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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Some IBSS support code for cfg80211.
4 *
5 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright (C) 2020-2024 Intel Corporation
7 */
8
9#include <linux/etherdevice.h>
10#include <linux/if_arp.h>
11#include <linux/slab.h>
12#include <linux/export.h>
13#include <net/cfg80211.h>
14#include "wext-compat.h"
15#include "nl80211.h"
16#include "rdev-ops.h"
17
18
19void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
20 struct ieee80211_channel *channel)
21{
22 struct wireless_dev *wdev = dev->ieee80211_ptr;
23 struct cfg80211_bss *bss;
24#ifdef CONFIG_CFG80211_WEXT
25 union iwreq_data wrqu;
26#endif
27
28 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
29 return;
30
31 if (!wdev->u.ibss.ssid_len)
32 return;
33
34 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
35 IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);
36
37 if (WARN_ON(!bss))
38 return;
39
40 if (wdev->u.ibss.current_bss) {
41 cfg80211_unhold_bss(wdev->u.ibss.current_bss);
42 cfg80211_put_bss(wdev->wiphy, &wdev->u.ibss.current_bss->pub);
43 }
44
45 cfg80211_hold_bss(bss_from_pub(bss));
46 wdev->u.ibss.current_bss = bss_from_pub(bss);
47
48 cfg80211_upload_connect_keys(wdev);
49
50 nl80211_send_ibss_bssid(wiphy_to_rdev(wdev->wiphy), dev, bssid,
51 GFP_KERNEL);
52#ifdef CONFIG_CFG80211_WEXT
53 memset(&wrqu, 0, sizeof(wrqu));
54 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
55 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
56#endif
57}
58
59void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
60 struct ieee80211_channel *channel, gfp_t gfp)
61{
62 struct wireless_dev *wdev = dev->ieee80211_ptr;
63 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
64 struct cfg80211_event *ev;
65 unsigned long flags;
66
67 trace_cfg80211_ibss_joined(dev, bssid, channel);
68
69 if (WARN_ON(!channel))
70 return;
71
72 ev = kzalloc(sizeof(*ev), gfp);
73 if (!ev)
74 return;
75
76 ev->type = EVENT_IBSS_JOINED;
77 memcpy(ev->ij.bssid, bssid, ETH_ALEN);
78 ev->ij.channel = channel;
79
80 spin_lock_irqsave(&wdev->event_lock, flags);
81 list_add_tail(&ev->list, &wdev->event_list);
82 spin_unlock_irqrestore(&wdev->event_lock, flags);
83 queue_work(cfg80211_wq, &rdev->event_work);
84}
85EXPORT_SYMBOL(cfg80211_ibss_joined);
86
87int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
88 struct net_device *dev,
89 struct cfg80211_ibss_params *params,
90 struct cfg80211_cached_keys *connkeys)
91{
92 struct wireless_dev *wdev = dev->ieee80211_ptr;
93 int err;
94
95 lockdep_assert_held(&rdev->wiphy.mtx);
96
97 if (wdev->links[0].cac_started)
98 return -EBUSY;
99
100 if (wdev->u.ibss.ssid_len)
101 return -EALREADY;
102
103 if (!params->basic_rates) {
104 /*
105 * If no rates were explicitly configured,
106 * use the mandatory rate set for 11b or
107 * 11a for maximum compatibility.
108 */
109 struct ieee80211_supported_band *sband;
110 enum nl80211_band band;
111 u32 flag;
112 int j;
113
114 band = params->chandef.chan->band;
115 if (band == NL80211_BAND_5GHZ ||
116 band == NL80211_BAND_6GHZ)
117 flag = IEEE80211_RATE_MANDATORY_A;
118 else
119 flag = IEEE80211_RATE_MANDATORY_B;
120
121 sband = rdev->wiphy.bands[band];
122 for (j = 0; j < sband->n_bitrates; j++) {
123 if (sband->bitrates[j].flags & flag)
124 params->basic_rates |= BIT(j);
125 }
126 }
127
128 if (WARN_ON(connkeys && connkeys->def < 0))
129 return -EINVAL;
130
131 if (WARN_ON(wdev->connect_keys))
132 kfree_sensitive(wdev->connect_keys);
133 wdev->connect_keys = connkeys;
134
135 wdev->u.ibss.chandef = params->chandef;
136 if (connkeys) {
137 params->wep_keys = connkeys->params;
138 params->wep_tx_key = connkeys->def;
139 }
140
141#ifdef CONFIG_CFG80211_WEXT
142 wdev->wext.ibss.chandef = params->chandef;
143#endif
144 err = rdev_join_ibss(rdev, dev, params);
145 if (err) {
146 wdev->connect_keys = NULL;
147 return err;
148 }
149
150 memcpy(wdev->u.ibss.ssid, params->ssid, params->ssid_len);
151 wdev->u.ibss.ssid_len = params->ssid_len;
152
153 return 0;
154}
155
156void 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 lockdep_assert_wiphy(wdev->wiphy);
163
164 kfree_sensitive(wdev->connect_keys);
165 wdev->connect_keys = NULL;
166
167 rdev_set_qos_map(rdev, dev, NULL);
168
169 /*
170 * Delete all the keys ... pairwise keys can't really
171 * exist any more anyway, but default keys might.
