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cfg80211: remove enum ieee80211_band
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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 const u8 *ie;
46 size_t ie_len;
47 bool auto_auth, prev_bssid_valid;
48 };
49
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
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 enum nl80211_band band = wdev->conn->params.channel->band;
85 struct ieee80211_supported_band *sband =
86 wdev->wiphy->bands[band];
87
88 if (!sband) {
89 kfree(request);
90 return -EINVAL;
91 }
92 request->channels[0] = wdev->conn->params.channel;
93 request->rates[band] = (1 << sband->n_bitrates) - 1;
94 } else {
95 int i = 0, j;
96 enum nl80211_band band;
97 struct ieee80211_supported_band *bands;
98 struct ieee80211_channel *channel;
99
100 for (band = 0; band < NUM_NL80211_BANDS; band++) {
101 bands = wdev->wiphy->bands[band];
102 if (!bands)
103 continue;
104 for (j = 0; j < bands->n_channels; j++) {
105 channel = &bands->channels[j];
106 if (channel->flags & IEEE80211_CHAN_DISABLED)
107 continue;
108 request->channels[i++] = channel;
109 }
110 request->rates[band] = (1 << bands->n_bitrates) - 1;
111 }
112 n_channels = i;
113 }
114 request->n_channels = n_channels;
115 request->ssids = (void *)&request->channels[n_channels];
116 request->n_ssids = 1;
117
118 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
119 wdev->conn->params.ssid_len);
120 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
121
122 eth_broadcast_addr(request->bssid);
123
124 request->wdev = wdev;
125 request->wiphy = &rdev->wiphy;
126 request->scan_start = jiffies;
127
128 rdev->scan_req = request;
129
130 err = rdev_scan(rdev, request);
131 if (!err) {
132 wdev->conn->state = CFG80211_CONN_SCANNING;
133 nl80211_send_scan_start(rdev, wdev);
134 dev_hold(wdev->netdev);
135 } else {
136 rdev->scan_req = NULL;
137 kfree(request);
138 }
139 return err;
140 }
141
142 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
143 {
144 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
145 struct cfg80211_connect_params *params;
146 struct cfg80211_assoc_request req = {};
147 int err;
148
149 ASSERT_WDEV_LOCK(wdev);
150
151 if (!wdev->conn)
152 return 0;
153
154 params = &wdev->conn->params;
155
156 switch (wdev->conn->state) {
157 case CFG80211_CONN_SCANNING:
158 /* didn't find it during scan ... */
159 return -ENOENT;
160 case CFG80211_CONN_SCAN_AGAIN:
161 return cfg80211_conn_scan(wdev);
162 case CFG80211_CONN_AUTHENTICATE_NEXT:
163 if (WARN_ON(!rdev->ops->auth))
164 return -EOPNOTSUPP;
165 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
166 return cfg80211_mlme_auth(rdev, wdev->netdev,
167 params->channel, params->auth_type,
168 params->bssid,
169 params->ssid, params->ssid_len,
170 NULL, 0,
171 params->key, params->key_len,
172 params->key_idx, NULL, 0);
173 case CFG80211_CONN_AUTH_FAILED:
174 return -ENOTCONN;
175 case CFG80211_CONN_ASSOCIATE_NEXT:
176 if (WARN_ON(!rdev->ops->assoc))
177 return -EOPNOTSUPP;
178 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
179 if (wdev->conn->prev_bssid_valid)
180 req.prev_bssid = wdev->conn->prev_bssid;
181 req.ie = params->ie;
182 req.ie_len = params->ie_len;
183 req.use_mfp = params->mfp != NL80211_MFP_NO;
184 req.crypto = params->crypto;
185 req.flags = params->flags;
186 req.ht_capa = params->ht_capa;
187 req.ht_capa_mask = params->ht_capa_mask;
188 req.vht_capa = params->vht_capa;
189 req.vht_capa_mask = params->vht_capa_mask;
190
191 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
192 params->bssid, params->ssid,
193 params->ssid_len, &req);
194 if (err)
195 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
196 NULL, 0,
197 WLAN_REASON_DEAUTH_LEAVING,
198 false);
199 return err;
200 case CFG80211_CONN_ASSOC_FAILED:
201 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
202 NULL, 0,
203 WLAN_REASON_DEAUTH_LEAVING, false);
204 return -ENOTCONN;
205 case CFG80211_CONN_DEAUTH:
206 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
207 NULL, 0,
208 WLAN_REASON_DEAUTH_LEAVING, false);
209 /* free directly, disconnected event already sent */
210 cfg80211_sme_free(wdev);
211 return 0;
212 default:
213 return 0;
214 }
215 }
216
217 void cfg80211_conn_work(struct work_struct *work)
218 {
219 struct cfg80211_registered_device *rdev =
220 container_of(work, struct cfg80211_registered_device, conn_work);
