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Bluetooth: Replaced kzalloc and memcpy with kmemdup
[linux-2.6.git] / net / wireless / mlme.c
blobcaddca35d6865b4506d5d98466f54c7b82eabeba
1 /*
2 * cfg80211 MLME SAP interface
3 *
4 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/etherdevice.h>
10 #include <linux/netdevice.h>
11 #include <linux/nl80211.h>
12 #include <linux/slab.h>
13 #include <linux/wireless.h>
14 #include <net/cfg80211.h>
15 #include <net/iw_handler.h>
16 #include "core.h"
17 #include "nl80211.h"
18 #include "rdev-ops.h"
19
20
21 void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
22 {
23 struct wireless_dev *wdev = dev->ieee80211_ptr;
24 struct wiphy *wiphy = wdev->wiphy;
25 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
26
27 trace_cfg80211_send_rx_auth(dev);
28 wdev_lock(wdev);
29
30 nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
31 cfg80211_sme_rx_auth(dev, buf, len);
32
33 wdev_unlock(wdev);
34 }
35 EXPORT_SYMBOL(cfg80211_send_rx_auth);
36
37 void cfg80211_send_rx_assoc(struct net_device *dev, struct cfg80211_bss *bss,
38 const u8 *buf, size_t len)
39 {
40 u16 status_code;
41 struct wireless_dev *wdev = dev->ieee80211_ptr;
42 struct wiphy *wiphy = wdev->wiphy;
43 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
44 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
45 u8 *ie = mgmt->u.assoc_resp.variable;
46 int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
47
48 trace_cfg80211_send_rx_assoc(dev, bss);
49 wdev_lock(wdev);
50
51 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
52
53 /*
54 * This is a bit of a hack, we don't notify userspace of
55 * a (re-)association reply if we tried to send a reassoc
56 * and got a reject -- we only try again with an assoc
57 * frame instead of reassoc.
58 */
59 if (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
60 cfg80211_sme_failed_reassoc(wdev)) {
61 cfg80211_put_bss(wiphy, bss);
62 goto out;
63 }
64
65 nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);
66
67 if (status_code != WLAN_STATUS_SUCCESS && wdev->conn) {
68 cfg80211_sme_failed_assoc(wdev);
69 /*
70 * do not call connect_result() now because the
71 * sme will schedule work that does it later.
72 */
73 cfg80211_put_bss(wiphy, bss);
74 goto out;
75 }
76
77 if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
78 /*
79 * This is for the userspace SME, the CONNECTING
80 * state will be changed to CONNECTED by
81 * __cfg80211_connect_result() below.
82 */
83 wdev->sme_state = CFG80211_SME_CONNECTING;
84 }
85
86 /* this consumes the bss reference */
87 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
88 status_code,
89 status_code == WLAN_STATUS_SUCCESS, bss);
90 out:
91 wdev_unlock(wdev);
92 }
93 EXPORT_SYMBOL(cfg80211_send_rx_assoc);
94
95 void __cfg80211_send_deauth(struct net_device *dev,
96 const u8 *buf, size_t len)
97 {
98 struct wireless_dev *wdev = dev->ieee80211_ptr;
99 struct wiphy *wiphy = wdev->wiphy;
100 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
101 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
102 const u8 *bssid = mgmt->bssid;
103 bool was_current = false;
104
105 trace___cfg80211_send_deauth(dev);
106 ASSERT_WDEV_LOCK(wdev);
107
108 if (wdev->current_bss &&
109 ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
110 cfg80211_unhold_bss(wdev->current_bss);
111 cfg80211_put_bss(wiphy, &wdev->current_bss->pub);
112 wdev->current_bss = NULL;
113 was_current = true;
114 }
115
116 nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);
117
118 if (wdev->sme_state == CFG80211_SME_CONNECTED && was_current) {
119 u16 reason_code;
120 bool from_ap;
121
122 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
123
124 from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
125 __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
126 } else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
127 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
128 WLAN_STATUS_UNSPECIFIED_FAILURE,
129 false, NULL);
130 }
