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1/*
2 * SME code for cfg80211
3 * both driver SME event handling and the SME implementation
4 * (for nl80211's connect() and wext)
5 *
6 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (C) 2009 Intel Corporation. All rights reserved.
8 */
9
10#include <linux/etherdevice.h>
11#include <linux/if_arp.h>
12#include <linux/slab.h>
13#include <linux/workqueue.h>
14#include <linux/wireless.h>
15#include <linux/export.h>
16#include <net/iw_handler.h>
17#include <net/cfg80211.h>
18#include <net/rtnetlink.h>
19#include "nl80211.h"
20#include "reg.h"
21#include "rdev-ops.h"
22
23/*
24 * Software SME in cfg80211, using auth/assoc/deauth calls to the
25 * driver. This is is for implementing nl80211's connect/disconnect
26 * and wireless extensions (if configured.)
27 */
28
29struct cfg80211_conn {
30 struct cfg80211_connect_params params;
31 /* these are sub-states of the _CONNECTING sme_state */
32 enum {
33 CFG80211_CONN_SCANNING,
34 CFG80211_CONN_SCAN_AGAIN,
35 CFG80211_CONN_AUTHENTICATE_NEXT,
36 CFG80211_CONN_AUTHENTICATING,
37 CFG80211_CONN_AUTH_FAILED,
38 CFG80211_CONN_ASSOCIATE_NEXT,
39 CFG80211_CONN_ASSOCIATING,
40 CFG80211_CONN_ASSOC_FAILED,
41 CFG80211_CONN_DEAUTH,
42 CFG80211_CONN_ABANDON,
43 CFG80211_CONN_CONNECTED,
44 } state;
45 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
46 const u8 *ie;
47 size_t ie_len;
48 bool auto_auth, prev_bssid_valid;
49};
50
51static void cfg80211_sme_free(struct wireless_dev *wdev)
52{
53 if (!wdev->conn)
54 return;
55
56 kfree(wdev->conn->ie);
57 kfree(wdev->conn);
58 wdev->conn = NULL;
59}
60
61static int cfg80211_conn_scan(struct wireless_dev *wdev)
62{
63 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
64 struct cfg80211_scan_request *request;
65 int n_channels, err;
66
67 ASSERT_RTNL();
68 ASSERT_WDEV_LOCK(wdev);
69
70 if (rdev->scan_req || rdev->scan_msg)
71 return -EBUSY;
72
73 if (wdev->conn->params.channel)
74 n_channels = 1;
75 else
76 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
77
78 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
79 sizeof(request->channels[0]) * n_channels,
80 GFP_KERNEL);
81 if (!request)
82 return -ENOMEM;
83
84 if (wdev->conn->params.channel) {
85 enum nl80211_band band = wdev->conn->params.channel->band;
86 struct ieee80211_supported_band *sband =
87 wdev->wiphy->bands[band];
88
89 if (!sband) {
90 kfree(request);
91 return -EINVAL;
92 }
93 request->channels[0] = wdev->conn->params.channel;
94 request->rates[band] = (1 << sband->n_bitrates) - 1;
95 } else {
96 int i = 0, j;
97 enum nl80211_band band;
98 struct ieee80211_supported_band *bands;
99 struct ieee80211_channel *channel;
100
101 for (band = 0; band < NUM_NL80211_BANDS; band++) {
102 bands = wdev->wiphy->bands[band];
103 if (!bands)
104 continue;
105 for (j = 0; j < bands->n_channels; j++) {
106 channel = &bands->channels[j];
107 if (channel->flags & IEEE80211_CHAN_DISABLED)
108 continue;
109 request->channels[i++] = channel;
110 }
111 request->rates[band] = (1 << bands->n_bitrates) - 1;
112 }
113 n_channels = i;
114 }
115 request->n_channels = n_channels;
116 request->ssids = (void *)&request->channels[n_channels];
117 request->n_ssids = 1;
118
119 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
120 wdev->conn->params.ssid_len);
121 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
122
123 eth_broadcast_addr(request->bssid);
124
125 request->wdev = wdev;
126 request->wiphy = &rdev->wiphy;
127 request->scan_start = jiffies;
128
129 rdev->scan_req = request;
130
131 err = rdev_scan(rdev, request);
132 if (!err) {
133 wdev->conn->state = CFG80211_CONN_SCANNING;
134 nl80211_send_scan_start(rdev, wdev);
135 dev_hold(wdev->netdev);
136 } else {
137 rdev->scan_req = NULL;
138 kfree(request);
139 }
140 return err;
141}
142
143static int cfg80211_conn_do_work(struct wireless_dev *wdev)
144{
145 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
146 struct cfg80211_connect_params *params;
147 struct cfg80211_assoc_request req = {};
148 int err;
149
150 ASSERT_WDEV_LOCK(wdev);
151
152 if (!wdev->conn)
153 return 0;
154
155 params = &wdev->conn->params;
156
157 switch (wdev->conn->state) {
158 case CFG80211_CONN_SCANNING:
159 /* didn't find it during scan ... */
160 return -ENOENT;
161 case CFG80211_CONN_SCAN_AGAIN:
162 return cfg80211_conn_scan(wdev);
163 case CFG80211_CONN_AUTHENTICATE_NEXT:
164 if (WARN_ON(!rdev->ops->auth))
165 return -EOPNOTSUPP;
166 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
167 return cfg80211_mlme_auth(rdev, wdev->netdev,
168 params->channel, params->auth_type,
169 params->bssid,
170 params->ssid, params->ssid_len,
171 NULL, 0,
172 params->key, params->key_len,
173 params->key_idx, NULL, 0);
174 case CFG80211_CONN_AUTH_FAILED:
175 return -ENOTCONN;
176 case CFG80211_CONN_ASSOCIATE_NEXT:
177 if (WARN_ON(!rdev->ops->assoc))
178 return -EOPNOTSUPP;
179 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
180 if (wdev->conn->prev_bssid_valid)
181 req.prev_bssid = wdev->conn->prev_bssid;
182 req.ie = params->ie;
183 req.ie_len = params->ie_len;
184 req.use_mfp = params->mfp != NL80211_MFP_NO;
185 req.crypto = params->crypto;
186 req.flags = params->flags;
187 req.ht_capa = params->ht_capa;
188 req.ht_capa_mask = params->ht_capa_mask;
189 req.vht_capa = params->vht_capa;
190 req.vht_capa_mask = params->vht_capa_mask;
191
192 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
193 params->bssid, params->ssid,
194 params->ssid_len, &req);
195 if (err)
196 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
197 NULL, 0,
198 WLAN_REASON_DEAUTH_LEAVING,
199 false);
200 return err;
201 case CFG80211_CONN_ASSOC_FAILED:
202 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
203 NULL, 0,
204 WLAN_REASON_DEAUTH_LEAVING, false);
205 return -ENOTCONN;
206 case CFG80211_CONN_DEAUTH:
207 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
208 NULL, 0,
209 WLAN_REASON_DEAUTH_LEAVING, false);
210 /* fall through */
211 case CFG80211_CONN_ABANDON:
212 /* free directly, disconnected event already sent */
213 cfg80211_sme_free(wdev);
214 return 0;
215 default:
216 return 0;
217 }
218}
219
220void cfg80211_conn_work(struct work_struct *work)
221{
222 struct cfg80211_registered_device *rdev =
223 container_of(work, struct cfg80211_registered_device, conn_work);
224 struct wireless_dev *wdev;
225 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
226
227 rtnl_lock();
228
229 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
230 if (!wdev->netdev)
231 continue;
232
233 wdev_lock(wdev);
234 if (!netif_running(wdev->netdev)) {
235 wdev_unlock(wdev);
236 continue;
237 }
238 if (!wdev->conn ||
239 wdev->conn->state == CFG80211_CONN_CONNECTED) {
240 wdev_unlock(wdev);
241 continue;
242 }
243 if (wdev->conn->params.bssid) {
244 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
245 bssid = bssid_buf;
246 }
247 if (cfg80211_conn_do_work(wdev)) {
248 __cfg80211_connect_result(
249 wdev->netdev, bssid,
250 NULL, 0, NULL, 0, -1, false, NULL);
251 }
252 wdev_unlock(wdev);
253 }
254
255 rtnl_unlock();
256}
257
258/* Returned bss is reference counted and must be cleaned up appropriately. */
259static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
260{
261 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
262 struct cfg80211_bss *bss;
263
264 ASSERT_WDEV_LOCK(wdev);
265
266 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
267 wdev->conn->params.bssid,
268 wdev->conn->params.ssid,
269 wdev->conn->params.ssid_len,
270 wdev->conn_bss_type,
271 IEEE80211_PRIVACY(wdev->conn->params.privacy));
272 if (!bss)
273 return NULL;
274
275 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
276 wdev->conn->params.bssid = wdev->conn->bssid;
277 wdev->conn->params.channel = bss->channel;
278 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
279 schedule_work(&rdev->conn_work);
280
281 return bss;
282}
283
284static void __cfg80211_sme_scan_done(struct net_device *dev)
285{
286 struct wireless_dev *wdev = dev->ieee80211_ptr;
287 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