221 struct wireless_dev *wdev;
222 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
223
224 rtnl_lock();
225
226 list_for_each_entry(wdev, &rdev->wdev_list, list) {
227 if (!wdev->netdev)
228 continue;
229
230 wdev_lock(wdev);
231 if (!netif_running(wdev->netdev)) {
232 wdev_unlock(wdev);
233 continue;
234 }
235 if (!wdev->conn ||
236 wdev->conn->state == CFG80211_CONN_CONNECTED) {
237 wdev_unlock(wdev);
238 continue;
239 }
240 if (wdev->conn->params.bssid) {
241 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
242 bssid = bssid_buf;
243 }
244 if (cfg80211_conn_do_work(wdev)) {
245 __cfg80211_connect_result(
246 wdev->netdev, bssid,
247 NULL, 0, NULL, 0,
248 WLAN_STATUS_UNSPECIFIED_FAILURE,
249 false, NULL);
250 }
251 wdev_unlock(wdev);
252 }
253
254 rtnl_unlock();
255 }
256
257 /* Returned bss is reference counted and must be cleaned up appropriately. */
258 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
259 {
260 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
261 struct cfg80211_bss *bss;
262
263 ASSERT_WDEV_LOCK(wdev);
264
265 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
266 wdev->conn->params.bssid,
267 wdev->conn->params.ssid,
268 wdev->conn->params.ssid_len,
269 wdev->conn_bss_type,
270 IEEE80211_PRIVACY(wdev->conn->params.privacy));
271 if (!bss)
272 return NULL;
273
274 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
275 wdev->conn->params.bssid = wdev->conn->bssid;
276 wdev->conn->params.channel = bss->channel;
277 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
278 schedule_work(&rdev->conn_work);
279
280 return bss;
281 }
282
283 static void __cfg80211_sme_scan_done(struct net_device *dev)
284 {
285 struct wireless_dev *wdev = dev->ieee80211_ptr;
286 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
287 struct cfg80211_bss *bss;
288
289 ASSERT_WDEV_LOCK(wdev);
290
291 if (!wdev->conn)
292 return;
293
294 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
295 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
296 return;
297
298 bss = cfg80211_get_conn_bss(wdev);
299 if (bss)
300 cfg80211_put_bss(&rdev->wiphy, bss);
301 else
302 schedule_work(&rdev->conn_work);
303 }
304
305 void cfg80211_sme_scan_done(struct net_device *dev)
306 {
307 struct wireless_dev *wdev = dev->ieee80211_ptr;
308
309 wdev_lock(wdev);
310 __cfg80211_sme_scan_done(dev);
311 wdev_unlock(wdev);
312 }
313
314 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
315 {
316 struct wiphy *wiphy = wdev->wiphy;
317 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
318 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
319 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
320
321 ASSERT_WDEV_LOCK(wdev);
322
323 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
324 return;
325
326 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
327 wdev->conn->auto_auth &&
328 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
329 /* select automatically between only open, shared, leap */
330 switch (wdev->conn->params.auth_type) {
331 case NL80211_AUTHTYPE_OPEN_SYSTEM:
332 if (wdev->connect_keys)
333 wdev->conn->params.auth_type =
334 NL80211_AUTHTYPE_SHARED_KEY;
335 else
336 wdev->conn->params.auth_type =
337 NL80211_AUTHTYPE_NETWORK_EAP;
338 break;
339 case NL80211_AUTHTYPE_SHARED_KEY:
340 wdev->conn->params.auth_type =
341 NL80211_AUTHTYPE_NETWORK_EAP;
342 break;
343 default:
344 /* huh? */
345 wdev->conn->params.auth_type =
346 NL80211_AUTHTYPE_OPEN_SYSTEM;
347 break;
348 }
349 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
350 schedule_work(&rdev->conn_work);
351 } else if (status_code != WLAN_STATUS_SUCCESS) {
352 __cfg80211_connect_result(wdev->netdev, mgmt->bssid,
353 NULL, 0, NULL, 0,
354 status_code, false, NULL);
355 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
356 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
357 schedule_work(&rdev->conn_work);
358 }
359 }
360
361 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
362 {
363 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
364
365 if (!wdev->conn)
366 return false;
367
368 if (status == WLAN_STATUS_SUCCESS) {
369 wdev->conn->state = CFG80211_CONN_CONNECTED;
370 return false;
371 }
372
373 if (wdev->conn->prev_bssid_valid) {
374 /*
375 * Some stupid APs don't accept reassoc, so we
376 * need to fall back to trying regular assoc;
377 * return true so no event is sent to userspace.
