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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> |
11 | #include <linux/wireless.h> |
12 | #include <net/iw_handler.h> |
13 | #include <net/cfg80211.h> |
14 | #include <net/rtnetlink.h> |
15 | #include "nl80211.h" |
16 | #include "reg.h" |
17 | |
18 | struct 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, |
29 | CFG80211_CONN_DEAUTH_ASSOC_FAIL, |
30 | } state; |
31 | u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; |
32 | u8 *ie; |
33 | size_t ie_len; |
34 | bool auto_auth, prev_bssid_valid; |
35 | }; |
36 | |
37 | |
38 | static int cfg80211_conn_scan(struct wireless_dev *wdev) |
39 | { |
40 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
41 | struct cfg80211_scan_request *request; |
42 | int n_channels, err; |
43 | |
44 | ASSERT_RTNL(); |
45 | ASSERT_RDEV_LOCK(rdev); |
46 | ASSERT_WDEV_LOCK(wdev); |
47 | |
48 | if (rdev->scan_req) |
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 | |
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; |
85 | request->ssids = (void *)&request->channels[n_channels]; |
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 | |
92 | request->dev = wdev->netdev; |
93 | request->wiphy = &rdev->wiphy; |
94 | |
95 | rdev->scan_req = request; |
96 | |
97 | err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request); |
98 | if (!err) { |
99 | wdev->conn->state = CFG80211_CONN_SCANNING; |
100 | nl80211_send_scan_start(rdev, wdev->netdev); |
101 | dev_hold(wdev->netdev); |
102 | } else { |
103 | rdev->scan_req = NULL; |
104 | kfree(request); |
105 | } |
106 | return err; |
107 | } |
108 | |
109 | static int cfg80211_conn_do_work(struct wireless_dev *wdev) |
110 | { |
111 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
112 | struct cfg80211_connect_params *params; |
113 | const u8 *prev_bssid = NULL; |
114 | int err; |
115 | |
116 | ASSERT_WDEV_LOCK(wdev); |
117 | |
118 | if (!wdev->conn) |
119 | return 0; |
120 | |
121 | params = &wdev->conn->params; |
122 | |
123 | switch (wdev->conn->state) { |
124 | case CFG80211_CONN_SCAN_AGAIN: |
125 | return cfg80211_conn_scan(wdev); |
126 | case CFG80211_CONN_AUTHENTICATE_NEXT: |
127 | BUG_ON(!rdev->ops->auth); |
128 | wdev->conn->state = CFG80211_CONN_AUTHENTICATING; |
129 | return __cfg80211_mlme_auth(rdev, wdev->netdev, |
130 | params->channel, params->auth_type, |
131 | params->bssid, |
132 | params->ssid, params->ssid_len, |
133 | NULL, 0, |
134 | params->key, params->key_len, |
135 | params->key_idx); |
136 | case CFG80211_CONN_ASSOCIATE_NEXT: |
137 | BUG_ON(!rdev->ops->assoc); |
138 | wdev->conn->state = CFG80211_CONN_ASSOCIATING; |
139 | if (wdev->conn->prev_bssid_valid) |
140 | prev_bssid = wdev->conn->prev_bssid; |
141 | err = __cfg80211_mlme_assoc(rdev, wdev->netdev, |
142 | params->channel, params->bssid, |
143 | prev_bssid, |
144 | params->ssid, params->ssid_len, |
145 | params->ie, params->ie_len, |
146 | false, ¶ms->crypto); |
147 | if (err) |
148 | __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, |
149 | NULL, 0, |
150 | WLAN_REASON_DEAUTH_LEAVING); |
151 | return err; |
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; |
158 | default: |
159 | return 0; |
160 | } |
161 | } |
162 | |
163 | void cfg80211_conn_work(struct work_struct *work) |
164 | { |
165 | struct cfg80211_registered_device *rdev = |
166 | container_of(work, struct cfg80211_registered_device, conn_work); |
167 | struct wireless_dev *wdev; |
168 | u8 bssid_buf[ETH_ALEN], *bssid = NULL; |
169 | |
170 | rtnl_lock(); |
171 | cfg80211_lock_rdev(rdev); |
172 | mutex_lock(&rdev->devlist_mtx); |
173 | |
174 | list_for_each_entry(wdev, &rdev->netdev_list, list) { |