288 struct cfg80211_bss *bss;
289
290 ASSERT_WDEV_LOCK(wdev);
291
292 if (!wdev->conn)
293 return;
294
295 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
296 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
297 return;
298
299 bss = cfg80211_get_conn_bss(wdev);
300 if (bss)
301 cfg80211_put_bss(&rdev->wiphy, bss);
302 else
303 schedule_work(&rdev->conn_work);
304}
305
306void cfg80211_sme_scan_done(struct net_device *dev)
307{
308 struct wireless_dev *wdev = dev->ieee80211_ptr;
309
310 wdev_lock(wdev);
311 __cfg80211_sme_scan_done(dev);
312 wdev_unlock(wdev);
313}
314
315void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
316{
317 struct wiphy *wiphy = wdev->wiphy;
318 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
319 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
320 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
321
322 ASSERT_WDEV_LOCK(wdev);
323
324 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
325 return;
326
327 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
328 wdev->conn->auto_auth &&
329 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
330 /* select automatically between only open, shared, leap */
331 switch (wdev->conn->params.auth_type) {
332 case NL80211_AUTHTYPE_OPEN_SYSTEM:
333 if (wdev->connect_keys)
334 wdev->conn->params.auth_type =
335 NL80211_AUTHTYPE_SHARED_KEY;
336 else
337 wdev->conn->params.auth_type =
338 NL80211_AUTHTYPE_NETWORK_EAP;
339 break;
340 case NL80211_AUTHTYPE_SHARED_KEY:
341 wdev->conn->params.auth_type =
342 NL80211_AUTHTYPE_NETWORK_EAP;
343 break;
344 default:
345 /* huh? */
346 wdev->conn->params.auth_type =
347 NL80211_AUTHTYPE_OPEN_SYSTEM;
348 break;
349 }
350 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
351 schedule_work(&rdev->conn_work);
352 } else if (status_code != WLAN_STATUS_SUCCESS) {
353 __cfg80211_connect_result(wdev->netdev, mgmt->bssid,
354 NULL, 0, NULL, 0,
355 status_code, false, NULL);
356 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
357 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
358 schedule_work(&rdev->conn_work);
359 }
360}
361
362bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
363{
364 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
365
366 if (!wdev->conn)
367 return false;
368
369 if (status == WLAN_STATUS_SUCCESS) {
370 wdev->conn->state = CFG80211_CONN_CONNECTED;
371 return false;
372 }
373
374 if (wdev->conn->prev_bssid_valid) {
375 /*
376 * Some stupid APs don't accept reassoc, so we
377 * need to fall back to trying regular assoc;
378 * return true so no event is sent to userspace.
379 */
380 wdev->conn->prev_bssid_valid = false;
381 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
382 schedule_work(&rdev->conn_work);
383 return true;
384 }
385
386 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
387 schedule_work(&rdev->conn_work);
388 return false;
389}
390
391void cfg80211_sme_deauth(struct wireless_dev *wdev)
392{
393 cfg80211_sme_free(wdev);
394}
395
396void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
397{
398 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
399
400 if (!wdev->conn)
401 return;
402
403 wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
404 schedule_work(&rdev->conn_work);
405}
406
407void cfg80211_sme_disassoc(struct wireless_dev *wdev)
408{
409 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
410
411 if (!wdev->conn)
412 return;
413
414 wdev->conn->state = CFG80211_CONN_DEAUTH;
415 schedule_work(&rdev->conn_work);
416}
417
418void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
419{
420 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
421
422 if (!wdev->conn)
423 return;
424
425 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
426 schedule_work(&rdev->conn_work);
427}
428
429void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
430{
431 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
432
433 if (!wdev->conn)
434 return;
435
436 wdev->conn->state = CFG80211_CONN_ABANDON;
437 schedule_work(&rdev->conn_work);
438}
439
440static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
441 const u8 *ies, size_t ies_len,
442 const u8 **out_ies, size_t *out_ies_len)
443{
444 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
445 u8 *buf;
446 size_t offs;
447
448 if (!rdev->wiphy.extended_capabilities_len ||
449 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
450 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
451 if (!*out_ies)
452 return -ENOMEM;
453 *out_ies_len = ies_len;
454 return 0;
455 }
456
457 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
458 GFP_KERNEL);
459 if (!buf)
460 return -ENOMEM;
461
462 if (ies_len) {
463 static const u8 before_extcapa[] = {
464 /* not listing IEs expected to be created by driver */
465 WLAN_EID_RSN,
466 WLAN_EID_QOS_CAPA,
467 WLAN_EID_RRM_ENABLED_CAPABILITIES,
468 WLAN_EID_MOBILITY_DOMAIN,
469 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
470 WLAN_EID_BSS_COEX_2040,
471 };
472
473 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
474 ARRAY_SIZE(before_extcapa), 0);
475 memcpy(buf, ies, offs);
476 /* leave a whole for extended capabilities IE */
477 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
478 ies + offs, ies_len - offs);
479 } else {
480 offs = 0;
481 }
482
483 /* place extended capabilities IE (with only driver capabilities) */
484 buf[offs] = WLAN_EID_EXT_CAPABILITY;
485 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
486 memcpy(buf + offs + 2,
487 rdev->wiphy.extended_capabilities,
488 rdev->wiphy.extended_capabilities_len);
489
490 *out_ies = buf;
491 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
492
493 return 0;
494}
495
496static int cfg80211_sme_connect(struct wireless_dev *wdev,
497 struct cfg80211_connect_params *connect,
498 const u8 *prev_bssid)
499{
500 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
501 struct cfg80211_bss *bss;
502 int err;
503
504 if (!rdev->ops->auth || !rdev->ops->assoc)
505 return -EOPNOTSUPP;
506
507 if (wdev->current_bss) {
508 if (!prev_bssid)
509 return -EALREADY;
510 if (prev_bssid &&
511 !ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
512 return -ENOTCONN;
513 cfg80211_unhold_bss(wdev->current_bss);
514 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
515 wdev->current_bss = NULL;
516
517 cfg80211_sme_free(wdev);
518 }
519
520 if (WARN_ON(wdev->conn))
521 return -EINPROGRESS;
522
523 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
524 if (!wdev->conn)
525 return -ENOMEM;
526
527 /*
528 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
529 */
530 memcpy(&wdev->conn->params, connect, sizeof(*connect));
531 if (connect->bssid) {
532 wdev->conn->params.bssid = wdev->conn->bssid;
533 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
534 }
535
536 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
537 &wdev->conn->ie,
538 &wdev->conn->params.ie_len)) {
539 kfree(wdev->conn);
540 wdev->conn = NULL;
541 return -ENOMEM;
542 }
543 wdev->conn->params.ie = wdev->conn->ie;
544
545 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
546 wdev->conn->auto_auth = true;
547 /* start with open system ... should mostly work */
548 wdev->conn->params.auth_type =
549 NL80211_AUTHTYPE_OPEN_SYSTEM;
550 } else {
551 wdev->conn->auto_auth = false;
552 }
553
554 wdev->conn->params.ssid = wdev->ssid;
555 wdev->conn->params.ssid_len = wdev->ssid_len;
556
557 /* see if we have the bss already */
558 bss = cfg80211_get_conn_bss(wdev);
559
560 if (prev_bssid) {
561 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
562 wdev->conn->prev_bssid_valid = true;
563 }
564
565 /* we're good if we have a matching bss struct */
566 if (bss) {
567 err = cfg80211_conn_do_work(wdev);
568 cfg80211_put_bss(wdev->wiphy, bss);
569 } else {
570 /* otherwise we'll need to scan for the AP first */
571 err = cfg80211_conn_scan(wdev);
572
573 /*
574 * If we can't scan right now, then we need to scan again
575 * after the current scan finished, since the parameters
576 * changed (unless we find a good AP anyway).
