1 /*
2 * SME code for cfg80211
3 * both driver SME event handling and the SME implementation
4 * (for nl80211's connect() and wext)
5 *
6 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (C) 2009 Intel Corporation. All rights reserved.
8 */
9
10 #include <linux/etherdevice.h>
11 #include <linux/if_arp.h>
12 #include <linux/slab.h>
13 #include <linux/workqueue.h>
14 #include <linux/wireless.h>
15 #include <linux/export.h>
16 #include <net/iw_handler.h>
17 #include <net/cfg80211.h>
18 #include <net/rtnetlink.h>
19 #include "nl80211.h"
20 #include "reg.h"
21 #include "rdev-ops.h"
22
23 /*
24 * Software SME in cfg80211, using auth/assoc/deauth calls to the
25 * driver. This is is for implementing nl80211's connect/disconnect
26 * and wireless extensions (if configured.)
27 */
28
29 struct cfg80211_conn {
30 struct cfg80211_connect_params params;
31 /* these are sub-states of the _CONNECTING sme_state */
32 enum {
33 CFG80211_CONN_SCANNING,
34 CFG80211_CONN_SCAN_AGAIN,
35 CFG80211_CONN_AUTHENTICATE_NEXT,
36 CFG80211_CONN_AUTHENTICATING,
37 CFG80211_CONN_AUTH_FAILED,
38 CFG80211_CONN_ASSOCIATE_NEXT,
39 CFG80211_CONN_ASSOCIATING,
40 CFG80211_CONN_ASSOC_FAILED,
41 CFG80211_CONN_DEAUTH,
42 CFG80211_CONN_CONNECTED,
43 } state;
44 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
45 u8 *ie;
46 size_t ie_len;
47 bool auto_auth, prev_bssid_valid;
48 };
49
cfg80211_sme_free(struct wireless_dev * wdev)50 static void cfg80211_sme_free(struct wireless_dev *wdev)
51 {
52 if (!wdev->conn)
53 return;
54
55 kfree(wdev->conn->ie);
56 kfree(wdev->conn);
57 wdev->conn = NULL;
58 }
59
cfg80211_conn_scan(struct wireless_dev * wdev)60 static int cfg80211_conn_scan(struct wireless_dev *wdev)
61 {
62 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
63 struct cfg80211_scan_request *request;
64 int n_channels, err;
65
66 ASSERT_RTNL();
67 ASSERT_WDEV_LOCK(wdev);
68
69 if (rdev->scan_req || rdev->scan_msg)
70 return -EBUSY;
71
72 if (wdev->conn->params.channel)
73 n_channels = 1;
74 else
75 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
76
77 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
78 sizeof(request->channels[0]) * n_channels,
79 GFP_KERNEL);
80 if (!request)
81 return -ENOMEM;
82
83 if (wdev->conn->params.channel)
84 request->channels[0] = wdev->conn->params.channel;
85 else {
86 int i = 0, j;
87 enum ieee80211_band band;
88 struct ieee80211_supported_band *bands;
89 struct ieee80211_channel *channel;
90
91 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
92 bands = wdev->wiphy->bands[band];
93 if (!bands)
94 continue;
95 for (j = 0; j < bands->n_channels; j++) {
96 channel = &bands->channels[j];
97 if (channel->flags & IEEE80211_CHAN_DISABLED)
98 continue;
99 request->channels[i++] = channel;
100 }
101 request->rates[band] = (1 << bands->n_bitrates) - 1;
102 }
103 n_channels = i;
104 }
105 request->n_channels = n_channels;
106 request->ssids = (void *)&request->channels[n_channels];
107 request->n_ssids = 1;
108
109 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
110 wdev->conn->params.ssid_len);
111 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
112
113 request->wdev = wdev;
114 request->wiphy = &rdev->wiphy;
115 request->scan_start = jiffies;
116
117 rdev->scan_req = request;
118
119 err = rdev_scan(rdev, request);
120 if (!err) {
121 wdev->conn->state = CFG80211_CONN_SCANNING;
122 nl80211_send_scan_start(rdev, wdev);
123 dev_hold(wdev->netdev);
124 } else {
125 rdev->scan_req = NULL;
126 kfree(request);
127 }
128 return err;
129 }
130
cfg80211_conn_do_work(struct wireless_dev * wdev)131 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
