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, 2022-2024 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 lockdep_assert_wiphy(wdev->wiphy);
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 = cfg80211_scan(rdev);
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 lockdep_assert_wiphy(wdev->wiphy);
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,
215 &req, NULL);
216 cfg80211_put_bss(&rdev->wiphy, req.bss);
217 }
218
219 if (err)
220 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
221 NULL, 0,
222 WLAN_REASON_DEAUTH_LEAVING,
223 false);
224 return err;
225 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
226 *treason = NL80211_TIMEOUT_ASSOC;
227 fallthrough;
228 case CFG80211_CONN_ASSOC_FAILED:
229 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
230 NULL, 0,
231 WLAN_REASON_DEAUTH_LEAVING, false);
232 return -ENOTCONN;
233 case CFG80211_CONN_DEAUTH:
234 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
235 NULL, 0,
236 WLAN_REASON_DEAUTH_LEAVING, false);
237 fallthrough;
238 case CFG80211_CONN_ABANDON:
239 /* free directly, disconnected event already sent */
240 cfg80211_sme_free(wdev);
241 return 0;
242 default:
243 return 0;
244 }
245 }
246
cfg80211_conn_work(struct work_struct * work)247 void cfg80211_conn_work(struct work_struct *work)
248 {
249 struct cfg80211_registered_device *rdev =
250 container_of(work, struct cfg80211_registered_device, conn_work);
251 struct wireless_dev *wdev;
252 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
253 enum nl80211_timeout_reason treason;
254
255 wiphy_lock(&rdev->wiphy);
256
257 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
258 if (!wdev->netdev)
259 continue;
260
261 if (!netif_running(wdev->netdev))
262 continue;
263
264 if (!wdev->conn ||
265 wdev->conn->state == CFG80211_CONN_CONNECTED)
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 }
283
284 wiphy_unlock(&rdev->wiphy);
285 }
286
cfg80211_step_auth_next(struct cfg80211_conn * conn,struct cfg80211_bss * bss)287 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
288 struct cfg80211_bss *bss)
289 {
290 memcpy(conn->bssid, bss->bssid, ETH_ALEN);
291 conn->params.bssid = conn->bssid;
292 conn->params.channel = bss->channel;
293 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
294 }
295
296 /* Returned bss is reference counted and must be cleaned up appropriately. */
cfg80211_get_conn_bss(struct wireless_dev * wdev)297 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
298 {
299 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
300 struct cfg80211_bss *bss;
301
302 lockdep_assert_wiphy(wdev->wiphy);
303
304 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
305 wdev->conn->params.bssid,
306 wdev->conn->params.ssid,
307 wdev->conn->params.ssid_len,
308 wdev->conn_bss_type,
309 IEEE80211_PRIVACY(wdev->conn->params.privacy));
310 if (!bss)
311 return NULL;
312
313 cfg80211_step_auth_next(wdev->conn, bss);
314 schedule_work(&rdev->conn_work);
315
316 return bss;
317 }
318
cfg80211_sme_scan_done(struct net_device * dev)319 void cfg80211_sme_scan_done(struct net_device *dev)
320 {
321 struct wireless_dev *wdev = dev->ieee80211_ptr;
322 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
323 struct cfg80211_bss *bss;
324
325 lockdep_assert_wiphy(wdev->wiphy);
326
327 if (!wdev->conn)
328 return;
329
330 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
331 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
332 return;
333
334 bss = cfg80211_get_conn_bss(wdev);
335 if (bss)
336 cfg80211_put_bss(&rdev->wiphy, bss);
337 else
338 schedule_work(&rdev->conn_work);
339 }
340
cfg80211_sme_rx_auth(struct wireless_dev * wdev,const u8 * buf,size_t len)341 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
342 {
343 struct wiphy *wiphy = wdev->wiphy;
344 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
345 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
346 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
347
348 lockdep_assert_wiphy(wdev->wiphy);
349
350 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
351 return;
352
353 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
354 wdev->conn->auto_auth &&
355 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
356 /* select automatically between only open, shared, leap */
357 switch (wdev->conn->params.auth_type) {
358 case NL80211_AUTHTYPE_OPEN_SYSTEM:
359 if (wdev->connect_keys)
360 wdev->conn->params.auth_type =
361 NL80211_AUTHTYPE_SHARED_KEY;
362 else
363 wdev->conn->params.auth_type =
364 NL80211_AUTHTYPE_NETWORK_EAP;
365 break;
366 case NL80211_AUTHTYPE_SHARED_KEY:
367 wdev->conn->params.auth_type =
368 NL80211_AUTHTYPE_NETWORK_EAP;
369 break;
370 default:
371 /* huh? */
372 wdev->conn->params.auth_type =
373 NL80211_AUTHTYPE_OPEN_SYSTEM;
374 break;
375 }
376 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
377 schedule_work(&rdev->conn_work);
378 } else if (status_code != WLAN_STATUS_SUCCESS) {
379 struct cfg80211_connect_resp_params cr;
380
381 memset(&cr, 0, sizeof(cr));
382 cr.status = status_code;
383 cr.links[0].bssid = mgmt->bssid;
384 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
385 __cfg80211_connect_result(wdev->netdev, &cr, false);
386 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
387 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
388 schedule_work(&rdev->conn_work);
389 }
390 }
391
cfg80211_sme_rx_assoc_resp(struct wireless_dev * wdev,u16 status)392 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
393 {
394 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
395
396 if (!wdev->conn)
397 return false;
398
399 if (status == WLAN_STATUS_SUCCESS) {
400 wdev->conn->state = CFG80211_CONN_CONNECTED;
401 return false;
402 }
403
404 if (wdev->conn->prev_bssid_valid) {
405 /*
406 * Some stupid APs don't accept reassoc, so we
407 * need to fall back to trying regular assoc;
408 * return true so no event is sent to userspace.
