projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
cfg80211: decouple regulatory variables from cfg80211_mutex
[linux-2.6-block.git] / net / wireless / sme.c
CommitLineData
b23aa676
SO		 1/*
2 * SME code for cfg80211's connect emulation.
3 *
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright (C) 2009 Intel Corporation. All rights reserved.
6 */
7
8#include <linux/etherdevice.h>
9#include <linux/if_arp.h>
10#include <linux/workqueue.h>
a9a11622
JB		 11#include <linux/wireless.h>
12#include <net/iw_handler.h>
b23aa676
SO		 13#include <net/cfg80211.h>
14#include <net/rtnetlink.h>
15#include "nl80211.h"
16
6829c878
JB		 17struct cfg80211_conn {
18 struct cfg80211_connect_params params;
19 /* these are sub-states of the _CONNECTING sme_state */
20 enum {
21 CFG80211_CONN_IDLE,
22 CFG80211_CONN_SCANNING,
23 CFG80211_CONN_SCAN_AGAIN,
24 CFG80211_CONN_AUTHENTICATE_NEXT,
25 CFG80211_CONN_AUTHENTICATING,
26 CFG80211_CONN_ASSOCIATE_NEXT,
27 CFG80211_CONN_ASSOCIATING,
28 } state;
29 u8 bssid[ETH_ALEN];
30 u8 *ie;
31 size_t ie_len;
32 bool auto_auth;
33};
34
35
36static int cfg80211_conn_scan(struct wireless_dev *wdev)
37{
79c97e97 38 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
6829c878
JB		 39 struct cfg80211_scan_request *request;
40 int n_channels, err;
41
42 ASSERT_RTNL();
79c97e97 43 ASSERT_RDEV_LOCK(rdev);
667503dd 44 ASSERT_WDEV_LOCK(wdev);
6829c878 45
79c97e97 46 if (rdev->scan_req)
6829c878
JB		 47 return -EBUSY;
48
49 if (wdev->conn->params.channel) {
50 n_channels = 1;
51 } else {
52 enum ieee80211_band band;
53 n_channels = 0;
54
55 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
56 if (!wdev->wiphy->bands[band])
57 continue;
58 n_channels += wdev->wiphy->bands[band]->n_channels;
59 }
60 }
61 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
62 sizeof(request->channels[0]) * n_channels,
63 GFP_KERNEL);
64 if (!request)
65 return -ENOMEM;
66
67 request->channels = (void *)((char *)request + sizeof(*request));
68 if (wdev->conn->params.channel)
69 request->channels[0] = wdev->conn->params.channel;
70 else {
71 int i = 0, j;
72 enum ieee80211_band band;
73
74 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
75 if (!wdev->wiphy->bands[band])
76 continue;
77 for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
78 i++, j++)
79 request->channels[i] =
80 &wdev->wiphy->bands[band]->channels[j];
81 }
82 }
83 request->n_channels = n_channels;
84 request->ssids = (void *)(request->channels + n_channels);
85 request->n_ssids = 1;
86
87 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
88 wdev->conn->params.ssid_len);
89 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
90
463d0183 91 request->dev = wdev->netdev;
79c97e97 92 request->wiphy = &rdev->wiphy;
6829c878 93
79c97e97 94 rdev->scan_req = request;
6829c878 95
79c97e97 96 err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
6829c878
JB		 97 if (!err) {
98 wdev->conn->state = CFG80211_CONN_SCANNING;
79c97e97 99 nl80211_send_scan_start(rdev, wdev->netdev);
463d0183 100 dev_hold(wdev->netdev);
6829c878 101 } else {
79c97e97 102 rdev->scan_req = NULL;
6829c878
JB		 103 kfree(request);
104 }
105 return err;
106}
107
108static int cfg80211_conn_do_work(struct wireless_dev *wdev)
109{
79c97e97 110 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
19957bb3
JB		 111 struct cfg80211_connect_params *params;
112 int err;
6829c878 113
667503dd
JB		 114 ASSERT_WDEV_LOCK(wdev);
115
6829c878
JB		 116 if (!wdev->conn)
117 return 0;
118
19957bb3
JB		 119 params = &wdev->conn->params;
120
6829c878
JB		 121 switch (wdev->conn->state) {
122 case CFG80211_CONN_SCAN_AGAIN:
123 return cfg80211_conn_scan(wdev);
124 case CFG80211_CONN_AUTHENTICATE_NEXT:
79c97e97 125 BUG_ON(!rdev->ops->auth);
19957bb3 126 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
79c97e97 127 return __cfg80211_mlme_auth(rdev, wdev->netdev,
667503dd
JB		 128 params->channel, params->auth_type,
129 params->bssid,
130 params->ssid, params->ssid_len,
fffd0934
JB		 131 NULL, 0,
132 params->key, params->key_len,
133 params->key_idx);
6829c878 134 case CFG80211_CONN_ASSOCIATE_NEXT:
79c97e97 135 BUG_ON(!rdev->ops->assoc);
19957bb3 136 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
3e5d7649
JB		 137 /*
138 * We could, later, implement roaming here and then actually
139 * set prev_bssid to non-NULL. But then we need to be aware
140 * that some APs don't like that -- so we'd need to retry
141 * the association.
