1
2
3
4
5
6
7#include <linux/etherdevice.h>
8#include <linux/if_arp.h>
9#include <linux/slab.h>
10#include <linux/export.h>
11#include <net/cfg80211.h>
12#include "wext-compat.h"
13#include "nl80211.h"
14#include "rdev-ops.h"
15
16
17void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
18 struct ieee80211_channel *channel)
19{
20 struct wireless_dev *wdev = dev->ieee80211_ptr;
21 struct cfg80211_bss *bss;
22#ifdef CONFIG_CFG80211_WEXT
23 union iwreq_data wrqu;
24#endif
25
26 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
27 return;
28
29 if (!wdev->ssid_len)
30 return;
31
32 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
33 IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);
34
35 if (WARN_ON(!bss))
36 return;
37
38 if (wdev->current_bss) {
39 cfg80211_unhold_bss(wdev->current_bss);
40 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
41 }
42
43 cfg80211_hold_bss(bss_from_pub(bss));
44 wdev->current_bss = bss_from_pub(bss);
45
46 cfg80211_upload_connect_keys(wdev);
47
48 nl80211_send_ibss_bssid(wiphy_to_rdev(wdev->wiphy), dev, bssid,
49 GFP_KERNEL);
50#ifdef CONFIG_CFG80211_WEXT
51 memset(&wrqu, 0, sizeof(wrqu));
52 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
53 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
54#endif
55}
56
57void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
58 struct ieee80211_channel *channel, gfp_t gfp)
59{
60 struct wireless_dev *wdev = dev->ieee80211_ptr;
61 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
62 struct cfg80211_event *ev;
63 unsigned long flags;
64
65 trace_cfg80211_ibss_joined(dev, bssid, channel);
66
67 if (WARN_ON(!channel))
68 return;
69
70 ev = kzalloc(sizeof(*ev), gfp);
71 if (!ev)
72 return;
73
74 ev->type = EVENT_IBSS_JOINED;
75 memcpy(ev->ij.bssid, bssid, ETH_ALEN);
76 ev->ij.channel = channel;
77
78 spin_lock_irqsave(&wdev->event_lock, flags);
79 list_add_tail(&ev->list, &wdev->event_list);
80 spin_unlock_irqrestore(&wdev->event_lock, flags);
81 queue_work(cfg80211_wq, &rdev->event_work);
82}
83EXPORT_SYMBOL(cfg80211_ibss_joined);
84
85static int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
86 struct net_device *dev,
87 struct cfg80211_ibss_params *params,
88 struct cfg80211_cached_keys *connkeys)
89{
90 struct wireless_dev *wdev = dev->ieee80211_ptr;
91 int err;
92
93 ASSERT_WDEV_LOCK(wdev);
94
95 if (wdev->ssid_len)
96 return -EALREADY;
97
98 if (!params->basic_rates) {
99
100
101
102
103
104 struct ieee80211_supported_band *sband =
105 rdev->wiphy.bands[params->chandef.chan->band];
106 int j;
107 u32 flag = params->chandef.chan->band == IEEE80211_BAND_5GHZ ?
108 IEEE80211_RATE_MANDATORY_A :
109 IEEE80211_RATE_MANDATORY_B;
110
111 for (j = 0; j < sband->n_bitrates; j++) {
112 if (sband->bitrates[j].flags & flag)
113 params->basic_rates |= BIT(j);
114 }
115 }
116
117 if (WARN_ON(wdev->connect_keys))
118 kzfree(wdev->connect_keys);
119 wdev->connect_keys = connkeys;
120
121 wdev->ibss_fixed = params->channel_fixed;
122 wdev->ibss_dfs_possible = params->userspace_handles_dfs;
123 wdev->chandef = params->chandef;
124#ifdef CONFIG_CFG80211_WEXT
125 wdev->wext.ibss.chandef = params->chandef;
126#endif
127 err = rdev_join_ibss(rdev, dev, params);
128 if (err) {
129 wdev->connect_keys = NULL;
130 return err;
131 }
132
133 memcpy(wdev->ssid, params->ssid, params->ssid_len);
134 wdev->ssid_len = params->ssid_len;
135
136 return 0;
137}
138
139int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
140 struct net_device *dev,
141 struct cfg80211_ibss_params *params,
142 struct cfg80211_cached_keys *connkeys)
143{
144 struct wireless_dev *wdev = dev->ieee80211_ptr;
145 int err;
146
147 ASSERT_RTNL();
148
149 wdev_lock(wdev);
150 err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
151 wdev_unlock(wdev);
152
153 return err;
154}
155
156static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
157{
158 struct wireless_dev *wdev = dev->ieee80211_ptr;
159 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
160 int i;
161
162 ASSERT_WDEV_LOCK(wdev);
163
164 kzfree(wdev->connect_keys);
165 wdev->connect_keys = NULL;
166
167 rdev_set_qos_map(rdev, dev, NULL);
168
169
170
171
172
173 if (rdev->ops->del_key)
174 for (i = 0; i < 6; i++)
175 rdev_del_key(rdev, dev, i, false, NULL);