409 */
410 wdev->conn->prev_bssid_valid = false;
411 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
412 schedule_work(&rdev->conn_work);
413 return true;
414 }
415
416 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
417 schedule_work(&rdev->conn_work);
418 return false;
419 }
420
cfg80211_sme_deauth(struct wireless_dev * wdev)421 void cfg80211_sme_deauth(struct wireless_dev *wdev)
422 {
423 cfg80211_sme_free(wdev);
424 }
425
cfg80211_sme_auth_timeout(struct wireless_dev * wdev)426 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
427 {
428 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
429
430 if (!wdev->conn)
431 return;
432
433 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
434 schedule_work(&rdev->conn_work);
435 }
436
cfg80211_sme_disassoc(struct wireless_dev * wdev)437 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
438 {
439 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
440
441 if (!wdev->conn)
442 return;
443
444 wdev->conn->state = CFG80211_CONN_DEAUTH;
445 schedule_work(&rdev->conn_work);
446 }
447
cfg80211_sme_assoc_timeout(struct wireless_dev * wdev)448 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
449 {
450 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
451
452 if (!wdev->conn)
453 return;
454
455 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
456 schedule_work(&rdev->conn_work);
457 }
458
cfg80211_sme_abandon_assoc(struct wireless_dev * wdev)459 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
460 {
461 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
462
463 if (!wdev->conn)
464 return;
465
466 wdev->conn->state = CFG80211_CONN_ABANDON;
467 schedule_work(&rdev->conn_work);
468 }
469
cfg80211_wdev_release_bsses(struct wireless_dev * wdev)470 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
471 {
472 unsigned int link;
473
474 for_each_valid_link(wdev, link) {
475 if (!wdev->links[link].client.current_bss)
476 continue;
477 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
478 cfg80211_put_bss(wdev->wiphy,
479 &wdev->links[link].client.current_bss->pub);
480 wdev->links[link].client.current_bss = NULL;
481 }
482 }
483
cfg80211_wdev_release_link_bsses(struct wireless_dev * wdev,u16 link_mask)484 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
485 {
486 unsigned int link;
487
488 for_each_valid_link(wdev, link) {
489 if (!wdev->links[link].client.current_bss ||
490 !(link_mask & BIT(link)))
491 continue;
492 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
493 cfg80211_put_bss(wdev->wiphy,
494 &wdev->links[link].client.current_bss->pub);
495 wdev->links[link].client.current_bss = NULL;
496 }
497 }
498
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)499 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
500 const u8 *ies, size_t ies_len,
501 const u8 **out_ies, size_t *out_ies_len)
502 {
503 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
504 u8 *buf;
505 size_t offs;
506
507 if (!rdev->wiphy.extended_capabilities_len ||
508 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
509 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
510 if (!*out_ies)
511 return -ENOMEM;
512 *out_ies_len = ies_len;
513 return 0;
514 }
515
516 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
517 GFP_KERNEL);
518 if (!buf)
519 return -ENOMEM;
520
521 if (ies_len) {
522 static const u8 before_extcapa[] = {
523 /* not listing IEs expected to be created by driver */
524 WLAN_EID_RSN,
525 WLAN_EID_QOS_CAPA,
526 WLAN_EID_RRM_ENABLED_CAPABILITIES,
527 WLAN_EID_MOBILITY_DOMAIN,
528 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
529 WLAN_EID_BSS_COEX_2040,
530 };
531
532 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
533 ARRAY_SIZE(before_extcapa), 0);
534 memcpy(buf, ies, offs);
535 /* leave a whole for extended capabilities IE */
536 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
537 ies + offs, ies_len - offs);
538 } else {
539 offs = 0;
540 }
541
542 /* place extended capabilities IE (with only driver capabilities) */
543 buf[offs] = WLAN_EID_EXT_CAPABILITY;
544 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
545 memcpy(buf + offs + 2,
546 rdev->wiphy.extended_capabilities,
547 rdev->wiphy.extended_capabilities_len);
548
549 *out_ies = buf;
550 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
551
552 return 0;
553 }
554
cfg80211_sme_connect(struct wireless_dev * wdev,struct cfg80211_connect_params * connect,const u8 * prev_bssid)555 static int cfg80211_sme_connect(struct wireless_dev *wdev,
556 struct cfg80211_connect_params *connect,
557 const u8 *prev_bssid)
558 {
559 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
560 struct cfg80211_bss *bss;
561 int err;
562
563 if (!rdev->ops->auth || !rdev->ops->assoc)
564 return -EOPNOTSUPP;
565
566 cfg80211_wdev_release_bsses(wdev);
567
568 if (wdev->connected) {
569 cfg80211_sme_free(wdev);
570 wdev->connected = false;
571 }
572
573 if (wdev->conn)
574 return -EINPROGRESS;
575
576 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
577 if (!wdev->conn)
578 return -ENOMEM;
579
580 /*
581 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
582 */
583 memcpy(&wdev->conn->params, connect, sizeof(*connect));
584 if (connect->bssid) {
585 wdev->conn->params.bssid = wdev->conn->bssid;
586 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
587 }
588
589 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
590 &wdev->conn->ie,
591 &wdev->conn->params.ie_len)) {
592 kfree(wdev->conn);
593 wdev->conn = NULL;
594 return -ENOMEM;
595 }
596 wdev->conn->params.ie = wdev->conn->ie;
597
598 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
599 wdev->conn->auto_auth = true;
600 /* start with open system ... should mostly work */
601 wdev->conn->params.auth_type =
602 NL80211_AUTHTYPE_OPEN_SYSTEM;
603 } else {
604 wdev->conn->auto_auth = false;
605 }
606
607 wdev->conn->params.ssid = wdev->u.client.ssid;
608 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
609
610 /* see if we have the bss already */
611 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
612 wdev->conn->params.bssid,
613 wdev->conn->params.ssid,
614 wdev->conn->params.ssid_len,
615 wdev->conn_bss_type,
616 IEEE80211_PRIVACY(wdev->conn->params.privacy));
617
618 if (prev_bssid) {
619 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
620 wdev->conn->prev_bssid_valid = true;
621 }
622
623 /* we're good if we have a matching bss struct */
624 if (bss) {
625 enum nl80211_timeout_reason treason;
626
627 cfg80211_step_auth_next(wdev->conn, bss);
628 err = cfg80211_conn_do_work(wdev, &treason);
629 cfg80211_put_bss(wdev->wiphy, bss);
630 } else {
631 /* otherwise we'll need to scan for the AP first */
632 err = cfg80211_conn_scan(wdev);
633
634 /*
635 * If we can't scan right now, then we need to scan again
636 * after the current scan finished, since the parameters
637 * changed (unless we find a good AP anyway).