577 */
578 if (err == -EBUSY) {
579 err = 0;
580 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
581 }
582 }
583
584 if (err)
585 cfg80211_sme_free(wdev);
586
587 return err;
588}
589
590static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
591{
592 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
593 int err;
594
595 if (!wdev->conn)
596 return 0;
597
598 if (!rdev->ops->deauth)
599 return -EOPNOTSUPP;
600
601 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
602 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
603 err = 0;
604 goto out;
605 }
606
607 /* wdev->conn->params.bssid must be set if > SCANNING */
608 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
609 wdev->conn->params.bssid,
610 NULL, 0, reason, false);
611 out:
612 cfg80211_sme_free(wdev);
613 return err;
614}
615
616/*
617 * code shared for in-device and software SME
618 */
619
620static bool cfg80211_is_all_idle(void)
621{
622 struct cfg80211_registered_device *rdev;
623 struct wireless_dev *wdev;
624 bool is_all_idle = true;
625
626 /*
627 * All devices must be idle as otherwise if you are actively
628 * scanning some new beacon hints could be learned and would
629 * count as new regulatory hints.
630 */
631 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
632 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
633 wdev_lock(wdev);
634 if (wdev->conn || wdev->current_bss)
635 is_all_idle = false;
636 wdev_unlock(wdev);
637 }
638 }
639
640 return is_all_idle;
641}
642
643static void disconnect_work(struct work_struct *work)
644{
645 rtnl_lock();
646 if (cfg80211_is_all_idle())
647 regulatory_hint_disconnect();
648 rtnl_unlock();
649}
650
651static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
652
653
654/*
655 * API calls for drivers implementing connect/disconnect and
656 * SME event handling
657 */
658
659/* This method must consume bss one way or another */
660void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
661 const u8 *req_ie, size_t req_ie_len,
662 const u8 *resp_ie, size_t resp_ie_len,
663 int status, bool wextev,
664 struct cfg80211_bss *bss)
665{
666 struct wireless_dev *wdev = dev->ieee80211_ptr;
667 const u8 *country_ie;
668#ifdef CONFIG_CFG80211_WEXT
669 union iwreq_data wrqu;
670#endif
671
672 ASSERT_WDEV_LOCK(wdev);
673
674 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
675 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
676 cfg80211_put_bss(wdev->wiphy, bss);
677 return;
678 }
679
680 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev,
681 bssid, req_ie, req_ie_len,
682 resp_ie, resp_ie_len,
683 status, GFP_KERNEL);
684
685#ifdef CONFIG_CFG80211_WEXT
686 if (wextev) {
687 if (req_ie && status == WLAN_STATUS_SUCCESS) {
688 memset(&wrqu, 0, sizeof(wrqu));
689 wrqu.data.length = req_ie_len;
690 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
691 }
692
693 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
694 memset(&wrqu, 0, sizeof(wrqu));
695 wrqu.data.length = resp_ie_len;
696 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
697 }
698
699 memset(&wrqu, 0, sizeof(wrqu));
700 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
701 if (bssid && status == WLAN_STATUS_SUCCESS) {
702 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
703 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
704 wdev->wext.prev_bssid_valid = true;
705 }
706 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
707 }
708#endif
709
710 if (!bss && (status == WLAN_STATUS_SUCCESS)) {
711 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
712 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
713 wdev->ssid, wdev->ssid_len,
714 wdev->conn_bss_type,
715 IEEE80211_PRIVACY_ANY);
716 if (bss)
717 cfg80211_hold_bss(bss_from_pub(bss));
718 }
719
720 if (wdev->current_bss) {
721 cfg80211_unhold_bss(wdev->current_bss);
722 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
723 wdev->current_bss = NULL;
724 }
725
726 if (status != WLAN_STATUS_SUCCESS) {
727 kzfree(wdev->connect_keys);
728 wdev->connect_keys = NULL;
729 wdev->ssid_len = 0;
730 if (bss) {
731 cfg80211_unhold_bss(bss_from_pub(bss));
732 cfg80211_put_bss(wdev->wiphy, bss);
733 }
734 cfg80211_sme_free(wdev);
735 return;
736 }
737
738 if (WARN_ON(!bss))
739 return;
740
741 wdev->current_bss = bss_from_pub(bss);
742
743 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
744 cfg80211_upload_connect_keys(wdev);
745
746 rcu_read_lock();
747 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
748 if (!country_ie) {
749 rcu_read_unlock();
750 return;
751 }
752
753 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
754 rcu_read_unlock();
755
756 if (!country_ie)
757 return;
758
759 /*
760 * ieee80211_bss_get_ie() ensures we can access:
761 * - country_ie + 2, the start of the country ie data, and
762 * - and country_ie[1] which is the IE length
763 */
764 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
765 country_ie + 2, country_ie[1]);
766 kfree(country_ie);
767}
768
769/* Consumes bss object one way or another */
770void cfg80211_connect_bss(struct net_device *dev, const u8 *bssid,
771 struct cfg80211_bss *bss, const u8 *req_ie,
772 size_t req_ie_len, const u8 *resp_ie,
773 size_t resp_ie_len, int status, gfp_t gfp)
774{
775 struct wireless_dev *wdev = dev->ieee80211_ptr;
776 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
777 struct cfg80211_event *ev;
778 unsigned long flags;
779
780 if (bss) {
781 /* Make sure the bss entry provided by the driver is valid. */
782 struct cfg80211_internal_bss *ibss = bss_from_pub(bss);
783
784 if (WARN_ON(list_empty(&ibss->list))) {
785 cfg80211_put_bss(wdev->wiphy, bss);
786 return;
787 }
788 }
789
790 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
791 if (!ev) {
792 cfg80211_put_bss(wdev->wiphy, bss);
793 return;
794 }
795
796 ev->type = EVENT_CONNECT_RESULT;
797 if (bssid)
798 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
799 if (req_ie_len) {
800 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
801 ev->cr.req_ie_len = req_ie_len;
802 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
803 }
804 if (resp_ie_len) {
805 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
806 ev->cr.resp_ie_len = resp_ie_len;
807 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
808 }
809 if (bss)
810 cfg80211_hold_bss(bss_from_pub(bss));
811 ev->cr.bss = bss;
812 ev->cr.status = status;
813
814 spin_lock_irqsave(&wdev->event_lock, flags);
815 list_add_tail(&ev->list, &wdev->event_list);
816 spin_unlock_irqrestore(&wdev->event_lock, flags);
817 queue_work(cfg80211_wq, &rdev->event_work);
818}
819EXPORT_SYMBOL(cfg80211_connect_bss);
820
821/* Consumes bss object one way or another */
822void __cfg80211_roamed(struct wireless_dev *wdev,
823 struct cfg80211_bss *bss,
824 const u8 *req_ie, size_t req_ie_len,
825 const u8 *resp_ie, size_t resp_ie_len)
826{
827#ifdef CONFIG_CFG80211_WEXT
828 union iwreq_data wrqu;
829#endif
830 ASSERT_WDEV_LOCK(wdev);
831
832 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
833 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
834 goto out;
835
836 if (WARN_ON(!wdev->current_bss))
837 goto out;
838
839 cfg80211_unhold_bss(wdev->current_bss);
840 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
841 wdev->current_bss = NULL;
842
843 cfg80211_hold_bss(bss_from_pub(bss));
844 wdev->current_bss = bss_from_pub(bss);
845
846 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
847 wdev->netdev, bss->bssid,
848 req_ie, req_ie_len, resp_ie, resp_ie_len,
849 GFP_KERNEL);
850
851#ifdef CONFIG_CFG80211_WEXT
852 if (req_ie) {
853 memset(&wrqu, 0, sizeof(wrqu));
854 wrqu.data.length = req_ie_len;
855 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
