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libertas if_usb: Fix crash on 64-bit machines
[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"
8b19e6ca 16#include "reg.h"
b23aa676 17
6829c878
JB		 18struct cfg80211_conn {
19 struct cfg80211_connect_params params;
20 /* these are sub-states of the _CONNECTING sme_state */
21 enum {
22 CFG80211_CONN_IDLE,
23 CFG80211_CONN_SCANNING,
24 CFG80211_CONN_SCAN_AGAIN,
25 CFG80211_CONN_AUTHENTICATE_NEXT,
26 CFG80211_CONN_AUTHENTICATING,
27 CFG80211_CONN_ASSOCIATE_NEXT,
28 CFG80211_CONN_ASSOCIATING,
7d930bc3 29 CFG80211_CONN_DEAUTH_ASSOC_FAIL,
6829c878 30 } state;
f401a6f7 31 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
6829c878
JB		 32 u8 *ie;
33 size_t ie_len;
f401a6f7 34 bool auto_auth, prev_bssid_valid;
6829c878
JB		 35};
36
37
38static int cfg80211_conn_scan(struct wireless_dev *wdev)
39{
79c97e97 40 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
6829c878
JB		 41 struct cfg80211_scan_request *request;
42 int n_channels, err;
43
44 ASSERT_RTNL();
79c97e97 45 ASSERT_RDEV_LOCK(rdev);
667503dd 46 ASSERT_WDEV_LOCK(wdev);
6829c878 47
79c97e97 48 if (rdev->scan_req)
6829c878
JB		 49 return -EBUSY;
50
51 if (wdev->conn->params.channel) {
52 n_channels = 1;
53 } else {
54 enum ieee80211_band band;
55 n_channels = 0;
56
57 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
58 if (!wdev->wiphy->bands[band])
59 continue;
60 n_channels += wdev->wiphy->bands[band]->n_channels;
61 }
62 }
63 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
64 sizeof(request->channels[0]) * n_channels,
65 GFP_KERNEL);
66 if (!request)
67 return -ENOMEM;
68
6829c878
JB		 69 if (wdev->conn->params.channel)
70 request->channels[0] = wdev->conn->params.channel;
71 else {
72 int i = 0, j;
73 enum ieee80211_band band;
74
75 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
76 if (!wdev->wiphy->bands[band])
77 continue;
78 for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
79 i++, j++)
80 request->channels[i] =
81 &wdev->wiphy->bands[band]->channels[j];
82 }
83 }
84 request->n_channels = n_channels;
5ba63533 85 request->ssids = (void *)&request->channels[n_channels];
6829c878
JB		 86 request->n_ssids = 1;
87
88 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
89 wdev->conn->params.ssid_len);
90 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
91
463d0183 92 request->dev = wdev->netdev;
79c97e97 93 request->wiphy = &rdev->wiphy;
6829c878 94
79c97e97 95 rdev->scan_req = request;
6829c878 96
79c97e97 97 err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
6829c878
JB		 98 if (!err) {
99 wdev->conn->state = CFG80211_CONN_SCANNING;
79c97e97 100 nl80211_send_scan_start(rdev, wdev->netdev);
463d0183 101 dev_hold(wdev->netdev);
6829c878 102 } else {
79c97e97 103 rdev->scan_req = NULL;
6829c878
JB		 104 kfree(request);
105 }
106 return err;
107}
108
109static int cfg80211_conn_do_work(struct wireless_dev *wdev)
110{
79c97e97 111 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
19957bb3 112 struct cfg80211_connect_params *params;
f401a6f7 113 const u8 *prev_bssid = NULL;
19957bb3 114 int err;
6829c878 115
667503dd
JB		 116 ASSERT_WDEV_LOCK(wdev);
117
6829c878
JB		 118 if (!wdev->conn)
119 return 0;
120
19957bb3
JB		 121 params = &wdev->conn->params;
122
6829c878
JB		 123 switch (wdev->conn->state) {
124 case CFG80211_CONN_SCAN_AGAIN:
125 return cfg80211_conn_scan(wdev);
126 case CFG80211_CONN_AUTHENTICATE_NEXT:
79c97e97 127 BUG_ON(!rdev->ops->auth);
19957bb3 128 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