142 */
79c97e97 143 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
667503dd
JB		 144 params->channel, params->bssid,
145 NULL,
146 params->ssid, params->ssid_len,
147 params->ie, params->ie_len,
148 false, &params->crypto);
19957bb3 149 if (err)
79c97e97 150 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
667503dd
JB		 151 NULL, 0,
152 WLAN_REASON_DEAUTH_LEAVING);
19957bb3 153 return err;
6829c878
JB		 154 default:
155 return 0;
156 }
157}
158
159void cfg80211_conn_work(struct work_struct *work)
160{
79c97e97 161 struct cfg80211_registered_device *rdev =
6829c878
JB		 162 container_of(work, struct cfg80211_registered_device, conn_work);
163 struct wireless_dev *wdev;
164
165 rtnl_lock();
79c97e97
JB		 166 cfg80211_lock_rdev(rdev);
167 mutex_lock(&rdev->devlist_mtx);
6829c878 168
79c97e97 169 list_for_each_entry(wdev, &rdev->netdev_list, list) {
667503dd
JB		 170 wdev_lock(wdev);
171 if (!netif_running(wdev->netdev)) {
172 wdev_unlock(wdev);
6829c878 173 continue;
667503dd
JB		 174 }
175 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
176 wdev_unlock(wdev);
6829c878 177 continue;
667503dd 178 }
6829c878 179 if (cfg80211_conn_do_work(wdev))
667503dd
JB		 180 __cfg80211_connect_result(
181 wdev->netdev,
182 wdev->conn->params.bssid,
183 NULL, 0, NULL, 0,
184 WLAN_STATUS_UNSPECIFIED_FAILURE,
df7fc0f9 185 false, NULL);
667503dd 186 wdev_unlock(wdev);
6829c878
JB		 187 }
188
79c97e97
JB		 189 mutex_unlock(&rdev->devlist_mtx);
190 cfg80211_unlock_rdev(rdev);
6829c878
JB		 191 rtnl_unlock();
192}
193
194static bool cfg80211_get_conn_bss(struct wireless_dev *wdev)
195{
79c97e97 196 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
6829c878
JB		 197 struct cfg80211_bss *bss;
198 u16 capa = WLAN_CAPABILITY_ESS;
199
667503dd
JB		 200 ASSERT_WDEV_LOCK(wdev);
201
6829c878
JB		 202 if (wdev->conn->params.privacy)
203 capa |= WLAN_CAPABILITY_PRIVACY;
204
205 bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
206 wdev->conn->params.ssid,
207 wdev->conn->params.ssid_len,
208 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
209 capa);
6829c878
JB		 210 if (!bss)
211 return false;
212
213 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
214 wdev->conn->params.bssid = wdev->conn->bssid;
215 wdev->conn->params.channel = bss->channel;
216 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
79c97e97 217 schedule_work(&rdev->conn_work);
6829c878
JB		 218
219 cfg80211_put_bss(bss);
220 return true;
221}
222
667503dd 223static void __cfg80211_sme_scan_done(struct net_device *dev)
6829c878
JB		 224{
225 struct wireless_dev *wdev = dev->ieee80211_ptr;
79c97e97 226 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
6829c878 227
667503dd
JB		 228 ASSERT_WDEV_LOCK(wdev);
229
6829c878
JB		 230 if (wdev->sme_state != CFG80211_SME_CONNECTING)
231 return;
232
d4b1a687 233 if (!wdev->conn)
6829c878
JB		 234 return;
235
236 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
237 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
238 return;
239
240 if (!cfg80211_get_conn_bss(wdev)) {
241 /* not found */
242 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
79c97e97 243 schedule_work(&rdev->conn_work);
6829c878 244 else
667503dd
JB		 245 __cfg80211_connect_result(
246 wdev->netdev,
247 wdev->conn->params.bssid,
248 NULL, 0, NULL, 0,
249 WLAN_STATUS_UNSPECIFIED_FAILURE,
df7fc0f9 250 false, NULL);
6829c878
JB		 251 }
252}
253
667503dd