175 | wdev_lock(wdev); |
176 | if (!netif_running(wdev->netdev)) { |
177 | wdev_unlock(wdev); |
178 | continue; |
179 | } |
180 | if (wdev->sme_state != CFG80211_SME_CONNECTING) { |
181 | wdev_unlock(wdev); |
182 | continue; |
183 | } |
184 | if (wdev->conn->params.bssid) { |
185 | memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); |
186 | bssid = bssid_buf; |
187 | } |
188 | if (cfg80211_conn_do_work(wdev)) |
189 | __cfg80211_connect_result( |
190 | wdev->netdev, bssid, |
191 | NULL, 0, NULL, 0, |
192 | WLAN_STATUS_UNSPECIFIED_FAILURE, |
193 | false, NULL); |
194 | wdev_unlock(wdev); |
195 | } |
196 | |
197 | mutex_unlock(&rdev->devlist_mtx); |
198 | cfg80211_unlock_rdev(rdev); |
199 | rtnl_unlock(); |
200 | } |
201 | |
202 | static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) |
203 | { |
204 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
205 | struct cfg80211_bss *bss; |
206 | u16 capa = WLAN_CAPABILITY_ESS; |
207 | |
208 | ASSERT_WDEV_LOCK(wdev); |
209 | |
210 | if (wdev->conn->params.privacy) |
211 | capa |= WLAN_CAPABILITY_PRIVACY; |
212 | |
213 | bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid, |
214 | wdev->conn->params.ssid, |
215 | wdev->conn->params.ssid_len, |
216 | WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, |
217 | capa); |
218 | if (!bss) |
219 | return NULL; |
220 | |
221 | memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); |
222 | wdev->conn->params.bssid = wdev->conn->bssid; |
223 | wdev->conn->params.channel = bss->channel; |
224 | wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; |
225 | schedule_work(&rdev->conn_work); |
226 | |
227 | return bss; |
228 | } |
229 | |
230 | static void __cfg80211_sme_scan_done(struct net_device *dev) |
231 | { |
232 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
233 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
234 | struct cfg80211_bss *bss; |
235 | |
236 | ASSERT_WDEV_LOCK(wdev); |
237 | |
238 | if (wdev->sme_state != CFG80211_SME_CONNECTING) |
239 | return; |
240 | |
241 | if (!wdev->conn) |
242 | return; |
243 | |
244 | if (wdev->conn->state != CFG80211_CONN_SCANNING && |
245 | wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) |
246 | return; |
247 | |
248 | bss = cfg80211_get_conn_bss(wdev); |
249 | if (bss) { |
250 | cfg80211_put_bss(bss); |
251 | } else { |
252 | /* not found */ |
253 | if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) |
254 | schedule_work(&rdev->conn_work); |
255 | else |
256 | __cfg80211_connect_result( |
257 | wdev->netdev, |
258 | wdev->conn->params.bssid, |
259 | NULL, 0, NULL, 0, |
260 | WLAN_STATUS_UNSPECIFIED_FAILURE, |
261 | false, NULL); |
262 | } |
263 | } |
264 | |
265 | void cfg80211_sme_scan_done(struct net_device *dev) |
266 | { |
267 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
268 | |
269 | mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); |
270 | wdev_lock(wdev); |
271 | __cfg80211_sme_scan_done(dev); |
272 | wdev_unlock(wdev); |
273 | mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); |
274 | } |
275 | |
276 | void cfg80211_sme_rx_auth(struct net_device *dev, |
277 | const u8 *buf, size_t len) |
278 | { |
279 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
280 | struct wiphy *wiphy = wdev->wiphy; |
281 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
282 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; |
283 | u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); |
284 | |
285 | ASSERT_WDEV_LOCK(wdev); |
286 | |
287 | /* should only RX auth frames when connecting */ |
288 | if (wdev->sme_state != CFG80211_SME_CONNECTING) |
289 | return; |
290 | |