638 */
639 if (err == -EBUSY) {
640 err = 0;
641 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
642 }
643 }
644
645 if (err)
646 cfg80211_sme_free(wdev);
647
648 return err;
649 }
650
cfg80211_sme_disconnect(struct wireless_dev * wdev,u16 reason)651 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
652 {
653 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
654 int err;
655
656 if (!wdev->conn)
657 return 0;
658
659 if (!rdev->ops->deauth)
660 return -EOPNOTSUPP;
661
662 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
663 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
664 err = 0;
665 goto out;
666 }
667
668 /* wdev->conn->params.bssid must be set if > SCANNING */
669 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
670 wdev->conn->params.bssid,
671 NULL, 0, reason, false);
672 out:
673 cfg80211_sme_free(wdev);
674 return err;
675 }
676
677 /*
678 * code shared for in-device and software SME
679 */
680
cfg80211_is_all_idle(void)681 static bool cfg80211_is_all_idle(void)
682 {
683 struct cfg80211_registered_device *rdev;
684 struct wireless_dev *wdev;
685 bool is_all_idle = true;
686
687 /*
688 * All devices must be idle as otherwise if you are actively
689 * scanning some new beacon hints could be learned and would
690 * count as new regulatory hints.
691 * Also if there is any other active beaconing interface we
692 * need not issue a disconnect hint and reset any info such
693 * as chan dfs state, etc.
694 */
695 for_each_rdev(rdev) {
696 wiphy_lock(&rdev->wiphy);
697 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
698 if (wdev->conn || wdev->connected ||
699 cfg80211_beaconing_iface_active(wdev))
700 is_all_idle = false;
701 }
702 wiphy_unlock(&rdev->wiphy);
703 }
704
705 return is_all_idle;
706 }
707
disconnect_work(struct work_struct * work)708 static void disconnect_work(struct work_struct *work)
709 {
710 rtnl_lock();
711 if (cfg80211_is_all_idle())
712 regulatory_hint_disconnect();
713 rtnl_unlock();
714 }
715
716 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
717
718 static void
cfg80211_connect_result_release_bsses(struct wireless_dev * wdev,struct cfg80211_connect_resp_params * cr)719 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
720 struct cfg80211_connect_resp_params *cr)
721 {
722 unsigned int link;
723
724 for_each_valid_link(cr, link) {
725 if (!cr->links[link].bss)
726 continue;
727 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
728 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
729 }
730 }
731
732 /*
733 * API calls for drivers implementing connect/disconnect and
734 * SME event handling
735 */
736
737 /* This method must consume bss one way or another */
__cfg80211_connect_result(struct net_device * dev,struct cfg80211_connect_resp_params * cr,bool wextev)738 void __cfg80211_connect_result(struct net_device *dev,
739 struct cfg80211_connect_resp_params *cr,
740 bool wextev)
741 {
742 struct wireless_dev *wdev = dev->ieee80211_ptr;
743 const struct element *country_elem = NULL;
744 const struct element *ssid;
745 const u8 *country_data;
746 u8 country_datalen;
747 #ifdef CONFIG_CFG80211_WEXT
748 union iwreq_data wrqu;
749 #endif
750 unsigned int link;
751 const u8 *connected_addr;
752 bool bss_not_found = false;
753
754 lockdep_assert_wiphy(wdev->wiphy);
755
756 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
757 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
758 goto out;
759
760 if (cr->valid_links) {
761 if (WARN_ON(!cr->ap_mld_addr))
762 goto out;
763
764 for_each_valid_link(cr, link) {
765 if (WARN_ON(!cr->links[link].addr))
766 goto out;
767 }
768
769 if (WARN_ON(wdev->connect_keys))
770 goto out;
771 }
772
773 wdev->unprot_beacon_reported = 0;
774 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
775 GFP_KERNEL);
776 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
777
778 #ifdef CONFIG_CFG80211_WEXT
779 if (wextev && !cr->valid_links) {
780 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
781 memset(&wrqu, 0, sizeof(wrqu));
782 wrqu.data.length = cr->req_ie_len;
783 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
784 cr->req_ie);
785 }
786
787 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
788 memset(&wrqu, 0, sizeof(wrqu));
789 wrqu.data.length = cr->resp_ie_len;
790 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
791 cr->resp_ie);
792 }
793
794 memset(&wrqu, 0, sizeof(wrqu));