JB		 254void cfg80211_sme_scan_done(struct net_device *dev)
255{
256 struct wireless_dev *wdev = dev->ieee80211_ptr;
257
258 wdev_lock(wdev);
259 __cfg80211_sme_scan_done(dev);
260 wdev_unlock(wdev);
261}
262
263void cfg80211_sme_rx_auth(struct net_device *dev,
264 const u8 *buf, size_t len)
6829c878
JB		 265{
266 struct wireless_dev *wdev = dev->ieee80211_ptr;
267 struct wiphy *wiphy = wdev->wiphy;
268 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
269 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
270 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
271
667503dd
JB		 272 ASSERT_WDEV_LOCK(wdev);
273
6829c878
JB		 274 /* should only RX auth frames when connecting */
275 if (wdev->sme_state != CFG80211_SME_CONNECTING)
276 return;
277
278 if (WARN_ON(!wdev->conn))
279 return;
280
281 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
282 wdev->conn->auto_auth &&
283 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
284 /* select automatically between only open, shared, leap */
285 switch (wdev->conn->params.auth_type) {
286 case NL80211_AUTHTYPE_OPEN_SYSTEM:
fffd0934
JB		 287 if (wdev->connect_keys)
288 wdev->conn->params.auth_type =
289 NL80211_AUTHTYPE_SHARED_KEY;
290 else
291 wdev->conn->params.auth_type =
292 NL80211_AUTHTYPE_NETWORK_EAP;
6829c878
JB		 293 break;
294 case NL80211_AUTHTYPE_SHARED_KEY:
295 wdev->conn->params.auth_type =
296 NL80211_AUTHTYPE_NETWORK_EAP;
297 break;
298 default:
299 /* huh? */
300 wdev->conn->params.auth_type =
301 NL80211_AUTHTYPE_OPEN_SYSTEM;
302 break;
303 }
304 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
305 schedule_work(&rdev->conn_work);
19957bb3 306 } else if (status_code != WLAN_STATUS_SUCCESS) {
4bde0f7d 307 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
df7fc0f9 308 status_code, false, NULL);
19957bb3 309 } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
6829c878
JB		 310 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
311 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
312 schedule_work(&rdev->conn_work);
313 }
314}
b23aa676 315
667503dd
JB		 316void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
317 const u8 *req_ie, size_t req_ie_len,
318 const u8 *resp_ie, size_t resp_ie_len,
df7fc0f9
JB		 319 u16 status, bool wextev,
320 struct cfg80211_bss *bss)
b23aa676
SO		 321{
322 struct wireless_dev *wdev = dev->ieee80211_ptr;
b23aa676
SO		 323#ifdef CONFIG_WIRELESS_EXT
324 union iwreq_data wrqu;
325#endif
326
667503dd
JB		 327 ASSERT_WDEV_LOCK(wdev);
328
b23aa676
SO		 329 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
330 return;
331
e45cd82a
JB		 332 if (wdev->sme_state == CFG80211_SME_CONNECTED)
333 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev,
334 bssid, req_ie, req_ie_len,
667503dd 335 resp_ie, resp_ie_len, GFP_KERNEL);
e45cd82a
JB		 336 else
337 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
338 bssid, req_ie, req_ie_len,
339 resp_ie, resp_ie_len,
667503dd 340 status, GFP_KERNEL);
e45cd82a
JB		 341
342#ifdef CONFIG_WIRELESS_EXT
343 if (wextev) {
344 if (req_ie && status == WLAN_STATUS_SUCCESS) {
345 memset(&wrqu, 0, sizeof(wrqu));
346 wrqu.data.length = req_ie_len;
3409ff77 347 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
e45cd82a
JB		 348 }
349
350 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
351 memset(&wrqu, 0, sizeof(wrqu));
352 wrqu.data.length = resp_ie_len;
353 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