291 | if (WARN_ON(!wdev->conn)) |
292 | return; |
293 | |
294 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && |
295 | wdev->conn->auto_auth && |
296 | wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { |
297 | /* select automatically between only open, shared, leap */ |
298 | switch (wdev->conn->params.auth_type) { |
299 | case NL80211_AUTHTYPE_OPEN_SYSTEM: |
300 | if (wdev->connect_keys) |
301 | wdev->conn->params.auth_type = |
302 | NL80211_AUTHTYPE_SHARED_KEY; |
303 | else |
304 | wdev->conn->params.auth_type = |
305 | NL80211_AUTHTYPE_NETWORK_EAP; |
306 | break; |
307 | case NL80211_AUTHTYPE_SHARED_KEY: |
308 | wdev->conn->params.auth_type = |
309 | NL80211_AUTHTYPE_NETWORK_EAP; |
310 | break; |
311 | default: |
312 | /* huh? */ |
313 | wdev->conn->params.auth_type = |
314 | NL80211_AUTHTYPE_OPEN_SYSTEM; |
315 | break; |
316 | } |
317 | wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; |
318 | schedule_work(&rdev->conn_work); |
319 | } else if (status_code != WLAN_STATUS_SUCCESS) { |
320 | __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, |
321 | status_code, false, NULL); |
322 | } else if (wdev->sme_state == CFG80211_SME_CONNECTING && |
323 | wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { |
324 | wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; |
325 | schedule_work(&rdev->conn_work); |
326 | } |
327 | } |
328 | |
329 | bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev) |
330 | { |
331 | struct wiphy *wiphy = wdev->wiphy; |
332 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
333 | |
334 | if (WARN_ON(!wdev->conn)) |
335 | return false; |
336 | |
337 | if (!wdev->conn->prev_bssid_valid) |
338 | return false; |
339 | |
340 | /* |
341 | * Some stupid APs don't accept reassoc, so we |
342 | * need to fall back to trying regular assoc. |
343 | */ |
344 | wdev->conn->prev_bssid_valid = false; |
345 | wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; |
346 | schedule_work(&rdev->conn_work); |
347 | |
348 | return true; |
349 | } |
350 | |
351 | void cfg80211_sme_failed_assoc(struct wireless_dev *wdev) |
352 | { |
353 | struct wiphy *wiphy = wdev->wiphy; |
354 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
355 | |
356 | wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL; |
357 | schedule_work(&rdev->conn_work); |
358 | } |
359 | |
360 | void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, |
361 | const u8 *req_ie, size_t req_ie_len, |
362 | const u8 *resp_ie, size_t resp_ie_len, |
363 | u16 status, bool wextev, |
364 | struct cfg80211_bss *bss) |
365 | { |
366 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
367 | u8 *country_ie; |
368 | #ifdef CONFIG_WIRELESS_EXT |
369 | union iwreq_data wrqu; |
370 | #endif |
371 | |
372 | ASSERT_WDEV_LOCK(wdev); |
373 | |
374 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) |
375 | return; |
376 | |
377 | if (wdev->sme_state != CFG80211_SME_CONNECTING) |
378 | return; |
379 | |
380 | nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, |
381 | bssid, req_ie, req_ie_len, |
382 | resp_ie, resp_ie_len, |
383 | status, GFP_KERNEL); |
384 | |
385 | #ifdef CONFIG_WIRELESS_EXT |
386 | if (wextev) { |
387 | if (req_ie && status == WLAN_STATUS_SUCCESS) { |
388 | memset(&wrqu, 0, sizeof(wrqu)); |
389 | wrqu.data.length = req_ie_len; |
390 | wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); |
391 | } |
392 | |
393 | if (resp_ie && status == WLAN_STATUS_SUCCESS) { |
394 | memset(&wrqu, 0, sizeof(wrqu)); |
395 | wrqu.data.length = resp_ie_len; |
396 | wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); |
397 | } |
398 | |
399 | memset(&wrqu, 0, sizeof(wrqu)); |