795 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
796 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
797 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
798 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
799 wdev->wext.prev_bssid_valid = true;
800 }
801 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
802 }
803 #endif
804
805 if (cr->status == WLAN_STATUS_SUCCESS) {
806 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
807 for_each_valid_link(cr, link) {
808 if (WARN_ON_ONCE(!cr->links[link].bss))
809 break;
810 }
811 }
812
813 for_each_valid_link(cr, link) {
814 /* don't do extra lookups for failures */
815 if (cr->links[link].status != WLAN_STATUS_SUCCESS)
816 continue;
817
818 if (cr->links[link].bss)
819 continue;
820
821 cr->links[link].bss =
822 cfg80211_get_bss(wdev->wiphy, NULL,
823 cr->links[link].bssid,
824 wdev->u.client.ssid,
825 wdev->u.client.ssid_len,
826 wdev->conn_bss_type,
827 IEEE80211_PRIVACY_ANY);
828 if (!cr->links[link].bss) {
829 bss_not_found = true;
830 break;
831 }
832 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
833 }
834 }
835
836 cfg80211_wdev_release_bsses(wdev);
837
838 if (cr->status != WLAN_STATUS_SUCCESS) {
839 kfree_sensitive(wdev->connect_keys);
840 wdev->connect_keys = NULL;
841 wdev->u.client.ssid_len = 0;
842 wdev->conn_owner_nlportid = 0;
843 cfg80211_connect_result_release_bsses(wdev, cr);
844 cfg80211_sme_free(wdev);
845 return;
846 }
847
848 if (WARN_ON(bss_not_found)) {
849 cfg80211_connect_result_release_bsses(wdev, cr);
850 return;
851 }
852
853 memset(wdev->links, 0, sizeof(wdev->links));
854 for_each_valid_link(cr, link) {
855 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
856 continue;
857 cr->valid_links &= ~BIT(link);
858 /* don't require bss pointer for failed links */
859 if (!cr->links[link].bss)
860 continue;
861 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
862 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
863 }
864 wdev->valid_links = cr->valid_links;
865 for_each_valid_link(cr, link)
866 wdev->links[link].client.current_bss =
867 bss_from_pub(cr->links[link].bss);
868 wdev->connected = true;
869 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
870 if (cr->valid_links) {
871 for_each_valid_link(cr, link)
872 memcpy(wdev->links[link].addr, cr->links[link].addr,
873 ETH_ALEN);
874 }
875
876 cfg80211_upload_connect_keys(wdev);
877
878 rcu_read_lock();
879 for_each_valid_link(cr, link) {
880 country_elem =
881 ieee80211_bss_get_elem(cr->links[link].bss,
882 WLAN_EID_COUNTRY);
883 if (country_elem)
884 break;
885 }
886 if (!country_elem) {
887 rcu_read_unlock();
888 return;
889 }
890
891 country_datalen = country_elem->datalen;
892 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
893 rcu_read_unlock();
894
895 if (!country_data)
896 return;
897
898 regulatory_hint_country_ie(wdev->wiphy,
899 cr->links[link].bss->channel->band,
900 country_data, country_datalen);
901 kfree(country_data);
902
903 if (!wdev->u.client.ssid_len) {
904 rcu_read_lock();
905 for_each_valid_link(cr, link) {
906 ssid = ieee80211_bss_get_elem(cr->links[link].bss,
907 WLAN_EID_SSID);
908
909 if (!ssid || !ssid->datalen)
910 continue;
911
912 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
913 wdev->u.client.ssid_len = ssid->datalen;
914 break;
915 }
916 rcu_read_unlock();
917 }
918
919 return;
920 out:
921 for_each_valid_link(cr, link)
922 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
923 }
924
cfg80211_update_link_bss(struct wireless_dev * wdev,struct cfg80211_bss ** bss)925 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
926 struct cfg80211_bss **bss)
927 {
928 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
929 struct cfg80211_internal_bss *ibss;
930
931 if (!*bss)
932 return;
933
934 ibss = bss_from_pub(*bss);
935 if (list_empty(&ibss->list)) {
936 struct cfg80211_bss *found = NULL, *tmp = *bss;
937
938 found = cfg80211_get_bss(wdev->wiphy, NULL,
939 (*bss)->bssid,
940 wdev->u.client.ssid,
941 wdev->u.client.ssid_len,
942 wdev->conn_bss_type,
943 IEEE80211_PRIVACY_ANY);
944 if (found) {
945 /* The same BSS is already updated so use it
946 * instead, as it has latest info.
947 */
948 *bss = found;
949 } else {
950 /* Update with BSS provided by driver, it will
951 * be freshly added and ref cnted, we can free
952 * the old one.
953 *
954 * signal_valid can be false, as we are not
955 * expecting the BSS to be found.