354 }
355
356 memset(&wrqu, 0, sizeof(wrqu));
357 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
358 if (bssid && status == WLAN_STATUS_SUCCESS)
359 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
360 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
361 }
362#endif
363
df7fc0f9
JB		 364 if (wdev->current_bss) {
365 cfg80211_unhold_bss(wdev->current_bss);
366 cfg80211_put_bss(&wdev->current_bss->pub);
367 wdev->current_bss = NULL;
368 }
369
e45cd82a 370 if (status == WLAN_STATUS_SUCCESS &&
fffd0934
JB		 371 wdev->sme_state == CFG80211_SME_IDLE)
372 goto success;
e45cd82a 373
6829c878 374 if (wdev->sme_state != CFG80211_SME_CONNECTING)
b23aa676
SO		 375 return;
376
19957bb3
JB		 377 if (wdev->conn)
378 wdev->conn->state = CFG80211_CONN_IDLE;
379
fffd0934 380 if (status != WLAN_STATUS_SUCCESS) {
b23aa676 381 wdev->sme_state = CFG80211_SME_IDLE;
19957bb3
JB		 382 kfree(wdev->conn);
383 wdev->conn = NULL;
fffd0934
JB		 384 kfree(wdev->connect_keys);
385 wdev->connect_keys = NULL;
386 return;
b23aa676 387 }
fffd0934 388
df7fc0f9
JB		 389 success:
390 if (!bss)
391 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
392 wdev->ssid, wdev->ssid_len,
393 WLAN_CAPABILITY_ESS,
394 WLAN_CAPABILITY_ESS);
fffd0934
JB		 395
396 if (WARN_ON(!bss))
397 return;
398
399 cfg80211_hold_bss(bss_from_pub(bss));
400 wdev->current_bss = bss_from_pub(bss);
401
fffd0934
JB		 402 wdev->sme_state = CFG80211_SME_CONNECTED;
403 cfg80211_upload_connect_keys(wdev);
b23aa676 404}
f2129354
JB		 405
406void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
407 const u8 *req_ie, size_t req_ie_len,
408 const u8 *resp_ie, size_t resp_ie_len,
409 u16 status, gfp_t gfp)
410{
667503dd
JB		 411 struct wireless_dev *wdev = dev->ieee80211_ptr;
412 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
413 struct cfg80211_event *ev;
414 unsigned long flags;
415
416 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
417 if (!ev)
418 return;
419
420 ev->type = EVENT_CONNECT_RESULT;
421 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
422 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
423 ev->cr.req_ie_len = req_ie_len;
424 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
425 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
426 ev->cr.resp_ie_len = resp_ie_len;
427 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
428 ev->cr.status = status;
429
430 spin_lock_irqsave(&wdev->event_lock, flags);
431 list_add_tail(&ev->list, &wdev->event_list);
432 spin_unlock_irqrestore(&wdev->event_lock, flags);
433 schedule_work(&rdev->event_work);
f2129354 434}
b23aa676
SO		 435EXPORT_SYMBOL(cfg80211_connect_result);
436
667503dd
JB		 437void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
438 const u8 *req_ie, size_t req_ie_len,
439 const u8 *resp_ie, size_t resp_ie_len)
b23aa676 440{
b23aa676
SO		 441 struct cfg80211_bss *bss;
442#ifdef CONFIG_WIRELESS_EXT
443 union iwreq_data wrqu;
444#endif
445
667503dd
JB		 446 ASSERT_WDEV_LOCK(wdev);
447
b23aa676
SO		 448 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
449 return;
450
451 if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
452 return;
453
454 /* internal error -- how did we get to CONNECTED w/o BSS? */
455 if (WARN_ON(!wdev->current_bss)) {
456 return;
457 }
458
459 cfg80211_unhold_bss(wdev->current_bss);
19957bb3 460 cfg80211_put_bss(&wdev->current_bss->pub);
b23aa676