131 }
132 EXPORT_SYMBOL(__cfg80211_send_deauth);
133
134 void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len)
135 {
136 struct wireless_dev *wdev = dev->ieee80211_ptr;
137
138 wdev_lock(wdev);
139 __cfg80211_send_deauth(dev, buf, len);
140 wdev_unlock(wdev);
141 }
142 EXPORT_SYMBOL(cfg80211_send_deauth);
143
144 void __cfg80211_send_disassoc(struct net_device *dev,
145 const u8 *buf, size_t len)
146 {
147 struct wireless_dev *wdev = dev->ieee80211_ptr;
148 struct wiphy *wiphy = wdev->wiphy;
149 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
150 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
151 const u8 *bssid = mgmt->bssid;
152 u16 reason_code;
153 bool from_ap;
154
155 trace___cfg80211_send_disassoc(dev);
156 ASSERT_WDEV_LOCK(wdev);
157
158 nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL);
159
160 if (wdev->sme_state != CFG80211_SME_CONNECTED)
161 return;
162
163 if (wdev->current_bss &&
164 ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
165 cfg80211_sme_disassoc(dev, wdev->current_bss);
166 cfg80211_unhold_bss(wdev->current_bss);
167 cfg80211_put_bss(wiphy, &wdev->current_bss->pub);
168 wdev->current_bss = NULL;
169 } else
170 WARN_ON(1);
171
172
173 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
174
175 from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
176 __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
177 }
178 EXPORT_SYMBOL(__cfg80211_send_disassoc);
179
180 void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len)
181 {
182 struct wireless_dev *wdev = dev->ieee80211_ptr;
183
184 wdev_lock(wdev);
185 __cfg80211_send_disassoc(dev, buf, len);
186 wdev_unlock(wdev);
187 }
188 EXPORT_SYMBOL(cfg80211_send_disassoc);
189
190 void cfg80211_send_unprot_deauth(struct net_device *dev, const u8 *buf,
191 size_t len)
192 {
193 struct wireless_dev *wdev = dev->ieee80211_ptr;
194 struct wiphy *wiphy = wdev->wiphy;
195 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
196
197 trace_cfg80211_send_unprot_deauth(dev);
198 nl80211_send_unprot_deauth(rdev, dev, buf, len, GFP_ATOMIC);
199 }
200 EXPORT_SYMBOL(cfg80211_send_unprot_deauth);
201
202 void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf,
203 size_t len)
204 {
205 struct wireless_dev *wdev = dev->ieee80211_ptr;
206 struct wiphy *wiphy = wdev->wiphy;
207 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
208
209 trace_cfg80211_send_unprot_disassoc(dev);
210 nl80211_send_unprot_disassoc(rdev, dev, buf, len, GFP_ATOMIC);
211 }
212 EXPORT_SYMBOL(cfg80211_send_unprot_disassoc);
213
214 void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr)
215 {
216 struct wireless_dev *wdev = dev->ieee80211_ptr;
217 struct wiphy *wiphy = wdev->wiphy;
218 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
219
220 trace_cfg80211_send_auth_timeout(dev, addr);
221 wdev_lock(wdev);
222
223 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
224 if (wdev->sme_state == CFG80211_SME_CONNECTING)
225 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
226 WLAN_STATUS_UNSPECIFIED_FAILURE,
227 false, NULL);
228
229 wdev_unlock(wdev);
230 }
231 EXPORT_SYMBOL(cfg80211_send_auth_timeout);
232
233 void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr)
234 {
235 struct wireless_dev *wdev = dev->ieee80211_ptr;
236 struct wiphy *wiphy = wdev->wiphy;
237 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
238
239 trace_cfg80211_send_assoc_timeout(dev, addr);
240 wdev_lock(wdev);
241
242 nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
243 if (wdev->sme_state == CFG80211_SME_CONNECTING)
244 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
245 WLAN_STATUS_UNSPECIFIED_FAILURE,
246 false, NULL);
247
248 wdev_unlock(wdev);
249 }
250 EXPORT_SYMBOL(cfg80211_send_assoc_timeout);
251
252 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
253 enum nl80211_key_type key_type, int key_id,
254 const u8 *tsc, gfp_t gfp)
255 {
256 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
257 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