79c97e97 129 return __cfg80211_mlme_auth(rdev, wdev->netdev,
667503dd
JB		 130 params->channel, params->auth_type,
131 params->bssid,
132 params->ssid, params->ssid_len,
fffd0934
JB		 133 NULL, 0,
134 params->key, params->key_len,
135 params->key_idx);
6829c878 136 case CFG80211_CONN_ASSOCIATE_NEXT:
79c97e97 137 BUG_ON(!rdev->ops->assoc);
19957bb3 138 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
f401a6f7
JB		 139 if (wdev->conn->prev_bssid_valid)
140 prev_bssid = wdev->conn->prev_bssid;
79c97e97 141 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
667503dd 142 params->channel, params->bssid,
f401a6f7 143 prev_bssid,
667503dd
JB		 144 params->ssid, params->ssid_len,
145 params->ie, params->ie_len,
146 false, &params->crypto);
19957bb3 147 if (err)
79c97e97 148 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
667503dd
JB		 149 NULL, 0,
150 WLAN_REASON_DEAUTH_LEAVING);
19957bb3 151 return err;
7d930bc3
JB		 152 case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
153 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
154 NULL, 0,
155 WLAN_REASON_DEAUTH_LEAVING);
156 /* return an error so that we call __cfg80211_connect_result() */
157 return -EINVAL;
6829c878
JB		 158 default:
159 return 0;
160 }
161}
162
163void cfg80211_conn_work(struct work_struct *work)
164{
79c97e97 165 struct cfg80211_registered_device *rdev =
6829c878
JB		 166 container_of(work, struct cfg80211_registered_device, conn_work);
167 struct wireless_dev *wdev;
7d930bc3 168 u8 bssid[ETH_ALEN];
6829c878
JB		 169
170 rtnl_lock();
79c97e97
JB		 171 cfg80211_lock_rdev(rdev);
172 mutex_lock(&rdev->devlist_mtx);
6829c878 173
79c97e97 174 list_for_each_entry(wdev, &rdev->netdev_list, list) {
667503dd
JB		 175 wdev_lock(wdev);
176 if (!netif_running(wdev->netdev)) {
177 wdev_unlock(wdev);
6829c878 178 continue;
667503dd
JB		 179 }
180 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
181 wdev_unlock(wdev);
6829c878 182 continue;
667503dd 183 }
7d930bc3 184 memcpy(bssid, wdev->conn->params.bssid, ETH_ALEN);
6829c878 185 if (cfg80211_conn_do_work(wdev))
667503dd 186 __cfg80211_connect_result(
7d930bc3 187 wdev->netdev, bssid,
667503dd
JB		 188 NULL, 0, NULL, 0,
189 WLAN_STATUS_UNSPECIFIED_FAILURE,
df7fc0f9 190 false, NULL);
667503dd 191 wdev_unlock(wdev);
6829c878
JB		 192 }
193
79c97e97
JB		 194 mutex_unlock(&rdev->devlist_mtx);
195 cfg80211_unlock_rdev(rdev);
6829c878
JB		 196 rtnl_unlock();
197}
198
bbac31f4 199static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
6829c878 200{
79c97e97 201 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
6829c878
JB		 202 struct cfg80211_bss *bss;
203 u16 capa = WLAN_CAPABILITY_ESS;
204
667503dd
JB		 205 ASSERT_WDEV_LOCK(wdev);
206
6829c878
JB		 207 if (wdev->conn->params.privacy)
208 capa |= WLAN_CAPABILITY_PRIVACY;
209
210 bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
211 wdev->conn->params.ssid,
212 wdev->conn->params.ssid_len,
213 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
214 capa);
6829c878 215 if (!bss)
bbac31f4 216 return NULL;
6829c878
JB		 217
218 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
219 wdev->conn->params.bssid = wdev->conn->bssid;
220 wdev->conn->params.channel = bss->channel;
221 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
79c97e97 222 schedule_work(&rdev->conn_work);
6829c878 223
bbac31f4 224 return bss;
6829c878
JB		 225}
226
667503dd 227static void __cfg80211_sme_scan_done(struct net_device *dev)
6829c878
JB		 228{
229 struct wireless_dev *wdev = dev->ieee80211_ptr;