SO		 461 wdev->current_bss = NULL;
462
463 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
464 wdev->ssid, wdev->ssid_len,
465 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
466
467 if (WARN_ON(!bss))
468 return;
469
19957bb3
JB		 470 cfg80211_hold_bss(bss_from_pub(bss));
471 wdev->current_bss = bss_from_pub(bss);
b23aa676 472
667503dd
JB		 473 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
474 req_ie, req_ie_len, resp_ie, resp_ie_len,
475 GFP_KERNEL);
b23aa676
SO		 476
477#ifdef CONFIG_WIRELESS_EXT
478 if (req_ie) {
479 memset(&wrqu, 0, sizeof(wrqu));
480 wrqu.data.length = req_ie_len;
3409ff77 481 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
667503dd 482 &wrqu, req_ie);
b23aa676
SO		 483 }
484
485 if (resp_ie) {
486 memset(&wrqu, 0, sizeof(wrqu));
487 wrqu.data.length = resp_ie_len;
667503dd
JB		 488 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
489 &wrqu, resp_ie);
b23aa676
SO		 490 }
491
492 memset(&wrqu, 0, sizeof(wrqu));
493 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
494 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
667503dd 495 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
b23aa676
SO		 496#endif
497}
667503dd
JB		 498
499void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
500 const u8 *req_ie, size_t req_ie_len,
501 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
502{
503 struct wireless_dev *wdev = dev->ieee80211_ptr;
504 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
505 struct cfg80211_event *ev;
506 unsigned long flags;
507
508 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
509 if (!ev)
510 return;
511
512 ev->type = EVENT_ROAMED;
513 memcpy(ev->rm.bssid, bssid, ETH_ALEN);
514 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
515 ev->rm.req_ie_len = req_ie_len;
516 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
517 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
518 ev->rm.resp_ie_len = resp_ie_len;
519 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
520
521 spin_lock_irqsave(&wdev->event_lock, flags);
522 list_add_tail(&ev->list, &wdev->event_list);
523 spin_unlock_irqrestore(&wdev->event_lock, flags);
524 schedule_work(&rdev->event_work);
525}
b23aa676
SO		 526EXPORT_SYMBOL(cfg80211_roamed);
527
667503dd 528void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
6829c878 529 size_t ie_len, u16 reason, bool from_ap)
b23aa676
SO		 530{
531 struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934
JB		 532 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
533 int i;
b23aa676
SO		 534#ifdef CONFIG_WIRELESS_EXT
535 union iwreq_data wrqu;
536#endif
537
667503dd
JB		 538 ASSERT_WDEV_LOCK(wdev);
539
b23aa676
SO		 540 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
541 return;
542
543 if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
544 return;
545
546 if (wdev->current_bss) {
547 cfg80211_unhold_bss(wdev->current_bss);
19957bb3 548 cfg80211_put_bss(&wdev->current_bss->pub);
b23aa676
SO		 549 }
550
551 wdev->current_bss = NULL;
552 wdev->sme_state = CFG80211_SME_IDLE;
553
6829c878
JB		 554 if (wdev->conn) {
555 kfree(wdev->conn->ie);
556 wdev->conn->ie = NULL;
19957bb3
JB		 557 kfree(wdev->conn);
558 wdev->conn = NULL;
6829c878
JB		 559 }
560
fffd0934
JB		 561 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
562
563 /*
564 * Delete all the keys ... pairwise keys can't really
565 * exist any more anyway, but default keys might.