378 */
379 wdev->conn->prev_bssid_valid = false;
380 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
381 schedule_work(&rdev->conn_work);
382 return true;
383 }
384
385 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
386 schedule_work(&rdev->conn_work);
387 return false;
388 }
389
390 void cfg80211_sme_deauth(struct wireless_dev *wdev)
391 {
392 cfg80211_sme_free(wdev);
393 }
394
395 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
396 {
397 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
398
399 if (!wdev->conn)
400 return;
401
402 wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
403 schedule_work(&rdev->conn_work);
404 }
405
406 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
407 {
408 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
409
410 if (!wdev->conn)
411 return;
412
413 wdev->conn->state = CFG80211_CONN_DEAUTH;
414 schedule_work(&rdev->conn_work);
415 }
416
417 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
418 {
419 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
420
421 if (!wdev->conn)
422 return;
423
424 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
425 schedule_work(&rdev->conn_work);
426 }
427
428 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
429 const u8 *ies, size_t ies_len,
430 const u8 **out_ies, size_t *out_ies_len)
431 {
432 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
433 u8 *buf;
434 size_t offs;
435
436 if (!rdev->wiphy.extended_capabilities_len ||
437 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
438 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
439 if (!*out_ies)
440 return -ENOMEM;
441 *out_ies_len = ies_len;
442 return 0;
443 }
444
445 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
446 GFP_KERNEL);
447 if (!buf)
448 return -ENOMEM;
449
450 if (ies_len) {
451 static const u8 before_extcapa[] = {
452 /* not listing IEs expected to be created by driver */
453 WLAN_EID_RSN,
454 WLAN_EID_QOS_CAPA,
455 WLAN_EID_RRM_ENABLED_CAPABILITIES,
456 WLAN_EID_MOBILITY_DOMAIN,
457 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
458 WLAN_EID_BSS_COEX_2040,
459 };
460
461 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
462 ARRAY_SIZE(before_extcapa), 0);
463 memcpy(buf, ies, offs);
464 /* leave a whole for extended capabilities IE */
465 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
466 ies + offs, ies_len - offs);
467 } else {
468 offs = 0;
469 }
470
471 /* place extended capabilities IE (with only driver capabilities) */
472 buf[offs] = WLAN_EID_EXT_CAPABILITY;
473 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
474 memcpy(buf + offs + 2,
475 rdev->wiphy.extended_capabilities,
476 rdev->wiphy.extended_capabilities_len);
477
478 *out_ies = buf;
479 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
480
481 return 0;
482 }
483
484 static int cfg80211_sme_connect(struct wireless_dev *wdev,
485 struct cfg80211_connect_params *connect,
486 const u8 *prev_bssid)
487 {
488 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
489 struct cfg80211_bss *bss;
490 int err;
491
492 if (!rdev->ops->auth || !rdev->ops->assoc)
493 return -EOPNOTSUPP;
494
495 if (wdev->current_bss) {
496 if (!prev_bssid)
497 return -EALREADY;