79c97e97 230 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
bbac31f4 231 struct cfg80211_bss *bss;
6829c878 232
667503dd
JB		 233 ASSERT_WDEV_LOCK(wdev);
234
6829c878
JB		 235 if (wdev->sme_state != CFG80211_SME_CONNECTING)
236 return;
237
d4b1a687 238 if (!wdev->conn)
6829c878
JB		 239 return;
240
241 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
242 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
243 return;
244
bbac31f4
JB		 245 bss = cfg80211_get_conn_bss(wdev);
246 if (bss) {
247 cfg80211_put_bss(bss);
248 } else {
6829c878
JB		 249 /* not found */
250 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
79c97e97 251 schedule_work(&rdev->conn_work);
6829c878 252 else
667503dd
JB		 253 __cfg80211_connect_result(
254 wdev->netdev,
255 wdev->conn->params.bssid,
256 NULL, 0, NULL, 0,
257 WLAN_STATUS_UNSPECIFIED_FAILURE,
df7fc0f9 258 false, NULL);
6829c878
JB		 259 }
260}
261
667503dd
JB		 262void cfg80211_sme_scan_done(struct net_device *dev)
263{
264 struct wireless_dev *wdev = dev->ieee80211_ptr;
265
59bbb6f7 266 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
667503dd
JB		 267 wdev_lock(wdev);
268 __cfg80211_sme_scan_done(dev);
269 wdev_unlock(wdev);
59bbb6f7 270 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
667503dd
JB		 271}
272
273void cfg80211_sme_rx_auth(struct net_device *dev,
274 const u8 *buf, size_t len)
6829c878
JB		 275{
276 struct wireless_dev *wdev = dev->ieee80211_ptr;
277 struct wiphy *wiphy = wdev->wiphy;
278 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
279 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
280 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
281
667503dd
JB		 282 ASSERT_WDEV_LOCK(wdev);
283
6829c878
JB		 284 /* should only RX auth frames when connecting */
285 if (wdev->sme_state != CFG80211_SME_CONNECTING)
286 return;
287
288 if (WARN_ON(!wdev->conn))
289 return;
290
291 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
292 wdev->conn->auto_auth &&
293 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
294 /* select automatically between only open, shared, leap */
295 switch (wdev->conn->params.auth_type) {
296 case NL80211_AUTHTYPE_OPEN_SYSTEM:
fffd0934
JB		 297 if (wdev->connect_keys)
298 wdev->conn->params.auth_type =
299 NL80211_AUTHTYPE_SHARED_KEY;
300 else
301 wdev->conn->params.auth_type =
302 NL80211_AUTHTYPE_NETWORK_EAP;
6829c878
JB		 303 break;
304 case NL80211_AUTHTYPE_SHARED_KEY:
305 wdev->conn->params.auth_type =
306 NL80211_AUTHTYPE_NETWORK_EAP;
307 break;
308 default:
309 /* huh? */
310 wdev->conn->params.auth_type =
311 NL80211_AUTHTYPE_OPEN_SYSTEM;
312 break;
313 }
314 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
315 schedule_work(&rdev->conn_work);
19957bb3 316 } else if (status_code != WLAN_STATUS_SUCCESS) {
4bde0f7d 317 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
df7fc0f9 318 status_code, false, NULL);
19957bb3 319 } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
6829c878
JB		 320 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
321 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
322 schedule_work(&rdev->conn_work);
323 }
324}
b23aa676 325
f401a6f7
JB		 326bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
327{
328 struct wiphy *wiphy = wdev->wiphy;
329 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
330
331 if (WARN_ON(!wdev->conn))
332 return false;
333
334 if (!wdev->conn->prev_bssid_valid)
335 return false;
336
337 /*
338 * Some stupid APs don't accept reassoc, so we
339 * need to fall back to trying regular assoc.