856 &wrqu, req_ie);
857 }
858
859 if (resp_ie) {
860 memset(&wrqu, 0, sizeof(wrqu));
861 wrqu.data.length = resp_ie_len;
862 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
863 &wrqu, resp_ie);
864 }
865
866 memset(&wrqu, 0, sizeof(wrqu));
867 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
868 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
869 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
870 wdev->wext.prev_bssid_valid = true;
871 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
872#endif
873
874 return;
875out:
876 cfg80211_put_bss(wdev->wiphy, bss);
877}
878
879void cfg80211_roamed(struct net_device *dev,
880 struct ieee80211_channel *channel,
881 const u8 *bssid,
882 const u8 *req_ie, size_t req_ie_len,
883 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
884{
885 struct wireless_dev *wdev = dev->ieee80211_ptr;
886 struct cfg80211_bss *bss;
887
888 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
889 wdev->ssid_len,
890 wdev->conn_bss_type, IEEE80211_PRIVACY_ANY);
891 if (WARN_ON(!bss))
892 return;
893
894 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
895 resp_ie_len, gfp);
896}
897EXPORT_SYMBOL(cfg80211_roamed);
898
899/* Consumes bss object one way or another */
900void cfg80211_roamed_bss(struct net_device *dev,
901 struct cfg80211_bss *bss, const u8 *req_ie,
902 size_t req_ie_len, const u8 *resp_ie,
903 size_t resp_ie_len, gfp_t gfp)
904{
905 struct wireless_dev *wdev = dev->ieee80211_ptr;
906 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
907 struct cfg80211_event *ev;
908 unsigned long flags;
909
910 if (WARN_ON(!bss))
911 return;
912
913 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
914 if (!ev) {
915 cfg80211_put_bss(wdev->wiphy, bss);
916 return;
917 }
918
919 ev->type = EVENT_ROAMED;
920 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
921 ev->rm.req_ie_len = req_ie_len;
922 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
923 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
924 ev->rm.resp_ie_len = resp_ie_len;
925 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
926 ev->rm.bss = bss;
927
928 spin_lock_irqsave(&wdev->event_lock, flags);
929 list_add_tail(&ev->list, &wdev->event_list);
930 spin_unlock_irqrestore(&wdev->event_lock, flags);
931 queue_work(cfg80211_wq, &rdev->event_work);
932}
933EXPORT_SYMBOL(cfg80211_roamed_bss);
934
935void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
936 size_t ie_len, u16 reason, bool from_ap)
937{
938 struct wireless_dev *wdev = dev->ieee80211_ptr;
939 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
940 int i;
941#ifdef CONFIG_CFG80211_WEXT
942 union iwreq_data wrqu;
943#endif
944
945 ASSERT_WDEV_LOCK(wdev);
946
947 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
948 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
949 return;
950
951 if (wdev->current_bss) {
952 cfg80211_unhold_bss(wdev->current_bss);
953 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
954 }
955
956 wdev->current_bss = NULL;
957 wdev->ssid_len = 0;
958
959 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
960
961 /* stop critical protocol if supported */
962 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
963 rdev->crit_proto_nlportid = 0;
964 rdev_crit_proto_stop(rdev, wdev);
965 }
966
967 /*
968 * Delete all the keys ... pairwise keys can't really
969 * exist any more anyway, but default keys might.
970 */
971 if (rdev->ops->del_key)
972 for (i = 0; i < 6; i++)
973 rdev_del_key(rdev, dev, i, false, NULL);
974
975 rdev_set_qos_map(rdev, dev, NULL);
976
977#ifdef CONFIG_CFG80211_WEXT
978 memset(&wrqu, 0, sizeof(wrqu));
979 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
980 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
981 wdev->wext.connect.ssid_len = 0;
982#endif
983
984 schedule_work(&cfg80211_disconnect_work);
985}
986
987void cfg80211_disconnected(struct net_device *dev, u16 reason,
988 const u8 *ie, size_t ie_len,
989 bool locally_generated, gfp_t gfp)
990{
991 struct wireless_dev *wdev = dev->ieee80211_ptr;
992 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
993 struct cfg80211_event *ev;
994 unsigned long flags;
995
996 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
997 if (!ev)
998 return;
999
1000 ev->type = EVENT_DISCONNECTED;
1001 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1002 ev->dc.ie_len = ie_len;
1003 memcpy((void *)ev->dc.ie, ie, ie_len);
1004 ev->dc.reason = reason;
1005 ev->dc.locally_generated = locally_generated;
1006
1007 spin_lock_irqsave(&wdev->event_lock, flags);
1008 list_add_tail(&ev->list, &wdev->event_list);
1009 spin_unlock_irqrestore(&wdev->event_lock, flags);
1010 queue_work(cfg80211_wq, &rdev->event_work);
1011}
1012EXPORT_SYMBOL(cfg80211_disconnected);
1013
1014/*
1015 * API calls for nl80211/wext compatibility code
1016 */
1017int cfg80211_connect(struct cfg80211_registered_device *rdev,
1018 struct net_device *dev,
1019 struct cfg80211_connect_params *connect,
1020 struct cfg80211_cached_keys *connkeys,
1021 const u8 *prev_bssid)
1022{
1023 struct wireless_dev *wdev = dev->ieee80211_ptr;
1024 int err;
1025
1026 ASSERT_WDEV_LOCK(wdev);
1027
1028 if (WARN_ON(wdev->connect_keys)) {
1029 kzfree(wdev->connect_keys);
1030 wdev->connect_keys = NULL;
1031 }
1032
1033 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1034 rdev->wiphy.ht_capa_mod_mask);
1035
1036 if (connkeys && connkeys->def >= 0) {
1037 int idx;
1038 u32 cipher;
1039
1040 idx = connkeys->def;
1041 cipher = connkeys->params[idx].cipher;
1042 /* If given a WEP key we may need it for shared key auth */
1043 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1044 cipher == WLAN_CIPHER_SUITE_WEP104) {
1045 connect->key_idx = idx;
1046 connect->key = connkeys->params[idx].key;
1047 connect->key_len = connkeys->params[idx].key_len;
1048
1049 /*
1050 * If ciphers are not set (e.g. when going through
1051 * iwconfig), we have to set them appropriately here.
1052 */
1053 if (connect->crypto.cipher_group == 0)
1054 connect->crypto.cipher_group = cipher;
1055
1056 if (connect->crypto.n_ciphers_pairwise == 0) {
1057 connect->crypto.n_ciphers_pairwise = 1;
1058 connect->crypto.ciphers_pairwise[0] = cipher;
1059 }
1060 }
1061
1062 connect->crypto.wep_keys = connkeys->params;
1063 connect->crypto.wep_tx_key = connkeys->def;
1064 } else {
1065 if (WARN_ON(connkeys))
1066 return -EINVAL;
1067 }
1068
1069 wdev->connect_keys = connkeys;
1070 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1071 wdev->ssid_len = connect->ssid_len;
1072
1073 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1074 IEEE80211_BSS_TYPE_ESS;
1075
1076 if (!rdev->ops->connect)
1077 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1078 else
1079 err = rdev_connect(rdev, dev, connect);
1080
1081 if (err) {
1082 wdev->connect_keys = NULL;
1083 wdev->ssid_len = 0;
1084 return err;
1085 }
1086
1087 return 0;
1088}
1089
1090int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1091 struct net_device *dev, u16 reason, bool wextev)
1092{
1093 struct wireless_dev *wdev = dev->ieee80211_ptr;
1094 int err = 0;
1095
1096 ASSERT_WDEV_LOCK(wdev);
1097
1098 kzfree(wdev->connect_keys);
1099 wdev->connect_keys = NULL;
1100
1101 if (wdev->conn)
1102 err = cfg80211_sme_disconnect(wdev, reason);
1103 else if (!rdev->ops->disconnect)
1104 cfg80211_mlme_down(rdev, dev);
1105 else if (wdev->ssid_len)
1106 err = rdev_disconnect(rdev, dev, reason);
1107
1108 return err;
1109}
1/*
2 * SME code for cfg80211
3 * both driver SME event handling and the SME implementation
4 * (for nl80211's connect() and wext)
5 *
6 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (C) 2009 Intel Corporation. All rights reserved.