258 #ifdef CONFIG_CFG80211_WEXT
259 union iwreq_data wrqu;
260 char *buf = kmalloc(128, gfp);
261
262 if (buf) {
263 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
264 "keyid=%d %scast addr=%pM)", key_id,
265 key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
266 addr);
267 memset(&wrqu, 0, sizeof(wrqu));
268 wrqu.data.length = strlen(buf);
269 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
270 kfree(buf);
271 }
272 #endif
273
274 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
275 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
276 }
277 EXPORT_SYMBOL(cfg80211_michael_mic_failure);
278
279 /* some MLME handling for userspace SME */
280 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
281 struct net_device *dev,
282 struct ieee80211_channel *chan,
283 enum nl80211_auth_type auth_type,
284 const u8 *bssid,
285 const u8 *ssid, int ssid_len,
286 const u8 *ie, int ie_len,
287 const u8 *key, int key_len, int key_idx,
288 const u8 *sae_data, int sae_data_len)
289 {
290 struct wireless_dev *wdev = dev->ieee80211_ptr;
291 struct cfg80211_auth_request req;
292 int err;
293
294 ASSERT_WDEV_LOCK(wdev);
295
296 if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
297 if (!key || !key_len || key_idx < 0 || key_idx > 4)
298 return -EINVAL;
299
300 if (wdev->current_bss &&
301 ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
302 return -EALREADY;
303
304 memset(&req, 0, sizeof(req));
305
306 req.ie = ie;
307 req.ie_len = ie_len;
308 req.sae_data = sae_data;
309 req.sae_data_len = sae_data_len;
310 req.auth_type = auth_type;
311 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
312 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
313 req.key = key;
314 req.key_len = key_len;
315 req.key_idx = key_idx;
316 if (!req.bss)
317 return -ENOENT;
318
319 err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
320 CHAN_MODE_SHARED);
321 if (err)
322 goto out;
323
324 err = rdev_auth(rdev, dev, &req);
325
326 out:
327 cfg80211_put_bss(&rdev->wiphy, req.bss);
328 return err;
329 }
330
331 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
332 struct net_device *dev, struct ieee80211_channel *chan,
333 enum nl80211_auth_type auth_type, const u8 *bssid,
334 const u8 *ssid, int ssid_len,
335 const u8 *ie, int ie_len,
336 const u8 *key, int key_len, int key_idx,
337 const u8 *sae_data, int sae_data_len)
338 {
339 int err;
340
341 mutex_lock(&rdev->devlist_mtx);
342 wdev_lock(dev->ieee80211_ptr);
343 err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
344 ssid, ssid_len, ie, ie_len,
345 key, key_len, key_idx,
346 sae_data, sae_data_len);
347 wdev_unlock(dev->ieee80211_ptr);
348 mutex_unlock(&rdev->devlist_mtx);
349
350 return err;
351 }
352
353 /* Do a logical ht_capa &= ht_capa_mask. */
354 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
355 const struct ieee80211_ht_cap *ht_capa_mask)
356 {
357 int i;
358 u8 *p1, *p2;
359 if (!ht_capa_mask) {
360 memset(ht_capa, 0, sizeof(*ht_capa));
361 return;
362 }
363
364 p1 = (u8*)(ht_capa);
365 p2 = (u8*)(ht_capa_mask);
366 for (i = 0; i<sizeof(*ht_capa); i++)
367 p1[i] &= p2[i];
368 }
369
370 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
371 struct net_device *dev,
372 struct ieee80211_channel *chan,
373 const u8 *bssid, const u8 *prev_bssid,
374 const u8 *ssid, int ssid_len,
375 const u8 *ie, int ie_len, bool use_mfp,
376 struct cfg80211_crypto_settings *crypt,
377 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
378 struct ieee80211_ht_cap *ht_capa_mask)
379 {
380 struct wireless_dev *wdev = dev->ieee80211_ptr;
381 struct cfg80211_assoc_request req;
382 int err;
383 bool was_connected = false;
384
385 ASSERT_WDEV_LOCK(wdev);
386
387 memset(&req, 0, sizeof(req));
388
389 if (wdev->current_bss && prev_bssid &&
390 ether_addr_equal(wdev->current_bss->pub.bssid, prev_bssid)) {
391 /*
392 * Trying to reassociate: Allow this to proceed and let the old
393 * association to be dropped when the new one is completed.