132 {
133 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
134 struct cfg80211_connect_params *params;
135 struct cfg80211_assoc_request req = {};
136 int err;
137
138 ASSERT_WDEV_LOCK(wdev);
139
140 if (!wdev->conn)
141 return 0;
142
143 params = &wdev->conn->params;
144
145 switch (wdev->conn->state) {
146 case CFG80211_CONN_SCANNING:
147 /* didn't find it during scan ... */
148 return -ENOENT;
149 case CFG80211_CONN_SCAN_AGAIN:
150 return cfg80211_conn_scan(wdev);
151 case CFG80211_CONN_AUTHENTICATE_NEXT:
152 if (WARN_ON(!rdev->ops->auth))
153 return -EOPNOTSUPP;
154 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
155 return cfg80211_mlme_auth(rdev, wdev->netdev,
156 params->channel, params->auth_type,
157 params->bssid,
158 params->ssid, params->ssid_len,
159 NULL, 0,
160 params->key, params->key_len,
161 params->key_idx, NULL, 0);
162 case CFG80211_CONN_AUTH_FAILED:
163 return -ENOTCONN;
164 case CFG80211_CONN_ASSOCIATE_NEXT:
165 if (WARN_ON(!rdev->ops->assoc))
166 return -EOPNOTSUPP;
167 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
168 if (wdev->conn->prev_bssid_valid)
169 req.prev_bssid = wdev->conn->prev_bssid;
170 req.ie = params->ie;
171 req.ie_len = params->ie_len;
172 req.use_mfp = params->mfp != NL80211_MFP_NO;
173 req.crypto = params->crypto;
174 req.flags = params->flags;
175 req.ht_capa = params->ht_capa;
176 req.ht_capa_mask = params->ht_capa_mask;
177 req.vht_capa = params->vht_capa;
178 req.vht_capa_mask = params->vht_capa_mask;
179
180 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
181 params->bssid, params->ssid,
182 params->ssid_len, &req);
183 if (err)
184 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
185 NULL, 0,
186 WLAN_REASON_DEAUTH_LEAVING,
187 false);
188 return err;
189 case CFG80211_CONN_ASSOC_FAILED:
190 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
191 NULL, 0,
192 WLAN_REASON_DEAUTH_LEAVING, false);
193 return -ENOTCONN;
194 case CFG80211_CONN_DEAUTH:
195 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
196 NULL, 0,
197 WLAN_REASON_DEAUTH_LEAVING, false);
198 /* free directly, disconnected event already sent */
199 cfg80211_sme_free(wdev);
200 return 0;
201 default:
202 return 0;
203 }
204 }
205
cfg80211_conn_work(struct work_struct * work)206 void cfg80211_conn_work(struct work_struct *work)
207 {
208 struct cfg80211_registered_device *rdev =
209 container_of(work, struct cfg80211_registered_device, conn_work);
210 struct wireless_dev *wdev;
211 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
212
213 rtnl_lock();
214
215 list_for_each_entry(wdev, &rdev->wdev_list, list) {
216 if (!wdev->netdev)
217 continue;
218
219 wdev_lock(wdev);
220 if (!netif_running(wdev->netdev)) {
221 wdev_unlock(wdev);
222 continue;
223 }
224 if (!wdev->conn ||
225 wdev->conn->state == CFG80211_CONN_CONNECTED) {
226 wdev_unlock(wdev);
227 continue;
228 }
229 if (wdev->conn->params.bssid) {
230 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
231 bssid = bssid_buf;
232 }
233 if (cfg80211_conn_do_work(wdev)) {
234 __cfg80211_connect_result(
235 wdev->netdev, bssid,
236 NULL, 0, NULL, 0,
237 WLAN_STATUS_UNSPECIFIED_FAILURE,
238 false, NULL);
239 }
240 wdev_unlock(wdev);
241 }
242
243 rtnl_unlock();
244 }
245
246 /* Returned bss is reference counted and must be cleaned up appropriately. */
cfg80211_get_conn_bss(struct wireless_dev * wdev)247 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
248 {
249 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
250 struct cfg80211_bss *bss;
251 u16 capa = WLAN_CAPABILITY_ESS;
252
253 ASSERT_WDEV_LOCK(wdev);
254