340 */
341 wdev->conn->prev_bssid_valid = false;
342 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
343 schedule_work(&rdev->conn_work);
344
345 return true;
346}
347
7d930bc3
JB		 348void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
349{
350 struct wiphy *wiphy = wdev->wiphy;
351 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
352
353 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
354 schedule_work(&rdev->conn_work);
355}
356
667503dd
JB		 357void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
358 const u8 *req_ie, size_t req_ie_len,
359 const u8 *resp_ie, size_t resp_ie_len,
df7fc0f9
JB		 360 u16 status, bool wextev,
361 struct cfg80211_bss *bss)
b23aa676
SO		 362{
363 struct wireless_dev *wdev = dev->ieee80211_ptr;
8b19e6ca 364 u8 *country_ie;
b23aa676
SO		 365#ifdef CONFIG_WIRELESS_EXT
366 union iwreq_data wrqu;
367#endif
368
667503dd
JB		 369 ASSERT_WDEV_LOCK(wdev);
370
b23aa676
SO		 371 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
372 return;
373
f7969969 374 if (wdev->sme_state != CFG80211_SME_CONNECTING)
ea416a79
JB		 375 return;
376
377 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
e45cd82a 378 bssid, req_ie, req_ie_len,
ea416a79
JB		 379 resp_ie, resp_ie_len,
380 status, GFP_KERNEL);
e45cd82a
JB		 381
382#ifdef CONFIG_WIRELESS_EXT
383 if (wextev) {
384 if (req_ie && status == WLAN_STATUS_SUCCESS) {
385 memset(&wrqu, 0, sizeof(wrqu));
386 wrqu.data.length = req_ie_len;
3409ff77 387 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
e45cd82a
JB		 388 }
389
390 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
391 memset(&wrqu, 0, sizeof(wrqu));
392 wrqu.data.length = resp_ie_len;
393 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
394 }
395
396 memset(&wrqu, 0, sizeof(wrqu));
397 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
f401a6f7 398 if (bssid && status == WLAN_STATUS_SUCCESS) {
e45cd82a 399 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
f401a6f7
JB		 400 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
401 wdev->wext.prev_bssid_valid = true;
402 }
e45cd82a
JB		 403 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
404 }
405#endif
406
df7fc0f9
JB		 407 if (wdev->current_bss) {
408 cfg80211_unhold_bss(wdev->current_bss);
409 cfg80211_put_bss(&wdev->current_bss->pub);
410 wdev->current_bss = NULL;
411 }
412
19957bb3
JB		 413 if (wdev->conn)
414 wdev->conn->state = CFG80211_CONN_IDLE;
415
fffd0934 416 if (status != WLAN_STATUS_SUCCESS) {
b23aa676 417 wdev->sme_state = CFG80211_SME_IDLE;
415ad1ef
DK		 418 if (wdev->conn)
419 kfree(wdev->conn->ie);
19957bb3
JB		 420 kfree(wdev->conn);
421 wdev->conn = NULL;
fffd0934
JB		 422 kfree(wdev->connect_keys);
423 wdev->connect_keys = NULL;
8dadadb7 424 wdev->ssid_len = 0;
fffd0934 425 return;
b23aa676 426 }
fffd0934 427
df7fc0f9
JB		 428 if (!bss)
429 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
430 wdev->ssid, wdev->ssid_len,
431 WLAN_CAPABILITY_ESS,
432 WLAN_CAPABILITY_ESS);
fffd0934
JB		 433
434 if (WARN_ON(!bss))
435 return;
436
437 cfg80211_hold_bss(bss_from_pub(bss));
438 wdev->current_bss = bss_from_pub(bss);
439
fffd0934
JB		 440 wdev->sme_state = CFG80211_SME_CONNECTED;
441 cfg80211_upload_connect_keys(wdev);
8b19e6ca
LR		 442
443 country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
444
445 if (!country_ie)
446 return;
447
448 /*
449 * ieee80211_bss_get_ie() ensures we can access:
450 * - country_ie + 2, the start of the country ie data, and
451 * - and country_ie[1] which is the IE length
452 */
453 regulatory_hint_11d(wdev->wiphy,
454 country_ie + 2,
455 country_ie[1]);
b23aa676 456}
f2129354
JB		 457
458void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
459 const u8 *req_ie, size_t req_ie_len,
460 const u8 *resp_ie, size_t resp_ie_len,
461 u16 status, gfp_t gfp)
462{
667503dd
JB		 463 struct wireless_dev *wdev = dev->ieee80211_ptr;
464 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
465 struct cfg80211_event *ev;
466 unsigned long flags;
467
f7969969
JB		 468 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
469
667503dd
JB		 470 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
471 if (!ev)
472 return;
473
474 ev->type = EVENT_CONNECT_RESULT;
16a832e7
ZY		 475 if (bssid)
476 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
667503dd
JB		 477 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
478 ev->cr.req_ie_len = req_ie_len;
479 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
480 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
481 ev->cr.resp_ie_len = resp_ie_len;
482 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
483 ev->cr.status = status;
484
485 spin_lock_irqsave(&wdev->event_lock, flags);
486 list_add_tail(&ev->list, &wdev->event_list);