498 if (prev_bssid &&
499 !ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
500 return -ENOTCONN;
501 cfg80211_unhold_bss(wdev->current_bss);
502 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
503 wdev->current_bss = NULL;
504
505 cfg80211_sme_free(wdev);
506 }
507
508 if (WARN_ON(wdev->conn))
509 return -EINPROGRESS;
510
511 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
512 if (!wdev->conn)
513 return -ENOMEM;
514
515 /*
516 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
517 */
518 memcpy(&wdev->conn->params, connect, sizeof(*connect));
519 if (connect->bssid) {
520 wdev->conn->params.bssid = wdev->conn->bssid;
521 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
522 }
523
524 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
525 &wdev->conn->ie,
526 &wdev->conn->params.ie_len)) {
527 kfree(wdev->conn);
528 wdev->conn = NULL;
529 return -ENOMEM;
530 }
531 wdev->conn->params.ie = wdev->conn->ie;
532
533 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
534 wdev->conn->auto_auth = true;
535 /* start with open system ... should mostly work */
536 wdev->conn->params.auth_type =
537 NL80211_AUTHTYPE_OPEN_SYSTEM;
538 } else {
539 wdev->conn->auto_auth = false;
540 }
541
542 wdev->conn->params.ssid = wdev->ssid;
543 wdev->conn->params.ssid_len = wdev->ssid_len;
544
545 /* see if we have the bss already */
546 bss = cfg80211_get_conn_bss(wdev);
547
548 if (prev_bssid) {
549 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
550 wdev->conn->prev_bssid_valid = true;
551 }
552
553 /* we're good if we have a matching bss struct */
554 if (bss) {
555 err = cfg80211_conn_do_work(wdev);
556 cfg80211_put_bss(wdev->wiphy, bss);
557 } else {
558 /* otherwise we'll need to scan for the AP first */
559 err = cfg80211_conn_scan(wdev);
560
561 /*
562 * If we can't scan right now, then we need to scan again
563 * after the current scan finished, since the parameters
564 * changed (unless we find a good AP anyway).
565 */
566 if (err == -EBUSY) {
567 err = 0;
568 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
569 }
570 }
571
572 if (err)
573 cfg80211_sme_free(wdev);
574
575 return err;
576 }
577
578 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
579 {
580 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
581 int err;
582
583 if (!wdev->conn)
584 return 0;
585
586 if (!rdev->ops->deauth)
587 return -EOPNOTSUPP;
588
589 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
590 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
591 err = 0;
592 goto out;
593 }
594
595 /* wdev->conn->params.bssid must be set if > SCANNING */
596 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
597 wdev->conn->params.bssid,
598 NULL, 0, reason, false);
599 out:
600 cfg80211_sme_free(wdev);
601 return err;
602 }
603
604 /*
605 * code shared for in-device and software SME
606 */
607
608 static bool cfg80211_is_all_idle(void)
609 {
610 struct cfg80211_registered_device *rdev;
611 struct wireless_dev *wdev;
612 bool is_all_idle = true;
613
614 /*
615 * All devices must be idle as otherwise if you are actively
616 * scanning some new beacon hints could be learned and would
617 * count as new regulatory hints.