566 */
567 if (rdev->ops->del_key)
568 for (i = 0; i < 6; i++)
569 rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
b23aa676
SO		 570
571#ifdef CONFIG_WIRELESS_EXT
572 memset(&wrqu, 0, sizeof(wrqu));
573 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
574 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
575#endif
576}
577
578void cfg80211_disconnected(struct net_device *dev, u16 reason,
579 u8 *ie, size_t ie_len, gfp_t gfp)
580{
667503dd
JB		 581 struct wireless_dev *wdev = dev->ieee80211_ptr;
582 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
583 struct cfg80211_event *ev;
584 unsigned long flags;
585
586 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
587 if (!ev)
588 return;
589
590 ev->type = EVENT_DISCONNECTED;
591 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
592 ev->dc.ie_len = ie_len;
593 memcpy((void *)ev->dc.ie, ie, ie_len);
594 ev->dc.reason = reason;
595
596 spin_lock_irqsave(&wdev->event_lock, flags);
597 list_add_tail(&ev->list, &wdev->event_list);
598 spin_unlock_irqrestore(&wdev->event_lock, flags);
599 schedule_work(&rdev->event_work);
b23aa676
SO		 600}
601EXPORT_SYMBOL(cfg80211_disconnected);
602
667503dd
JB		 603int __cfg80211_connect(struct cfg80211_registered_device *rdev,
604 struct net_device *dev,
fffd0934
JB		 605 struct cfg80211_connect_params *connect,
606 struct cfg80211_cached_keys *connkeys)
b23aa676 607{
b23aa676 608 struct wireless_dev *wdev = dev->ieee80211_ptr;
667503dd
JB		 609 int err;
610
611 ASSERT_WDEV_LOCK(wdev);
b23aa676
SO		 612
613 if (wdev->sme_state != CFG80211_SME_IDLE)
614 return -EALREADY;
615
fffd0934
JB		 616 if (WARN_ON(wdev->connect_keys)) {
617 kfree(wdev->connect_keys);
618 wdev->connect_keys = NULL;
619 }
620
621 if (connkeys && connkeys->def >= 0) {
622 int idx;
623
624 idx = connkeys->def;
625 /* If given a WEP key we may need it for shared key auth */
626 if (connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP40 ||
627 connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP104) {
628 connect->key_idx = idx;
629 connect->key = connkeys->params[idx].key;
630 connect->key_len = connkeys->params[idx].key_len;
631 }
632 }
633
b23aa676 634 if (!rdev->ops->connect) {
6829c878
JB		 635 if (!rdev->ops->auth || !rdev->ops->assoc)
636 return -EOPNOTSUPP;
637
19957bb3
JB		 638 if (WARN_ON(wdev->conn))
639 return -EINPROGRESS;
640
641 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
642 if (!wdev->conn)
643 return -ENOMEM;
6829c878
JB		 644
645 /*
646 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
647 */
648 memcpy(&wdev->conn->params, connect, sizeof(*connect));
649 if (connect->bssid) {
650 wdev->conn->params.bssid = wdev->conn->bssid;
651 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
652 }
653
654 if (connect->ie) {
655 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
656 GFP_KERNEL);
657 wdev->conn->params.ie = wdev->conn->ie;
19957bb3
JB		 658 if (!wdev->conn->ie) {
659 kfree(wdev->conn);
660 wdev->conn = NULL;
6829c878 661 return -ENOMEM;
19957bb3 662 }
6829c878
JB		 663 }
664
665 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
666 wdev->conn->auto_auth = true;
667 /* start with open system ... should mostly work */
668 wdev->conn->params.auth_type =
669 NL80211_AUTHTYPE_OPEN_SYSTEM;
670 } else {
671 wdev->conn->auto_auth = false;
672 }
673
674 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
675 wdev->ssid_len = connect->ssid_len;
676 wdev->conn->params.ssid = wdev->ssid;
677 wdev->conn->params.ssid_len = connect->ssid_len;
678
679 /* don't care about result -- but fill bssid & channel */
680 if (!wdev->conn->params.bssid || !wdev->conn->params.channel)
681 cfg80211_get_conn_bss(wdev);
682
683 wdev->sme_state = CFG80211_SME_CONNECTING;
fffd0934 684 wdev->connect_keys = connkeys;
6829c878
JB		 685
686 /* we're good if we have both BSSID and channel */
687 if (wdev->conn->params.bssid && wdev->conn->params.channel) {
688 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
689 err = cfg80211_conn_do_work(wdev);
690 } else {
691 /* otherwise we'll need to scan for the AP first */
692 err = cfg80211_conn_scan(wdev);
693 /*
694 * If we can't scan right now, then we need to scan again
695 * after the current scan finished, since the parameters
696 * changed (unless we find a good AP anyway).