956 *
957 * keep the old timestamp to avoid confusion
958 */
959 cfg80211_bss_update(rdev, ibss, false,
960 ibss->ts);
961 }
962
963 cfg80211_put_bss(wdev->wiphy, tmp);
964 }
965 }
966
967 /* Consumes bss object(s) one way or another */
cfg80211_connect_done(struct net_device * dev,struct cfg80211_connect_resp_params * params,gfp_t gfp)968 void cfg80211_connect_done(struct net_device *dev,
969 struct cfg80211_connect_resp_params *params,
970 gfp_t gfp)
971 {
972 struct wireless_dev *wdev = dev->ieee80211_ptr;
973 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
974 struct cfg80211_event *ev;
975 unsigned long flags;
976 u8 *next;
977 size_t link_info_size = 0;
978 unsigned int link;
979
980 for_each_valid_link(params, link) {
981 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss);
982 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
983 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
984 }
985
986 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
987 params->req_ie_len + params->resp_ie_len +
988 params->fils.kek_len + params->fils.pmk_len +
989 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
990 gfp);
991
992 if (!ev) {
993 for_each_valid_link(params, link)
994 cfg80211_put_bss(wdev->wiphy,
995 params->links[link].bss);
996 return;
997 }
998
999 ev->type = EVENT_CONNECT_RESULT;
1000 next = ((u8 *)ev) + sizeof(*ev);
1001 if (params->ap_mld_addr) {
1002 ev->cr.ap_mld_addr = next;
1003 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1004 ETH_ALEN);
1005 next += ETH_ALEN;
1006 }
1007 if (params->req_ie_len) {
1008 ev->cr.req_ie = next;
1009 ev->cr.req_ie_len = params->req_ie_len;
1010 memcpy((void *)ev->cr.req_ie, params->req_ie,
1011 params->req_ie_len);
1012 next += params->req_ie_len;
1013 }
1014 if (params->resp_ie_len) {
1015 ev->cr.resp_ie = next;
1016 ev->cr.resp_ie_len = params->resp_ie_len;
1017 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1018 params->resp_ie_len);
1019 next += params->resp_ie_len;
1020 }
1021 if (params->fils.kek_len) {
1022 ev->cr.fils.kek = next;
1023 ev->cr.fils.kek_len = params->fils.kek_len;
1024 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1025 params->fils.kek_len);
1026 next += params->fils.kek_len;
1027 }
1028 if (params->fils.pmk_len) {
1029 ev->cr.fils.pmk = next;
1030 ev->cr.fils.pmk_len = params->fils.pmk_len;
1031 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1032 params->fils.pmk_len);
1033 next += params->fils.pmk_len;
1034 }
1035 if (params->fils.pmkid) {
1036 ev->cr.fils.pmkid = next;
1037 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1038 WLAN_PMKID_LEN);
1039 next += WLAN_PMKID_LEN;
1040 }
1041 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1042 if (params->fils.update_erp_next_seq_num)
1043 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1044 ev->cr.valid_links = params->valid_links;
1045 for_each_valid_link(params, link) {
1046 if (params->links[link].bss)
1047 cfg80211_hold_bss(
1048 bss_from_pub(params->links[link].bss));
1049 ev->cr.links[link].bss = params->links[link].bss;
1050 ev->cr.links[link].status = params->links[link].status;
1051
1052 if (params->links[link].addr) {
1053 ev->cr.links[link].addr = next;
1054 memcpy((void *)ev->cr.links[link].addr,
1055 params->links[link].addr,
1056 ETH_ALEN);
1057 next += ETH_ALEN;
1058 }
1059 if (params->links[link].bssid) {
1060 ev->cr.links[link].bssid = next;
1061 memcpy((void *)ev->cr.links[link].bssid,
1062 params->links[link].bssid,
1063 ETH_ALEN);
1064 next += ETH_ALEN;
1065 }
1066 }
1067 ev->cr.status = params->status;
1068 ev->cr.timeout_reason = params->timeout_reason;
1069
1070 spin_lock_irqsave(&wdev->event_lock, flags);
1071 list_add_tail(&ev->list, &wdev->event_list);
1072 spin_unlock_irqrestore(&wdev->event_lock, flags);
1073 queue_work(cfg80211_wq, &rdev->event_work);
1074 }
1075 EXPORT_SYMBOL(cfg80211_connect_done);
1076
1077 /* Consumes bss object one way or another */
__cfg80211_roamed(struct wireless_dev * wdev,struct cfg80211_roam_info * info)1078 void __cfg80211_roamed(struct wireless_dev *wdev,
1079 struct cfg80211_roam_info *info)
1080 {
1081 #ifdef CONFIG_CFG80211_WEXT
1082 union iwreq_data wrqu;
1083 #endif
1084 unsigned int link;
1085 const u8 *connected_addr;
1086
1087 lockdep_assert_wiphy(wdev->wiphy);
1088
1089 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1090 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1091 goto out;
1092
1093 if (WARN_ON(!wdev->connected))
1094 goto out;
1095
1096 if (info->valid_links) {
1097 if (WARN_ON(!info->ap_mld_addr))
1098 goto out;
1099
1100 for_each_valid_link(info, link) {
1101 if (WARN_ON(!info->links[link].addr))
1102 goto out;
1103 }
1104 }
1105
1106 cfg80211_wdev_release_bsses(wdev);
1107
1108 for_each_valid_link(info, link) {
1109 if (WARN_ON(!info->links[link].bss))
1110 goto out;
1111 }
1112
1113 memset(wdev->links, 0, sizeof(wdev->links));
1114 wdev->valid_links = info->valid_links;
1115 for_each_valid_link(info, link) {
1116 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1117 wdev->links[link].client.current_bss =
1118 bss_from_pub(info->links[link].bss);
1119 }
1120
1121 connected_addr = info->valid_links ?