487 spin_unlock_irqrestore(&wdev->event_lock, flags);
488 schedule_work(&rdev->event_work);
f2129354 489}
b23aa676
SO		 490EXPORT_SYMBOL(cfg80211_connect_result);
491
667503dd
JB		 492void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
493 const u8 *req_ie, size_t req_ie_len,
494 const u8 *resp_ie, size_t resp_ie_len)
b23aa676 495{
b23aa676
SO		 496 struct cfg80211_bss *bss;
497#ifdef CONFIG_WIRELESS_EXT
498 union iwreq_data wrqu;
499#endif
500
667503dd
JB		 501 ASSERT_WDEV_LOCK(wdev);
502
b23aa676
SO		 503 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
504 return;
505
f7969969 506 if (wdev->sme_state != CFG80211_SME_CONNECTED)
b23aa676
SO		 507 return;
508
509 /* internal error -- how did we get to CONNECTED w/o BSS? */
510 if (WARN_ON(!wdev->current_bss)) {
511 return;
512 }
513
514 cfg80211_unhold_bss(wdev->current_bss);
19957bb3 515 cfg80211_put_bss(&wdev->current_bss->pub);
b23aa676
SO		 516 wdev->current_bss = NULL;
517
518 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
519 wdev->ssid, wdev->ssid_len,
520 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
521
522 if (WARN_ON(!bss))
523 return;
524
19957bb3
JB		 525 cfg80211_hold_bss(bss_from_pub(bss));
526 wdev->current_bss = bss_from_pub(bss);
b23aa676 527
667503dd
JB		 528 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
529 req_ie, req_ie_len, resp_ie, resp_ie_len,
530 GFP_KERNEL);
b23aa676
SO		 531
532#ifdef CONFIG_WIRELESS_EXT
533 if (req_ie) {
534 memset(&wrqu, 0, sizeof(wrqu));
535 wrqu.data.length = req_ie_len;
3409ff77 536 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
667503dd 537 &wrqu, req_ie);
b23aa676
SO		 538 }
539
540 if (resp_ie) {
541 memset(&wrqu, 0, sizeof(wrqu));
542 wrqu.data.length = resp_ie_len;
667503dd
JB		 543 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
544 &wrqu, resp_ie);
b23aa676
SO		 545 }
546
547 memset(&wrqu, 0, sizeof(wrqu));
548 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
549 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
f401a6f7
JB		 550 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
551 wdev->wext.prev_bssid_valid = true;
667503dd 552 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
b23aa676
SO		 553#endif
554}
667503dd
JB		 555
556void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
557 const u8 *req_ie, size_t req_ie_len,
558 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
559{
560 struct wireless_dev *wdev = dev->ieee80211_ptr;
561 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
562 struct cfg80211_event *ev;
563 unsigned long flags;
564
f7969969
JB		 565 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
566
667503dd
JB		 567 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
568 if (!ev)
569 return;
570
571 ev->type = EVENT_ROAMED;
572 memcpy(ev->rm.bssid, bssid, ETH_ALEN);
573 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
574 ev->rm.req_ie_len = req_ie_len;
575 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
576 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
577 ev->rm.resp_ie_len = resp_ie_len;
578 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
579
580 spin_lock_irqsave(&wdev->event_lock, flags);
581 list_add_tail(&ev->list, &wdev->event_list);
582 spin_unlock_irqrestore(&wdev->event_lock, flags);
583 schedule_work(&rdev->event_work);
584}
b23aa676
SO		 585EXPORT_SYMBOL(cfg80211_roamed);
586
667503dd 587void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
6829c878 588 size_t ie_len, u16 reason, bool from_ap)
b23aa676
SO		 589{
590 struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934
JB		 591 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
592 int i;
b23aa676
SO		 593#ifdef CONFIG_WIRELESS_EXT
594 union iwreq_data wrqu;
595#endif
596
667503dd
JB		 597 ASSERT_WDEV_LOCK(wdev);
598
b23aa676
SO		 599 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
600 return;
601
f7969969 602 if (wdev->sme_state != CFG80211_SME_CONNECTED)
b23aa676
SO		 603 return;
604
605 if (wdev->current_bss) {
606 cfg80211_unhold_bss(wdev->current_bss);
19957bb3 607 cfg80211_put_bss(&wdev->current_bss->pub);
b23aa676
SO		 608 }
609
610 wdev->current_bss = NULL;
611 wdev->sme_state = CFG80211_SME_IDLE;
8dadadb7 612 wdev->ssid_len = 0;
b23aa676 613
6829c878 614 if (wdev->conn) {
b6f0b639
JB		 615 const u8 *bssid;
616 int ret;
617
6829c878
JB		 618 kfree(wdev->conn->ie);
619 wdev->conn->ie = NULL;
19957bb3
JB		 620 kfree(wdev->conn);
621 wdev->conn = NULL;
b6f0b639
JB		 622
623 /*
624 * If this disconnect was due to a disassoc, we
625 * we might still have an auth BSS around. For
626 * the userspace SME that's currently expected,
627 * but for the kernel SME (nl80211 CONNECT or
628 * wireless extensions) we want to clear up all
629 * state.