255 if (wdev->conn->params.privacy)
256 capa |= WLAN_CAPABILITY_PRIVACY;
257
258 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
259 wdev->conn->params.bssid,
260 wdev->conn->params.ssid,
261 wdev->conn->params.ssid_len,
262 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
263 capa);
264 if (!bss)
265 return NULL;
266
267 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
268 wdev->conn->params.bssid = wdev->conn->bssid;
269 wdev->conn->params.channel = bss->channel;
270 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
271 schedule_work(&rdev->conn_work);
272
273 return bss;
274 }
275
__cfg80211_sme_scan_done(struct net_device * dev)276 static void __cfg80211_sme_scan_done(struct net_device *dev)
277 {
278 struct wireless_dev *wdev = dev->ieee80211_ptr;
279 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
280 struct cfg80211_bss *bss;
281
282 ASSERT_WDEV_LOCK(wdev);
283
284 if (!wdev->conn)
285 return;
286
287 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
288 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
289 return;
290
291 bss = cfg80211_get_conn_bss(wdev);
292 if (bss)
293 cfg80211_put_bss(&rdev->wiphy, bss);
294 else
295 schedule_work(&rdev->conn_work);
296 }
297
cfg80211_sme_scan_done(struct net_device * dev)298 void cfg80211_sme_scan_done(struct net_device *dev)
299 {
300 struct wireless_dev *wdev = dev->ieee80211_ptr;
301
302 wdev_lock(wdev);
303 __cfg80211_sme_scan_done(dev);
304 wdev_unlock(wdev);
305 }
306
cfg80211_sme_rx_auth(struct wireless_dev * wdev,const u8 * buf,size_t len)307 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
308 {
309 struct wiphy *wiphy = wdev->wiphy;
310 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
311 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
312 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
313
314 ASSERT_WDEV_LOCK(wdev);
315
316 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
317 return;
318
319 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
320 wdev->conn->auto_auth &&
321 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
322 /* select automatically between only open, shared, leap */
323 switch (wdev->conn->params.auth_type) {
324 case NL80211_AUTHTYPE_OPEN_SYSTEM:
325 if (wdev->connect_keys)
326 wdev->conn->params.auth_type =
327 NL80211_AUTHTYPE_SHARED_KEY;
328 else
329 wdev->conn->params.auth_type =
330 NL80211_AUTHTYPE_NETWORK_EAP;
331 break;
332 case NL80211_AUTHTYPE_SHARED_KEY:
333 wdev->conn->params.auth_type =
334 NL80211_AUTHTYPE_NETWORK_EAP;
335 break;
336 default:
337 /* huh? */
338 wdev->conn->params.auth_type =
339 NL80211_AUTHTYPE_OPEN_SYSTEM;
340 break;
341 }
342 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
343 schedule_work(&rdev->conn_work);
344 } else if (status_code != WLAN_STATUS_SUCCESS) {
345 __cfg80211_connect_result(wdev->netdev, mgmt->bssid,
346 NULL, 0, NULL, 0,
347 status_code, false, NULL);
348 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
349 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
350 schedule_work(&rdev->conn_work);
351 }
352 }
353
cfg80211_sme_rx_assoc_resp(struct wireless_dev * wdev,u16 status)354 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
355 {
356 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
357
358 if (!wdev->conn)
359 return false;
360
361 if (status == WLAN_STATUS_SUCCESS) {
362 wdev->conn->state = CFG80211_CONN_CONNECTED;
363 return false;
364 }
365
366 if (wdev->conn->prev_bssid_valid) {
367 /*
368 * Some stupid APs don't accept reassoc, so we
369 * need to fall back to trying regular assoc;
370 * return true so no event is sent to userspace.