400 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
401 | if (bssid && status == WLAN_STATUS_SUCCESS) { |
402 | memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); |
403 | memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); |
404 | wdev->wext.prev_bssid_valid = true; |
405 | } |
406 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); |
407 | } |
408 | #endif |
409 | |
410 | if (wdev->current_bss) { |
411 | cfg80211_unhold_bss(wdev->current_bss); |
412 | cfg80211_put_bss(&wdev->current_bss->pub); |
413 | wdev->current_bss = NULL; |
414 | } |
415 | |
416 | if (wdev->conn) |
417 | wdev->conn->state = CFG80211_CONN_IDLE; |
418 | |
419 | if (status != WLAN_STATUS_SUCCESS) { |
420 | wdev->sme_state = CFG80211_SME_IDLE; |
421 | if (wdev->conn) |
422 | kfree(wdev->conn->ie); |
423 | kfree(wdev->conn); |
424 | wdev->conn = NULL; |
425 | kfree(wdev->connect_keys); |
426 | wdev->connect_keys = NULL; |
427 | wdev->ssid_len = 0; |
428 | return; |
429 | } |
430 | |
431 | if (!bss) |
432 | bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, |
433 | wdev->ssid, wdev->ssid_len, |
434 | WLAN_CAPABILITY_ESS, |
435 | WLAN_CAPABILITY_ESS); |
436 | |
437 | if (WARN_ON(!bss)) |
438 | return; |
439 | |
440 | cfg80211_hold_bss(bss_from_pub(bss)); |
441 | wdev->current_bss = bss_from_pub(bss); |
442 | |
443 | wdev->sme_state = CFG80211_SME_CONNECTED; |
444 | cfg80211_upload_connect_keys(wdev); |
445 | |
446 | country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); |
447 | |
448 | if (!country_ie) |
449 | return; |
450 | |
451 | /* |
452 | * ieee80211_bss_get_ie() ensures we can access: |
453 | * - country_ie + 2, the start of the country ie data, and |
454 | * - and country_ie[1] which is the IE length |
455 | */ |
456 | regulatory_hint_11d(wdev->wiphy, |
457 | country_ie + 2, |
458 | country_ie[1]); |
459 | } |
460 | |
461 | void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, |
462 | const u8 *req_ie, size_t req_ie_len, |
463 | const u8 *resp_ie, size_t resp_ie_len, |
464 | u16 status, gfp_t gfp) |
465 | { |
466 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
467 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
468 | struct cfg80211_event *ev; |
469 | unsigned long flags; |
470 | |
471 | CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING); |
472 | |
473 | ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); |
474 | if (!ev) |
475 | return; |
476 | |
477 | ev->type = EVENT_CONNECT_RESULT; |
478 | if (bssid) |
479 | memcpy(ev->cr.bssid, bssid, ETH_ALEN); |
480 | ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); |
481 | ev->cr.req_ie_len = req_ie_len; |
482 | memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); |
483 | ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; |
484 | ev->cr.resp_ie_len = resp_ie_len; |
485 | memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); |
486 | ev->cr.status = status; |
487 | |
488 | spin_lock_irqsave(&wdev->event_lock, flags); |
489 | list_add_tail(&ev->list, &wdev->event_list); |
490 | spin_unlock_irqrestore(&wdev->event_lock, flags); |
491 | schedule_work(&rdev->event_work); |
492 | } |
493 | EXPORT_SYMBOL(cfg80211_connect_result); |
494 | |
495 | void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid, |
496 | const u8 *req_ie, size_t req_ie_len, |
497 | const u8 *resp_ie, size_t resp_ie_len) |
498 | { |
499 | struct cfg80211_bss *bss; |
500 | #ifdef CONFIG_WIRELESS_EXT |
501 | union iwreq_data wrqu; |
502 | #endif |
503 | |
504 | ASSERT_WDEV_LOCK(wdev); |
505 | |
506 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) |
507 | return; |
508 | |
509 | if (wdev->sme_state != CFG80211_SME_CONNECTED) |
