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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) 2020-2023 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->u.ibss.ssid_len)
98 return -EALREADY;
99
100 if (!params->basic_rates) {
101 /*
102 * If no rates were explicitly configured,
103 * use the mandatory rate set for 11b or
104 * 11a for maximum compatibility.
105 */
106 struct ieee80211_supported_band *sband;
107 enum nl80211_band band;
108 u32 flag;
109 int j;
110
111 band = params->chandef.chan->band;
112 if (band == NL80211_BAND_5GHZ ||
113 band == NL80211_BAND_6GHZ)
114 flag = IEEE80211_RATE_MANDATORY_A;
115 else
116 flag = IEEE80211_RATE_MANDATORY_B;
117
118 sband = rdev->wiphy.bands[band];
119 for (j = 0; j < sband->n_bitrates; j++) {
120 if (sband->bitrates[j].flags & flag)
121 params->basic_rates |= BIT(j);
122 }
123 }
124
125 if (WARN_ON(connkeys && connkeys->def < 0))
126 return -EINVAL;
127
128 if (WARN_ON(wdev->connect_keys))
129 kfree_sensitive(wdev->connect_keys);
130 wdev->connect_keys = connkeys;
131
132 wdev->u.ibss.chandef = params->chandef;
133 if (connkeys) {
134 params->wep_keys = connkeys->params;
135 params->wep_tx_key = connkeys->def;
136 }
137
138#ifdef CONFIG_CFG80211_WEXT
139 wdev->wext.ibss.chandef = params->chandef;
140#endif
141 err = rdev_join_ibss(rdev, dev, params);
142 if (err) {
143 wdev->connect_keys = NULL;
144 return err;
145 }
146
147 memcpy(wdev->u.ibss.ssid, params->ssid, params->ssid_len);
148 wdev->u.ibss.ssid_len = params->ssid_len;
149
150 return 0;
151}
152
153void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
154{
155 struct wireless_dev *wdev = dev->ieee80211_ptr;
156 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
157 int i;
158
159 lockdep_assert_wiphy(wdev->wiphy);
160
161 kfree_sensitive(wdev->connect_keys);
162 wdev->connect_keys = NULL;
163
164 rdev_set_qos_map(rdev, dev, NULL);
165
166 /*
167 * Delete all the keys ... pairwise keys can't really
168 * exist any more anyway, but default keys might.
169 */
170 if (rdev->ops->del_key)
171 for (i = 0; i < 6; i++)
172 rdev_del_key(rdev, dev, -1, i, false, NULL);
173
174 if (wdev->u.ibss.current_bss) {
175 cfg80211_unhold_bss(wdev->u.ibss.current_bss);
176 cfg80211_put_bss(wdev->wiphy, &wdev->u.ibss.current_bss->pub);
177 }
178
179 wdev->u.ibss.current_bss = NULL;
180 wdev->u.ibss.ssid_len = 0;
181 memset(&wdev->u.ibss.chandef, 0, sizeof(wdev->u.ibss.chandef));
182#ifdef CONFIG_CFG80211_WEXT
183 if (!nowext)
184 wdev->wext.ibss.ssid_len = 0;
185#endif
186 cfg80211_sched_dfs_chan_update(rdev);
187}
188
189int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
190 struct net_device *dev, bool nowext)
191{
192 struct wireless_dev *wdev = dev->ieee80211_ptr;
193 int err;
194
195 lockdep_assert_wiphy(wdev->wiphy);
196
197 if (!wdev->u.ibss.ssid_len)
198 return -ENOLINK;
199
200 err = rdev_leave_ibss(rdev, dev);
201
202 if (err)
203 return err;
204
205 wdev->conn_owner_nlportid = 0;
206 cfg80211_clear_ibss(dev, nowext);
207
208 return 0;
209}
210
211#ifdef CONFIG_CFG80211_WEXT
212int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
213 struct wireless_dev *wdev)
214{
215 struct cfg80211_cached_keys *ck = NULL;
216 enum nl80211_band band;
217 int i, err;
218
219 lockdep_assert_wiphy(wdev->wiphy);
220
221 if (!wdev->wext.ibss.beacon_interval)
222 wdev->wext.ibss.beacon_interval = 100;
223
224 /* try to find an IBSS channel if none requested ... */
225 if (!wdev->wext.ibss.chandef.chan) {
226 struct ieee80211_channel *new_chan = NULL;
227
228 for (band = 0; band < NUM_NL80211_BANDS; band++) {
229 struct ieee80211_supported_band *sband;
230 struct ieee80211_channel *chan;
231
232 sband = rdev->wiphy.bands[band];
233 if (!sband)