630 */
631 for (i = 0; i < MAX_AUTH_BSSES; i++) {
632 if (!wdev->auth_bsses[i])
633 continue;
634 bssid = wdev->auth_bsses[i]->pub.bssid;
635 ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
636 WLAN_REASON_DEAUTH_LEAVING);
637 WARN(ret, "deauth failed: %d\n", ret);
638 }
6829c878
JB		 639 }
640
fffd0934
JB		 641 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
642
643 /*
644 * Delete all the keys ... pairwise keys can't really
645 * exist any more anyway, but default keys might.
646 */
647 if (rdev->ops->del_key)
648 for (i = 0; i < 6; i++)
649 rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
b23aa676
SO		 650
651#ifdef CONFIG_WIRELESS_EXT
652 memset(&wrqu, 0, sizeof(wrqu));
653 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
654 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
655#endif
656}
657
658void cfg80211_disconnected(struct net_device *dev, u16 reason,
659 u8 *ie, size_t ie_len, gfp_t gfp)
660{
667503dd
JB		 661 struct wireless_dev *wdev = dev->ieee80211_ptr;
662 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
663 struct cfg80211_event *ev;
664 unsigned long flags;
665
f7969969
JB		 666 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
667
667503dd
JB		 668 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
669 if (!ev)
670 return;
671
672 ev->type = EVENT_DISCONNECTED;
673 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
674 ev->dc.ie_len = ie_len;
675 memcpy((void *)ev->dc.ie, ie, ie_len);
676 ev->dc.reason = reason;
677
678 spin_lock_irqsave(&wdev->event_lock, flags);
679 list_add_tail(&ev->list, &wdev->event_list);
680 spin_unlock_irqrestore(&wdev->event_lock, flags);
681 schedule_work(&rdev->event_work);
b23aa676
SO		 682}
683EXPORT_SYMBOL(cfg80211_disconnected);
684
667503dd
JB		 685int __cfg80211_connect(struct cfg80211_registered_device *rdev,
686 struct net_device *dev,
fffd0934 687 struct cfg80211_connect_params *connect,
f401a6f7
JB		 688 struct cfg80211_cached_keys *connkeys,
689 const u8 *prev_bssid)
b23aa676 690{
b23aa676 691 struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 692 struct ieee80211_channel *chan;
bbac31f4 693 struct cfg80211_bss *bss = NULL;
667503dd
JB		 694 int err;
695
696 ASSERT_WDEV_LOCK(wdev);
b23aa676
SO		 697
698 if (wdev->sme_state != CFG80211_SME_IDLE)
699 return -EALREADY;
700
59bbb6f7
JB		 701 chan = rdev_fixed_channel(rdev, wdev);
702 if (chan && chan != connect->channel)
703 return -EBUSY;
704
fffd0934
JB		 705 if (WARN_ON(wdev->connect_keys)) {
706 kfree(wdev->connect_keys);
707 wdev->connect_keys = NULL;
708 }
709
710 if (connkeys && connkeys->def >= 0) {
711 int idx;
bcba8eae 712 u32 cipher;
fffd0934
JB		 713
714 idx = connkeys->def;
bcba8eae 715 cipher = connkeys->params[idx].cipher;
fffd0934 716 /* If given a WEP key we may need it for shared key auth */
bcba8eae
SO		 717 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
718 cipher == WLAN_CIPHER_SUITE_WEP104) {
fffd0934
JB		 719 connect->key_idx = idx;
720 connect->key = connkeys->params[idx].key;
721 connect->key_len = connkeys->params[idx].key_len;
bcba8eae
SO		 722
723 /*
724 * If ciphers are not set (e.g. when going through
725 * iwconfig), we have to set them appropriately here.