172 */
173 if (rdev->ops->del_key)
174 for (i = 0; i < 6; i++)
175 rdev_del_key(rdev, dev, -1, i, false, NULL);
176
177 if (wdev->u.ibss.current_bss) {
178 cfg80211_unhold_bss(wdev->u.ibss.current_bss);
179 cfg80211_put_bss(wdev->wiphy, &wdev->u.ibss.current_bss->pub);
180 }
181
182 wdev->u.ibss.current_bss = NULL;
183 wdev->u.ibss.ssid_len = 0;
184 memset(&wdev->u.ibss.chandef, 0, sizeof(wdev->u.ibss.chandef));
185#ifdef CONFIG_CFG80211_WEXT
186 if (!nowext)
187 wdev->wext.ibss.ssid_len = 0;
188#endif
189 cfg80211_sched_dfs_chan_update(rdev);
190}
191
192int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
193 struct net_device *dev, bool nowext)
194{
195 struct wireless_dev *wdev = dev->ieee80211_ptr;
196 int err;
197
198 lockdep_assert_wiphy(wdev->wiphy);
199
200 if (!wdev->u.ibss.ssid_len)
201 return -ENOLINK;
202
203 err = rdev_leave_ibss(rdev, dev);
204
205 if (err)
206 return err;
207
208 wdev->conn_owner_nlportid = 0;
209 cfg80211_clear_ibss(dev, nowext);
210
211 return 0;
212}
213
214#ifdef CONFIG_CFG80211_WEXT
215int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
216 struct wireless_dev *wdev)
217{
218 struct cfg80211_cached_keys *ck = NULL;
219 enum nl80211_band band;
220 int i, err;
221
222 lockdep_assert_wiphy(wdev->wiphy);
223
224 if (!wdev->wext.ibss.beacon_interval)
225 wdev->wext.ibss.beacon_interval = 100;
226
227 /* try to find an IBSS channel if none requested ... */
228 if (!wdev->wext.ibss.chandef.chan) {
229 struct ieee80211_channel *new_chan = NULL;
230
231 for (band = 0; band < NUM_NL80211_BANDS; band++) {
232 struct ieee80211_supported_band *sband;
233 struct ieee80211_channel *chan;
234
235 sband = rdev->wiphy.bands[band];
236 if (!sband)
237 continue;
238
239 for (i = 0; i < sband->n_channels; i++) {
240 chan = &sband->channels[i];
241 if (chan->flags & IEEE80211_CHAN_NO_IR)
242 continue;
243 if (chan->flags & IEEE80211_CHAN_DISABLED)
244 continue;
245 new_chan = chan;
246 break;
247 }
248
249 if (new_chan)
250 break;
251 }
252
253 if (!new_chan)
254 return -EINVAL;
255
256 cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
257 NL80211_CHAN_NO_HT);
258 }
259
260 /* don't join -- SSID is not there */
261 if (!wdev->wext.ibss.ssid_len)
262 return 0;
263
264 if (!netif_running(wdev->netdev))
265 return 0;
266
267 if (wdev->wext.keys)
268 wdev->wext.keys->def = wdev->wext.default_key;
269
270 wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
271
272 if (wdev->wext.keys && wdev->wext.keys->def != -1) {
273 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
274 if (!ck)
275 return -ENOMEM;
276 for (i = 0; i < 4; i++)
277 ck->params[i].key = ck->data[i];
278 }
279 err = __cfg80211_join_ibss(rdev, wdev->netdev,
280 &wdev->wext.ibss, ck);
281 if (err)
282 kfree(ck);
283
284 return err;
285}
286
287int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
288 struct iw_request_info *info,
289 struct iw_freq *wextfreq, char *extra)
290{
291 struct wireless_dev *wdev = dev->ieee80211_ptr;
292 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
293 struct ieee80211_channel *chan = NULL;
294 int err, freq;
295
296 /* call only for ibss! */
297 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
298 return -EINVAL;
299
300 if (!rdev->ops->join_ibss)
301 return -EOPNOTSUPP;
302
303 freq = cfg80211_wext_freq(wextfreq);
304 if (freq < 0)
305 return freq;
306
307 if (freq) {
308 chan = ieee80211_get_channel(wdev->wiphy, freq);
309 if (!chan)
310 return -EINVAL;
311 if (chan->flags & IEEE80211_CHAN_NO_IR ||
312 chan->flags & IEEE80211_CHAN_DISABLED)
313 return -EINVAL;
314 }
315