371 */
372 wdev->conn->prev_bssid_valid = false;
373 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
374 schedule_work(&rdev->conn_work);
375 return true;
376 }
377
378 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
379 schedule_work(&rdev->conn_work);
380 return false;
381 }
382
cfg80211_sme_deauth(struct wireless_dev * wdev)383 void cfg80211_sme_deauth(struct wireless_dev *wdev)
384 {
385 cfg80211_sme_free(wdev);
386 }
387
cfg80211_sme_auth_timeout(struct wireless_dev * wdev)388 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
389 {
390 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
391
392 if (!wdev->conn)
393 return;
394
395 wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
396 schedule_work(&rdev->conn_work);
397 }
398
cfg80211_sme_disassoc(struct wireless_dev * wdev)399 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
400 {
401 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
402
403 if (!wdev->conn)
404 return;
405
406 wdev->conn->state = CFG80211_CONN_DEAUTH;
407 schedule_work(&rdev->conn_work);
408 }
409
cfg80211_sme_assoc_timeout(struct wireless_dev * wdev)410 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
411 {
412 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
413
414 if (!wdev->conn)
415 return;
416
417 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
418 schedule_work(&rdev->conn_work);
419 }
420
cfg80211_sme_connect(struct wireless_dev * wdev,struct cfg80211_connect_params * connect,const u8 * prev_bssid)421 static int cfg80211_sme_connect(struct wireless_dev *wdev,
422 struct cfg80211_connect_params *connect,
423 const u8 *prev_bssid)
424 {
425 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
426 struct cfg80211_bss *bss;
427 int err;
428
429 if (!rdev->ops->auth || !rdev->ops->assoc)
430 return -EOPNOTSUPP;
431
432 if (wdev->current_bss)
433 return -EALREADY;
434
435 if (WARN_ON(wdev->conn))
436 return -EINPROGRESS;
437
438 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
439 if (!wdev->conn)
440 return -ENOMEM;
441
442 /*
443 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
444 */
445 memcpy(&wdev->conn->params, connect, sizeof(*connect));
446 if (connect->bssid) {
447 wdev->conn->params.bssid = wdev->conn->bssid;
448 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
449 }
450
451 if (connect->ie) {
452 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
453 GFP_KERNEL);
454 wdev->conn->params.ie = wdev->conn->ie;
455 if (!wdev->conn->ie) {
456 kfree(wdev->conn);
457 wdev->conn = NULL;
458 return -ENOMEM;
459 }
460 }
461
462 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
463 wdev->conn->auto_auth = true;
464 /* start with open system ... should mostly work */
465 wdev->conn->params.auth_type =
466 NL80211_AUTHTYPE_OPEN_SYSTEM;
467 } else {
468 wdev->conn->auto_auth = false;
469 }
470
471 wdev->conn->params.ssid = wdev->ssid;
472 wdev->conn->params.ssid_len = wdev->ssid_len;
473
474 /* see if we have the bss already */
475 bss = cfg80211_get_conn_bss(wdev);
476
477 if (prev_bssid) {
478 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
479 wdev->conn->prev_bssid_valid = true;
480 }
481
482 /* we're good if we have a matching bss struct */
483 if (bss) {
484 err = cfg80211_conn_do_work(wdev);
485 cfg80211_put_bss(wdev->wiphy, bss);
486 } else {
487 /* otherwise we'll need to scan for the AP first */
488 err = cfg80211_conn_scan(wdev);
489
490 /*
491 * If we can't scan right now, then we need to scan again
492 * after the current scan finished, since the parameters
493 * changed (unless we find a good AP anyway).
