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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
59bbb6f7 JB |
2 | /* |
3 | * This file contains helper code to handle channel | |
4 | * settings and keeping track of what is possible at | |
5 | * any point in time. | |
6 | * | |
7 | * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> | |
2740f0cf | 8 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
59bbb6f7 JB |
9 | */ |
10 | ||
54858ee5 | 11 | #include <linux/export.h> |
59bbb6f7 JB |
12 | #include <net/cfg80211.h> |
13 | #include "core.h" | |
e35e4d28 | 14 | #include "rdev-ops.h" |
59bbb6f7 | 15 | |
3d9d1d66 JB |
16 | void cfg80211_chandef_create(struct cfg80211_chan_def *chandef, |
17 | struct ieee80211_channel *chan, | |
18 | enum nl80211_channel_type chan_type) | |
9236d838 | 19 | { |
3d9d1d66 JB |
20 | if (WARN_ON(!chan)) |
21 | return; | |
9236d838 | 22 | |
3d9d1d66 JB |
23 | chandef->chan = chan; |
24 | chandef->center_freq2 = 0; | |
4ee3e063 | 25 | |
3d9d1d66 JB |
26 | switch (chan_type) { |
27 | case NL80211_CHAN_NO_HT: | |
28 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
29 | chandef->center_freq1 = chan->center_freq; | |
30 | break; | |
31 | case NL80211_CHAN_HT20: | |
32 | chandef->width = NL80211_CHAN_WIDTH_20; | |
33 | chandef->center_freq1 = chan->center_freq; | |
34 | break; | |
9236d838 | 35 | case NL80211_CHAN_HT40PLUS: |
3d9d1d66 JB |
36 | chandef->width = NL80211_CHAN_WIDTH_40; |
37 | chandef->center_freq1 = chan->center_freq + 10; | |
09a02fdb | 38 | break; |
9236d838 | 39 | case NL80211_CHAN_HT40MINUS: |
3d9d1d66 JB |
40 | chandef->width = NL80211_CHAN_WIDTH_40; |
41 | chandef->center_freq1 = chan->center_freq - 10; | |
09a02fdb | 42 | break; |
9236d838 | 43 | default: |
3d9d1d66 JB |
44 | WARN_ON(1); |
45 | } | |
46 | } | |
47 | EXPORT_SYMBOL(cfg80211_chandef_create); | |
48 | ||
9f5e8f6e | 49 | bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) |
3d9d1d66 JB |
50 | { |
51 | u32 control_freq; | |
52 | ||
53 | if (!chandef->chan) | |
54 | return false; | |
55 | ||
56 | control_freq = chandef->chan->center_freq; | |
57 | ||
58 | switch (chandef->width) { | |
2f301ab2 SW |
59 | case NL80211_CHAN_WIDTH_5: |
60 | case NL80211_CHAN_WIDTH_10: | |
3d9d1d66 JB |
61 | case NL80211_CHAN_WIDTH_20: |
62 | case NL80211_CHAN_WIDTH_20_NOHT: | |
63 | if (chandef->center_freq1 != control_freq) | |
64 | return false; | |
65 | if (chandef->center_freq2) | |
66 | return false; | |
67 | break; | |
68 | case NL80211_CHAN_WIDTH_40: | |
69 | if (chandef->center_freq1 != control_freq + 10 && | |
70 | chandef->center_freq1 != control_freq - 10) | |
71 | return false; | |
72 | if (chandef->center_freq2) | |
73 | return false; | |
74 | break; | |
75 | case NL80211_CHAN_WIDTH_80P80: | |
76 | if (chandef->center_freq1 != control_freq + 30 && | |
77 | chandef->center_freq1 != control_freq + 10 && | |
78 | chandef->center_freq1 != control_freq - 10 && | |
79 | chandef->center_freq1 != control_freq - 30) | |
80 | return false; | |
81 | if (!chandef->center_freq2) | |
82 | return false; | |
9cab3151 JB |
83 | /* adjacent is not allowed -- that's a 160 MHz channel */ |
84 | if (chandef->center_freq1 - chandef->center_freq2 == 80 || | |
85 | chandef->center_freq2 - chandef->center_freq1 == 80) | |
86 | return false; | |
3d9d1d66 JB |
87 | break; |
88 | case NL80211_CHAN_WIDTH_80: | |
89 | if (chandef->center_freq1 != control_freq + 30 && | |