394 */
395 if (wdev->sme_state == CFG80211_SME_CONNECTED) {
396 was_connected = true;
397 wdev->sme_state = CFG80211_SME_CONNECTING;
398 }
399 } else if (wdev->current_bss)
400 return -EALREADY;
401
402 req.ie = ie;
403 req.ie_len = ie_len;
404 memcpy(&req.crypto, crypt, sizeof(req.crypto));
405 req.use_mfp = use_mfp;
406 req.prev_bssid = prev_bssid;
407 req.flags = assoc_flags;
408 if (ht_capa)
409 memcpy(&req.ht_capa, ht_capa, sizeof(req.ht_capa));
410 if (ht_capa_mask)
411 memcpy(&req.ht_capa_mask, ht_capa_mask,
412 sizeof(req.ht_capa_mask));
413 cfg80211_oper_and_ht_capa(&req.ht_capa_mask,
414 rdev->wiphy.ht_capa_mod_mask);
415
416 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
417 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
418 if (!req.bss) {
419 if (was_connected)
420 wdev->sme_state = CFG80211_SME_CONNECTED;
421 return -ENOENT;
422 }
423
424 err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
425 CHAN_MODE_SHARED);
426 if (err)
427 goto out;
428
429 err = rdev_assoc(rdev, dev, &req);
430
431 out:
432 if (err) {
433 if (was_connected)
434 wdev->sme_state = CFG80211_SME_CONNECTED;
435 cfg80211_put_bss(&rdev->wiphy, req.bss);
436 }
437
438 return err;
439 }
440
441 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
442 struct net_device *dev,
443 struct ieee80211_channel *chan,
444 const u8 *bssid, const u8 *prev_bssid,
445 const u8 *ssid, int ssid_len,
446 const u8 *ie, int ie_len, bool use_mfp,
447 struct cfg80211_crypto_settings *crypt,
448 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
449 struct ieee80211_ht_cap *ht_capa_mask)
450 {
451 struct wireless_dev *wdev = dev->ieee80211_ptr;
452 int err;
453
454 mutex_lock(&rdev->devlist_mtx);
455 wdev_lock(wdev);
456 err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
457 ssid, ssid_len, ie, ie_len, use_mfp, crypt,
458 assoc_flags, ht_capa, ht_capa_mask);
459 wdev_unlock(wdev);
460 mutex_unlock(&rdev->devlist_mtx);
461
462 return err;
463 }
464
465 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
466 struct net_device *dev, const u8 *bssid,
467 const u8 *ie, int ie_len, u16 reason,
468 bool local_state_change)
469 {
470 struct wireless_dev *wdev = dev->ieee80211_ptr;
471 struct cfg80211_deauth_request req = {
472 .bssid = bssid,
473 .reason_code = reason,
474 .ie = ie,
475 .ie_len = ie_len,
476 .local_state_change = local_state_change,
477 };
478
479 ASSERT_WDEV_LOCK(wdev);
480
481 if (local_state_change && (!wdev->current_bss ||
482 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
483 return 0;
484
485 return rdev_deauth(rdev, dev, &req);
486 }
487
488 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
489 struct net_device *dev, const u8 *bssid,
490 const u8 *ie, int ie_len, u16 reason,
491 bool local_state_change)
492 {
493 struct wireless_dev *wdev = dev->ieee80211_ptr;
494 int err;
495
496 wdev_lock(wdev);
497 err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason,
498 local_state_change);
499 wdev_unlock(wdev);
500
501 return err;
502 }
503
504 static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
505 struct net_device *dev, const u8 *bssid,
506 const u8 *ie, int ie_len, u16 reason,
507 bool local_state_change)
508 {
509 struct wireless_dev *wdev = dev->ieee80211_ptr;
510 struct cfg80211_disassoc_request req;
511
512 ASSERT_WDEV_LOCK(wdev);
513
514 if (wdev->sme_state != CFG80211_SME_CONNECTED)
515 return -ENOTCONN;
516
517 if (WARN(!wdev->current_bss, "sme_state=%d\n", wdev->sme_state))
518 return -ENOTCONN;
519
520 memset(&req, 0, sizeof(req));
521 req.reason_code = reason;
522 req.local_state_change = local_state_change;
523 req.ie = ie;
524 req.ie_len = ie_len;
525 if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
526 req.bss = &wdev->current_bss->pub;
527 else
528 return -ENOTCONN;
529
530 return rdev_disassoc(rdev, dev, &req);
531 }
532
533 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
534 struct net_device *dev, const u8 *bssid,
535 const u8 *ie, int ie_len, u16 reason,
536 bool local_state_change)
537 {
538 struct wireless_dev *wdev = dev->ieee80211_ptr;