618 */
619 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
620 list_for_each_entry(wdev, &rdev->wdev_list, list) {
621 wdev_lock(wdev);
622 if (wdev->conn || wdev->current_bss)
623 is_all_idle = false;
624 wdev_unlock(wdev);
625 }
626 }
627
628 return is_all_idle;
629 }
630
631 static void disconnect_work(struct work_struct *work)
632 {
633 rtnl_lock();
634 if (cfg80211_is_all_idle())
635 regulatory_hint_disconnect();
636 rtnl_unlock();
637 }
638
639 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
640
641
642 /*
643 * API calls for drivers implementing connect/disconnect and
644 * SME event handling
645 */
646
647 /* This method must consume bss one way or another */
648 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
649 const u8 *req_ie, size_t req_ie_len,
650 const u8 *resp_ie, size_t resp_ie_len,
651 u16 status, bool wextev,
652 struct cfg80211_bss *bss)
653 {
654 struct wireless_dev *wdev = dev->ieee80211_ptr;
655 const u8 *country_ie;
656 #ifdef CONFIG_CFG80211_WEXT
657 union iwreq_data wrqu;
658 #endif
659
660 ASSERT_WDEV_LOCK(wdev);
661
662 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
663 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
664 cfg80211_put_bss(wdev->wiphy, bss);
665 return;
666 }
667
668 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev,
669 bssid, req_ie, req_ie_len,
670 resp_ie, resp_ie_len,
671 status, GFP_KERNEL);
672
673 #ifdef CONFIG_CFG80211_WEXT
674 if (wextev) {
675 if (req_ie && status == WLAN_STATUS_SUCCESS) {
676 memset(&wrqu, 0, sizeof(wrqu));
677 wrqu.data.length = req_ie_len;
678 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
679 }
680
681 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
682 memset(&wrqu, 0, sizeof(wrqu));
683 wrqu.data.length = resp_ie_len;
684 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
685 }
686
687 memset(&wrqu, 0, sizeof(wrqu));
688 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
689 if (bssid && status == WLAN_STATUS_SUCCESS) {
690 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
691 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
692 wdev->wext.prev_bssid_valid = true;
693 }
694 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
695 }
696 #endif
697
698 if (!bss && (status == WLAN_STATUS_SUCCESS)) {
699 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
700 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
701 wdev->ssid, wdev->ssid_len,
702 wdev->conn_bss_type,
703 IEEE80211_PRIVACY_ANY);
704 if (bss)
705 cfg80211_hold_bss(bss_from_pub(bss));
706 }
707
708 if (wdev->current_bss) {
709 cfg80211_unhold_bss(wdev->current_bss);
710 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
711 wdev->current_bss = NULL;
712 }
713
714 if (status != WLAN_STATUS_SUCCESS) {
715 kzfree(wdev->connect_keys);
716 wdev->connect_keys = NULL;
717 wdev->ssid_len = 0;
718 if (bss) {
719 cfg80211_unhold_bss(bss_from_pub(bss));
720 cfg80211_put_bss(wdev->wiphy, bss);
721 }
722 cfg80211_sme_free(wdev);
723 return;
724 }
725
726 if (WARN_ON(!bss))
727 return;
728
729 wdev->current_bss = bss_from_pub(bss);
730
731 cfg80211_upload_connect_keys(wdev);
732
733 rcu_read_lock();
734 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
735 if (!country_ie) {
736 rcu_read_unlock();
737 return;
738 }
739
740 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
741 rcu_read_unlock();
742
743 if (!country_ie)
744 return;
745
746 /*
747 * ieee80211_bss_get_ie() ensures we can access:
748 * - country_ie + 2, the start of the country ie data, and
749 * - and country_ie[1] which is the IE length
750 */
751 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
752 country_ie + 2, country_ie[1]);
753 kfree(country_ie);
754 }
755
756 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
757 const u8 *req_ie, size_t req_ie_len,
758 const u8 *resp_ie, size_t resp_ie_len,
759 u16 status, gfp_t gfp)
760 {
761 struct wireless_dev *wdev = dev->ieee80211_ptr;
762 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
763 struct cfg80211_event *ev;
764 unsigned long flags;
765
766 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
767 if (!ev)
768 return;
769
770 ev->type = EVENT_CONNECT_RESULT;
771 if (bssid)
772 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
773 if (req_ie_len) {
774 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
775 ev->cr.req_ie_len = req_ie_len;
776 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
777 }
778 if (resp_ie_len) {
779 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
780 ev->cr.resp_ie_len = resp_ie_len;
781 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