90 | chandef->center_freq1 != control_freq + 10 && | |
91 | chandef->center_freq1 != control_freq - 10 && | |
92 | chandef->center_freq1 != control_freq - 30) | |
93 | return false; | |
94 | if (chandef->center_freq2) | |
95 | return false; | |
96 | break; | |
97 | case NL80211_CHAN_WIDTH_160: | |
98 | if (chandef->center_freq1 != control_freq + 70 && | |
99 | chandef->center_freq1 != control_freq + 50 && | |
100 | chandef->center_freq1 != control_freq + 30 && | |
101 | chandef->center_freq1 != control_freq + 10 && | |
102 | chandef->center_freq1 != control_freq - 10 && | |
103 | chandef->center_freq1 != control_freq - 30 && | |
104 | chandef->center_freq1 != control_freq - 50 && | |
105 | chandef->center_freq1 != control_freq - 70) | |
106 | return false; | |
107 | if (chandef->center_freq2) | |
108 | return false; | |
109 | break; | |
110 | default: | |
111 | return false; | |
112 | } | |
113 | ||
114 | return true; | |
115 | } | |
9f5e8f6e | 116 | EXPORT_SYMBOL(cfg80211_chandef_valid); |
3d9d1d66 JB |
117 | |
118 | static void chandef_primary_freqs(const struct cfg80211_chan_def *c, | |
fc1f48ff | 119 | u32 *pri40, u32 *pri80) |
3d9d1d66 JB |
120 | { |
121 | int tmp; | |
122 | ||
123 | switch (c->width) { | |
124 | case NL80211_CHAN_WIDTH_40: | |
125 | *pri40 = c->center_freq1; | |
126 | *pri80 = 0; | |
127 | break; | |
128 | case NL80211_CHAN_WIDTH_80: | |
129 | case NL80211_CHAN_WIDTH_80P80: | |
130 | *pri80 = c->center_freq1; | |
131 | /* n_P20 */ | |
132 | tmp = (30 + c->chan->center_freq - c->center_freq1)/20; | |
133 | /* n_P40 */ | |
134 | tmp /= 2; | |
135 | /* freq_P40 */ | |
136 | *pri40 = c->center_freq1 - 20 + 40 * tmp; | |
137 | break; | |
138 | case NL80211_CHAN_WIDTH_160: | |
139 | /* n_P20 */ | |
140 | tmp = (70 + c->chan->center_freq - c->center_freq1)/20; | |
141 | /* n_P40 */ | |
142 | tmp /= 2; | |
143 | /* freq_P40 */ | |
144 | *pri40 = c->center_freq1 - 60 + 40 * tmp; | |
145 | /* n_P80 */ | |
146 | tmp /= 2; | |
147 | *pri80 = c->center_freq1 - 40 + 80 * tmp; | |
148 | break; | |
149 | default: | |
150 | WARN_ON_ONCE(1); | |
151 | } | |
152 | } | |
153 | ||
04f39047 SW |
154 | static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) |
155 | { | |
156 | int width; | |
157 | ||
158 | switch (c->width) { | |
2f301ab2 SW |
159 | case NL80211_CHAN_WIDTH_5: |
160 | width = 5; | |
161 | break; | |
162 | case NL80211_CHAN_WIDTH_10: | |
163 | width = 10; | |
164 | break; | |
04f39047 SW |
165 | case NL80211_CHAN_WIDTH_20: |
166 | case NL80211_CHAN_WIDTH_20_NOHT: | |
167 | width = 20; | |
168 | break; | |
169 | case NL80211_CHAN_WIDTH_40: | |
170 | width = 40; | |
171 | break; | |
172 | case NL80211_CHAN_WIDTH_80P80: | |
173 | case NL80211_CHAN_WIDTH_80: | |
174 | width = 80; | |
175 | break; | |
176 | case NL80211_CHAN_WIDTH_160: | |
177 | width = 160; | |
178 | break; | |
179 | default: | |
180 | WARN_ON_ONCE(1); | |
181 | return -1; | |
182 | } | |
183 | return width; | |
184 | } | |
185 | ||
3d9d1d66 JB |
186 | const struct cfg80211_chan_def * |
187 | cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
188 | const struct cfg80211_chan_def *c2) | |
189 | { | |
190 | u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80; | |
191 | ||
192 | /* If they are identical, return */ | |
193 | if (cfg80211_chandef_identical(c1, c2)) | |
194 | return c1; | |
195 | ||
196 | /* otherwise, must have same control channel */ | |
197 | if (c1->chan != c2->chan) | |
198 | return NULL; | |
199 | ||