539 int err;
540
541 wdev_lock(wdev);
542 err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason,
543 local_state_change);
544 wdev_unlock(wdev);
545
546 return err;
547 }
548
549 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
550 struct net_device *dev)
551 {
552 struct wireless_dev *wdev = dev->ieee80211_ptr;
553 struct cfg80211_deauth_request req;
554 u8 bssid[ETH_ALEN];
555
556 ASSERT_WDEV_LOCK(wdev);
557
558 if (!rdev->ops->deauth)
559 return;
560
561 memset(&req, 0, sizeof(req));
562 req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
563 req.ie = NULL;
564 req.ie_len = 0;
565
566 if (!wdev->current_bss)
567 return;
568
569 memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
570 req.bssid = bssid;
571 rdev_deauth(rdev, dev, &req);
572
573 if (wdev->current_bss) {
574 cfg80211_unhold_bss(wdev->current_bss);
575 cfg80211_put_bss(&rdev->wiphy, &wdev->current_bss->pub);
576 wdev->current_bss = NULL;
577 }
578 }
579
580 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
581 struct ieee80211_channel *chan,
582 unsigned int duration, gfp_t gfp)
583 {
584 struct wiphy *wiphy = wdev->wiphy;
585 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
586
587 trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
588 nl80211_send_remain_on_channel(rdev, wdev, cookie, chan, duration, gfp);
589 }
590 EXPORT_SYMBOL(cfg80211_ready_on_channel);
591
592 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
593 struct ieee80211_channel *chan,
594 gfp_t gfp)
595 {
596 struct wiphy *wiphy = wdev->wiphy;
597 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
598
599 trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
600 nl80211_send_remain_on_channel_cancel(rdev, wdev, cookie, chan, gfp);
601 }
602 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
603
604 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
605 struct station_info *sinfo, gfp_t gfp)
606 {
607 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
608 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
609
610 trace_cfg80211_new_sta(dev, mac_addr, sinfo);
611 nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp);
612 }
613 EXPORT_SYMBOL(cfg80211_new_sta);
614
615 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
616 {
617 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
618 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
619
620 trace_cfg80211_del_sta(dev, mac_addr);
621 nl80211_send_sta_del_event(rdev, dev, mac_addr, gfp);
622 }
623 EXPORT_SYMBOL(cfg80211_del_sta);
624
625 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
626 enum nl80211_connect_failed_reason reason,
627 gfp_t gfp)
628 {
629 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
630 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
631
632 nl80211_send_conn_failed_event(rdev, dev, mac_addr, reason, gfp);
633 }
634 EXPORT_SYMBOL(cfg80211_conn_failed);
635
636 struct cfg80211_mgmt_registration {
637 struct list_head list;
638
639 u32 nlportid;
640
641 int match_len;
642
643 __le16 frame_type;
644
645 u8 match[];
646 };
647
648 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
649 u16 frame_type, const u8 *match_data,
650 int match_len)
651 {
652 struct wiphy *wiphy = wdev->wiphy;
653 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
654 struct cfg80211_mgmt_registration *reg, *nreg;
655 int err = 0;
656 u16 mgmt_type;
657
658 if (!wdev->wiphy->mgmt_stypes)
659 return -EOPNOTSUPP;
660
661 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
662 return -EINVAL;
663
664 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
665 return -EINVAL;
666
667 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
668 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
669 return -EINVAL;
670
671 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
672 if (!nreg)
673 return -ENOMEM;
674
675 spin_lock_bh(&wdev->mgmt_registrations_lock);
676
677 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
678 int mlen = min(match_len, reg->match_len);
679
680 if (frame_type != le16_to_cpu(reg->frame_type))
681 continue;