234 continue;
235
236 for (i = 0; i < sband->n_channels; i++) {
237 chan = &sband->channels[i];
238 if (chan->flags & IEEE80211_CHAN_NO_IR)
239 continue;
240 if (chan->flags & IEEE80211_CHAN_DISABLED)
241 continue;
242 new_chan = chan;
243 break;
244 }
245
246 if (new_chan)
247 break;
248 }
249
250 if (!new_chan)
251 return -EINVAL;
252
253 cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
254 NL80211_CHAN_NO_HT);
255 }
256
257 /* don't join -- SSID is not there */
258 if (!wdev->wext.ibss.ssid_len)
259 return 0;
260
261 if (!netif_running(wdev->netdev))
262 return 0;
263
264 if (wdev->wext.keys)
265 wdev->wext.keys->def = wdev->wext.default_key;
266
267 wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
268
269 if (wdev->wext.keys && wdev->wext.keys->def != -1) {
270 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
271 if (!ck)
272 return -ENOMEM;
273 for (i = 0; i < 4; i++)
274 ck->params[i].key = ck->data[i];
275 }
276 err = __cfg80211_join_ibss(rdev, wdev->netdev,
277 &wdev->wext.ibss, ck);
278 if (err)
279 kfree(ck);
280
281 return err;
282}
283
284int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
285 struct iw_request_info *info,
286 struct iw_freq *wextfreq, char *extra)
287{
288 struct wireless_dev *wdev = dev->ieee80211_ptr;
289 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
290 struct ieee80211_channel *chan = NULL;
291 int err, freq;
292
293 /* call only for ibss! */
294 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
295 return -EINVAL;
296
297 if (!rdev->ops->join_ibss)
298 return -EOPNOTSUPP;
299
300 freq = cfg80211_wext_freq(wextfreq);
301 if (freq < 0)
302 return freq;
303
304 if (freq) {
305 chan = ieee80211_get_channel(wdev->wiphy, freq);
306 if (!chan)
307 return -EINVAL;
308 if (chan->flags & IEEE80211_CHAN_NO_IR ||
309 chan->flags & IEEE80211_CHAN_DISABLED)
310 return -EINVAL;
311 }
312
313 if (wdev->wext.ibss.chandef.chan == chan)
314 return 0;
315
316 err = 0;
317 if (wdev->u.ibss.ssid_len)
318 err = cfg80211_leave_ibss(rdev, dev, true);
319
320 if (err)
321 return err;
322
323 if (chan) {
324 cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
325 NL80211_CHAN_NO_HT);
326 wdev->wext.ibss.channel_fixed = true;
327 } else {
328 /* cfg80211_ibss_wext_join will pick one if needed */
329 wdev->wext.ibss.channel_fixed = false;
330 }
331
332 return cfg80211_ibss_wext_join(rdev, wdev);
333}
334
335int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
336 struct iw_request_info *info,
337 struct iw_freq *freq, char *extra)
338{
339 struct wireless_dev *wdev = dev->ieee80211_ptr;
340 struct ieee80211_channel *chan = NULL;
341
342 /* call only for ibss! */
343 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
344 return -EINVAL;
345
346 if (wdev->u.ibss.current_bss)
347 chan = wdev->u.ibss.current_bss->pub.channel;
348 else if (wdev->wext.ibss.chandef.chan)
349 chan = wdev->wext.ibss.chandef.chan;
350
351 if (chan) {
352 freq->m = chan->center_freq;
353 freq->e = 6;
354 return 0;
355 }
356
357 /* no channel if not joining */
358 return -EINVAL;
359}
360
361int cfg80211_ibss_wext_siwessid(struct net_device *dev,
362 struct iw_request_info *info,
363 struct iw_point *data, char *ssid)
364{
365 struct wireless_dev *wdev = dev->ieee80211_ptr;
366 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
367 size_t len = data->length;
368 int err;
369
370 /* call only for ibss! */
371 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
372 return -EINVAL;
373
374 if (!rdev->ops->join_ibss)
375 return -EOPNOTSUPP;
376
377 err = 0;
378 if (wdev->u.ibss.ssid_len)
379 err = cfg80211_leave_ibss(rdev, dev, true);
380
381 if (err)
382 return err;
383
384 /* iwconfig uses nul termination in SSID.. */