494 */
495 if (err == -EBUSY) {
496 err = 0;
497 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
498 }
499 }
500
501 if (err)
502 cfg80211_sme_free(wdev);
503
504 return err;
505 }
506
cfg80211_sme_disconnect(struct wireless_dev * wdev,u16 reason)507 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
508 {
509 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
510 int err;
511
512 if (!wdev->conn)
513 return 0;
514
515 if (!rdev->ops->deauth)
516 return -EOPNOTSUPP;
517
518 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
519 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
520 err = 0;
521 goto out;
522 }
523
524 /* wdev->conn->params.bssid must be set if > SCANNING */
525 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
526 wdev->conn->params.bssid,
527 NULL, 0, reason, false);
528 out:
529 cfg80211_sme_free(wdev);
530 return err;
531 }
532
533 /*
534 * code shared for in-device and software SME
535 */
536
cfg80211_is_all_idle(void)537 static bool cfg80211_is_all_idle(void)
538 {
539 struct cfg80211_registered_device *rdev;
540 struct wireless_dev *wdev;
541 bool is_all_idle = true;
542
543 /*
544 * All devices must be idle as otherwise if you are actively
545 * scanning some new beacon hints could be learned and would
546 * count as new regulatory hints.
547 */
548 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
549 list_for_each_entry(wdev, &rdev->wdev_list, list) {
550 wdev_lock(wdev);
551 if (wdev->conn || wdev->current_bss)
552 is_all_idle = false;
553 wdev_unlock(wdev);
554 }
555 }
556
557 return is_all_idle;
558 }
559
disconnect_work(struct work_struct * work)560 static void disconnect_work(struct work_struct *work)
561 {
562 rtnl_lock();
563 if (cfg80211_is_all_idle())
564 regulatory_hint_disconnect();
565 rtnl_unlock();
566 }
567
568 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
569
570
571 /*
572 * API calls for drivers implementing connect/disconnect and
573 * SME event handling
574 */
575
576 /* This method must consume bss one way or another */
__cfg80211_connect_result(struct net_device * dev,const u8 * bssid,const u8 * req_ie,size_t req_ie_len,const u8 * resp_ie,size_t resp_ie_len,u16 status,bool wextev,struct cfg80211_bss * bss)577 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
578 const u8 *req_ie, size_t req_ie_len,
579 const u8 *resp_ie, size_t resp_ie_len,
580 u16 status, bool wextev,
581 struct cfg80211_bss *bss)
582 {
583 struct wireless_dev *wdev = dev->ieee80211_ptr;
584 const u8 *country_ie;
585 #ifdef CONFIG_CFG80211_WEXT
586 union iwreq_data wrqu;
587 #endif
588
589 ASSERT_WDEV_LOCK(wdev);
590
591 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
592 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
593 cfg80211_put_bss(wdev->wiphy, bss);
594 return;
595 }
596
597 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev,
598 bssid, req_ie, req_ie_len,
599 resp_ie, resp_ie_len,
600 status, GFP_KERNEL);
601
602 #ifdef CONFIG_CFG80211_WEXT
603 if (wextev) {
604 if (req_ie && status == WLAN_STATUS_SUCCESS) {
605 memset(&wrqu, 0, sizeof(wrqu));
606 wrqu.data.length = req_ie_len;
607 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
608 }
609
610 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
611 memset(&wrqu, 0, sizeof(wrqu));
612 wrqu.data.length = resp_ie_len;
613 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
614 }
615
616 memset(&wrqu, 0, sizeof(wrqu));
617 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
618 if (bssid && status == WLAN_STATUS_SUCCESS) {
619 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
620 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
621 wdev->wext.prev_bssid_valid = true;
622 }
623 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
624 }
625 #endif
626
627 if (!bss && (status == WLAN_STATUS_SUCCESS)) {