682
683 if (memcmp(reg->match, match_data, mlen) == 0) {
684 err = -EALREADY;
685 break;
686 }
687 }
688
689 if (err) {
690 kfree(nreg);
691 goto out;
692 }
693
694 memcpy(nreg->match, match_data, match_len);
695 nreg->match_len = match_len;
696 nreg->nlportid = snd_portid;
697 nreg->frame_type = cpu_to_le16(frame_type);
698 list_add(&nreg->list, &wdev->mgmt_registrations);
699
700 if (rdev->ops->mgmt_frame_register)
701 rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
702
703 out:
704 spin_unlock_bh(&wdev->mgmt_registrations_lock);
705
706 return err;
707 }
708
709 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
710 {
711 struct wiphy *wiphy = wdev->wiphy;
712 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
713 struct cfg80211_mgmt_registration *reg, *tmp;
714
715 spin_lock_bh(&wdev->mgmt_registrations_lock);
716
717 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
718 if (reg->nlportid != nlportid)
719 continue;
720
721 if (rdev->ops->mgmt_frame_register) {
722 u16 frame_type = le16_to_cpu(reg->frame_type);
723
724 rdev_mgmt_frame_register(rdev, wdev,
725 frame_type, false);
726 }
727
728 list_del(&reg->list);
729 kfree(reg);
730 }
731
732 spin_unlock_bh(&wdev->mgmt_registrations_lock);
733
734 if (nlportid == wdev->ap_unexpected_nlportid)
735 wdev->ap_unexpected_nlportid = 0;
736 }
737
738 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
739 {
740 struct cfg80211_mgmt_registration *reg, *tmp;
741
742 spin_lock_bh(&wdev->mgmt_registrations_lock);
743
744 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
745 list_del(&reg->list);
746 kfree(reg);
747 }
748
749 spin_unlock_bh(&wdev->mgmt_registrations_lock);
750 }
751
752 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
753 struct wireless_dev *wdev,
754 struct ieee80211_channel *chan, bool offchan,
755 unsigned int wait, const u8 *buf, size_t len,
756 bool no_cck, bool dont_wait_for_ack, u64 *cookie)
757 {
758 const struct ieee80211_mgmt *mgmt;
759 u16 stype;
760
761 if (!wdev->wiphy->mgmt_stypes)
762 return -EOPNOTSUPP;
763
764 if (!rdev->ops->mgmt_tx)
765 return -EOPNOTSUPP;
766
767 if (len < 24 + 1)
768 return -EINVAL;
769
770 mgmt = (const struct ieee80211_mgmt *) buf;
771
772 if (!ieee80211_is_mgmt(mgmt->frame_control))
773 return -EINVAL;
774
775 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
776 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
777 return -EINVAL;
778
779 if (ieee80211_is_action(mgmt->frame_control) &&
780 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
781 int err = 0;
782
783 wdev_lock(wdev);
784
785 switch (wdev->iftype) {
786 case NL80211_IFTYPE_ADHOC:
787 case NL80211_IFTYPE_STATION:
788 case NL80211_IFTYPE_P2P_CLIENT:
789 if (!wdev->current_bss) {
790 err = -ENOTCONN;
791 break;
792 }
793
794 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
795 mgmt->bssid)) {
796 err = -ENOTCONN;
797 break;
798 }
799
800 /*
801 * check for IBSS DA must be done by driver as
802 * cfg80211 doesn't track the stations
803 */
804 if (wdev->iftype == NL80211_IFTYPE_ADHOC)
805 break;
806
807 /* for station, check that DA is the AP */
808 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
809 mgmt->da)) {
810 err = -ENOTCONN;
811 break;
812 }
813 break;
814 case NL80211_IFTYPE_AP:
815 case NL80211_IFTYPE_P2P_GO:
816 case NL80211_IFTYPE_AP_VLAN:
817 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
818 err = -EINVAL;
819 break;
820 case NL80211_IFTYPE_MESH_POINT:
821 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
822 err = -EINVAL;
823 break;
824 }
825 /*
826 * check for mesh DA must be done by driver as
827 * cfg80211 doesn't track the stations
828 */
829 break;
830 case NL80211_IFTYPE_P2P_DEVICE:
831 /*
832 * fall through, P2P device only supports
833 * public action frames
834 */
835 default:
836 err = -EOPNOTSUPP;
837 break;
838 }
839 wdev_unlock(wdev);
840
841 if (err)
842 return err;
843 }
844
845 if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
846 return -EINVAL;
847
848 /* Transmit the Action frame as requested by user space */