316 if (wdev->wext.ibss.chandef.chan == chan)
317 return 0;
318
319 err = 0;
320 if (wdev->u.ibss.ssid_len)
321 err = cfg80211_leave_ibss(rdev, dev, true);
322
323 if (err)
324 return err;
325
326 if (chan) {
327 cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
328 NL80211_CHAN_NO_HT);
329 wdev->wext.ibss.channel_fixed = true;
330 } else {
331 /* cfg80211_ibss_wext_join will pick one if needed */
332 wdev->wext.ibss.channel_fixed = false;
333 }
334
335 return cfg80211_ibss_wext_join(rdev, wdev);
336}
337
338int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
339 struct iw_request_info *info,
340 struct iw_freq *freq, char *extra)
341{
342 struct wireless_dev *wdev = dev->ieee80211_ptr;
343 struct ieee80211_channel *chan = NULL;
344
345 /* call only for ibss! */
346 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
347 return -EINVAL;
348
349 if (wdev->u.ibss.current_bss)
350 chan = wdev->u.ibss.current_bss->pub.channel;
351 else if (wdev->wext.ibss.chandef.chan)
352 chan = wdev->wext.ibss.chandef.chan;
353
354 if (chan) {
355 freq->m = chan->center_freq;
356 freq->e = 6;
357 return 0;
358 }
359
360 /* no channel if not joining */
361 return -EINVAL;
362}
363
364int cfg80211_ibss_wext_siwessid(struct net_device *dev,
365 struct iw_request_info *info,
366 struct iw_point *data, char *ssid)
367{
368 struct wireless_dev *wdev = dev->ieee80211_ptr;
369 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
370 size_t len = data->length;
371 int err;
372
373 /* call only for ibss! */
374 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
375 return -EINVAL;
376
377 if (!rdev->ops->join_ibss)
378 return -EOPNOTSUPP;
379
380 err = 0;
381 if (wdev->u.ibss.ssid_len)
382 err = cfg80211_leave_ibss(rdev, dev, true);
383
384 if (err)
385 return err;
386
387 /* iwconfig uses nul termination in SSID.. */
388 if (len > 0 && ssid[len - 1] == '\0')
389 len--;
390
391 memcpy(wdev->u.ibss.ssid, ssid, len);
392 wdev->wext.ibss.ssid = wdev->u.ibss.ssid;
393 wdev->wext.ibss.ssid_len = len;
394
395 return cfg80211_ibss_wext_join(rdev, wdev);
396}
397
398int cfg80211_ibss_wext_giwessid(struct net_device *dev,
399 struct iw_request_info *info,
400 struct iw_point *data, char *ssid)
401{
402 struct wireless_dev *wdev = dev->ieee80211_ptr;
403
404 /* call only for ibss! */
405 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
406 return -EINVAL;
407
408 data->flags = 0;
409
410 if (wdev->u.ibss.ssid_len) {
411 data->flags = 1;
412 data->length = wdev->u.ibss.ssid_len;
413 memcpy(ssid, wdev->u.ibss.ssid, data->length);
414 } else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
415 data->flags = 1;
416 data->length = wdev->wext.ibss.ssid_len;
417 memcpy(ssid, wdev->wext.ibss.ssid, data->length);
418 }
419
420 return 0;
421}
422
423int cfg80211_ibss_wext_siwap(struct net_device *dev,
424 struct iw_request_info *info,
425 struct sockaddr *ap_addr, char *extra)
426{
427 struct wireless_dev *wdev = dev->ieee80211_ptr;
428 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
429 u8 *bssid = ap_addr->sa_data;
430 int err;
431
432 /* call only for ibss! */
433 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
434 return -EINVAL;
435
436 if (!rdev->ops->join_ibss)
437 return -EOPNOTSUPP;
438
439 if (ap_addr->sa_family != ARPHRD_ETHER)
440 return -EINVAL;
441
442 /* automatic mode */
443 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
444 bssid = NULL;
445
446 if (bssid && !is_valid_ether_addr(bssid))
447 return -EINVAL;
448
449 /* both automatic */
450 if (!bssid && !wdev->wext.ibss.bssid)
451 return 0;
452