510 | return; |
511 | |
512 | /* internal error -- how did we get to CONNECTED w/o BSS? */ |
513 | if (WARN_ON(!wdev->current_bss)) { |
514 | return; |
515 | } |
516 | |
517 | cfg80211_unhold_bss(wdev->current_bss); |
518 | cfg80211_put_bss(&wdev->current_bss->pub); |
519 | wdev->current_bss = NULL; |
520 | |
521 | bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, |
522 | wdev->ssid, wdev->ssid_len, |
523 | WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS); |
524 | |
525 | if (WARN_ON(!bss)) |
526 | return; |
527 | |
528 | cfg80211_hold_bss(bss_from_pub(bss)); |
529 | wdev->current_bss = bss_from_pub(bss); |
530 | |
531 | nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid, |
532 | req_ie, req_ie_len, resp_ie, resp_ie_len, |
533 | GFP_KERNEL); |
534 | |
535 | #ifdef CONFIG_WIRELESS_EXT |
536 | if (req_ie) { |
537 | memset(&wrqu, 0, sizeof(wrqu)); |
538 | wrqu.data.length = req_ie_len; |
539 | wireless_send_event(wdev->netdev, IWEVASSOCREQIE, |
540 | &wrqu, req_ie); |
541 | } |
542 | |
543 | if (resp_ie) { |
544 | memset(&wrqu, 0, sizeof(wrqu)); |
545 | wrqu.data.length = resp_ie_len; |
546 | wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, |
547 | &wrqu, resp_ie); |
548 | } |
549 | |
550 | memset(&wrqu, 0, sizeof(wrqu)); |
551 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
552 | memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); |
553 | memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); |
554 | wdev->wext.prev_bssid_valid = true; |
555 | wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); |
556 | #endif |
557 | } |
558 | |
559 | void cfg80211_roamed(struct net_device *dev, const u8 *bssid, |
560 | const u8 *req_ie, size_t req_ie_len, |
561 | const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) |
562 | { |
563 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
564 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
565 | struct cfg80211_event *ev; |
566 | unsigned long flags; |
567 | |
568 | CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); |
569 | |
570 | ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); |
571 | if (!ev) |
572 | return; |
573 | |
574 | ev->type = EVENT_ROAMED; |
575 | memcpy(ev->rm.bssid, bssid, ETH_ALEN); |
576 | ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); |
577 | ev->rm.req_ie_len = req_ie_len; |
578 | memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); |
579 | ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; |
580 | ev->rm.resp_ie_len = resp_ie_len; |
581 | memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); |
582 | |
583 | spin_lock_irqsave(&wdev->event_lock, flags); |
584 | list_add_tail(&ev->list, &wdev->event_list); |
585 | spin_unlock_irqrestore(&wdev->event_lock, flags); |
586 | schedule_work(&rdev->event_work); |
587 | } |
588 | EXPORT_SYMBOL(cfg80211_roamed); |
589 | |
590 | void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, |
591 | size_t ie_len, u16 reason, bool from_ap) |
592 | { |
593 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
594 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
595 | int i; |
596 | #ifdef CONFIG_WIRELESS_EXT |
597 | union iwreq_data wrqu; |
598 | #endif |
599 | |
600 | ASSERT_WDEV_LOCK(wdev); |
601 | |
602 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) |
603 | return; |
604 | |
605 | if (wdev->sme_state != CFG80211_SME_CONNECTED) |
606 | return; |
607 | |
608 | if (wdev->current_bss) { |
609 | cfg80211_unhold_bss(wdev->current_bss); |
610 | cfg80211_put_bss(&wdev->current_bss->pub); |
611 | } |
612 | |
613 | wdev->current_bss = NULL; |
614 | wdev->sme_state = CFG80211_SME_IDLE; |
615 | wdev->ssid_len = 0; |