385 if (len > 0 && ssid[len - 1] == '\0')
386 len--;
387
388 memcpy(wdev->u.ibss.ssid, ssid, len);
389 wdev->wext.ibss.ssid = wdev->u.ibss.ssid;
390 wdev->wext.ibss.ssid_len = len;
391
392 return cfg80211_ibss_wext_join(rdev, wdev);
393}
394
395int cfg80211_ibss_wext_giwessid(struct net_device *dev,
396 struct iw_request_info *info,
397 struct iw_point *data, char *ssid)
398{
399 struct wireless_dev *wdev = dev->ieee80211_ptr;
400
401 /* call only for ibss! */
402 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
403 return -EINVAL;
404
405 data->flags = 0;
406
407 if (wdev->u.ibss.ssid_len) {
408 data->flags = 1;
409 data->length = wdev->u.ibss.ssid_len;
410 memcpy(ssid, wdev->u.ibss.ssid, data->length);
411 } else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
412 data->flags = 1;
413 data->length = wdev->wext.ibss.ssid_len;
414 memcpy(ssid, wdev->wext.ibss.ssid, data->length);
415 }
416
417 return 0;
418}
419
420int cfg80211_ibss_wext_siwap(struct net_device *dev,
421 struct iw_request_info *info,
422 struct sockaddr *ap_addr, char *extra)
423{
424 struct wireless_dev *wdev = dev->ieee80211_ptr;
425 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
426 u8 *bssid = ap_addr->sa_data;
427 int err;
428
429 /* call only for ibss! */
430 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
431 return -EINVAL;
432
433 if (!rdev->ops->join_ibss)
434 return -EOPNOTSUPP;
435
436 if (ap_addr->sa_family != ARPHRD_ETHER)
437 return -EINVAL;
438
439 /* automatic mode */
440 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
441 bssid = NULL;
442
443 if (bssid && !is_valid_ether_addr(bssid))
444 return -EINVAL;
445
446 /* both automatic */
447 if (!bssid && !wdev->wext.ibss.bssid)
448 return 0;
449
450 /* fixed already - and no change */
451 if (wdev->wext.ibss.bssid && bssid &&
452 ether_addr_equal(bssid, wdev->wext.ibss.bssid))
453 return 0;
454
455 err = 0;
456 if (wdev->u.ibss.ssid_len)
457 err = cfg80211_leave_ibss(rdev, dev, true);
458
459 if (err)
460 return err;
461
462 if (bssid) {
463 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
464 wdev->wext.ibss.bssid = wdev->wext.bssid;
465 } else
466 wdev->wext.ibss.bssid = NULL;
467
468 return cfg80211_ibss_wext_join(rdev, wdev);
469}
470
471int cfg80211_ibss_wext_giwap(struct net_device *dev,
472 struct iw_request_info *info,
473 struct sockaddr *ap_addr, char *extra)
474{
475 struct wireless_dev *wdev = dev->ieee80211_ptr;
476
477 /* call only for ibss! */
478 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
479 return -EINVAL;
480
481 ap_addr->sa_family = ARPHRD_ETHER;
482
483 if (wdev->u.ibss.current_bss)
484 memcpy(ap_addr->sa_data, wdev->u.ibss.current_bss->pub.bssid,
485 ETH_ALEN);
486 else if (wdev->wext.ibss.bssid)
487 memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
488 else
489 eth_zero_addr(ap_addr->sa_data);
490
491 return 0;
492}
493#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 <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 WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
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_dev(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_dev(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 struct ieee80211_channel *check_chan;
92 u8 radar_detect_width = 0;
93 int err;
94
95 ASSERT_WDEV_LOCK(wdev);
96
97 if (wdev->ssid_len)
98 return -EALREADY;
99
100 if (!params->basic_rates) {
101 /*
102 * If no rates were explicitly configured,
103 * use the mandatory rate set for 11b or
104 * 11a for maximum compatibility.
105 */
106 struct ieee80211_supported_band *sband =
107 rdev->wiphy.bands[params->chandef.chan->band];
108 int j;
109 u32 flag = params->chandef.chan->band == IEEE80211_BAND_5GHZ ?
