += info->fils.kek_len;
1243 }
1244 if (info->fils.pmk_len) {
1245 ev->rm.fils.pmk = next;
1246 ev->rm.fils.pmk_len = info->fils.pmk_len;
1247 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1248 info->fils.pmk_len);
1249 next += info->fils.pmk_len;
1250 }
1251 if (info->fils.pmkid) {
1252 ev->rm.fils.pmkid = next;
1253 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1254 WLAN_PMKID_LEN);
1255 next += WLAN_PMKID_LEN;
1256 }
1257 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1258 if (info->fils.update_erp_next_seq_num)
1259 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1260 if (info->ap_mld_addr) {
1261 ev->rm.ap_mld_addr = next;
1262 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1263 ETH_ALEN);
1264 next += ETH_ALEN;
1265 }
1266 ev->rm.valid_links = info->valid_links;
1267 for_each_valid_link(info, link) {
1268 ev->rm.links[link].bss = info->links[link].bss;
1269
1270 if (info->links[link].addr) {
1271 ev->rm.links[link].addr = next;
1272 memcpy((void *)ev->rm.links[link].addr,
1273 info->links[link].addr,
1274 ETH_ALEN);
1275 next += ETH_ALEN;
1276 }
1277
1278 if (info->links[link].bssid) {
1279 ev->rm.links[link].bssid = next;
1280 memcpy((void *)ev->rm.links[link].bssid,
1281 info->links[link].bssid,
1282 ETH_ALEN);
1283 next += ETH_ALEN;
1284 }
1285 }
1286
1287 spin_lock_irqsave(&wdev->event_lock, flags);
1288 list_add_tail(&ev->list, &wdev->event_list);
1289 spin_unlock_irqrestore(&wdev->event_lock, flags);
1290 queue_work(cfg80211_wq, &rdev->event_work);
1291
1292 return;
1293 out:
1294 for_each_valid_link(info, link)
1295 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1296
1297 }
1298 EXPORT_SYMBOL(cfg80211_roamed);
1299
__cfg80211_port_authorized(struct wireless_dev * wdev,const u8 * bssid,const u8 * td_bitmap,u8 td_bitmap_len)1300 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid,
1301 const u8 *td_bitmap, u8 td_bitmap_len)
1302 {
1303 ASSERT_WDEV_LOCK(wdev);
1304
1305 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1306 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1307 return;
1308
1309 if (WARN_ON(!wdev->connected) ||
1310 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid)))
1311 return;
1312
1313 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1314 bssid, td_bitmap, td_bitmap_len);
1315 }
1316
cfg80211_port_authorized(struct net_device * dev,const u8 * bssid,const u8 * td_bitmap,u8 td_bitmap_len,gfp_t gfp)1317 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1318 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1319 {
1320 struct wireless_dev *wdev = dev->ieee80211_ptr;
1321 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1322 struct cfg80211_event *ev;
1323 unsigned long flags;
1324
1325 if (WARN_ON(!bssid))
1326 return;
1327
1328 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1329 if (!ev)
1330 return;
1331
1332 ev->type = EVENT_PORT_AUTHORIZED;
1333 memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1334 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1335 ev->pa.td_bitmap_len = td_bitmap_len;
1336 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1337
1338 /*
1339 * Use the wdev event list so that if there are pending
1340 * connected/roamed events, they will be reported first.
1341 */
1342 spin_lock_irqsave(&wdev->event_lock, flags);
1343 list_add_tail(&ev->list, &wdev->event_list);
1344 spin_unlock_irqrestore(&wdev->event_lock, flags);
1345 queue_work(cfg80211_wq, &rdev->event_work);
1346 }
1347 EXPORT_SYMBOL(cfg80211_port_authorized);
1348
__cfg80211_disconnected(struct net_device * dev,const u8 * ie,size_t ie_len,u16 reason,bool from_ap)1349 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1350 size_t ie_len, u16 reason, bool from_ap)
1351 {
1352 struct wireless_dev *wdev = dev->ieee80211_ptr;
1353 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1354 int i;
1355 #ifdef CONFIG_CFG80211_WEXT
1356 union iwreq_data wrqu;
1357 #endif
1358
1359 ASSERT_WDEV_LOCK(wdev);
1360
1361 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1362 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1363 return;
1364
1365 cfg80211_wdev_release_bsses(wdev);
1366 wdev->connected = false;
1367 wdev->u.client.ssid_len = 0;
1368 wdev->conn_owner_nlportid = 0;
1369 kfree_sensitive(wdev->connect_keys);
1370 wdev->connect_keys = NULL;
1371
1372 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1373
1374 /* stop critical protocol if supported */
1375 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1376 rdev->crit_proto_nlportid = 0;
1377 rdev_crit_proto_stop(rdev, wdev);
1378 }
1379
1380 /*
1381 * Delete all the keys ... pairwise keys can't really
1382 * exist any more anyway, but default keys might.