616 | |
617 | if (wdev->conn) { |
618 | const u8 *bssid; |
619 | int ret; |
620 | |
621 | kfree(wdev->conn->ie); |
622 | wdev->conn->ie = NULL; |
623 | kfree(wdev->conn); |
624 | wdev->conn = NULL; |
625 | |
626 | /* |
627 | * If this disconnect was due to a disassoc, we |
628 | * we might still have an auth BSS around. For |
629 | * the userspace SME that's currently expected, |
630 | * but for the kernel SME (nl80211 CONNECT or |
631 | * wireless extensions) we want to clear up all |
632 | * state. |
633 | */ |
634 | for (i = 0; i < MAX_AUTH_BSSES; i++) { |
635 | if (!wdev->auth_bsses[i]) |
636 | continue; |
637 | bssid = wdev->auth_bsses[i]->pub.bssid; |
638 | ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, |
639 | WLAN_REASON_DEAUTH_LEAVING); |
640 | WARN(ret, "deauth failed: %d\n", ret); |
641 | } |
642 | } |
643 | |
644 | nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); |
645 | |
646 | /* |
647 | * Delete all the keys ... pairwise keys can't really |
648 | * exist any more anyway, but default keys might. |
649 | */ |
650 | if (rdev->ops->del_key) |
651 | for (i = 0; i < 6; i++) |
652 | rdev->ops->del_key(wdev->wiphy, dev, i, NULL); |
653 | |
654 | #ifdef CONFIG_WIRELESS_EXT |
655 | memset(&wrqu, 0, sizeof(wrqu)); |
656 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
657 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); |
658 | wdev->wext.connect.ssid_len = 0; |
659 | #endif |
660 | } |
661 | |
662 | void cfg80211_disconnected(struct net_device *dev, u16 reason, |
663 | u8 *ie, size_t ie_len, gfp_t gfp) |
664 | { |
665 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
666 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
667 | struct cfg80211_event *ev; |
668 | unsigned long flags; |
669 | |
670 | CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); |
671 | |
672 | ev = kzalloc(sizeof(*ev) + ie_len, gfp); |
673 | if (!ev) |
674 | return; |
675 | |
676 | ev->type = EVENT_DISCONNECTED; |
677 | ev->dc.ie = ((u8 *)ev) + sizeof(*ev); |
678 | ev->dc.ie_len = ie_len; |
679 | memcpy((void *)ev->dc.ie, ie, ie_len); |
680 | ev->dc.reason = reason; |
681 | |
682 | spin_lock_irqsave(&wdev->event_lock, flags); |
683 | list_add_tail(&ev->list, &wdev->event_list); |
684 | spin_unlock_irqrestore(&wdev->event_lock, flags); |
685 | schedule_work(&rdev->event_work); |
686 | } |
687 | EXPORT_SYMBOL(cfg80211_disconnected); |
688 | |
689 | int __cfg80211_connect(struct cfg80211_registered_device *rdev, |
690 | struct net_device *dev, |
691 | struct cfg80211_connect_params *connect, |
692 | struct cfg80211_cached_keys *connkeys, |
693 | const u8 *prev_bssid) |
694 | { |
695 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
696 | struct ieee80211_channel *chan; |
697 | struct cfg80211_bss *bss = NULL; |
698 | int err; |
699 | |
700 | ASSERT_WDEV_LOCK(wdev); |
701 | |
702 | if (wdev->sme_state != CFG80211_SME_IDLE) |
703 | return -EALREADY; |
704 | |
705 | chan = rdev_fixed_channel(rdev, wdev); |
706 | if (chan && chan != connect->channel) |
707 | return -EBUSY; |
708 | |
709 | if (WARN_ON(wdev->connect_keys)) { |
710 | kfree(wdev->connect_keys); |
711 | wdev->connect_keys = NULL; |
712 | } |
713 | |
714 | if (connkeys && connkeys->def >= 0) { |
715 | int idx; |
716 | u32 cipher; |
717 | |
718 | idx = connkeys->def; |
719 | cipher = connkeys->params[idx].cipher; |
720 | /* If given a WEP key we may need it for shared key auth */ |
721 | if (cipher == WLAN_CIPHER_SUITE_WEP40 || |
722 | cipher == WLAN_CIPHER_SUITE_WEP104) { |
723 | connect->key_idx = idx; |
724 | connect->key = connkeys->params[idx].key; |
725 | connect->key_len = connkeys->params[idx].key_len; |