782 }
783 ev->cr.status = status;
784
785 spin_lock_irqsave(&wdev->event_lock, flags);
786 list_add_tail(&ev->list, &wdev->event_list);
787 spin_unlock_irqrestore(&wdev->event_lock, flags);
788 queue_work(cfg80211_wq, &rdev->event_work);
789 }
790 EXPORT_SYMBOL(cfg80211_connect_result);
791
792 /* Consumes bss object one way or another */
793 void __cfg80211_roamed(struct wireless_dev *wdev,
794 struct cfg80211_bss *bss,
795 const u8 *req_ie, size_t req_ie_len,
796 const u8 *resp_ie, size_t resp_ie_len)
797 {
798 #ifdef CONFIG_CFG80211_WEXT
799 union iwreq_data wrqu;
800 #endif
801 ASSERT_WDEV_LOCK(wdev);
802
803 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
804 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
805 goto out;
806
807 if (WARN_ON(!wdev->current_bss))
808 goto out;
809
810 cfg80211_unhold_bss(wdev->current_bss);
811 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
812 wdev->current_bss = NULL;
813
814 cfg80211_hold_bss(bss_from_pub(bss));
815 wdev->current_bss = bss_from_pub(bss);
816
817 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
818 wdev->netdev, bss->bssid,
819 req_ie, req_ie_len, resp_ie, resp_ie_len,
820 GFP_KERNEL);
821
822 #ifdef CONFIG_CFG80211_WEXT
823 if (req_ie) {
824 memset(&wrqu, 0, sizeof(wrqu));
825 wrqu.data.length = req_ie_len;
826 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
827 &wrqu, req_ie);
828 }
829
830 if (resp_ie) {
831 memset(&wrqu, 0, sizeof(wrqu));
832 wrqu.data.length = resp_ie_len;
833 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
834 &wrqu, resp_ie);
835 }
836
837 memset(&wrqu, 0, sizeof(wrqu));
838 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
839 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
840 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
841 wdev->wext.prev_bssid_valid = true;
842 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
843 #endif
844
845 return;
846 out:
847 cfg80211_put_bss(wdev->wiphy, bss);
848 }
849
850 void cfg80211_roamed(struct net_device *dev,
851 struct ieee80211_channel *channel,
852 const u8 *bssid,
853 const u8 *req_ie, size_t req_ie_len,
854 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
855 {
856 struct wireless_dev *wdev = dev->ieee80211_ptr;
857 struct cfg80211_bss *bss;
858
859 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
860 wdev->ssid_len,
861 wdev->conn_bss_type, IEEE80211_PRIVACY_ANY);
862 if (WARN_ON(!bss))
863 return;
864
865 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
866 resp_ie_len, gfp);
867 }
868 EXPORT_SYMBOL(cfg80211_roamed);
869
870 /* Consumes bss object one way or another */
871 void cfg80211_roamed_bss(struct net_device *dev,
872 struct cfg80211_bss *bss, const u8 *req_ie,
873 size_t req_ie_len, const u8 *resp_ie,
874 size_t resp_ie_len, gfp_t gfp)
875 {
876 struct wireless_dev *wdev = dev->ieee80211_ptr;
877 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
878 struct cfg80211_event *ev;
879 unsigned long flags;
880
881 if (WARN_ON(!bss))
882 return;
883
884 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
885 if (!ev) {
886 cfg80211_put_bss(wdev->wiphy, bss);
887 return;
888 }
889
890 ev->type = EVENT_ROAMED;
891 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
892 ev->rm.req_ie_len = req_ie_len;
893 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
894 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
895 ev->rm.resp_ie_len = resp_ie_len;
896 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
897 ev->rm.bss = bss;
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_roamed_bss);
905
906 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
907 size_t ie_len, u16 reason, bool from_ap)
908 {
909 struct wireless_dev *wdev = dev->ieee80211_ptr;
910 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
911 int i;
912 #ifdef CONFIG_CFG80211_WEXT
913 union iwreq_data wrqu;
914 #endif
915
916 ASSERT_WDEV_LOCK(wdev);
917
918 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
919 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
920 return;
921
922 if (wdev->current_bss) {
923 cfg80211_unhold_bss(wdev->current_bss);
924 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
925 }
926
927 wdev->current_bss = NULL;
928 wdev->ssid_len = 0;
929
930 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
931
932 /* stop critical protocol if supported */
933 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
934 rdev->crit_proto_nlportid = 0;
935 rdev_crit_proto_stop(rdev, wdev);
936 }
937
938 /*
939 * Delete all the keys ... pairwise keys can't really
940 * exist any more anyway, but default keys might.