1383 */
1384 if (rdev->ops->del_key) {
1385 int max_key_idx = 5;
1386
1387 if (wiphy_ext_feature_isset(
1388 wdev->wiphy,
1389 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1390 wiphy_ext_feature_isset(
1391 wdev->wiphy,
1392 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1393 max_key_idx = 7;
1394 for (i = 0; i <= max_key_idx; i++)
1395 rdev_del_key(rdev, dev, -1, i, false, NULL);
1396 }
1397
1398 rdev_set_qos_map(rdev, dev, NULL);
1399
1400 #ifdef CONFIG_CFG80211_WEXT
1401 memset(&wrqu, 0, sizeof(wrqu));
1402 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1403 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1404 wdev->wext.connect.ssid_len = 0;
1405 #endif
1406
1407 schedule_work(&cfg80211_disconnect_work);
1408 }
1409
cfg80211_disconnected(struct net_device * dev,u16 reason,const u8 * ie,size_t ie_len,bool locally_generated,gfp_t gfp)1410 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1411 const u8 *ie, size_t ie_len,
1412 bool locally_generated, gfp_t gfp)
1413 {
1414 struct wireless_dev *wdev = dev->ieee80211_ptr;
1415 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1416 struct cfg80211_event *ev;
1417 unsigned long flags;
1418
1419 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1420 if (!ev)
1421 return;
1422
1423 ev->type = EVENT_DISCONNECTED;
1424 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1425 ev->dc.ie_len = ie_len;
1426 memcpy((void *)ev->dc.ie, ie, ie_len);
1427 ev->dc.reason = reason;
1428 ev->dc.locally_generated = locally_generated;
1429
1430 spin_lock_irqsave(&wdev->event_lock, flags);
1431 list_add_tail(&ev->list, &wdev->event_list);
1432 spin_unlock_irqrestore(&wdev->event_lock, flags);
1433 queue_work(cfg80211_wq, &rdev->event_work);
1434 }
1435 EXPORT_SYMBOL(cfg80211_disconnected);
1436
1437 /*
1438 * API calls for nl80211/wext compatibility code
1439 */
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)1440 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1441 struct net_device *dev,
1442 struct cfg80211_connect_params *connect,
1443 struct cfg80211_cached_keys *connkeys,
1444 const u8 *prev_bssid)
1445 {
1446 struct wireless_dev *wdev = dev->ieee80211_ptr;
1447 int err;
1448
1449 ASSERT_WDEV_LOCK(wdev);
1450
1451 /*
1452 * If we have an ssid_len, we're trying to connect or are
1453 * already connected, so reject a new SSID unless it's the
1454 * same (which is the case for re-association.)
1455 */
1456 if (wdev->u.client.ssid_len &&
1457 (wdev->u.client.ssid_len != connect->ssid_len ||
1458 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1459 return -EALREADY;
1460
1461 /*
1462 * If connected, reject (re-)association unless prev_bssid
1463 * matches the current BSSID.
1464 */
1465 if (wdev->connected) {
1466 if (!prev_bssid)
1467 return -EALREADY;
1468 if (!ether_addr_equal(prev_bssid,
1469 wdev->u.client.connected_addr))
1470 return -ENOTCONN;
1471 }
1472
1473 /*
1474 * Reject if we're in the process of connecting with WEP,
1475 * this case isn't very interesting and trying to handle
1476 * it would make the code much more complex.
1477 */
1478 if (wdev->connect_keys)
1479 return -EINPROGRESS;
1480
1481 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1482 rdev->wiphy.ht_capa_mod_mask);
1483 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1484 rdev->wiphy.vht_capa_mod_mask);
1485
1486 if (connkeys && connkeys->def >= 0) {
1487 int idx;
1488 u32 cipher;
1489
1490 idx = connkeys->def;
1491 cipher = connkeys->params[idx].cipher;
1492 /* If given a WEP key we may need it for shared key auth */
1493 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1494 cipher == WLAN_CIPHER_SUITE_WEP104) {
1495 connect->key_idx = idx;
1496 connect->key = connkeys->params[idx].key;
1497 connect->key_len = connkeys->params[idx].key_len;
1498
1499 /*
1500 * If ciphers are not set (e.g. when going through
1501 * iwconfig), we have to set them appropriately here.