110 IEEE80211_RATE_MANDATORY_A :
111 IEEE80211_RATE_MANDATORY_B;
112
113 for (j = 0; j < sband->n_bitrates; j++) {
114 if (sband->bitrates[j].flags & flag)
115 params->basic_rates |= BIT(j);
116 }
117 }
118
119 if (WARN_ON(wdev->connect_keys))
120 kfree(wdev->connect_keys);
121 wdev->connect_keys = connkeys;
122
123 wdev->ibss_fixed = params->channel_fixed;
124 wdev->ibss_dfs_possible = params->userspace_handles_dfs;
125 wdev->chandef = params->chandef;
126#ifdef CONFIG_CFG80211_WEXT
127 wdev->wext.ibss.chandef = params->chandef;
128#endif
129 check_chan = params->chandef.chan;
130 if (params->userspace_handles_dfs) {
131 /* Check for radar even if the current channel is not
132 * a radar channel - it might decide to change to DFS
133 * channel later.
134 */
135 radar_detect_width = BIT(params->chandef.width);
136 }
137
138 err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
139 check_chan,
140 (params->channel_fixed &&
141 !radar_detect_width)
142 ? CHAN_MODE_SHARED
143 : CHAN_MODE_EXCLUSIVE,
144 radar_detect_width);
145
146 if (err) {
147 wdev->connect_keys = NULL;
148 return err;
149 }
150
151 err = rdev_join_ibss(rdev, dev, params);
152 if (err) {
153 wdev->connect_keys = NULL;
154 return err;
155 }
156
157 memcpy(wdev->ssid, params->ssid, params->ssid_len);
158 wdev->ssid_len = params->ssid_len;
159
160 return 0;
161}
162
163int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
164 struct net_device *dev,
165 struct cfg80211_ibss_params *params,
166 struct cfg80211_cached_keys *connkeys)
167{
168 struct wireless_dev *wdev = dev->ieee80211_ptr;
169 int err;
170
171 ASSERT_RTNL();
172
173 wdev_lock(wdev);
174 err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
175 wdev_unlock(wdev);
176
177 return err;
178}
179
180static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
181{
182 struct wireless_dev *wdev = dev->ieee80211_ptr;
183 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
184 int i;
185
186 ASSERT_WDEV_LOCK(wdev);
187
188 kfree(wdev->connect_keys);
189 wdev->connect_keys = NULL;
190
191 rdev_set_qos_map(rdev, dev, NULL);
192
193 /*
194 * Delete all the keys ... pairwise keys can't really
195 * exist any more anyway, but default keys might.
196 */
197 if (rdev->ops->del_key)
198 for (i = 0; i < 6; i++)
199 rdev_del_key(rdev, dev, i, false, NULL);
200
201 if (wdev->current_bss) {
202 cfg80211_unhold_bss(wdev->current_bss);
203 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
204 }
205
206 wdev->current_bss = NULL;
207 wdev->ssid_len = 0;
208 memset(&wdev->chandef, 0, sizeof(wdev->chandef));
209#ifdef CONFIG_CFG80211_WEXT
210 if (!nowext)
211 wdev->wext.ibss.ssid_len = 0;
212#endif
213}
214
215void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
216{
217 struct wireless_dev *wdev = dev->ieee80211_ptr;
218
219 wdev_lock(wdev);
220 __cfg80211_clear_ibss(dev, nowext);
221 wdev_unlock(wdev);
222}
223
224int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
225 struct net_device *dev, bool nowext)
226{
227 struct wireless_dev *wdev = dev->ieee80211_ptr;
228 int err;
229
230 ASSERT_WDEV_LOCK(wdev);
231
232 if (!wdev->ssid_len)
233 return -ENOLINK;
234
235 err = rdev_leave_ibss(rdev, dev);
236
237 if (err)
238 return err;
239
240 __cfg80211_clear_ibss(dev, nowext);
241
242 return 0;
243}
244
245int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
246 struct net_device *dev, bool nowext)
247{
248 struct wireless_dev *wdev = dev->ieee80211_ptr;
249 int err;
250
251 wdev_lock(wdev);
252 err = __cfg80211_leave_ibss(rdev, dev, nowext);
253 wdev_unlock(wdev);
254
255 return err;
256}
257
258#ifdef CONFIG_CFG80211_WEXT
259int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
260 struct wireless_dev *wdev)
261{
262 struct cfg80211_cached_keys *ck = NULL;