1122 info->ap_mld_addr :
1123 info->links[0].bss->bssid;
1124 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1125 if (info->valid_links) {
1126 for_each_valid_link(info, link)
1127 memcpy(wdev->links[link].addr, info->links[link].addr,
1128 ETH_ALEN);
1129 }
1130 wdev->unprot_beacon_reported = 0;
1131 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1132 wdev->netdev, info, GFP_KERNEL);
1133
1134 #ifdef CONFIG_CFG80211_WEXT
1135 if (!info->valid_links) {
1136 if (info->req_ie) {
1137 memset(&wrqu, 0, sizeof(wrqu));
1138 wrqu.data.length = info->req_ie_len;
1139 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1140 &wrqu, info->req_ie);
1141 }
1142
1143 if (info->resp_ie) {
1144 memset(&wrqu, 0, sizeof(wrqu));
1145 wrqu.data.length = info->resp_ie_len;
1146 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1147 &wrqu, info->resp_ie);
1148 }
1149
1150 memset(&wrqu, 0, sizeof(wrqu));
1151 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1152 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1153 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1154 wdev->wext.prev_bssid_valid = true;
1155 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1156 }
1157 #endif
1158
1159 return;
1160 out:
1161 for_each_valid_link(info, link)
1162 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1163 }
1164
1165 /* Consumes info->links.bss object(s) one way or another */
cfg80211_roamed(struct net_device * dev,struct cfg80211_roam_info * info,gfp_t gfp)1166 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1167 gfp_t gfp)
1168 {
1169 struct wireless_dev *wdev = dev->ieee80211_ptr;
1170 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1171 struct cfg80211_event *ev;
1172 unsigned long flags;
1173 u8 *next;
1174 unsigned int link;
1175 size_t link_info_size = 0;
1176 bool bss_not_found = false;
1177
1178 for_each_valid_link(info, link) {
1179 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1180 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1181
1182 if (info->links[link].bss)
1183 continue;
1184
1185 info->links[link].bss =
1186 cfg80211_get_bss(wdev->wiphy,
1187 info->links[link].channel,
1188 info->links[link].bssid,
1189 wdev->u.client.ssid,
1190 wdev->u.client.ssid_len,
1191 wdev->conn_bss_type,
1192 IEEE80211_PRIVACY_ANY);
1193
1194 if (!info->links[link].bss) {
1195 bss_not_found = true;
1196 break;
1197 }
1198 }
1199
1200 if (WARN_ON(bss_not_found))
1201 goto out;
1202
1203 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1204 info->fils.kek_len + info->fils.pmk_len +
1205 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1206 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1207 if (!ev)
1208 goto out;
1209
1210 ev->type = EVENT_ROAMED;
1211 next = ((u8 *)ev) + sizeof(*ev);
1212 if (info->req_ie_len) {
1213 ev->rm.req_ie = next;
1214 ev->rm.req_ie_len = info->req_ie_len;
1215 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1216 next += info->req_ie_len;
1217 }
1218 if (info->resp_ie_len) {
1219 ev->rm.resp_ie = next;
1220 ev->rm.resp_ie_len = info->resp_ie_len;
1221 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1222 info->resp_ie_len);
1223 next += info->resp_ie_len;
1224 }
1225 if (info->fils.kek_len) {
1226 ev->rm.fils.kek = next;
1227 ev->rm.fils.kek_len = info->fils.kek_len;
1228 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1229 info->fils.kek_len);
1230 next += info->fils.kek_len;
1231 }
1232 if (info->fils.pmk_len) {
1233 ev->rm.fils.pmk = next;
1234 ev->rm.fils.pmk_len = info->fils.pmk_len;
1235 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1236 info->fils.pmk_len);
1237 next += info->fils.pmk_len;
1238 }
1239 if (info->fils.pmkid) {
1240 ev->rm.fils.pmkid = next;
1241 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1242 WLAN_PMKID_LEN);
1243 next += WLAN_PMKID_LEN;
1244 }
1245 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1246 if (info->fils.update_erp_next_seq_num)
1247 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1248 if (info->ap_mld_addr) {
1249 ev->rm.ap_mld_addr = next;
1250 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1251 ETH_ALEN);
1252 next += ETH_ALEN;
1253 }
1254 ev->rm.valid_links = info->valid_links;
1255 for_each_valid_link(info, link) {
1256 ev->rm.links[link].bss = info->links[link].bss;
1257
1258 if (info->links[link].addr) {
1259 ev->rm.links[link].addr = next;
1260 memcpy((void *)ev->rm.links[link].addr,
1261 info->links[link].addr,
1262 ETH_ALEN);
1263 next += ETH_ALEN;
1264 }
1265
1266 if (info->links[link].bssid) {
1267 ev->rm.links[link].bssid = next;
1268 memcpy((void *)ev->rm.links[link].bssid,
1269 info->links[link].bssid,
1270 ETH_ALEN);
1271 next += ETH_ALEN;
1272 }
1273 }
1274
1275 spin_lock_irqsave(&wdev->event_lock, flags);
1276 list_add_tail(&ev->list, &wdev->event_list);
1277 spin_unlock_irqrestore(&wdev->event_lock, flags);
1278 queue_work(cfg80211_wq, &rdev->event_work);
1279
1280 return;
1281 out:
1282 for_each_valid_link(info, link)
1283 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1284
1285 }
1286 EXPORT_SYMBOL(cfg80211_roamed);
1287
__cfg80211_port_authorized(struct wireless_dev * wdev,const u8 * peer_addr,const u8 * td_bitmap,u8 td_bitmap_len)1288 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1289 const u8 *td_bitmap, u8 td_bitmap_len)
1290 {
1291 lockdep_assert_wiphy(wdev->wiphy);
1292
1293 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1294 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1295 wdev->iftype != NL80211_IFTYPE_AP &&
1296 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1297 return;
1298
1299 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1300 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1301 if (WARN_ON(!wdev->connected) ||
1302 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1303 return;
1304 }
1305
1306 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1307 peer_addr, td_bitmap, td_bitmap_len);
1308 }
1309
cfg80211_port_authorized(struct net_device * dev,const u8 * peer_addr,const u8 * td_bitmap,u8 td_bitmap_len,gfp_t gfp)1310 void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1311 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1312 {
1313 struct wireless_dev *wdev = dev->ieee80211_ptr;
1314 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1315 struct cfg80211_event *ev;
1316 unsigned long flags;
1317
1318 if (WARN_ON(!peer_addr))
1319 return;
1320
1321 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1322 if (!ev)
1323 return;
1324
1325 ev->type = EVENT_PORT_AUTHORIZED;
1326 memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1327 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1328 ev->pa.td_bitmap_len = td_bitmap_len;
1329 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1330
1331 /*
1332 * Use the wdev event list so that if there are pending
1333 * connected/roamed events, they will be reported first.