176
177 if (wdev->current_bss) {
178 cfg80211_unhold_bss(wdev->current_bss);
179 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
180 }
181
182 wdev->current_bss = NULL;
183 wdev->ssid_len = 0;
184 memset(&wdev->chandef, 0, sizeof(wdev->chandef));
185#ifdef CONFIG_CFG80211_WEXT
186 if (!nowext)
187 wdev->wext.ibss.ssid_len = 0;
188#endif
189}
190
191void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
192{
193 struct wireless_dev *wdev = dev->ieee80211_ptr;
194
195 wdev_lock(wdev);
196 __cfg80211_clear_ibss(dev, nowext);
197 wdev_unlock(wdev);
198}
199
200int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
201 struct net_device *dev, bool nowext)
202{
203 struct wireless_dev *wdev = dev->ieee80211_ptr;
204 int err;
205
206 ASSERT_WDEV_LOCK(wdev);
207
208 if (!wdev->ssid_len)
209 return -ENOLINK;
210
211 err = rdev_leave_ibss(rdev, dev);
212
213 if (err)
214 return err;
215
216 __cfg80211_clear_ibss(dev, nowext);
217
218 return 0;
219}
220
221int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
222 struct net_device *dev, bool nowext)
223{
224 struct wireless_dev *wdev = dev->ieee80211_ptr;
225 int err;
226
227 wdev_lock(wdev);
228 err = __cfg80211_leave_ibss(rdev, dev, nowext);
229 wdev_unlock(wdev);
230
231 return err;
232}
233
234#ifdef CONFIG_CFG80211_WEXT
235int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
236 struct wireless_dev *wdev)
237{
238 struct cfg80211_cached_keys *ck = NULL;
239 enum ieee80211_band band;
240 int i, err;
241
242 ASSERT_WDEV_LOCK(wdev);
243
244 if (!wdev->wext.ibss.beacon_interval)
245 wdev->wext.ibss.beacon_interval = 100;
246
247
248 if (!wdev->wext.ibss.chandef.chan) {
249 struct ieee80211_channel *new_chan = NULL;
250
251 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
252 struct ieee80211_supported_band *sband;
253 struct ieee80211_channel *chan;
254
255 sband = rdev->wiphy.bands[band];
256 if (!sband)
257 continue;
258
259 for (i = 0; i < sband->n_channels; i++) {
260 chan = &sband->channels[i];
261 if (chan->flags & IEEE80211_CHAN_NO_IR)
262 continue;
263 if (chan->flags & IEEE80211_CHAN_DISABLED)
264 continue;
265 new_chan = chan;
266 break;
267 }
268
269 if (new_chan)
270 break;
271 }
272
273 if (!new_chan)
274 return -EINVAL;
275
276 cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
277 NL80211_CHAN_NO_HT);
278 }
279
280
281 if (!wdev->wext.ibss.ssid_len)
282 return 0;
283
284 if (!netif_running(wdev->netdev))
285 return 0;
286
287 if (wdev->wext.keys) {
288 wdev->wext.keys->def = wdev->wext.default_key;
289 wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
290 }
291
292 wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
293
294 if (wdev->wext.keys) {
295 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
296 if (!ck)
297 return -ENOMEM;
298 for (i = 0; i < 6; i++)
299 ck->params[i].key = ck->data[i];
300 }
301 err = __cfg80211_join_ibss(rdev, wdev->netdev,
302 &wdev->wext.ibss, ck);
303 if (err)
304 kfree(ck);
305
306 return err;
307}
308
309int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
310 struct iw_request_info *info,
311 struct iw_freq *wextfreq, char *extra)
312{
313 struct wireless_dev *wdev = dev->ieee80211_ptr;
314 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
315 struct ieee80211_channel *chan = NULL;
316 int err, freq;
317
318
319 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
320 return -EINVAL;
321
322 if (!rdev->ops->join_ibss)
323 return -EOPNOTSUPP;
324
325 freq = cfg80211_wext_freq(wextfreq);
326 if (freq < 0)
327 return freq;
328
329 if (freq) {
330 chan = ieee80211_get_channel(wdev->wiphy, freq);
331 if (!chan)
332 return -EINVAL;
333 if (chan->flags & IEEE80211_CHAN_NO_IR ||
334 chan->flags & IEEE80211_CHAN_DISABLED)
335 return -EINVAL;
336 }
337
338 if (wdev->wext.ibss.chandef.chan == chan)
339 return 0;
340
341 wdev_lock(wdev);
342 err = 0;
343 if (wdev->ssid_len)
344 err = __cfg80211_leave_ibss(rdev, dev, true);
345 wdev_unlock(wdev);
346
347 if (err)
348 return err;
349
350 if (chan) {
351 cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
352 NL80211_CHAN_NO_HT);
353 wdev->wext.ibss.channel_fixed = true;
354 } else {
355
356 wdev->wext.ibss.channel_fixed = false;
357 }
358
359 wdev_lock(wdev);
360 err = cfg80211_ibss_wext_join(rdev, wdev);