849 return rdev_mgmt_tx(rdev, wdev, chan, offchan,
850 wait, buf, len, no_cck, dont_wait_for_ack,
851 cookie);
852 }
853
854 bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
855 const u8 *buf, size_t len, gfp_t gfp)
856 {
857 struct wiphy *wiphy = wdev->wiphy;
858 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
859 struct cfg80211_mgmt_registration *reg;
860 const struct ieee80211_txrx_stypes *stypes =
861 &wiphy->mgmt_stypes[wdev->iftype];
862 struct ieee80211_mgmt *mgmt = (void *)buf;
863 const u8 *data;
864 int data_len;
865 bool result = false;
866 __le16 ftype = mgmt->frame_control &
867 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
868 u16 stype;
869
870 trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm);
871 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
872
873 if (!(stypes->rx & BIT(stype))) {
874 trace_cfg80211_return_bool(false);
875 return false;
876 }
877
878 data = buf + ieee80211_hdrlen(mgmt->frame_control);
879 data_len = len - ieee80211_hdrlen(mgmt->frame_control);
880
881 spin_lock_bh(&wdev->mgmt_registrations_lock);
882
883 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
884 if (reg->frame_type != ftype)
885 continue;
886
887 if (reg->match_len > data_len)
888 continue;
889
890 if (memcmp(reg->match, data, reg->match_len))
891 continue;
892
893 /* found match! */
894
895 /* Indicate the received Action frame to user space */
896 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
897 freq, sig_mbm,
898 buf, len, gfp))
899 continue;
900
901 result = true;
902 break;
903 }
904
905 spin_unlock_bh(&wdev->mgmt_registrations_lock);
906
907 trace_cfg80211_return_bool(result);
908 return result;
909 }
910 EXPORT_SYMBOL(cfg80211_rx_mgmt);
911
912 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
913 const u8 *buf, size_t len, bool ack, gfp_t gfp)
914 {
915 struct wiphy *wiphy = wdev->wiphy;
916 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
917
918 trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
919
920 /* Indicate TX status of the Action frame to user space */
921 nl80211_send_mgmt_tx_status(rdev, wdev, cookie, buf, len, ack, gfp);
922 }
923 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
924
925 void cfg80211_cqm_rssi_notify(struct net_device *dev,
926 enum nl80211_cqm_rssi_threshold_event rssi_event,
927 gfp_t gfp)
928 {
929 struct wireless_dev *wdev = dev->ieee80211_ptr;
930 struct wiphy *wiphy = wdev->wiphy;
931 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
932
933 trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
934
935 /* Indicate roaming trigger event to user space */
936 nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp);
937 }
938 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
939
940 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
941 const u8 *peer, u32 num_packets, gfp_t gfp)
942 {
943 struct wireless_dev *wdev = dev->ieee80211_ptr;
944 struct wiphy *wiphy = wdev->wiphy;
945 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
946
947 trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
948
949 /* Indicate roaming trigger event to user space */
950 nl80211_send_cqm_pktloss_notify(rdev, dev, peer, num_packets, gfp);
951 }
952 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
953
954 void cfg80211_cqm_txe_notify(struct net_device *dev,
955 const u8 *peer, u32 num_packets,
956 u32 rate, u32 intvl, gfp_t gfp)
957 {
958 struct wireless_dev *wdev = dev->ieee80211_ptr;
959 struct wiphy *wiphy = wdev->wiphy;
960 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
961
962 nl80211_send_cqm_txe_notify(rdev, dev, peer, num_packets,
963 rate, intvl, gfp);
964 }
965 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
966
967 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
968 const u8 *replay_ctr, gfp_t gfp)
969 {
970 struct wireless_dev *wdev = dev->ieee80211_ptr;
971 struct wiphy *wiphy = wdev->wiphy;
972 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
973
974 trace_cfg80211_gtk_rekey_notify(dev, bssid);
975 nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
976 }