1334 */
1335 spin_lock_irqsave(&wdev->event_lock, flags);
1336 list_add_tail(&ev->list, &wdev->event_list);
1337 spin_unlock_irqrestore(&wdev->event_lock, flags);
1338 queue_work(cfg80211_wq, &rdev->event_work);
1339 }
1340 EXPORT_SYMBOL(cfg80211_port_authorized);
1341
__cfg80211_disconnected(struct net_device * dev,const u8 * ie,size_t ie_len,u16 reason,bool from_ap)1342 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1343 size_t ie_len, u16 reason, bool from_ap)
1344 {
1345 struct wireless_dev *wdev = dev->ieee80211_ptr;
1346 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1347 int i;
1348 #ifdef CONFIG_CFG80211_WEXT
1349 union iwreq_data wrqu;
1350 #endif
1351
1352 lockdep_assert_wiphy(wdev->wiphy);
1353
1354 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1355 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1356 return;
1357
1358 cfg80211_wdev_release_bsses(wdev);
1359 wdev->valid_links = 0;
1360 wdev->connected = false;
1361 wdev->u.client.ssid_len = 0;
1362 wdev->conn_owner_nlportid = 0;
1363 kfree_sensitive(wdev->connect_keys);
1364 wdev->connect_keys = NULL;
1365
1366 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1367
1368 /* stop critical protocol if supported */
1369 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1370 rdev->crit_proto_nlportid = 0;
1371 rdev_crit_proto_stop(rdev, wdev);
1372 }
1373
1374 /*
1375 * Delete all the keys ... pairwise keys can't really
1376 * exist any more anyway, but default keys might.
1377 */
1378 if (rdev->ops->del_key) {
1379 int max_key_idx = 5;
1380
1381 if (wiphy_ext_feature_isset(
1382 wdev->wiphy,
1383 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1384 wiphy_ext_feature_isset(
1385 wdev->wiphy,
1386 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1387 max_key_idx = 7;
1388 for (i = 0; i <= max_key_idx; i++)
1389 rdev_del_key(rdev, dev, -1, i, false, NULL);
1390 }
1391
1392 rdev_set_qos_map(rdev, dev, NULL);
1393
1394 #ifdef CONFIG_CFG80211_WEXT
1395 memset(&wrqu, 0, sizeof(wrqu));
1396 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1397 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1398 wdev->wext.connect.ssid_len = 0;
1399 #endif
1400
1401 schedule_work(&cfg80211_disconnect_work);
1402
1403 cfg80211_schedule_channels_check(wdev);
1404 }
1405
cfg80211_disconnected(struct net_device * dev,u16 reason,const u8 * ie,size_t ie_len,bool locally_generated,gfp_t gfp)1406 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1407 const u8 *ie, size_t ie_len,
1408 bool locally_generated, gfp_t gfp)
1409 {
1410 struct wireless_dev *wdev = dev->ieee80211_ptr;
1411 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1412 struct cfg80211_event *ev;
1413 unsigned long flags;
1414
1415 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1416 if (!ev)
1417 return;
1418
1419 ev->type = EVENT_DISCONNECTED;
1420 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1421 ev->dc.ie_len = ie_len;
1422 memcpy((void *)ev->dc.ie, ie, ie_len);
1423 ev->dc.reason = reason;
1424 ev->dc.locally_generated = locally_generated;
1425
1426 spin_lock_irqsave(&wdev->event_lock, flags);
1427 list_add_tail(&ev->list, &wdev->event_list);
1428 spin_unlock_irqrestore(&wdev->event_lock, flags);
1429 queue_work(cfg80211_wq, &rdev->event_work);
1430 }
1431 EXPORT_SYMBOL(cfg80211_disconnected);
1432
1433 /*
1434 * API calls for nl80211/wext compatibility code
1435 */
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)1436 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1437 struct net_device *dev,
1438 struct cfg80211_connect_params *connect,
1439 struct cfg80211_cached_keys *connkeys,
1440 const u8 *prev_bssid)
1441 {
1442 struct wireless_dev *wdev = dev->ieee80211_ptr;
1443 int err;
1444
1445 lockdep_assert_wiphy(wdev->wiphy);
1446
1447 /*
1448 * If we have an ssid_len, we're trying to connect or are
1449 * already connected, so reject a new SSID unless it's the
1450 * same (which is the case for re-association.)
1451 */
1452 if (wdev->u.client.ssid_len &&
1453 (wdev->u.client.ssid_len != connect->ssid_len ||
1454 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1455 return -EALREADY;
1456
1457 /*
1458 * If connected, reject (re-)association unless prev_bssid
1459 * matches the current BSSID.