453 /* fixed already - and no change */
454 if (wdev->wext.ibss.bssid && bssid &&
455 ether_addr_equal(bssid, wdev->wext.ibss.bssid))
456 return 0;
457
458 err = 0;
459 if (wdev->u.ibss.ssid_len)
460 err = cfg80211_leave_ibss(rdev, dev, true);
461
462 if (err)
463 return err;
464
465 if (bssid) {
466 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
467 wdev->wext.ibss.bssid = wdev->wext.bssid;
468 } else
469 wdev->wext.ibss.bssid = NULL;
470
471 return cfg80211_ibss_wext_join(rdev, wdev);
472}
473
474int cfg80211_ibss_wext_giwap(struct net_device *dev,
475 struct iw_request_info *info,
476 struct sockaddr *ap_addr, char *extra)
477{
478 struct wireless_dev *wdev = dev->ieee80211_ptr;
479
480 /* call only for ibss! */
481 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
482 return -EINVAL;
483
484 ap_addr->sa_family = ARPHRD_ETHER;
485
486 if (wdev->u.ibss.current_bss)
487 memcpy(ap_addr->sa_data, wdev->u.ibss.current_bss->pub.bssid,
488 ETH_ALEN);
489 else if (wdev->wext.ibss.bssid)
490 memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
491 else
492 eth_zero_addr(ap_addr->sa_data);
493
494 return 0;
495}
496#endif
1/*
2 * Some IBSS support code for cfg80211.
3 *
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
5 */
6
7#include <linux/etherdevice.h>
8#include <linux/if_arp.h>
9#include <linux/slab.h>
10#include <net/cfg80211.h>
11#include "wext-compat.h"
12#include "nl80211.h"
13
14
15void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
16{
17 struct wireless_dev *wdev = dev->ieee80211_ptr;
18 struct cfg80211_bss *bss;
19#ifdef CONFIG_CFG80211_WEXT
20 union iwreq_data wrqu;
21#endif
22
23 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
24 return;
25
26 if (!wdev->ssid_len)
27 return;
28
29 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
30 wdev->ssid, wdev->ssid_len,
31 WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
32
33 if (WARN_ON(!bss))
34 return;
35
36 if (wdev->current_bss) {
37 cfg80211_unhold_bss(wdev->current_bss);
38 cfg80211_put_bss(&wdev->current_bss->pub);
39 }
40
41 cfg80211_hold_bss(bss_from_pub(bss));
42 wdev->current_bss = bss_from_pub(bss);
43
44 cfg80211_upload_connect_keys(wdev);
45
46 nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
47 GFP_KERNEL);
48#ifdef CONFIG_CFG80211_WEXT
49 memset(&wrqu, 0, sizeof(wrqu));
50 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
51 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
52#endif
53}
54
55void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
56{
57 struct wireless_dev *wdev = dev->ieee80211_ptr;
58 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
59 struct cfg80211_event *ev;
60 unsigned long flags;
61
62 CFG80211_DEV_WARN_ON(!wdev->ssid_len);
63
64 ev = kzalloc(sizeof(*ev), gfp);
65 if (!ev)
66 return;
67
68 ev->type = EVENT_IBSS_JOINED;
69 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
70
71 spin_lock_irqsave(&wdev->event_lock, flags);
72 list_add_tail(&ev->list, &wdev->event_list);
73 spin_unlock_irqrestore(&wdev->event_lock, flags);
74 queue_work(cfg80211_wq, &rdev->event_work);
75}
76EXPORT_SYMBOL(cfg80211_ibss_joined);
77
78int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
79 struct net_device *dev,
80 struct cfg80211_ibss_params *params,
81 struct cfg80211_cached_keys *connkeys)
82{
83 struct wireless_dev *wdev = dev->ieee80211_ptr;
84 int err;
85
86 ASSERT_WDEV_LOCK(wdev);
87
88 if (wdev->ssid_len)
89 return -EALREADY;
90
91 if (!params->basic_rates) {
92 /*
93 * If no rates were explicitly configured,
94 * use the mandatory rate set for 11b or
95 * 11a for maximum compatibility.