8 */
9
10#include <linux/etherdevice.h>
11#include <linux/if_arp.h>
12#include <linux/slab.h>
13#include <linux/workqueue.h>
14#include <linux/wireless.h>
15#include <linux/export.h>
16#include <net/iw_handler.h>
17#include <net/cfg80211.h>
18#include <net/rtnetlink.h>
19#include "nl80211.h"
20#include "reg.h"
21#include "rdev-ops.h"
22
23/*
24 * Software SME in cfg80211, using auth/assoc/deauth calls to the
25 * driver. This is is for implementing nl80211's connect/disconnect
26 * and wireless extensions (if configured.)
27 */
28
29struct cfg80211_conn {
30 struct cfg80211_connect_params params;
31 /* these are sub-states of the _CONNECTING sme_state */
32 enum {
33 CFG80211_CONN_SCANNING,
34 CFG80211_CONN_SCAN_AGAIN,
35 CFG80211_CONN_AUTHENTICATE_NEXT,
36 CFG80211_CONN_AUTHENTICATING,
37 CFG80211_CONN_AUTH_FAILED,
38 CFG80211_CONN_ASSOCIATE_NEXT,
39 CFG80211_CONN_ASSOCIATING,
40 CFG80211_CONN_ASSOC_FAILED,
41 CFG80211_CONN_DEAUTH,
42 CFG80211_CONN_CONNECTED,
43 } state;
44 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
45 const u8 *ie;
46 size_t ie_len;
47 bool auto_auth, prev_bssid_valid;
48};
49
50static void cfg80211_sme_free(struct wireless_dev *wdev)
51{
52 if (!wdev->conn)
53 return;
54
55 kfree(wdev->conn->ie);
56 kfree(wdev->conn);
57 wdev->conn = NULL;
58}
59
60static int cfg80211_conn_scan(struct wireless_dev *wdev)
61{
62 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
63 struct cfg80211_scan_request *request;
64 int n_channels, err;
65
66 ASSERT_RTNL();
67 ASSERT_WDEV_LOCK(wdev);
68
69 if (rdev->scan_req || rdev->scan_msg)
70 return -EBUSY;
71
72 if (wdev->conn->params.channel)
73 n_channels = 1;
74 else
75 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
76
77 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
78 sizeof(request->channels[0]) * n_channels,
79 GFP_KERNEL);
80 if (!request)
81 return -ENOMEM;
82
83 if (wdev->conn->params.channel) {
84 enum ieee80211_band band = wdev->conn->params.channel->band;
85 struct ieee80211_supported_band *sband =
86 wdev->wiphy->bands[band];
87
88 if (!sband) {
89 kfree(request);
90 return -EINVAL;
91 }
92 request->channels[0] = wdev->conn->params.channel;
93 request->rates[band] = (1 << sband->n_bitrates) - 1;
94 } else {
95 int i = 0, j;
96 enum ieee80211_band band;
97 struct ieee80211_supported_band *bands;
98 struct ieee80211_channel *channel;
99
100 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
101 bands = wdev->wiphy->bands[band];
102 if (!bands)
103 continue;
104 for (j = 0; j < bands->n_channels; j++) {
105 channel = &bands->channels[j];
106 if (channel->flags & IEEE80211_CHAN_DISABLED)
107 continue;
108 request->channels[i++] = channel;
109 }
110 request->rates[band] = (1 << bands->n_bitrates) - 1;
111 }
112 n_channels = i;
113 }
114 request->n_channels = n_channels;
115 request->ssids = (void *)&request->channels[n_channels];
116 request->n_ssids = 1;
117
118 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
119 wdev->conn->params.ssid_len);
120 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
121
122 request->wdev = wdev;
123 request->wiphy = &rdev->wiphy;
124 request->scan_start = jiffies;
125
126 rdev->scan_req = request;
127
128 err = rdev_scan(rdev, request);
129 if (!err) {
130 wdev->conn->state = CFG80211_CONN_SCANNING;
131 nl80211_send_scan_start(rdev, wdev);
132 dev_hold(wdev->netdev);
133 } else {
134 rdev->scan_req = NULL;
135 kfree(request);
136 }
137 return err;
138}
139
140static int cfg80211_conn_do_work(struct wireless_dev *wdev)
141{
142 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
143 struct cfg80211_connect_params *params;
144 struct cfg80211_assoc_request req = {};
145 int err;
146
147 ASSERT_WDEV_LOCK(wdev);
148
149 if (!wdev->conn)
150 return 0;
151
152 params = &wdev->conn->params;
153
154 switch (wdev->conn->state) {
155 case CFG80211_CONN_SCANNING:
156 /* didn't find it during scan ... */
157 return -ENOENT;
158 case CFG80211_CONN_SCAN_AGAIN:
159 return cfg80211_conn_scan(wdev);
160 case CFG80211_CONN_AUTHENTICATE_NEXT:
161 if (WARN_ON(!rdev->ops->auth))
162 return -EOPNOTSUPP;
163 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
164 return cfg80211_mlme_auth(rdev, wdev->netdev,
165 params->channel, params->auth_type,
166 params->bssid,
167 params->ssid, params->ssid_len,
168 NULL, 0,
169 params->key, params->key_len,
170 params->key_idx, NULL, 0);
171 case CFG80211_CONN_AUTH_FAILED:
172 return -ENOTCONN;
173 case CFG80211_CONN_ASSOCIATE_NEXT:
174 if (WARN_ON(!rdev->ops->assoc))
175 return -EOPNOTSUPP;
176 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
177 if (wdev->conn->prev_bssid_valid)
178 req.prev_bssid = wdev->conn->prev_bssid;
179 req.ie = params->ie;
180 req.ie_len = params->ie_len;
181 req.use_mfp = params->mfp != NL80211_MFP_NO;
182 req.crypto = params->crypto;
183 req.flags = params->flags;
184 req.ht_capa = params->ht_capa;
185 req.ht_capa_mask = params->ht_capa_mask;
186 req.vht_capa = params->vht_capa;
187 req.vht_capa_mask = params->vht_capa_mask;
188
189 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
190 params->bssid, params->ssid,
191 params->ssid_len, &req);
192 if (err)
193 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
194 NULL, 0,
195 WLAN_REASON_DEAUTH_LEAVING,
196 false);
197 return err;
198 case CFG80211_CONN_ASSOC_FAILED:
199 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
200 NULL, 0,
201 WLAN_REASON_DEAUTH_LEAVING, false);
202 return -ENOTCONN;
203 case CFG80211_CONN_DEAUTH:
204 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
205 NULL, 0,
206 WLAN_REASON_DEAUTH_LEAVING, false);
207 /* free directly, disconnected event already sent */
208 cfg80211_sme_free(wdev);
209 return 0;
210 default:
211 return 0;
212 }
213}
214
215void cfg80211_conn_work(struct work_struct *work)
216{
217 struct cfg80211_registered_device *rdev =
218 container_of(work, struct cfg80211_registered_device, conn_work);
219 struct wireless_dev *wdev;
220 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
221
222 rtnl_lock();
223
224 list_for_each_entry(wdev, &rdev->wdev_list, list) {
225 if (!wdev->netdev)
226 continue;
227
228 wdev_lock(wdev);
229 if (!netif_running(wdev->netdev)) {
230 wdev_unlock(wdev);
231 continue;
232 }
233 if (!wdev->conn ||
234 wdev->conn->state == CFG80211_CONN_CONNECTED) {
235 wdev_unlock(wdev);
236 continue;
237 }
238 if (wdev->conn->params.bssid) {
239 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
240 bssid = bssid_buf;
241 }
242 if (cfg80211_conn_do_work(wdev)) {
243 __cfg80211_connect_result(
244 wdev->netdev, bssid,
245 NULL, 0, NULL, 0,
246 WLAN_STATUS_UNSPECIFIED_FAILURE,
247 false, NULL);
248 }
249 wdev_unlock(wdev);
250 }
251
252 rtnl_unlock();
253}
254
255/* Returned bss is reference counted and must be cleaned up appropriately. */
256static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
257{
258 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
259 struct cfg80211_bss *bss;
260
261 ASSERT_WDEV_LOCK(wdev);
262
263 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
264 wdev->conn->params.bssid,
265 wdev->conn->params.ssid,
266 wdev->conn->params.ssid_len,
267 wdev->conn_bss_type,
268 IEEE80211_PRIVACY(wdev->conn->params.privacy));
269 if (!bss)
270 return NULL;
271
272 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
273 wdev->conn->params.bssid = wdev->conn->bssid;
274 wdev->conn->params.channel = bss->channel;
275 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
276 schedule_work(&rdev->conn_work);
277
278 return bss;
279}
280
281static void __cfg80211_sme_scan_done(struct net_device *dev)
282{