1460 */
1461 if (wdev->connected) {
1462 if (!prev_bssid)
1463 return -EALREADY;
1464 if (!ether_addr_equal(prev_bssid,
1465 wdev->u.client.connected_addr))
1466 return -ENOTCONN;
1467 }
1468
1469 /*
1470 * Reject if we're in the process of connecting with WEP,
1471 * this case isn't very interesting and trying to handle
1472 * it would make the code much more complex.
1473 */
1474 if (wdev->connect_keys)
1475 return -EINPROGRESS;
1476
1477 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1478 rdev->wiphy.ht_capa_mod_mask);
1479 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1480 rdev->wiphy.vht_capa_mod_mask);
1481
1482 if (connkeys && connkeys->def >= 0) {
1483 int idx;
1484 u32 cipher;
1485
1486 idx = connkeys->def;
1487 cipher = connkeys->params[idx].cipher;
1488 /* If given a WEP key we may need it for shared key auth */
1489 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1490 cipher == WLAN_CIPHER_SUITE_WEP104) {
1491 connect->key_idx = idx;
1492 connect->key = connkeys->params[idx].key;
1493 connect->key_len = connkeys->params[idx].key_len;
1494
1495 /*
1496 * If ciphers are not set (e.g. when going through
1497 * iwconfig), we have to set them appropriately here.
1498 */
1499 if (connect->crypto.cipher_group == 0)
1500 connect->crypto.cipher_group = cipher;
1501
1502 if (connect->crypto.n_ciphers_pairwise == 0) {
1503 connect->crypto.n_ciphers_pairwise = 1;
1504 connect->crypto.ciphers_pairwise[0] = cipher;
1505 }
1506 }
1507 } else {
1508 if (WARN_ON(connkeys))
1509 return -EINVAL;
1510
1511 /* connect can point to wdev->wext.connect which
1512 * can hold key data from a previous connection
1513 */
1514 connect->key = NULL;
1515 connect->key_len = 0;
1516 connect->key_idx = 0;
1517 }
1518
1519 wdev->connect_keys = connkeys;
1520 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1521 wdev->u.client.ssid_len = connect->ssid_len;
1522
1523 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1524 IEEE80211_BSS_TYPE_ESS;
1525
1526 if (!rdev->ops->connect)
1527 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1528 else
1529 err = rdev_connect(rdev, dev, connect);
1530
1531 if (err) {
1532 wdev->connect_keys = NULL;
1533 /*
1534 * This could be reassoc getting refused, don't clear
1535 * ssid_len in that case.
1536 */
1537 if (!wdev->connected)
1538 wdev->u.client.ssid_len = 0;
1539 return err;
1540 }
1541
1542 return 0;
1543 }
1544
cfg80211_disconnect(struct cfg80211_registered_device * rdev,struct net_device * dev,u16 reason,bool wextev)1545 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1546 struct net_device *dev, u16 reason, bool wextev)
1547 {
1548 struct wireless_dev *wdev = dev->ieee80211_ptr;
1549 int err = 0;
1550
1551 lockdep_assert_wiphy(wdev->wiphy);
1552
1553 kfree_sensitive(wdev->connect_keys);
1554 wdev->connect_keys = NULL;
1555
1556 wdev->conn_owner_nlportid = 0;
1557
1558 if (wdev->conn)
1559 err = cfg80211_sme_disconnect(wdev, reason);
1560 else if (!rdev->ops->disconnect)
1561 cfg80211_mlme_down(rdev, dev);
1562 else if (wdev->u.client.ssid_len)
1563 err = rdev_disconnect(rdev, dev, reason);
1564
1565 /*
1566 * Clear ssid_len unless we actually were fully connected,
1567 * in which case cfg80211_disconnected() will take care of
1568 * this later.
1569 */
1570 if (!wdev->connected)
1571 wdev->u.client.ssid_len = 0;
1572
1573 return err;
1574 }
1575
1576 /*
1577 * Used to clean up after the connection / connection attempt owner socket
1578 * disconnects
1579 */
cfg80211_autodisconnect_wk(struct work_struct * work)1580 void cfg80211_autodisconnect_wk(struct work_struct *work)
1581 {
1582 struct wireless_dev *wdev =
1583 container_of(work, struct wireless_dev, disconnect_wk);
1584 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1585
1586 wiphy_lock(wdev->wiphy);
1587
1588 if (wdev->conn_owner_nlportid) {
1589 switch (wdev->iftype) {
1590 case NL80211_IFTYPE_ADHOC:
1591 cfg80211_leave_ibss(rdev, wdev->netdev, false);
1592 break;
1593 case NL80211_IFTYPE_AP:
1594 case NL80211_IFTYPE_P2P_GO:
1595 cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1596 break;
1597 case NL80211_IFTYPE_MESH_POINT:
1598 cfg80211_leave_mesh(rdev, wdev->netdev);
1599 break;
1600 case NL80211_IFTYPE_STATION:
1601 case NL80211_IFTYPE_P2P_CLIENT:
1602 /*
1603 * Use disconnect_bssid if still connecting and
1604 * ops->disconnect not implemented. Otherwise we can
1605 * use cfg80211_disconnect.
1606 */
1607 if (rdev->ops->disconnect || wdev->connected)
1608 cfg80211_disconnect(rdev, wdev->netdev,
1609 WLAN_REASON_DEAUTH_LEAVING,
1610 true);
1611 else
1612 cfg80211_mlme_deauth(rdev, wdev->netdev,
1613 wdev->disconnect_bssid,
1614 NULL, 0,
1615 WLAN_REASON_DEAUTH_LEAVING,
1616 false);
1617 break;
1618 default:
1619 break;
1620 }
1621 }
1622
1623 wiphy_unlock(wdev->wiphy);
1624 }
1625