200 | /* | |
201 | * If they have the same width, but aren't identical, | |
202 | * then they can't be compatible. | |
203 | */ | |
204 | if (c1->width == c2->width) | |
205 | return NULL; | |
206 | ||
2f301ab2 SW |
207 | /* |
208 | * can't be compatible if one of them is 5 or 10 MHz, | |
209 | * but they don't have the same width. | |
210 | */ | |
211 | if (c1->width == NL80211_CHAN_WIDTH_5 || | |
212 | c1->width == NL80211_CHAN_WIDTH_10 || | |
213 | c2->width == NL80211_CHAN_WIDTH_5 || | |
214 | c2->width == NL80211_CHAN_WIDTH_10) | |
215 | return NULL; | |
216 | ||
3d9d1d66 JB |
217 | if (c1->width == NL80211_CHAN_WIDTH_20_NOHT || |
218 | c1->width == NL80211_CHAN_WIDTH_20) | |
219 | return c2; | |
220 | ||
221 | if (c2->width == NL80211_CHAN_WIDTH_20_NOHT || | |
222 | c2->width == NL80211_CHAN_WIDTH_20) | |
223 | return c1; | |
224 | ||
225 | chandef_primary_freqs(c1, &c1_pri40, &c1_pri80); | |
226 | chandef_primary_freqs(c2, &c2_pri40, &c2_pri80); | |
227 | ||
228 | if (c1_pri40 != c2_pri40) | |
229 | return NULL; | |
230 | ||
231 | WARN_ON(!c1_pri80 && !c2_pri80); | |
232 | if (c1_pri80 && c2_pri80 && c1_pri80 != c2_pri80) | |
233 | return NULL; | |
234 | ||
235 | if (c1->width > c2->width) | |
236 | return c1; | |
237 | return c2; | |
238 | } | |
239 | EXPORT_SYMBOL(cfg80211_chandef_compatible); | |
240 | ||
04f39047 SW |
241 | static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, |
242 | u32 bandwidth, | |
243 | enum nl80211_dfs_state dfs_state) | |
244 | { | |
245 | struct ieee80211_channel *c; | |
246 | u32 freq; | |
247 | ||
248 | for (freq = center_freq - bandwidth/2 + 10; | |
249 | freq <= center_freq + bandwidth/2 - 10; | |
250 | freq += 20) { | |
251 | c = ieee80211_get_channel(wiphy, freq); | |
252 | if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) | |
253 | continue; | |
254 | ||
255 | c->dfs_state = dfs_state; | |
256 | c->dfs_state_entered = jiffies; | |
257 | } | |
258 | } | |
259 | ||
260 | void cfg80211_set_dfs_state(struct wiphy *wiphy, | |
261 | const struct cfg80211_chan_def *chandef, | |
262 | enum nl80211_dfs_state dfs_state) | |
263 | { | |
264 | int width; | |
265 | ||
266 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
267 | return; | |
268 | ||
269 | width = cfg80211_chandef_get_width(chandef); | |
270 | if (width < 0) | |
271 | return; | |
272 | ||
273 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, | |
274 | width, dfs_state); | |
275 | ||
276 | if (!chandef->center_freq2) | |
277 | return; | |
278 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, | |
279 | width, dfs_state); | |
280 | } | |
281 | ||
40d1ba63 JD |
282 | static u32 cfg80211_get_start_freq(u32 center_freq, |
283 | u32 bandwidth) | |
284 | { | |
285 | u32 start_freq; | |
286 | ||
287 | if (bandwidth <= 20) | |
288 | start_freq = center_freq; | |
289 | else | |
290 | start_freq = center_freq - bandwidth/2 + 10; | |
291 | ||
292 | return start_freq; | |
293 | } | |
294 | ||
295 | static u32 cfg80211_get_end_freq(u32 center_freq, | |
296 | u32 bandwidth) | |
297 | { | |
298 | u32 end_freq; | |
299 | ||
300 | if (bandwidth <= 20) | |
301 | end_freq = center_freq; | |
302 | else | |
303 | end_freq = center_freq + bandwidth/2 - 10; | |
304 | ||
305 | return end_freq; | |
306 | } | |
307 | ||
04f39047 SW |
308 | static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, |
309 | u32 center_freq, | |
310 | u32 bandwidth) | |
311 | { | |
312 | struct ieee80211_channel *c; | |