726 */
727 if (connect->crypto.cipher_group == 0)
728 connect->crypto.cipher_group = cipher;
729
730 if (connect->crypto.n_ciphers_pairwise == 0) {
731 connect->crypto.n_ciphers_pairwise = 1;
732 connect->crypto.ciphers_pairwise[0] = cipher;
733 }
fffd0934
JB		 734 }
735 }
736
b23aa676 737 if (!rdev->ops->connect) {
6829c878
JB		 738 if (!rdev->ops->auth || !rdev->ops->assoc)
739 return -EOPNOTSUPP;
740
19957bb3
JB		 741 if (WARN_ON(wdev->conn))
742 return -EINPROGRESS;
743
744 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
745 if (!wdev->conn)
746 return -ENOMEM;
6829c878
JB		 747
748 /*
749 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
750 */
751 memcpy(&wdev->conn->params, connect, sizeof(*connect));
752 if (connect->bssid) {
753 wdev->conn->params.bssid = wdev->conn->bssid;
754 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
755 }
756
757 if (connect->ie) {
758 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
759 GFP_KERNEL);
760 wdev->conn->params.ie = wdev->conn->ie;
19957bb3
JB		 761 if (!wdev->conn->ie) {
762 kfree(wdev->conn);
763 wdev->conn = NULL;
6829c878 764 return -ENOMEM;
19957bb3 765 }
6829c878
JB		 766 }
767
768 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
769 wdev->conn->auto_auth = true;
770 /* start with open system ... should mostly work */
771 wdev->conn->params.auth_type =
772 NL80211_AUTHTYPE_OPEN_SYSTEM;
773 } else {
774 wdev->conn->auto_auth = false;
775 }
776
777 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
778 wdev->ssid_len = connect->ssid_len;
779 wdev->conn->params.ssid = wdev->ssid;
780 wdev->conn->params.ssid_len = connect->ssid_len;
781
8bb89485
JB		 782 /* see if we have the bss already */
783 bss = cfg80211_get_conn_bss(wdev);
6829c878
JB		 784
785 wdev->sme_state = CFG80211_SME_CONNECTING;
fffd0934 786 wdev->connect_keys = connkeys;
6829c878 787
f401a6f7
JB		 788 if (prev_bssid) {
789 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
790 wdev->conn->prev_bssid_valid = true;
791 }
792
bbac31f4
JB		 793 /* we're good if we have a matching bss struct */
794 if (bss) {
6829c878
JB		 795 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
796 err = cfg80211_conn_do_work(wdev);
bbac31f4 797 cfg80211_put_bss(bss);
6829c878
JB		 798 } else {
799 /* otherwise we'll need to scan for the AP first */
800 err = cfg80211_conn_scan(wdev);
801 /*
802 * If we can't scan right now, then we need to scan again
803 * after the current scan finished, since the parameters
804 * changed (unless we find a good AP anyway).