628 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
629 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
630 wdev->ssid, wdev->ssid_len,
631 WLAN_CAPABILITY_ESS,
632 WLAN_CAPABILITY_ESS);
633 if (bss)
634 cfg80211_hold_bss(bss_from_pub(bss));
635 }
636
637 if (wdev->current_bss) {
638 cfg80211_unhold_bss(wdev->current_bss);
639 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
640 wdev->current_bss = NULL;
641 }
642
643 if (status != WLAN_STATUS_SUCCESS) {
644 kzfree(wdev->connect_keys);
645 wdev->connect_keys = NULL;
646 wdev->ssid_len = 0;
647 if (bss) {
648 cfg80211_unhold_bss(bss_from_pub(bss));
649 cfg80211_put_bss(wdev->wiphy, bss);
650 }
651 cfg80211_sme_free(wdev);
652 return;
653 }
654
655 if (WARN_ON(!bss))
656 return;
657
658 wdev->current_bss = bss_from_pub(bss);
659
660 cfg80211_upload_connect_keys(wdev);
661
662 rcu_read_lock();
663 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
664 if (!country_ie) {
665 rcu_read_unlock();
666 return;
667 }
668
669 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
670 rcu_read_unlock();
671
672 if (!country_ie)
673 return;
674
675 /*
676 * ieee80211_bss_get_ie() ensures we can access:
677 * - country_ie + 2, the start of the country ie data, and
678 * - and country_ie[1] which is the IE length
679 */
680 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
681 country_ie + 2, country_ie[1]);
682 kfree(country_ie);
683 }
684
cfg80211_connect_result(struct net_device * dev,const u8 * bssid,const u8 * req_ie,size_t req_ie_len,const u8 * resp_ie,size_t resp_ie_len,u16 status,gfp_t gfp)685 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
686 const u8 *req_ie, size_t req_ie_len,
687 const u8 *resp_ie, size_t resp_ie_len,
688 u16 status, gfp_t gfp)
689 {
690 struct wireless_dev *wdev = dev->ieee80211_ptr;
691 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
692 struct cfg80211_event *ev;
693 unsigned long flags;
694
695 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
696 if (!ev)
697 return;
698
699 ev->type = EVENT_CONNECT_RESULT;
700 if (bssid)
701 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
702 if (req_ie_len) {
703 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
704 ev->cr.req_ie_len = req_ie_len;
705 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
706 }
707 if (resp_ie_len) {
708 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
709 ev->cr.resp_ie_len = resp_ie_len;
710 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
711 }
712 ev->cr.status = status;
713
714 spin_lock_irqsave(&wdev->event_lock, flags);
715 list_add_tail(&ev->list, &wdev->event_list);
716 spin_unlock_irqrestore(&wdev->event_lock, flags);
717 queue_work(cfg80211_wq, &rdev->event_work);
718 }
719 EXPORT_SYMBOL(cfg80211_connect_result);
720
721 /* Consumes bss object one way or another */
__cfg80211_roamed(struct wireless_dev * wdev,struct cfg80211_bss * bss,const u8 * req_ie,size_t req_ie_len,const u8 * resp_ie,size_t resp_ie_len)722 void __cfg80211_roamed(struct wireless_dev *wdev,
723 struct cfg80211_bss *bss,
724 const u8 *req_ie, size_t req_ie_len,
725 const u8 *resp_ie, size_t resp_ie_len)
726 {
727 #ifdef CONFIG_CFG80211_WEXT
728 union iwreq_data wrqu;
729 #endif
730 ASSERT_WDEV_LOCK(wdev);
731
732 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
733 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
734 goto out;
735
736 if (WARN_ON(!wdev->current_bss))
737 goto out;
738
739 cfg80211_unhold_bss(wdev->current_bss);
740 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
741 wdev->current_bss = NULL;
742
743 cfg80211_hold_bss(bss_from_pub(bss));
744 wdev->current_bss = bss_from_pub(bss);
745
746 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
747 wdev->netdev, bss->bssid,
748 req_ie, req_ie_len, resp_ie, resp_ie_len,
749 GFP_KERNEL);
750
751 #ifdef CONFIG_CFG80211_WEXT