283 struct wireless_dev *wdev = dev->ieee80211_ptr;
284 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
285 struct cfg80211_bss *bss;
286
287 ASSERT_WDEV_LOCK(wdev);
288
289 if (!wdev->conn)
290 return;
291
292 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
293 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
294 return;
295
296 bss = cfg80211_get_conn_bss(wdev);
297 if (bss)
298 cfg80211_put_bss(&rdev->wiphy, bss);
299 else
300 schedule_work(&rdev->conn_work);
301}
302
303void cfg80211_sme_scan_done(struct net_device *dev)
304{
305 struct wireless_dev *wdev = dev->ieee80211_ptr;
306
307 wdev_lock(wdev);
308 __cfg80211_sme_scan_done(dev);
309 wdev_unlock(wdev);
310}
311
312void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
313{
314 struct wiphy *wiphy = wdev->wiphy;
315 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
316 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
317 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
318
319 ASSERT_WDEV_LOCK(wdev);
320
321 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
322 return;
323
324 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
325 wdev->conn->auto_auth &&
326 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
327 /* select automatically between only open, shared, leap */
328 switch (wdev->conn->params.auth_type) {
329 case NL80211_AUTHTYPE_OPEN_SYSTEM:
330 if (wdev->connect_keys)
331 wdev->conn->params.auth_type =
332 NL80211_AUTHTYPE_SHARED_KEY;
333 else
334 wdev->conn->params.auth_type =
335 NL80211_AUTHTYPE_NETWORK_EAP;
336 break;
337 case NL80211_AUTHTYPE_SHARED_KEY:
338 wdev->conn->params.auth_type =
339 NL80211_AUTHTYPE_NETWORK_EAP;
340 break;
341 default:
342 /* huh? */
343 wdev->conn->params.auth_type =
344 NL80211_AUTHTYPE_OPEN_SYSTEM;
345 break;
346 }
347 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
348 schedule_work(&rdev->conn_work);
349 } else if (status_code != WLAN_STATUS_SUCCESS) {
350 __cfg80211_connect_result(wdev->netdev, mgmt->bssid,
351 NULL, 0, NULL, 0,
352 status_code, false, NULL);
353 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
354 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
355 schedule_work(&rdev->conn_work);
356 }
357}
358
359bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
360{
361 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
362
363 if (!wdev->conn)
364 return false;
365
366 if (status == WLAN_STATUS_SUCCESS) {
367 wdev->conn->state = CFG80211_CONN_CONNECTED;
368 return false;
369 }
370
371 if (wdev->conn->prev_bssid_valid) {
372 /*
373 * Some stupid APs don't accept reassoc, so we
374 * need to fall back to trying regular assoc;
375 * return true so no event is sent to userspace.
376 */
377 wdev->conn->prev_bssid_valid = false;
378 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
379 schedule_work(&rdev->conn_work);
380 return true;
381 }
382
383 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
384 schedule_work(&rdev->conn_work);
385 return false;
386}
387
388void cfg80211_sme_deauth(struct wireless_dev *wdev)
389{
390 cfg80211_sme_free(wdev);
391}
392
393void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
394{
395 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
396
397 if (!wdev->conn)
398 return;
399
400 wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
401 schedule_work(&rdev->conn_work);
402}
403
404void cfg80211_sme_disassoc(struct wireless_dev *wdev)
405{
406 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
407
408 if (!wdev->conn)
409 return;
410
411 wdev->conn->state = CFG80211_CONN_DEAUTH;
412 schedule_work(&rdev->conn_work);
413}
414
415void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
416{
417 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
418
419 if (!wdev->conn)
420 return;
421
422 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
423 schedule_work(&rdev->conn_work);
424}
425
426static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
427 const u8 *ies, size_t ies_len,
428 const u8 **out_ies, size_t *out_ies_len)
429{
430 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
431 u8 *buf;
432 size_t offs;
433
434 if (!rdev->wiphy.extended_capabilities_len ||
435 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
436 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
437 if (!*out_ies)
438 return -ENOMEM;
439 *out_ies_len = ies_len;
440 return 0;
441 }
442
443 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
444 GFP_KERNEL);
445 if (!buf)
446 return -ENOMEM;
447
448 if (ies_len) {
449 static const u8 before_extcapa[] = {
450 /* not listing IEs expected to be created by driver */
451 WLAN_EID_RSN,
452 WLAN_EID_QOS_CAPA,
453 WLAN_EID_RRM_ENABLED_CAPABILITIES,
454 WLAN_EID_MOBILITY_DOMAIN,
455 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
456 WLAN_EID_BSS_COEX_2040,
457 };
458
459 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
460 ARRAY_SIZE(before_extcapa), 0);
461 memcpy(buf, ies, offs);
462 /* leave a whole for extended capabilities IE */
463 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
464 ies + offs, ies_len - offs);
465 } else {
466 offs = 0;
467 }
468
469 /* place extended capabilities IE (with only driver capabilities) */
470 buf[offs] = WLAN_EID_EXT_CAPABILITY;
471 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
472 memcpy(buf + offs + 2,
473 rdev->wiphy.extended_capabilities,
474 rdev->wiphy.extended_capabilities_len);
475
476 *out_ies = buf;
477 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
478
479 return 0;
480}
481
482static int cfg80211_sme_connect(struct wireless_dev *wdev,
483 struct cfg80211_connect_params *connect,
484 const u8 *prev_bssid)
485{
486 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
487 struct cfg80211_bss *bss;
488 int err;
489
490 if (!rdev->ops->auth || !rdev->ops->assoc)
491 return -EOPNOTSUPP;
492
493 if (wdev->current_bss)
494 return -EALREADY;
495
496 if (WARN_ON(wdev->conn))
497 return -EINPROGRESS;
498
499 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
500 if (!wdev->conn)
501 return -ENOMEM;
502
503 /*
504 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
505 */
506 memcpy(&wdev->conn->params, connect, sizeof(*connect));
507 if (connect->bssid) {
508 wdev->conn->params.bssid = wdev->conn->bssid;
509 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
510 }
511
512 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
513 &wdev->conn->ie,
514 &wdev->conn->params.ie_len)) {
515 kfree(wdev->conn);
516 wdev->conn = NULL;
517 return -ENOMEM;
518 }
519 wdev->conn->params.ie = wdev->conn->ie;
520
521 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
522 wdev->conn->auto_auth = true;
523 /* start with open system ... should mostly work */
524 wdev->conn->params.auth_type =
525 NL80211_AUTHTYPE_OPEN_SYSTEM;
526 } else {
527 wdev->conn->auto_auth = false;
528 }
529
530 wdev->conn->params.ssid = wdev->ssid;
531 wdev->conn->params.ssid_len = wdev->ssid_len;
532
533 /* see if we have the bss already */
534 bss = cfg80211_get_conn_bss(wdev);
535
536 if (prev_bssid) {
537 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
538 wdev->conn->prev_bssid_valid = true;
539 }
540
541 /* we're good if we have a matching bss struct */
542 if (bss) {
543 err = cfg80211_conn_do_work(wdev);
544 cfg80211_put_bss(wdev->wiphy, bss);
545 } else {
546 /* otherwise we'll need to scan for the AP first */
547 err = cfg80211_conn_scan(wdev);
548
549 /*
550 * If we can't scan right now, then we need to scan again
551 * after the current scan finished, since the parameters
552 * changed (unless we find a good AP anyway).