263 enum ieee80211_band band;
264 int i, err;
265
266 ASSERT_WDEV_LOCK(wdev);
267
268 if (!wdev->wext.ibss.beacon_interval)
269 wdev->wext.ibss.beacon_interval = 100;
270
271 /* try to find an IBSS channel if none requested ... */
272 if (!wdev->wext.ibss.chandef.chan) {
273 struct ieee80211_channel *new_chan = NULL;
274
275 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
276 struct ieee80211_supported_band *sband;
277 struct ieee80211_channel *chan;
278
279 sband = rdev->wiphy.bands[band];
280 if (!sband)
281 continue;
282
283 for (i = 0; i < sband->n_channels; i++) {
284 chan = &sband->channels[i];
285 if (chan->flags & IEEE80211_CHAN_NO_IR)
286 continue;
287 if (chan->flags & IEEE80211_CHAN_DISABLED)
288 continue;
289 new_chan = chan;
290 break;
291 }
292
293 if (new_chan)
294 break;
295 }
296
297 if (!new_chan)
298 return -EINVAL;
299
300 cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
301 NL80211_CHAN_NO_HT);
302 }
303
304 /* don't join -- SSID is not there */
305 if (!wdev->wext.ibss.ssid_len)
306 return 0;
307
308 if (!netif_running(wdev->netdev))
309 return 0;
310
311 if (wdev->wext.keys) {
312 wdev->wext.keys->def = wdev->wext.default_key;
313 wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
314 }
315
316 wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
317
318 if (wdev->wext.keys) {
319 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
320 if (!ck)
321 return -ENOMEM;
322 for (i = 0; i < 6; i++)
323 ck->params[i].key = ck->data[i];
324 }
325 err = __cfg80211_join_ibss(rdev, wdev->netdev,
326 &wdev->wext.ibss, ck);
327 if (err)
328 kfree(ck);
329
330 return err;
331}
332
333int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
334 struct iw_request_info *info,
335 struct iw_freq *wextfreq, char *extra)
336{
337 struct wireless_dev *wdev = dev->ieee80211_ptr;
338 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
339 struct ieee80211_channel *chan = NULL;
340 int err, freq;
341
342 /* call only for ibss! */
343 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
344 return -EINVAL;
345
346 if (!rdev->ops->join_ibss)
347 return -EOPNOTSUPP;
348
349 freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
350 if (freq < 0)
351 return freq;
352
353 if (freq) {
354 chan = ieee80211_get_channel(wdev->wiphy, freq);
355 if (!chan)
356 return -EINVAL;
357 if (chan->flags & IEEE80211_CHAN_NO_IR ||
358 chan->flags & IEEE80211_CHAN_DISABLED)
359 return -EINVAL;
360 }
361
362 if (wdev->wext.ibss.chandef.chan == chan)
363 return 0;
364
365 wdev_lock(wdev);
366 err = 0;
367 if (wdev->ssid_len)
368 err = __cfg80211_leave_ibss(rdev, dev, true);
369 wdev_unlock(wdev);
370
371 if (err)
372 return err;
373
374 if (chan) {
375 cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
376 NL80211_CHAN_NO_HT);
377 wdev->wext.ibss.channel_fixed = true;
378 } else {
379 /* cfg80211_ibss_wext_join will pick one if needed */
380 wdev->wext.ibss.channel_fixed = false;
381 }
382
383 wdev_lock(wdev);
384 err = cfg80211_ibss_wext_join(rdev, wdev);
385 wdev_unlock(wdev);
386
387 return err;
388}
389
390int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
391 struct iw_request_info *info,
392 struct iw_freq *freq, char *extra)
393{
394 struct wireless_dev *wdev = dev->ieee80211_ptr;
395 struct ieee80211_channel *chan = NULL;
396
397 /* call only for ibss! */
398 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
399 return -EINVAL;
400
401 wdev_lock(wdev);
402 if (wdev->current_bss)
403 chan = wdev->current_bss->pub.channel;
404 else if (wdev->wext.ibss.chandef.chan)
405 chan = wdev->wext.ibss.chandef.chan;
406 wdev_unlock(wdev);
407
408 if (chan) {
409 freq->m = chan->center_freq;
410 freq->e = 6;
411 return 0;
412 }
413
414 /* no channel if not joining */