361 wdev_unlock(wdev);
362
363 return err;
364}
365
366int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
367 struct iw_request_info *info,
368 struct iw_freq *freq, char *extra)
369{
370 struct wireless_dev *wdev = dev->ieee80211_ptr;
371 struct ieee80211_channel *chan = NULL;
372
373
374 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
375 return -EINVAL;
376
377 wdev_lock(wdev);
378 if (wdev->current_bss)
379 chan = wdev->current_bss->pub.channel;
380 else if (wdev->wext.ibss.chandef.chan)
381 chan = wdev->wext.ibss.chandef.chan;
382 wdev_unlock(wdev);
383
384 if (chan) {
385 freq->m = chan->center_freq;
386 freq->e = 6;
387 return 0;
388 }
389
390
391 return -EINVAL;
392}
393
394int cfg80211_ibss_wext_siwessid(struct net_device *dev,
395 struct iw_request_info *info,
396 struct iw_point *data, char *ssid)
397{
398 struct wireless_dev *wdev = dev->ieee80211_ptr;
399 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
400 size_t len = data->length;
401 int err;
402
403
404 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
405 return -EINVAL;
406
407 if (!rdev->ops->join_ibss)
408 return -EOPNOTSUPP;
409
410 wdev_lock(wdev);
411 err = 0;
412 if (wdev->ssid_len)
413 err = __cfg80211_leave_ibss(rdev, dev, true);
414 wdev_unlock(wdev);
415
416 if (err)
417 return err;
418
419
420 if (len > 0 && ssid[len - 1] == '\0')
421 len--;
422
423 memcpy(wdev->ssid, ssid, len);
424 wdev->wext.ibss.ssid = wdev->ssid;
425 wdev->wext.ibss.ssid_len = len;
426
427 wdev_lock(wdev);
428 err = cfg80211_ibss_wext_join(rdev, wdev);
429 wdev_unlock(wdev);
430
431 return err;
432}
433
434int cfg80211_ibss_wext_giwessid(struct net_device *dev,
435 struct iw_request_info *info,
436 struct iw_point *data, char *ssid)
437{
438 struct wireless_dev *wdev = dev->ieee80211_ptr;
439
440
441 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
442 return -EINVAL;
443
444 data->flags = 0;
445
446 wdev_lock(wdev);
447 if (wdev->ssid_len) {
448 data->flags = 1;
449 data->length = wdev->ssid_len;
450 memcpy(ssid, wdev->ssid, data->length);
451 } else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
452 data->flags = 1;
453 data->length = wdev->wext.ibss.ssid_len;
454 memcpy(ssid, wdev->wext.ibss.ssid, data->length);
455 }
456 wdev_unlock(wdev);
457
458 return 0;
459}
460
461int cfg80211_ibss_wext_siwap(struct net_device *dev,
462 struct iw_request_info *info,
463 struct sockaddr *ap_addr, char *extra)
464{
465 struct wireless_dev *wdev = dev->ieee80211_ptr;
466 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
467 u8 *bssid = ap_addr->sa_data;
468 int err;
469
470
471 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
472 return -EINVAL;
473
474 if (!rdev->ops->join_ibss)
475 return -EOPNOTSUPP;
476
477 if (ap_addr->sa_family != ARPHRD_ETHER)
478 return -EINVAL;
479
480
481 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
482 bssid = NULL;
483
484 if (bssid && !is_valid_ether_addr(bssid))
485 return -EINVAL;
486
487
488 if (!bssid && !wdev->wext.ibss.bssid)
489 return 0;
490
491
492 if (wdev->wext.ibss.bssid && bssid &&
493 ether_addr_equal(bssid, wdev->wext.ibss.bssid))
494 return 0;
495
496 wdev_lock(wdev);
497 err = 0;
498 if (wdev->ssid_len)
499 err = __cfg80211_leave_ibss(rdev, dev, true);
500 wdev_unlock(wdev);
501
502 if (err)
503 return err;
504
505 if (bssid) {
506 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
507 wdev->wext.ibss.bssid = wdev->wext.bssid;
508 } else
509 wdev->wext.ibss.bssid = NULL;
510
511 wdev_lock(wdev);
512 err = cfg80211_ibss_wext_join(rdev, wdev);
513 wdev_unlock(wdev);
514
515 return err;
516}
517
518int cfg80211_ibss_wext_giwap(struct net_device *dev,
519 struct iw_request_info *info,
520 struct sockaddr *ap_addr, char *extra)
521{
522 struct wireless_dev *wdev = dev->ieee80211_ptr;
523
524
525 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
526 return -EINVAL;
527
528 ap_addr->sa_family = ARPHRD_ETHER;
529
530 wdev_lock(wdev);
531 if (wdev->current_bss)
532 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
533 else if (wdev->wext.ibss.bssid)
534 memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
535 else
536 eth_zero_addr(ap_addr->sa_data);
537
538 wdev_unlock(wdev);
539
540 return 0;
541}
542#endif
543