752 if (req_ie) {
753 memset(&wrqu, 0, sizeof(wrqu));
754 wrqu.data.length = req_ie_len;
755 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
756 &wrqu, req_ie);
757 }
758
759 if (resp_ie) {
760 memset(&wrqu, 0, sizeof(wrqu));
761 wrqu.data.length = resp_ie_len;
762 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
763 &wrqu, resp_ie);
764 }
765
766 memset(&wrqu, 0, sizeof(wrqu));
767 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
768 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
769 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
770 wdev->wext.prev_bssid_valid = true;
771 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
772 #endif
773
774 return;
775 out:
776 cfg80211_put_bss(wdev->wiphy, bss);
777 }
778
cfg80211_roamed(struct net_device * dev,struct ieee80211_channel * channel,const u8 * bssid,const u8 * req_ie,size_t req_ie_len,const u8 * resp_ie,size_t resp_ie_len,gfp_t gfp)779 void cfg80211_roamed(struct net_device *dev,
780 struct ieee80211_channel *channel,
781 const u8 *bssid,
782 const u8 *req_ie, size_t req_ie_len,
783 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
784 {
785 struct wireless_dev *wdev = dev->ieee80211_ptr;
786 struct cfg80211_bss *bss;
787
788 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
789 wdev->ssid_len, WLAN_CAPABILITY_ESS,
790 WLAN_CAPABILITY_ESS);
791 if (WARN_ON(!bss))
792 return;
793
794 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
795 resp_ie_len, gfp);
796 }
797 EXPORT_SYMBOL(cfg80211_roamed);
798
799 /* Consumes bss object one way or another */
cfg80211_roamed_bss(struct net_device * dev,struct cfg80211_bss * bss,const u8 * req_ie,size_t req_ie_len,const u8 * resp_ie,size_t resp_ie_len,gfp_t gfp)800 void cfg80211_roamed_bss(struct net_device *dev,
801 struct cfg80211_bss *bss, const u8 *req_ie,
802 size_t req_ie_len, const u8 *resp_ie,
803 size_t resp_ie_len, gfp_t gfp)
804 {
805 struct wireless_dev *wdev = dev->ieee80211_ptr;
806 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
807 struct cfg80211_event *ev;
808 unsigned long flags;
809
810 if (WARN_ON(!bss))
811 return;
812
813 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
814 if (!ev) {
815 cfg80211_put_bss(wdev->wiphy, bss);
816 return;
817 }
818
819 ev->type = EVENT_ROAMED;
820 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
821 ev->rm.req_ie_len = req_ie_len;
822 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
823 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
824 ev->rm.resp_ie_len = resp_ie_len;
825 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
826 ev->rm.bss = bss;
827
828 spin_lock_irqsave(&wdev->event_lock, flags);
829 list_add_tail(&ev->list, &wdev->event_list);
830 spin_unlock_irqrestore(&wdev->event_lock, flags);
831 queue_work(cfg80211_wq, &rdev->event_work);
832 }
833 EXPORT_SYMBOL(cfg80211_roamed_bss);
834
__cfg80211_disconnected(struct net_device * dev,const u8 * ie,size_t ie_len,u16 reason,bool from_ap)835 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
836 size_t ie_len, u16 reason, bool from_ap)
837 {
838 struct wireless_dev *wdev = dev->ieee80211_ptr;
839 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
840 int i;
841 #ifdef CONFIG_CFG80211_WEXT
842 union iwreq_data wrqu;
843 #endif
844
845 ASSERT_WDEV_LOCK(wdev);
846
847 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
848 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
849 return;
850
851 if (wdev->current_bss) {
852 cfg80211_unhold_bss(wdev->current_bss);
853 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
854 }
855
856 wdev->current_bss = NULL;
857 wdev->ssid_len = 0;
858
859 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
860
861 /*
862 * Delete all the keys ... pairwise keys can't really
863 * exist any more anyway, but default keys might.