96 */
97 struct ieee80211_supported_band *sband =
98 rdev->wiphy.bands[params->channel->band];
99 int j;
100 u32 flag = params->channel->band == IEEE80211_BAND_5GHZ ?
101 IEEE80211_RATE_MANDATORY_A :
102 IEEE80211_RATE_MANDATORY_B;
103
104 for (j = 0; j < sband->n_bitrates; j++) {
105 if (sband->bitrates[j].flags & flag)
106 params->basic_rates |= BIT(j);
107 }
108 }
109
110 if (WARN_ON(wdev->connect_keys))
111 kfree(wdev->connect_keys);
112 wdev->connect_keys = connkeys;
113
114#ifdef CONFIG_CFG80211_WEXT
115 wdev->wext.ibss.channel = params->channel;
116#endif
117 err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
118 if (err) {
119 wdev->connect_keys = NULL;
120 return err;
121 }
122
123 memcpy(wdev->ssid, params->ssid, params->ssid_len);
124 wdev->ssid_len = params->ssid_len;
125
126 return 0;
127}
128
129int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
130 struct net_device *dev,
131 struct cfg80211_ibss_params *params,
132 struct cfg80211_cached_keys *connkeys)
133{
134 struct wireless_dev *wdev = dev->ieee80211_ptr;
135 int err;
136
137 mutex_lock(&rdev->devlist_mtx);
138 wdev_lock(wdev);
139 err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
140 wdev_unlock(wdev);
141 mutex_unlock(&rdev->devlist_mtx);
142
143 return err;
144}
145
146static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
147{
148 struct wireless_dev *wdev = dev->ieee80211_ptr;
149 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
150 int i;
151
152 ASSERT_WDEV_LOCK(wdev);
153
154 kfree(wdev->connect_keys);
155 wdev->connect_keys = NULL;
156
157 /*
158 * Delete all the keys ... pairwise keys can't really
159 * exist any more anyway, but default keys might.
160 */
161 if (rdev->ops->del_key)
162 for (i = 0; i < 6; i++)
163 rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
164
165 if (wdev->current_bss) {
166 cfg80211_unhold_bss(wdev->current_bss);
167 cfg80211_put_bss(&wdev->current_bss->pub);
168 }
169
170 wdev->current_bss = NULL;
171 wdev->ssid_len = 0;
172#ifdef CONFIG_CFG80211_WEXT
173 if (!nowext)
174 wdev->wext.ibss.ssid_len = 0;
175#endif
176}
177
178void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
179{
180 struct wireless_dev *wdev = dev->ieee80211_ptr;
181
182 wdev_lock(wdev);
183 __cfg80211_clear_ibss(dev, nowext);
184 wdev_unlock(wdev);
185}
186
187int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
188 struct net_device *dev, bool nowext)
189{
190 struct wireless_dev *wdev = dev->ieee80211_ptr;
191 int err;
192
193 ASSERT_WDEV_LOCK(wdev);
194
195 if (!wdev->ssid_len)
196 return -ENOLINK;
197
198 err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
199
200 if (err)
201 return err;
202
203 __cfg80211_clear_ibss(dev, nowext);
204
205 return 0;
206}
207
208int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
209 struct net_device *dev, bool nowext)
210{
211 struct wireless_dev *wdev = dev->ieee80211_ptr;
212 int err;
213
214 wdev_lock(wdev);
215 err = __cfg80211_leave_ibss(rdev, dev, nowext);
216 wdev_unlock(wdev);
217
218 return err;
219}
220
221#ifdef CONFIG_CFG80211_WEXT
222int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
223 struct wireless_dev *wdev)
224{
225 struct cfg80211_cached_keys *ck = NULL;
226 enum ieee80211_band band;
227 int i, err;
228
229 ASSERT_WDEV_LOCK(wdev);
230
231 if (!wdev->wext.ibss.beacon_interval)
232 wdev->wext.ibss.beacon_interval = 100;
233
234 /* try to find an IBSS channel if none requested ... */
235 if (!wdev->wext.ibss.channel) {
236 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
237 struct ieee80211_supported_band *sband;