941 */
942 if (rdev->ops->del_key)
943 for (i = 0; i < 6; i++)
944 rdev_del_key(rdev, dev, i, false, NULL);
945
946 rdev_set_qos_map(rdev, dev, NULL);
947
948 #ifdef CONFIG_CFG80211_WEXT
949 memset(&wrqu, 0, sizeof(wrqu));
950 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
951 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
952 wdev->wext.connect.ssid_len = 0;
953 #endif
954
955 schedule_work(&cfg80211_disconnect_work);
956 }
957
958 void cfg80211_disconnected(struct net_device *dev, u16 reason,
959 const u8 *ie, size_t ie_len,
960 bool locally_generated, gfp_t gfp)
961 {
962 struct wireless_dev *wdev = dev->ieee80211_ptr;
963 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
964 struct cfg80211_event *ev;
965 unsigned long flags;
966
967 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
968 if (!ev)
969 return;
970
971 ev->type = EVENT_DISCONNECTED;
972 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
973 ev->dc.ie_len = ie_len;
974 memcpy((void *)ev->dc.ie, ie, ie_len);
975 ev->dc.reason = reason;
976 ev->dc.locally_generated = locally_generated;
977
978 spin_lock_irqsave(&wdev->event_lock, flags);
979 list_add_tail(&ev->list, &wdev->event_list);
980 spin_unlock_irqrestore(&wdev->event_lock, flags);
981 queue_work(cfg80211_wq, &rdev->event_work);
982 }
983 EXPORT_SYMBOL(cfg80211_disconnected);
984
985 /*
986 * API calls for nl80211/wext compatibility code
987 */
988 int cfg80211_connect(struct cfg80211_registered_device *rdev,
989 struct net_device *dev,
990 struct cfg80211_connect_params *connect,
991 struct cfg80211_cached_keys *connkeys,
992 const u8 *prev_bssid)
993 {
994 struct wireless_dev *wdev = dev->ieee80211_ptr;
995 int err;
996
997 ASSERT_WDEV_LOCK(wdev);
998
999 if (WARN_ON(wdev->connect_keys)) {
1000 kzfree(wdev->connect_keys);
1001 wdev->connect_keys = NULL;
1002 }
1003
1004 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1005 rdev->wiphy.ht_capa_mod_mask);
1006
1007 if (connkeys && connkeys->def >= 0) {
1008 int idx;
1009 u32 cipher;
1010
1011 idx = connkeys->def;
1012 cipher = connkeys->params[idx].cipher;
1013 /* If given a WEP key we may need it for shared key auth */
1014 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1015 cipher == WLAN_CIPHER_SUITE_WEP104) {
1016 connect->key_idx = idx;
1017 connect->key = connkeys->params[idx].key;
1018 connect->key_len = connkeys->params[idx].key_len;
1019
1020 /*
1021 * If ciphers are not set (e.g. when going through
1022 * iwconfig), we have to set them appropriately here.
1023 */
1024 if (connect->crypto.cipher_group == 0)
1025 connect->crypto.cipher_group = cipher;
1026
1027 if (connect->crypto.n_ciphers_pairwise == 0) {
1028 connect->crypto.n_ciphers_pairwise = 1;
1029 connect->crypto.ciphers_pairwise[0] = cipher;
1030 }
1031 }
1032 }
1033
1034 wdev->connect_keys = connkeys;
1035 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1036 wdev->ssid_len = connect->ssid_len;
1037
1038 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1039 IEEE80211_BSS_TYPE_ESS;
1040
1041 if (!rdev->ops->connect)
1042 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1043 else
1044 err = rdev_connect(rdev, dev, connect);
1045
1046 if (err) {
1047 wdev->connect_keys = NULL;
1048 wdev->ssid_len = 0;
1049 return err;
1050 }
1051
1052 return 0;
1053 }
1054
1055 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1056 struct net_device *dev, u16 reason, bool wextev)
1057 {
1058 struct wireless_dev *wdev = dev->ieee80211_ptr;
1059 int err = 0;
1060
1061 ASSERT_WDEV_LOCK(wdev);
1062
1063 kzfree(wdev->connect_keys);
1064 wdev->connect_keys = NULL;
1065
1066 if (wdev->conn)
1067 err = cfg80211_sme_disconnect(wdev, reason);
1068 else if (!rdev->ops->disconnect)
1069 cfg80211_mlme_down(rdev, dev);
1070 else if (wdev->current_bss)
1071 err = rdev_disconnect(rdev, dev, reason);
1072
1073 return err;
1074 }