864 */
865 if (rdev->ops->del_key)
866 for (i = 0; i < 6; i++)
867 rdev_del_key(rdev, dev, i, false, NULL);
868
869 rdev_set_qos_map(rdev, dev, NULL);
870
871 #ifdef CONFIG_CFG80211_WEXT
872 memset(&wrqu, 0, sizeof(wrqu));
873 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
874 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
875 wdev->wext.connect.ssid_len = 0;
876 #endif
877
878 schedule_work(&cfg80211_disconnect_work);
879 }
880
cfg80211_disconnected(struct net_device * dev,u16 reason,const u8 * ie,size_t ie_len,gfp_t gfp)881 void cfg80211_disconnected(struct net_device *dev, u16 reason,
882 const u8 *ie, size_t ie_len, gfp_t gfp)
883 {
884 struct wireless_dev *wdev = dev->ieee80211_ptr;
885 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
886 struct cfg80211_event *ev;
887 unsigned long flags;
888
889 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
890 if (!ev)
891 return;
892
893 ev->type = EVENT_DISCONNECTED;
894 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
895 ev->dc.ie_len = ie_len;
896 memcpy((void *)ev->dc.ie, ie, ie_len);
897 ev->dc.reason = reason;
898
899 spin_lock_irqsave(&wdev->event_lock, flags);
900 list_add_tail(&ev->list, &wdev->event_list);
901 spin_unlock_irqrestore(&wdev->event_lock, flags);
902 queue_work(cfg80211_wq, &rdev->event_work);
903 }
904 EXPORT_SYMBOL(cfg80211_disconnected);
905
906 /*
907 * API calls for nl80211/wext compatibility code
908 */
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)909 int cfg80211_connect(struct cfg80211_registered_device *rdev,
910 struct net_device *dev,
911 struct cfg80211_connect_params *connect,
912 struct cfg80211_cached_keys *connkeys,
913 const u8 *prev_bssid)
914 {
915 struct wireless_dev *wdev = dev->ieee80211_ptr;
916 int err;
917
918 ASSERT_WDEV_LOCK(wdev);
919
920 if (WARN_ON(wdev->connect_keys)) {
921 kzfree(wdev->connect_keys);
922 wdev->connect_keys = NULL;
923 }
924
925 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
926 rdev->wiphy.ht_capa_mod_mask);
927
928 if (connkeys && connkeys->def >= 0) {
929 int idx;
930 u32 cipher;
931
932 idx = connkeys->def;
933 cipher = connkeys->params[idx].cipher;
934 /* If given a WEP key we may need it for shared key auth */
935 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
936 cipher == WLAN_CIPHER_SUITE_WEP104) {
937 connect->key_idx = idx;
938 connect->key = connkeys->params[idx].key;
939 connect->key_len = connkeys->params[idx].key_len;
940
941 /*
942 * If ciphers are not set (e.g. when going through
943 * iwconfig), we have to set them appropriately here.
944 */
945 if (connect->crypto.cipher_group == 0)
946 connect->crypto.cipher_group = cipher;
947
948 if (connect->crypto.n_ciphers_pairwise == 0) {
949 connect->crypto.n_ciphers_pairwise = 1;
950 connect->crypto.ciphers_pairwise[0] = cipher;
951 }
952 }
953 }
954
955 wdev->connect_keys = connkeys;
956 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
957 wdev->ssid_len = connect->ssid_len;
958
959 if (!rdev->ops->connect)
960 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
961 else
962 err = rdev_connect(rdev, dev, connect);
963
964 if (err) {
965 wdev->connect_keys = NULL;
966 wdev->ssid_len = 0;
967 return err;
968 }
969
970 return 0;
971 }
972
cfg80211_disconnect(struct cfg80211_registered_device * rdev,struct net_device * dev,u16 reason,bool wextev)973 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
974 struct net_device *dev, u16 reason, bool wextev)
975 {
976 struct wireless_dev *wdev = dev->ieee80211_ptr;
977 int err = 0;
978
979 ASSERT_WDEV_LOCK(wdev);
980
981 kzfree(wdev->connect_keys);
982 wdev->connect_keys = NULL;
983
984 if (wdev->conn)
985 err = cfg80211_sme_disconnect(wdev, reason);
986 else if (!rdev->ops->disconnect)
987 cfg80211_mlme_down(rdev, dev);
988 else if (wdev->current_bss)
989 err = rdev_disconnect(rdev, dev, reason);
990
991 return err;
992 }
993