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