697 */
698 if (err == -EBUSY) {
699 err = 0;
700 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
701 }
702 }
19957bb3
JB		 703 if (err) {
704 kfree(wdev->conn);
705 wdev->conn = NULL;
6829c878 706 wdev->sme_state = CFG80211_SME_IDLE;
fffd0934 707 wdev->connect_keys = NULL;
19957bb3 708 }
6829c878
JB		 709
710 return err;
b23aa676
SO		 711 } else {
712 wdev->sme_state = CFG80211_SME_CONNECTING;
fffd0934 713 wdev->connect_keys = connkeys;
b23aa676
SO		 714 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
715 if (err) {
fffd0934 716 wdev->connect_keys = NULL;
b23aa676
SO		 717 wdev->sme_state = CFG80211_SME_IDLE;
718 return err;
719 }
b23aa676 720
6829c878
JB		 721 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
722 wdev->ssid_len = connect->ssid_len;
b23aa676 723
6829c878
JB		 724 return 0;
725 }
b23aa676
SO		 726}
727
667503dd
JB		 728int cfg80211_connect(struct cfg80211_registered_device *rdev,
729 struct net_device *dev,
fffd0934
JB		 730 struct cfg80211_connect_params *connect,
731 struct cfg80211_cached_keys *connkeys)
667503dd
JB		 732{
733 int err;
734
735 wdev_lock(dev->ieee80211_ptr);
fffd0934 736 err = __cfg80211_connect(rdev, dev, connect, connkeys);
667503dd
JB		 737 wdev_unlock(dev->ieee80211_ptr);
738
739 return err;
740}
741
742int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
743 struct net_device *dev, u16 reason, bool wextev)
b23aa676 744{
6829c878 745 struct wireless_dev *wdev = dev->ieee80211_ptr;
b23aa676
SO		 746 int err;
747
667503dd
JB		 748 ASSERT_WDEV_LOCK(wdev);
749
6829c878
JB		 750 if (wdev->sme_state == CFG80211_SME_IDLE)
751 return -EINVAL;
752
fffd0934
JB		 753 kfree(wdev->connect_keys);
754 wdev->connect_keys = NULL;
755
b23aa676 756 if (!rdev->ops->disconnect) {
19957bb3
JB		 757 if (!rdev->ops->deauth)
758 return -EOPNOTSUPP;
6829c878 759
19957bb3
JB		 760 /* was it connected by userspace SME? */
761 if (!wdev->conn) {
762 cfg80211_mlme_down(rdev, dev);
763 return 0;
764 }
6829c878
JB		 765
766 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
767 (wdev->conn->state == CFG80211_CONN_SCANNING ||
768 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
769 wdev->sme_state = CFG80211_SME_IDLE;
19957bb3
JB		 770 kfree(wdev->conn);
771 wdev->conn = NULL;
6829c878
JB		 772 return 0;
773 }
774
6829c878 775 /* wdev->conn->params.bssid must be set if > SCANNING */
667503dd
JB		 776 err = __cfg80211_mlme_deauth(rdev, dev,
777 wdev->conn->params.bssid,
778 NULL, 0, reason);
6829c878
JB		 779 if (err)
780 return err;
b23aa676
SO		 781 } else {
782 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
783 if (err)
784 return err;
785 }
786
6829c878 787 if (wdev->sme_state == CFG80211_SME_CONNECTED)
667503dd 788 __cfg80211_disconnected(dev, NULL, 0, 0, false);
6829c878 789 else if (wdev->sme_state == CFG80211_SME_CONNECTING)
f2129354
JB		 790 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
791 WLAN_STATUS_UNSPECIFIED_FAILURE,
df7fc0f9 792 wextev, NULL);
b23aa676
SO		 793
794 return 0;
795}
19957bb3 796
667503dd
JB		 797int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
798 struct net_device *dev,
799 u16 reason, bool wextev)
800{
801 int err;
802
803 wdev_lock(dev->ieee80211_ptr);
804 err = __cfg80211_disconnect(rdev, dev, reason, wextev);
805 wdev_unlock(dev->ieee80211_ptr);
806
807 return err;
808}
809
19957bb3
JB		 810void cfg80211_sme_disassoc(struct net_device *dev, int idx)
811{
812 struct wireless_dev *wdev = dev->ieee80211_ptr;
813 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
814 u8 bssid[ETH_ALEN];
815
667503dd
JB		 816 ASSERT_WDEV_LOCK(wdev);
817
19957bb3
JB		 818 if (!wdev->conn)
819 return;
820
821 if (wdev->conn->state == CFG80211_CONN_IDLE)
822 return;
823
824 /*
825 * Ok, so the association was made by this SME -- we don't
826 * want it any more so deauthenticate too.
827 */
828
829 if (!wdev->auth_bsses[idx])
830 return;
831
832 memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
ec3f1490
JB		 833 if (__cfg80211_mlme_deauth(rdev, dev, bssid,
834 NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
19957bb3
JB		 835 /* whatever -- assume gone anyway */
836 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
837 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
838 wdev->auth_bsses[idx] = NULL;
839 }
840}
Linux 6.x block layer and io_uring tree(s)