726 | |
727 | /* |
728 | * If ciphers are not set (e.g. when going through |
729 | * iwconfig), we have to set them appropriately here. |
730 | */ |
731 | if (connect->crypto.cipher_group == 0) |
732 | connect->crypto.cipher_group = cipher; |
733 | |
734 | if (connect->crypto.n_ciphers_pairwise == 0) { |
735 | connect->crypto.n_ciphers_pairwise = 1; |
736 | connect->crypto.ciphers_pairwise[0] = cipher; |
737 | } |
738 | } |
739 | } |
740 | |
741 | if (!rdev->ops->connect) { |
742 | if (!rdev->ops->auth || !rdev->ops->assoc) |
743 | return -EOPNOTSUPP; |
744 | |
745 | if (WARN_ON(wdev->conn)) |
746 | return -EINPROGRESS; |
747 | |
748 | wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); |
749 | if (!wdev->conn) |
750 | return -ENOMEM; |
751 | |
752 | /* |
753 | * Copy all parameters, and treat explicitly IEs, BSSID, SSID. |
754 | */ |
755 | memcpy(&wdev->conn->params, connect, sizeof(*connect)); |
756 | if (connect->bssid) { |
757 | wdev->conn->params.bssid = wdev->conn->bssid; |
758 | memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); |
759 | } |
760 | |
761 | if (connect->ie) { |
762 | wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, |
763 | GFP_KERNEL); |
764 | wdev->conn->params.ie = wdev->conn->ie; |
765 | if (!wdev->conn->ie) { |
766 | kfree(wdev->conn); |
767 | wdev->conn = NULL; |
768 | return -ENOMEM; |
769 | } |
770 | } |
771 | |
772 | if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { |
773 | wdev->conn->auto_auth = true; |
774 | /* start with open system ... should mostly work */ |
775 | wdev->conn->params.auth_type = |
776 | NL80211_AUTHTYPE_OPEN_SYSTEM; |
777 | } else { |
778 | wdev->conn->auto_auth = false; |
779 | } |
780 | |
781 | memcpy(wdev->ssid, connect->ssid, connect->ssid_len); |
782 | wdev->ssid_len = connect->ssid_len; |
783 | wdev->conn->params.ssid = wdev->ssid; |
784 | wdev->conn->params.ssid_len = connect->ssid_len; |
785 | |
786 | /* see if we have the bss already */ |
787 | bss = cfg80211_get_conn_bss(wdev); |
788 | |
789 | wdev->sme_state = CFG80211_SME_CONNECTING; |
790 | wdev->connect_keys = connkeys; |
791 | |
792 | if (prev_bssid) { |
793 | memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); |
794 | wdev->conn->prev_bssid_valid = true; |
795 | } |
796 | |
797 | /* we're good if we have a matching bss struct */ |
798 | if (bss) { |
799 | wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; |
800 | err = cfg80211_conn_do_work(wdev); |
801 | cfg80211_put_bss(bss); |
802 | } else { |
803 | /* otherwise we'll need to scan for the AP first */ |
804 | err = cfg80211_conn_scan(wdev); |
805 | /* |
806 | * If we can't scan right now, then we need to scan again |
807 | * after the current scan finished, since the parameters |
808 | * changed (unless we find a good AP anyway). |
809 | */ |
810 | if (err == -EBUSY) { |
811 | err = 0; |
812 | wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; |
813 | } |
814 | } |
815 | if (err) { |
816 | kfree(wdev->conn->ie); |
817 | kfree(wdev->conn); |
818 | wdev->conn = NULL; |
819 | wdev->sme_state = CFG80211_SME_IDLE; |
820 | wdev->connect_keys = NULL; |
821 | wdev->ssid_len = 0; |
822 | } |
823 | |
824 | return err; |
825 | } else { |
826 | wdev->sme_state = CFG80211_SME_CONNECTING; |
827 | wdev->connect_keys = connkeys; |
828 | err = rdev->ops->connect(&rdev->wiphy, dev, connect); |
829 | if (err) { |
830 | wdev->connect_keys = NULL; |
831 | wdev->sme_state = CFG80211_SME_IDLE; |
832 | return err; |
833 | } |
834 | |
835 | memcpy(wdev->ssid, connect->ssid, connect->ssid_len); |
836 | wdev->ssid_len = connect->ssid_len; |
837 | |
838 | return 0; |
839 | } |
840 | } |
841 | |