805 */
806 if (err == -EBUSY) {
807 err = 0;
808 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
809 }
810 }
19957bb3 811 if (err) {
415ad1ef 812 kfree(wdev->conn->ie);
19957bb3
JB		 813 kfree(wdev->conn);
814 wdev->conn = NULL;
6829c878 815 wdev->sme_state = CFG80211_SME_IDLE;
fffd0934 816 wdev->connect_keys = NULL;
8dadadb7 817 wdev->ssid_len = 0;
19957bb3 818 }
6829c878
JB		 819
820 return err;
b23aa676
SO		 821 } else {
822 wdev->sme_state = CFG80211_SME_CONNECTING;
fffd0934 823 wdev->connect_keys = connkeys;
b23aa676
SO		 824 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
825 if (err) {
fffd0934 826 wdev->connect_keys = NULL;
b23aa676
SO		 827 wdev->sme_state = CFG80211_SME_IDLE;
828 return err;
829 }
b23aa676 830
6829c878
JB		 831 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
832 wdev->ssid_len = connect->ssid_len;
b23aa676 833
6829c878
JB		 834 return 0;
835 }
b23aa676
SO		 836}
837
667503dd
JB		 838int cfg80211_connect(struct cfg80211_registered_device *rdev,
839 struct net_device *dev,
fffd0934
JB		 840 struct cfg80211_connect_params *connect,
841 struct cfg80211_cached_keys *connkeys)
667503dd
JB		 842{
843 int err;
844
59bbb6f7 845 mutex_lock(&rdev->devlist_mtx);
667503dd 846 wdev_lock(dev->ieee80211_ptr);
f401a6f7 847 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
667503dd 848 wdev_unlock(dev->ieee80211_ptr);
59bbb6f7 849 mutex_unlock(&rdev->devlist_mtx);
667503dd
JB		 850
851 return err;
852}
853
854int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
855 struct net_device *dev, u16 reason, bool wextev)
b23aa676 856{
6829c878 857 struct wireless_dev *wdev = dev->ieee80211_ptr;
b23aa676
SO		 858 int err;
859
667503dd
JB		 860 ASSERT_WDEV_LOCK(wdev);
861
6829c878
JB		 862 if (wdev->sme_state == CFG80211_SME_IDLE)
863 return -EINVAL;
864
fffd0934
JB		 865 kfree(wdev->connect_keys);
866 wdev->connect_keys = NULL;
867
b23aa676 868 if (!rdev->ops->disconnect) {
19957bb3
JB		 869 if (!rdev->ops->deauth)
870 return -EOPNOTSUPP;
6829c878 871
19957bb3
JB		 872 /* was it connected by userspace SME? */
873 if (!wdev->conn) {
874 cfg80211_mlme_down(rdev, dev);
875 return 0;
876 }
6829c878
JB		 877
878 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
879 (wdev->conn->state == CFG80211_CONN_SCANNING ||
880 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
881 wdev->sme_state = CFG80211_SME_IDLE;
415ad1ef 882 kfree(wdev->conn->ie);
19957bb3
JB		 883 kfree(wdev->conn);
884 wdev->conn = NULL;
8dadadb7 885 wdev->ssid_len = 0;
6829c878
JB		 886 return 0;
887 }
888
6829c878 889 /* wdev->conn->params.bssid must be set if > SCANNING */
667503dd
JB		 890 err = __cfg80211_mlme_deauth(rdev, dev,
891 wdev->conn->params.bssid,
892 NULL, 0, reason);
6829c878
JB		 893 if (err)
894 return err;
b23aa676
SO		 895 } else {
896 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
897 if (err)
898 return err;
899 }
900
6829c878 901 if (wdev->sme_state == CFG80211_SME_CONNECTED)
667503dd 902 __cfg80211_disconnected(dev, NULL, 0, 0, false);
6829c878 903 else if (wdev->sme_state == CFG80211_SME_CONNECTING)
f2129354
JB		 904 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
905 WLAN_STATUS_UNSPECIFIED_FAILURE,
df7fc0f9 906 wextev, NULL);
b23aa676
SO		 907
908 return 0;
909}
19957bb3 910
667503dd
JB		 911int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
912 struct net_device *dev,
913 u16 reason, bool wextev)
914{
915 int err;
916
917 wdev_lock(dev->ieee80211_ptr);
918 err = __cfg80211_disconnect(rdev, dev, reason, wextev);
919 wdev_unlock(dev->ieee80211_ptr);
920
921 return err;
922}
923
19957bb3
JB		 924void cfg80211_sme_disassoc(struct net_device *dev, int idx)
925{
926 struct wireless_dev *wdev = dev->ieee80211_ptr;
927 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
928 u8 bssid[ETH_ALEN];
929
667503dd
JB		 930 ASSERT_WDEV_LOCK(wdev);
931
19957bb3
JB		 932 if (!wdev->conn)
933 return;
934
935 if (wdev->conn->state == CFG80211_CONN_IDLE)
936 return;
937
938 /*
939 * Ok, so the association was made by this SME -- we don't
940 * want it any more so deauthenticate too.
941 */
942
943 if (!wdev->auth_bsses[idx])
944 return;
945
946 memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
ec3f1490
JB		 947 if (__cfg80211_mlme_deauth(rdev, dev, bssid,
948 NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
19957bb3
JB		 949 /* whatever -- assume gone anyway */
950 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
951 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
952 wdev->auth_bsses[idx] = NULL;
953 }
954}
Linux 6.x block layer and io_uring tree(s)