977 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
978
979 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
980 const u8 *bssid, bool preauth, gfp_t gfp)
981 {
982 struct wireless_dev *wdev = dev->ieee80211_ptr;
983 struct wiphy *wiphy = wdev->wiphy;
984 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
985
986 trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
987 nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
988 }
989 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
990
991 void cfg80211_dfs_channels_update_work(struct work_struct *work)
992 {
993 struct delayed_work *delayed_work;
994 struct cfg80211_registered_device *rdev;
995 struct cfg80211_chan_def chandef;
996 struct ieee80211_supported_band *sband;
997 struct ieee80211_channel *c;
998 struct wiphy *wiphy;
999 bool check_again = false;
1000 unsigned long timeout, next_time = 0;
1001 int bandid, i;
1002
1003 delayed_work = container_of(work, struct delayed_work, work);
1004 rdev = container_of(delayed_work, struct cfg80211_registered_device,
1005 dfs_update_channels_wk);
1006 wiphy = &rdev->wiphy;
1007
1008 mutex_lock(&cfg80211_mutex);
1009 for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) {
1010 sband = wiphy->bands[bandid];
1011 if (!sband)
1012 continue;
1013
1014 for (i = 0; i < sband->n_channels; i++) {
1015 c = &sband->channels[i];
1016
1017 if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
1018 continue;
1019
1020 timeout = c->dfs_state_entered +
1021 IEEE80211_DFS_MIN_NOP_TIME_MS;
1022
1023 if (time_after_eq(jiffies, timeout)) {
1024 c->dfs_state = NL80211_DFS_USABLE;
1025 cfg80211_chandef_create(&chandef, c,
1026 NL80211_CHAN_NO_HT);
1027
1028 nl80211_radar_notify(rdev, &chandef,
1029 NL80211_RADAR_NOP_FINISHED,
1030 NULL, GFP_ATOMIC);
1031 continue;
1032 }
1033
1034 if (!check_again)
1035 next_time = timeout - jiffies;
1036 else
1037 next_time = min(next_time, timeout - jiffies);
1038 check_again = true;
1039 }
1040 }
1041 mutex_unlock(&cfg80211_mutex);
1042
1043 /* reschedule if there are other channels waiting to be cleared again */
1044 if (check_again)
1045 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
1046 next_time);
1047 }
1048
1049
1050 void cfg80211_radar_event(struct wiphy *wiphy,
1051 struct cfg80211_chan_def *chandef,
1052 gfp_t gfp)
1053 {
1054 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
1055 unsigned long timeout;
1056
1057 trace_cfg80211_radar_event(wiphy, chandef);
1058
1059 /* only set the chandef supplied channel to unavailable, in
1060 * case the radar is detected on only one of multiple channels
1061 * spanned by the chandef.
1062 */
1063 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
1064
1065 timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS);
1066 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
1067 timeout);
1068
1069 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
1070 }
1071 EXPORT_SYMBOL(cfg80211_radar_event);
1072
1073 void cfg80211_cac_event(struct net_device *netdev,
1074 enum nl80211_radar_event event, gfp_t gfp)
1075 {
1076 struct wireless_dev *wdev = netdev->ieee80211_ptr;
1077 struct wiphy *wiphy = wdev->wiphy;
1078 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
1079 struct cfg80211_chan_def chandef;
1080 unsigned long timeout;
1081
1082 trace_cfg80211_cac_event(netdev, event);
1083
1084 if (WARN_ON(!wdev->cac_started))
1085 return;
1086
1087 if (WARN_ON(!wdev->channel))
1088 return;
1089
1090 cfg80211_chandef_create(&chandef, wdev->channel, NL80211_CHAN_NO_HT);
1091
1092 switch (event) {
1093 case NL80211_RADAR_CAC_FINISHED:
1094 timeout = wdev->cac_start_time +
1095 msecs_to_jiffies(IEEE80211_DFS_MIN_CAC_TIME_MS);
1096 WARN_ON(!time_after_eq(jiffies, timeout));
1097 cfg80211_set_dfs_state(wiphy, &chandef, NL80211_DFS_AVAILABLE);
1098 break;
1099 case NL80211_RADAR_CAC_ABORTED:
1100 break;
1101 default:
1102 WARN_ON(1);
1103 return;
1104 }
1105 wdev->cac_started = false;
1106
1107 nl80211_radar_notify(rdev, &chandef, event, netdev, gfp);
1108 }
1109 EXPORT_SYMBOL(cfg80211_cac_event);
Linus' kernel tree