415 return -EINVAL;
416}
417
418int cfg80211_ibss_wext_siwessid(struct net_device *dev,
419 struct iw_request_info *info,
420 struct iw_point *data, char *ssid)
421{
422 struct wireless_dev *wdev = dev->ieee80211_ptr;
423 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
424 size_t len = data->length;
425 int err;
426
427 /* call only for ibss! */
428 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
429 return -EINVAL;
430
431 if (!rdev->ops->join_ibss)
432 return -EOPNOTSUPP;
433
434 wdev_lock(wdev);
435 err = 0;
436 if (wdev->ssid_len)
437 err = __cfg80211_leave_ibss(rdev, dev, true);
438 wdev_unlock(wdev);
439
440 if (err)
441 return err;
442
443 /* iwconfig uses nul termination in SSID.. */
444 if (len > 0 && ssid[len - 1] == '\0')
445 len--;
446
447 wdev->wext.ibss.ssid = wdev->ssid;
448 memcpy(wdev->wext.ibss.ssid, ssid, len);
449 wdev->wext.ibss.ssid_len = len;
450
451 wdev_lock(wdev);
452 err = cfg80211_ibss_wext_join(rdev, wdev);
453 wdev_unlock(wdev);
454
455 return err;
456}
457
458int cfg80211_ibss_wext_giwessid(struct net_device *dev,
459 struct iw_request_info *info,
460 struct iw_point *data, char *ssid)
461{
462 struct wireless_dev *wdev = dev->ieee80211_ptr;
463
464 /* call only for ibss! */
465 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
466 return -EINVAL;
467
468 data->flags = 0;
469
470 wdev_lock(wdev);
471 if (wdev->ssid_len) {
472 data->flags = 1;
473 data->length = wdev->ssid_len;
474 memcpy(ssid, wdev->ssid, data->length);
475 } else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
476 data->flags = 1;
477 data->length = wdev->wext.ibss.ssid_len;
478 memcpy(ssid, wdev->wext.ibss.ssid, data->length);
479 }
480 wdev_unlock(wdev);
481
482 return 0;
483}
484
485int cfg80211_ibss_wext_siwap(struct net_device *dev,
486 struct iw_request_info *info,
487 struct sockaddr *ap_addr, char *extra)
488{
489 struct wireless_dev *wdev = dev->ieee80211_ptr;
490 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
491 u8 *bssid = ap_addr->sa_data;
492 int err;
493
494 /* call only for ibss! */
495 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
496 return -EINVAL;
497
498 if (!rdev->ops->join_ibss)
499 return -EOPNOTSUPP;
500
501 if (ap_addr->sa_family != ARPHRD_ETHER)
502 return -EINVAL;
503
504 /* automatic mode */
505 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
506 bssid = NULL;
507
508 /* both automatic */
509 if (!bssid && !wdev->wext.ibss.bssid)
510 return 0;
511
512 /* fixed already - and no change */
513 if (wdev->wext.ibss.bssid && bssid &&
514 ether_addr_equal(bssid, wdev->wext.ibss.bssid))
515 return 0;
516
517 wdev_lock(wdev);
518 err = 0;
519 if (wdev->ssid_len)
520 err = __cfg80211_leave_ibss(rdev, dev, true);
521 wdev_unlock(wdev);
522
523 if (err)
524 return err;
525
526 if (bssid) {
527 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
528 wdev->wext.ibss.bssid = wdev->wext.bssid;
529 } else
530 wdev->wext.ibss.bssid = NULL;
531
532 wdev_lock(wdev);
533 err = cfg80211_ibss_wext_join(rdev, wdev);
534 wdev_unlock(wdev);
535
536 return err;
537}
538
539int cfg80211_ibss_wext_giwap(struct net_device *dev,
540 struct iw_request_info *info,
541 struct sockaddr *ap_addr, char *extra)
542{
543 struct wireless_dev *wdev = dev->ieee80211_ptr;
544
545 /* call only for ibss! */
546 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
547 return -EINVAL;
548
549 ap_addr->sa_family = ARPHRD_ETHER;
550
551 wdev_lock(wdev);
552 if (wdev->current_bss)
553 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
554 else if (wdev->wext.ibss.bssid)
555 memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
556 else
557 memset(ap_addr->sa_data, 0, ETH_ALEN);
558
559 wdev_unlock(wdev);
560
561 return 0;
562}
563#endif