553 */
554 if (err == -EBUSY) {
555 err = 0;
556 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
557 }
558 }
559
560 if (err)
561 cfg80211_sme_free(wdev);
562
563 return err;
564}
565
566static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
567{
568 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
569 int err;
570
571 if (!wdev->conn)
572 return 0;
573
574 if (!rdev->ops->deauth)
575 return -EOPNOTSUPP;
576
577 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
578 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
579 err = 0;
580 goto out;
581 }
582
583 /* wdev->conn->params.bssid must be set if > SCANNING */
584 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
585 wdev->conn->params.bssid,
586 NULL, 0, reason, false);
587 out:
588 cfg80211_sme_free(wdev);
589 return err;
590}
591
592/*
593 * code shared for in-device and software SME
594 */
595
596static bool cfg80211_is_all_idle(void)
597{
598 struct cfg80211_registered_device *rdev;
599 struct wireless_dev *wdev;
600 bool is_all_idle = true;
601
602 /*
603 * All devices must be idle as otherwise if you are actively
604 * scanning some new beacon hints could be learned and would
605 * count as new regulatory hints.
606 */
607 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
608 list_for_each_entry(wdev, &rdev->wdev_list, list) {
609 wdev_lock(wdev);
610 if (wdev->conn || wdev->current_bss)
611 is_all_idle = false;
612 wdev_unlock(wdev);
613 }
614 }
615
616 return is_all_idle;
617}
618
619static void disconnect_work(struct work_struct *work)
620{
621 rtnl_lock();
622 if (cfg80211_is_all_idle())
623 regulatory_hint_disconnect();
624 rtnl_unlock();
625}
626
627static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
628
629
630/*
631 * API calls for drivers implementing connect/disconnect and
632 * SME event handling
633 */
634
635/* This method must consume bss one way or another */
636void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
637 const u8 *req_ie, size_t req_ie_len,
638 const u8 *resp_ie, size_t resp_ie_len,
639 u16 status, bool wextev,
640 struct cfg80211_bss *bss)
641{
642 struct wireless_dev *wdev = dev->ieee80211_ptr;
643 const u8 *country_ie;
644#ifdef CONFIG_CFG80211_WEXT
645 union iwreq_data wrqu;
646#endif
647
648 ASSERT_WDEV_LOCK(wdev);
649
650 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
651 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
652 cfg80211_put_bss(wdev->wiphy, bss);
653 return;
654 }
655
656 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev,
657 bssid, req_ie, req_ie_len,
658 resp_ie, resp_ie_len,
659 status, GFP_KERNEL);
660
661#ifdef CONFIG_CFG80211_WEXT
662 if (wextev) {
663 if (req_ie && status == WLAN_STATUS_SUCCESS) {
664 memset(&wrqu, 0, sizeof(wrqu));
665 wrqu.data.length = req_ie_len;
666 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
667 }
668
669 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
670 memset(&wrqu, 0, sizeof(wrqu));
671 wrqu.data.length = resp_ie_len;
672 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
673 }
674
675 memset(&wrqu, 0, sizeof(wrqu));
676 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
677 if (bssid && status == WLAN_STATUS_SUCCESS) {
678 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
679 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
680 wdev->wext.prev_bssid_valid = true;
681 }
682 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
683 }
684#endif
685
686 if (!bss && (status == WLAN_STATUS_SUCCESS)) {
687 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
688 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
689 wdev->ssid, wdev->ssid_len,
690 wdev->conn_bss_type,
691 IEEE80211_PRIVACY_ANY);
692 if (bss)
693 cfg80211_hold_bss(bss_from_pub(bss));
694 }
695
696 if (wdev->current_bss) {
697 cfg80211_unhold_bss(wdev->current_bss);
698 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
699 wdev->current_bss = NULL;
700 }
701
702 if (status != WLAN_STATUS_SUCCESS) {
703 kzfree(wdev->connect_keys);
704 wdev->connect_keys = NULL;
705 wdev->ssid_len = 0;
706 if (bss) {
707 cfg80211_unhold_bss(bss_from_pub(bss));
708 cfg80211_put_bss(wdev->wiphy, bss);
709 }
710 cfg80211_sme_free(wdev);
711 return;
712 }
713
714 if (WARN_ON(!bss))
715 return;
716
717 wdev->current_bss = bss_from_pub(bss);
718
719 cfg80211_upload_connect_keys(wdev);
720
721 rcu_read_lock();
722 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
723 if (!country_ie) {
724 rcu_read_unlock();
725 return;
726 }
727
728 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
729 rcu_read_unlock();
730
731 if (!country_ie)
732 return;
733
734 /*
735 * ieee80211_bss_get_ie() ensures we can access:
736 * - country_ie + 2, the start of the country ie data, and
737 * - and country_ie[1] which is the IE length
738 */
739 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
740 country_ie + 2, country_ie[1]);
741 kfree(country_ie);
742}
743
744void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
745 const u8 *req_ie, size_t req_ie_len,
746 const u8 *resp_ie, size_t resp_ie_len,
747 u16 status, gfp_t gfp)
748{
749 struct wireless_dev *wdev = dev->ieee80211_ptr;
750 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
751 struct cfg80211_event *ev;
752 unsigned long flags;
753
754 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
755 if (!ev)
756 return;
757
758 ev->type = EVENT_CONNECT_RESULT;
759 if (bssid)
760 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
761 if (req_ie_len) {
762 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
763 ev->cr.req_ie_len = req_ie_len;
764 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
765 }
766 if (resp_ie_len) {
767 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
768 ev->cr.resp_ie_len = resp_ie_len;
769 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
770 }
771 ev->cr.status = status;
772
773 spin_lock_irqsave(&wdev->event_lock, flags);
774 list_add_tail(&ev->list, &wdev->event_list);
775 spin_unlock_irqrestore(&wdev->event_lock, flags);
776 queue_work(cfg80211_wq, &rdev->event_work);
777}
778EXPORT_SYMBOL(cfg80211_connect_result);
779
780/* Consumes bss object one way or another */
781void __cfg80211_roamed(struct wireless_dev *wdev,
782 struct cfg80211_bss *bss,
783 const u8 *req_ie, size_t req_ie_len,
784 const u8 *resp_ie, size_t resp_ie_len)
785{
786#ifdef CONFIG_CFG80211_WEXT
787 union iwreq_data wrqu;
788#endif
789 ASSERT_WDEV_LOCK(wdev);
790
791 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
792 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
793 goto out;
794
795 if (WARN_ON(!wdev->current_bss))
796 goto out;
797
798 cfg80211_unhold_bss(wdev->current_bss);
799 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
800 wdev->current_bss = NULL;
801
802 cfg80211_hold_bss(bss_from_pub(bss));
803 wdev->current_bss = bss_from_pub(bss);
804
805 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
806 wdev->netdev, bss->bssid,
807 req_ie, req_ie_len, resp_ie, resp_ie_len,
808 GFP_KERNEL);
809
810#ifdef CONFIG_CFG80211_WEXT
811 if (req_ie) {
812 memset(&wrqu, 0, sizeof(wrqu));
813 wrqu.data.length = req_ie_len;
814 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
815 &wrqu, req_ie);
816 }
817