238 struct ieee80211_channel *chan;
239
240 sband = rdev->wiphy.bands[band];
241 if (!sband)
242 continue;
243
244 for (i = 0; i < sband->n_channels; i++) {
245 chan = &sband->channels[i];
246 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
247 continue;
248 if (chan->flags & IEEE80211_CHAN_DISABLED)
249 continue;
250 wdev->wext.ibss.channel = chan;
251 break;
252 }
253
254 if (wdev->wext.ibss.channel)
255 break;
256 }
257
258 if (!wdev->wext.ibss.channel)
259 return -EINVAL;
260 }
261
262 /* don't join -- SSID is not there */
263 if (!wdev->wext.ibss.ssid_len)
264 return 0;
265
266 if (!netif_running(wdev->netdev))
267 return 0;
268
269 if (wdev->wext.keys) {
270 wdev->wext.keys->def = wdev->wext.default_key;
271 wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
272 }
273
274 wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
275
276 if (wdev->wext.keys) {
277 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
278 if (!ck)
279 return -ENOMEM;
280 for (i = 0; i < 6; i++)
281 ck->params[i].key = ck->data[i];
282 }
283 err = __cfg80211_join_ibss(rdev, wdev->netdev,
284 &wdev->wext.ibss, ck);
285 if (err)
286 kfree(ck);
287
288 return err;
289}
290
291int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
292 struct iw_request_info *info,
293 struct iw_freq *wextfreq, char *extra)
294{
295 struct wireless_dev *wdev = dev->ieee80211_ptr;
296 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
297 struct ieee80211_channel *chan = NULL;
298 int err, freq;
299
300 /* call only for ibss! */
301 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
302 return -EINVAL;
303
304 if (!rdev->ops->join_ibss)
305 return -EOPNOTSUPP;
306
307 freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
308 if (freq < 0)
309 return freq;
310
311 if (freq) {
312 chan = ieee80211_get_channel(wdev->wiphy, freq);
313 if (!chan)
314 return -EINVAL;
315 if (chan->flags & IEEE80211_CHAN_NO_IBSS ||
316 chan->flags & IEEE80211_CHAN_DISABLED)
317 return -EINVAL;
318 }
319
320 if (wdev->wext.ibss.channel == chan)
321 return 0;
322
323 wdev_lock(wdev);
324 err = 0;
325 if (wdev->ssid_len)
326 err = __cfg80211_leave_ibss(rdev, dev, true);
327 wdev_unlock(wdev);
328
329 if (err)
330 return err;
331
332 if (chan) {
333 wdev->wext.ibss.channel = chan;
334 wdev->wext.ibss.channel_fixed = true;
335 } else {
336 /* cfg80211_ibss_wext_join will pick one if needed */
337 wdev->wext.ibss.channel_fixed = false;
338 }
339
340 mutex_lock(&rdev->devlist_mtx);
341 wdev_lock(wdev);
342 err = cfg80211_ibss_wext_join(rdev, wdev);
343 wdev_unlock(wdev);
344 mutex_unlock(&rdev->devlist_mtx);
345
346 return err;
347}
348
349int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
350 struct iw_request_info *info,
351 struct iw_freq *freq, char *extra)
352{
353 struct wireless_dev *wdev = dev->ieee80211_ptr;
354 struct ieee80211_channel *chan = NULL;
355
356 /* call only for ibss! */
357 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
358 return -EINVAL;
359
360 wdev_lock(wdev);
361 if (wdev->current_bss)
362 chan = wdev->current_bss->pub.channel;
363 else if (wdev->wext.ibss.channel)
364 chan = wdev->wext.ibss.channel;
365 wdev_unlock(wdev);
366
367 if (chan) {
368 freq->m = chan->center_freq;
369 freq->e = 6;
370 return 0;
371 }
372
373 /* no channel if not joining */
374 return -EINVAL;
375}
376
377int cfg80211_ibss_wext_siwessid(struct net_device *dev,
378 struct iw_request_info *info,
379 struct iw_point *data, char *ssid)
380{
381 struct wireless_dev *wdev = dev->ieee80211_ptr;
382 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
383 size_t len = data->length;