842 | int cfg80211_connect(struct cfg80211_registered_device *rdev, |
843 | struct net_device *dev, |
844 | struct cfg80211_connect_params *connect, |
845 | struct cfg80211_cached_keys *connkeys) |
846 | { |
847 | int err; |
848 | |
849 | mutex_lock(&rdev->devlist_mtx); |
850 | wdev_lock(dev->ieee80211_ptr); |
851 | err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL); |
852 | wdev_unlock(dev->ieee80211_ptr); |
853 | mutex_unlock(&rdev->devlist_mtx); |
854 | |
855 | return err; |
856 | } |
857 | |
858 | int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, |
859 | struct net_device *dev, u16 reason, bool wextev) |
860 | { |
861 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
862 | int err; |
863 | |
864 | ASSERT_WDEV_LOCK(wdev); |
865 | |
866 | if (wdev->sme_state == CFG80211_SME_IDLE) |
867 | return -EINVAL; |
868 | |
869 | kfree(wdev->connect_keys); |
870 | wdev->connect_keys = NULL; |
871 | |
872 | if (!rdev->ops->disconnect) { |
873 | if (!rdev->ops->deauth) |
874 | return -EOPNOTSUPP; |
875 | |
876 | /* was it connected by userspace SME? */ |
877 | if (!wdev->conn) { |
878 | cfg80211_mlme_down(rdev, dev); |
879 | return 0; |
880 | } |
881 | |
882 | if (wdev->sme_state == CFG80211_SME_CONNECTING && |
883 | (wdev->conn->state == CFG80211_CONN_SCANNING || |
884 | wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) { |
885 | wdev->sme_state = CFG80211_SME_IDLE; |
886 | kfree(wdev->conn->ie); |
887 | kfree(wdev->conn); |
888 | wdev->conn = NULL; |
889 | wdev->ssid_len = 0; |
890 | return 0; |
891 | } |
892 | |
893 | /* wdev->conn->params.bssid must be set if > SCANNING */ |
894 | err = __cfg80211_mlme_deauth(rdev, dev, |
895 | wdev->conn->params.bssid, |
896 | NULL, 0, reason); |
897 | if (err) |
898 | return err; |
899 | } else { |
900 | err = rdev->ops->disconnect(&rdev->wiphy, dev, reason); |
901 | if (err) |
902 | return err; |
903 | } |
904 | |
905 | if (wdev->sme_state == CFG80211_SME_CONNECTED) |
906 | __cfg80211_disconnected(dev, NULL, 0, 0, false); |
907 | else if (wdev->sme_state == CFG80211_SME_CONNECTING) |
908 | __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0, |
909 | WLAN_STATUS_UNSPECIFIED_FAILURE, |
910 | wextev, NULL); |
911 | |
912 | return 0; |
913 | } |
914 | |
915 | int cfg80211_disconnect(struct cfg80211_registered_device *rdev, |
916 | struct net_device *dev, |
917 | u16 reason, bool wextev) |
918 | { |
919 | int err; |
920 | |
921 | wdev_lock(dev->ieee80211_ptr); |
922 | err = __cfg80211_disconnect(rdev, dev, reason, wextev); |
923 | wdev_unlock(dev->ieee80211_ptr); |
924 | |
925 | return err; |
926 | } |
927 | |
928 | void cfg80211_sme_disassoc(struct net_device *dev, int idx) |
929 | { |
930 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
931 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
932 | u8 bssid[ETH_ALEN]; |
933 | |
934 | ASSERT_WDEV_LOCK(wdev); |
935 | |
936 | if (!wdev->conn) |
937 | return; |
938 | |
939 | if (wdev->conn->state == CFG80211_CONN_IDLE) |
940 | return; |
941 | |
942 | /* |
943 | * Ok, so the association was made by this SME -- we don't |
944 | * want it any more so deauthenticate too. |
945 | */ |
946 | |
947 | if (!wdev->auth_bsses[idx]) |
948 | return; |
949 | |
950 | memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN); |
951 | if (__cfg80211_mlme_deauth(rdev, dev, bssid, |
952 | NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) { |
953 | /* whatever -- assume gone anyway */ |
954 | cfg80211_unhold_bss(wdev->auth_bsses[idx]); |
955 | cfg80211_put_bss(&wdev->auth_bsses[idx]->pub); |
956 | wdev->auth_bsses[idx] = NULL; |
957 | } |
958 | } |
959 |
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