1502 */
1503 if (connect->crypto.cipher_group == 0)
1504 connect->crypto.cipher_group = cipher;
1505
1506 if (connect->crypto.n_ciphers_pairwise == 0) {
1507 connect->crypto.n_ciphers_pairwise = 1;
1508 connect->crypto.ciphers_pairwise[0] = cipher;
1509 }
1510 }
1511 } else {
1512 if (WARN_ON(connkeys))
1513 return -EINVAL;
1514
1515 /* connect can point to wdev->wext.connect which
1516 * can hold key data from a previous connection
1517 */
1518 connect->key = NULL;
1519 connect->key_len = 0;
1520 connect->key_idx = 0;
1521 }
1522
1523 wdev->connect_keys = connkeys;
1524 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1525 wdev->u.client.ssid_len = connect->ssid_len;
1526
1527 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1528 IEEE80211_BSS_TYPE_ESS;
1529
1530 if (!rdev->ops->connect)
1531 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1532 else
1533 err = rdev_connect(rdev, dev, connect);
1534
1535 if (err) {
1536 wdev->connect_keys = NULL;
1537 /*
1538 * This could be reassoc getting refused, don't clear
1539 * ssid_len in that case.
1540 */
1541 if (!wdev->connected)
1542 wdev->u.client.ssid_len = 0;
1543 return err;
1544 }
1545
1546 return 0;
1547 }
1548
cfg80211_disconnect(struct cfg80211_registered_device * rdev,struct net_device * dev,u16 reason,bool wextev)1549 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1550 struct net_device *dev, u16 reason, bool wextev)
1551 {
1552 struct wireless_dev *wdev = dev->ieee80211_ptr;
1553 int err = 0;
1554
1555 ASSERT_WDEV_LOCK(wdev);
1556
1557 kfree_sensitive(wdev->connect_keys);
1558 wdev->connect_keys = NULL;
1559
1560 wdev->conn_owner_nlportid = 0;
1561
1562 if (wdev->conn)
1563 err = cfg80211_sme_disconnect(wdev, reason);
1564 else if (!rdev->ops->disconnect)
1565 cfg80211_mlme_down(rdev, dev);
1566 else if (wdev->u.client.ssid_len)
1567 err = rdev_disconnect(rdev, dev, reason);
1568
1569 /*
1570 * Clear ssid_len unless we actually were fully connected,
1571 * in which case cfg80211_disconnected() will take care of
1572 * this later.
1573 */
1574 if (!wdev->connected)
1575 wdev->u.client.ssid_len = 0;
1576
1577 return err;
1578 }
1579
1580 /*
1581 * Used to clean up after the connection / connection attempt owner socket
1582 * disconnects
1583 */
cfg80211_autodisconnect_wk(struct work_struct * work)1584 void cfg80211_autodisconnect_wk(struct work_struct *work)
1585 {
1586 struct wireless_dev *wdev =
1587 container_of(work, struct wireless_dev, disconnect_wk);
1588 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1589
1590 wiphy_lock(wdev->wiphy);
1591 wdev_lock(wdev);
1592
1593 if (wdev->conn_owner_nlportid) {
1594 switch (wdev->iftype) {
1595 case NL80211_IFTYPE_ADHOC:
1596 __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1597 break;
1598 case NL80211_IFTYPE_AP:
1599 case NL80211_IFTYPE_P2P_GO:
1600 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1601 break;
1602 case NL80211_IFTYPE_MESH_POINT:
1603 __cfg80211_leave_mesh(rdev, wdev->netdev);
1604 break;
1605 case NL80211_IFTYPE_STATION:
1606 case NL80211_IFTYPE_P2P_CLIENT:
1607 /*
1608 * Use disconnect_bssid if still connecting and
1609 * ops->disconnect not implemented. Otherwise we can
1610 * use cfg80211_disconnect.
1611 */
1612 if (rdev->ops->disconnect || wdev->connected)
1613 cfg80211_disconnect(rdev, wdev->netdev,
1614 WLAN_REASON_DEAUTH_LEAVING,
1615 true);
1616 else
1617 cfg80211_mlme_deauth(rdev, wdev->netdev,
1618 wdev->disconnect_bssid,
1619 NULL, 0,
1620 WLAN_REASON_DEAUTH_LEAVING,
1621 false);
1622 break;
1623 default:
1624 break;
1625 }
1626 }
1627
1628 wdev_unlock(wdev);
1629 wiphy_unlock(wdev->wiphy);
1630 }
1631