818 if (resp_ie) {
819 memset(&wrqu, 0, sizeof(wrqu));
820 wrqu.data.length = resp_ie_len;
821 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
822 &wrqu, resp_ie);
823 }
824
825 memset(&wrqu, 0, sizeof(wrqu));
826 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
827 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
828 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
829 wdev->wext.prev_bssid_valid = true;
830 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
831#endif
832
833 return;
834out:
835 cfg80211_put_bss(wdev->wiphy, bss);
836}
837
838void cfg80211_roamed(struct net_device *dev,
839 struct ieee80211_channel *channel,
840 const u8 *bssid,
841 const u8 *req_ie, size_t req_ie_len,
842 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
843{
844 struct wireless_dev *wdev = dev->ieee80211_ptr;
845 struct cfg80211_bss *bss;
846
847 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
848 wdev->ssid_len,
849 wdev->conn_bss_type, IEEE80211_PRIVACY_ANY);
850 if (WARN_ON(!bss))
851 return;
852
853 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
854 resp_ie_len, gfp);
855}
856EXPORT_SYMBOL(cfg80211_roamed);
857
858/* Consumes bss object one way or another */
859void cfg80211_roamed_bss(struct net_device *dev,
860 struct cfg80211_bss *bss, const u8 *req_ie,
861 size_t req_ie_len, const u8 *resp_ie,
862 size_t resp_ie_len, gfp_t gfp)
863{
864 struct wireless_dev *wdev = dev->ieee80211_ptr;
865 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
866 struct cfg80211_event *ev;
867 unsigned long flags;
868
869 if (WARN_ON(!bss))
870 return;
871
872 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
873 if (!ev) {
874 cfg80211_put_bss(wdev->wiphy, bss);
875 return;
876 }
877
878 ev->type = EVENT_ROAMED;
879 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
880 ev->rm.req_ie_len = req_ie_len;
881 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
882 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
883 ev->rm.resp_ie_len = resp_ie_len;
884 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
885 ev->rm.bss = bss;
886
887 spin_lock_irqsave(&wdev->event_lock, flags);
888 list_add_tail(&ev->list, &wdev->event_list);
889 spin_unlock_irqrestore(&wdev->event_lock, flags);
890 queue_work(cfg80211_wq, &rdev->event_work);
891}
892EXPORT_SYMBOL(cfg80211_roamed_bss);
893
894void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
895 size_t ie_len, u16 reason, bool from_ap)
896{
897 struct wireless_dev *wdev = dev->ieee80211_ptr;
898 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
899 int i;
900#ifdef CONFIG_CFG80211_WEXT
901 union iwreq_data wrqu;
902#endif
903
904 ASSERT_WDEV_LOCK(wdev);
905
906 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
907 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
908 return;
909
910 if (wdev->current_bss) {
911 cfg80211_unhold_bss(wdev->current_bss);
912 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
913 }
914
915 wdev->current_bss = NULL;
916 wdev->ssid_len = 0;
917
918 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
919
920 /* stop critical protocol if supported */
921 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
922 rdev->crit_proto_nlportid = 0;
923 rdev_crit_proto_stop(rdev, wdev);
924 }
925
926 /*
927 * Delete all the keys ... pairwise keys can't really
928 * exist any more anyway, but default keys might.
929 */
930 if (rdev->ops->del_key)
931 for (i = 0; i < 6; i++)
932 rdev_del_key(rdev, dev, i, false, NULL);
933
934 rdev_set_qos_map(rdev, dev, NULL);
935
936#ifdef CONFIG_CFG80211_WEXT
937 memset(&wrqu, 0, sizeof(wrqu));
938 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
939 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
940 wdev->wext.connect.ssid_len = 0;
941#endif
942
943 schedule_work(&cfg80211_disconnect_work);
944}
945
946void cfg80211_disconnected(struct net_device *dev, u16 reason,
947 const u8 *ie, size_t ie_len,
948 bool locally_generated, gfp_t gfp)
949{
950 struct wireless_dev *wdev = dev->ieee80211_ptr;
951 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
952 struct cfg80211_event *ev;
953 unsigned long flags;
954
955 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
956 if (!ev)
957 return;
958
959 ev->type = EVENT_DISCONNECTED;
960 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
961 ev->dc.ie_len = ie_len;
962 memcpy((void *)ev->dc.ie, ie, ie_len);
963 ev->dc.reason = reason;
964 ev->dc.locally_generated = locally_generated;
965
966 spin_lock_irqsave(&wdev->event_lock, flags);
967 list_add_tail(&ev->list, &wdev->event_list);
968 spin_unlock_irqrestore(&wdev->event_lock, flags);
969 queue_work(cfg80211_wq, &rdev->event_work);
970}
971EXPORT_SYMBOL(cfg80211_disconnected);
972
973/*
974 * API calls for nl80211/wext compatibility code
975 */
976int cfg80211_connect(struct cfg80211_registered_device *rdev,
977 struct net_device *dev,
978 struct cfg80211_connect_params *connect,
979 struct cfg80211_cached_keys *connkeys,
980 const u8 *prev_bssid)
981{
982 struct wireless_dev *wdev = dev->ieee80211_ptr;
983 int err;
984
985 ASSERT_WDEV_LOCK(wdev);
986
987 if (WARN_ON(wdev->connect_keys)) {
988 kzfree(wdev->connect_keys);
989 wdev->connect_keys = NULL;
990 }
991
992 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
993 rdev->wiphy.ht_capa_mod_mask);
994
995 if (connkeys && connkeys->def >= 0) {
996 int idx;
997 u32 cipher;
998
999 idx = connkeys->def;
1000 cipher = connkeys->params[idx].cipher;
1001 /* If given a WEP key we may need it for shared key auth */
1002 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1003 cipher == WLAN_CIPHER_SUITE_WEP104) {
1004 connect->key_idx = idx;
1005 connect->key = connkeys->params[idx].key;
1006 connect->key_len = connkeys->params[idx].key_len;
1007
1008 /*
1009 * If ciphers are not set (e.g. when going through
1010 * iwconfig), we have to set them appropriately here.
1011 */
1012 if (connect->crypto.cipher_group == 0)
1013 connect->crypto.cipher_group = cipher;
1014
1015 if (connect->crypto.n_ciphers_pairwise == 0) {
1016 connect->crypto.n_ciphers_pairwise = 1;
1017 connect->crypto.ciphers_pairwise[0] = cipher;
1018 }
1019 }
1020 }
1021
1022 wdev->connect_keys = connkeys;
1023 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1024 wdev->ssid_len = connect->ssid_len;
1025
1026 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1027 IEEE80211_BSS_TYPE_ESS;
1028
1029 if (!rdev->ops->connect)
1030 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1031 else
1032 err = rdev_connect(rdev, dev, connect);
1033
1034 if (err) {
1035 wdev->connect_keys = NULL;
1036 wdev->ssid_len = 0;
1037 return err;
1038 }
1039
1040 return 0;
1041}
1042
1043int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1044 struct net_device *dev, u16 reason, bool wextev)
1045{
1046 struct wireless_dev *wdev = dev->ieee80211_ptr;
1047 int err = 0;
1048
1049 ASSERT_WDEV_LOCK(wdev);
1050
1051 kzfree(wdev->connect_keys);
1052 wdev->connect_keys = NULL;
1053
1054 if (wdev->conn)
1055 err = cfg80211_sme_disconnect(wdev, reason);
1056 else if (!rdev->ops->disconnect)
1057 cfg80211_mlme_down(rdev, dev);
1058 else if (wdev->current_bss)
1059 err = rdev_disconnect(rdev, dev, reason);
1060
1061 return err;
1062}