384 int err;
385
386 /* call only for ibss! */
387 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
388 return -EINVAL;
389
390 if (!rdev->ops->join_ibss)
391 return -EOPNOTSUPP;
392
393 wdev_lock(wdev);
394 err = 0;
395 if (wdev->ssid_len)
396 err = __cfg80211_leave_ibss(rdev, dev, true);
397 wdev_unlock(wdev);
398
399 if (err)
400 return err;
401
402 /* iwconfig uses nul termination in SSID.. */
403 if (len > 0 && ssid[len - 1] == '\0')
404 len--;
405
406 wdev->wext.ibss.ssid = wdev->ssid;
407 memcpy(wdev->wext.ibss.ssid, ssid, len);
408 wdev->wext.ibss.ssid_len = len;
409
410 mutex_lock(&rdev->devlist_mtx);
411 wdev_lock(wdev);
412 err = cfg80211_ibss_wext_join(rdev, wdev);
413 wdev_unlock(wdev);
414 mutex_unlock(&rdev->devlist_mtx);
415
416 return err;
417}
418
419int cfg80211_ibss_wext_giwessid(struct net_device *dev,
420 struct iw_request_info *info,
421 struct iw_point *data, char *ssid)
422{
423 struct wireless_dev *wdev = dev->ieee80211_ptr;
424
425 /* call only for ibss! */
426 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
427 return -EINVAL;
428
429 data->flags = 0;
430
431 wdev_lock(wdev);
432 if (wdev->ssid_len) {
433 data->flags = 1;
434 data->length = wdev->ssid_len;
435 memcpy(ssid, wdev->ssid, data->length);
436 } else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
437 data->flags = 1;
438 data->length = wdev->wext.ibss.ssid_len;
439 memcpy(ssid, wdev->wext.ibss.ssid, data->length);
440 }
441 wdev_unlock(wdev);
442
443 return 0;
444}
445
446int cfg80211_ibss_wext_siwap(struct net_device *dev,
447 struct iw_request_info *info,
448 struct sockaddr *ap_addr, char *extra)
449{
450 struct wireless_dev *wdev = dev->ieee80211_ptr;
451 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
452 u8 *bssid = ap_addr->sa_data;
453 int err;
454
455 /* call only for ibss! */
456 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
457 return -EINVAL;
458
459 if (!rdev->ops->join_ibss)
460 return -EOPNOTSUPP;
461
462 if (ap_addr->sa_family != ARPHRD_ETHER)
463 return -EINVAL;
464
465 /* automatic mode */
466 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
467 bssid = NULL;
468
469 /* both automatic */
470 if (!bssid && !wdev->wext.ibss.bssid)
471 return 0;
472
473 /* fixed already - and no change */
474 if (wdev->wext.ibss.bssid && bssid &&
475 compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
476 return 0;
477
478 wdev_lock(wdev);
479 err = 0;
480 if (wdev->ssid_len)
481 err = __cfg80211_leave_ibss(rdev, dev, true);
482 wdev_unlock(wdev);
483
484 if (err)
485 return err;
486
487 if (bssid) {
488 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
489 wdev->wext.ibss.bssid = wdev->wext.bssid;
490 } else
491 wdev->wext.ibss.bssid = NULL;
492
493 mutex_lock(&rdev->devlist_mtx);
494 wdev_lock(wdev);
495 err = cfg80211_ibss_wext_join(rdev, wdev);
496 wdev_unlock(wdev);
497 mutex_unlock(&rdev->devlist_mtx);
498
499 return err;
500}
501
502int cfg80211_ibss_wext_giwap(struct net_device *dev,
503 struct iw_request_info *info,
504 struct sockaddr *ap_addr, char *extra)
505{
506 struct wireless_dev *wdev = dev->ieee80211_ptr;
507
508 /* call only for ibss! */
509 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
510 return -EINVAL;
511
512 ap_addr->sa_family = ARPHRD_ETHER;
513
514 wdev_lock(wdev);
515 if (wdev->current_bss)
516 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
517 else if (wdev->wext.ibss.bssid)
518 memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
519 else
520 memset(ap_addr->sa_data, 0, ETH_ALEN);
521
522 wdev_unlock(wdev);
523
524 return 0;
525}
526#endif