2f301ab2 SW |
313 | u32 freq, start_freq, end_freq; |
314 | ||
40d1ba63 JD |
315 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
316 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
04f39047 | 317 | |
2f301ab2 | 318 | for (freq = start_freq; freq <= end_freq; freq += 20) { |
04f39047 SW |
319 | c = ieee80211_get_channel(wiphy, freq); |
320 | if (!c) | |
321 | return -EINVAL; | |
322 | ||
323 | if (c->flags & IEEE80211_CHAN_RADAR) | |
324 | return 1; | |
325 | } | |
326 | return 0; | |
327 | } | |
328 | ||
329 | ||
330 | int cfg80211_chandef_dfs_required(struct wiphy *wiphy, | |
2beb6dab LC |
331 | const struct cfg80211_chan_def *chandef, |
332 | enum nl80211_iftype iftype) | |
04f39047 SW |
333 | { |
334 | int width; | |
2beb6dab | 335 | int ret; |
04f39047 SW |
336 | |
337 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
338 | return -EINVAL; | |
339 | ||
2beb6dab LC |
340 | switch (iftype) { |
341 | case NL80211_IFTYPE_ADHOC: | |
342 | case NL80211_IFTYPE_AP: | |
343 | case NL80211_IFTYPE_P2P_GO: | |
344 | case NL80211_IFTYPE_MESH_POINT: | |
345 | width = cfg80211_chandef_get_width(chandef); | |
346 | if (width < 0) | |
347 | return -EINVAL; | |
04f39047 | 348 | |
2beb6dab LC |
349 | ret = cfg80211_get_chans_dfs_required(wiphy, |
350 | chandef->center_freq1, | |
351 | width); | |
352 | if (ret < 0) | |
353 | return ret; | |
354 | else if (ret > 0) | |
355 | return BIT(chandef->width); | |
04f39047 | 356 | |
2beb6dab LC |
357 | if (!chandef->center_freq2) |
358 | return 0; | |
359 | ||
360 | ret = cfg80211_get_chans_dfs_required(wiphy, | |
361 | chandef->center_freq2, | |
362 | width); | |
363 | if (ret < 0) | |
364 | return ret; | |
365 | else if (ret > 0) | |
366 | return BIT(chandef->width); | |
04f39047 | 367 | |
2beb6dab LC |
368 | break; |
369 | case NL80211_IFTYPE_STATION: | |
6e0bd6c3 | 370 | case NL80211_IFTYPE_OCB: |
2beb6dab LC |
371 | case NL80211_IFTYPE_P2P_CLIENT: |
372 | case NL80211_IFTYPE_MONITOR: | |
373 | case NL80211_IFTYPE_AP_VLAN: | |
374 | case NL80211_IFTYPE_WDS: | |
375 | case NL80211_IFTYPE_P2P_DEVICE: | |
cb3b7d87 | 376 | case NL80211_IFTYPE_NAN: |
2beb6dab | 377 | break; |
00ec75fc | 378 | case NL80211_IFTYPE_UNSPECIFIED: |
2beb6dab LC |
379 | case NUM_NL80211_IFTYPES: |
380 | WARN_ON(1); | |
381 | } | |
382 | ||
383 | return 0; | |
04f39047 | 384 | } |
774f0734 | 385 | EXPORT_SYMBOL(cfg80211_chandef_dfs_required); |
04f39047 | 386 | |
fe7c3a1f JD |
387 | static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, |
388 | u32 center_freq, | |
389 | u32 bandwidth) | |
390 | { | |
391 | struct ieee80211_channel *c; | |
392 | u32 freq, start_freq, end_freq; | |
393 | int count = 0; | |
394 | ||
395 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
396 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
397 | ||
398 | /* | |
399 | * Check entire range of channels for the bandwidth. | |
400 | * Check all channels are DFS channels (DFS_USABLE or | |
401 | * DFS_AVAILABLE). Return number of usable channels | |
402 | * (require CAC). Allow DFS and non-DFS channel mix. | |
403 | */ | |
404 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
405 | c = ieee80211_get_channel(wiphy, freq); | |
406 | if (!c) | |
407 | return -EINVAL; | |
408 | ||
409 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
410 | return -EINVAL; | |
411 | ||
412 | if (c->flags & IEEE80211_CHAN_RADAR) { | |
413 | if (c->dfs_state == NL80211_DFS_UNAVAILABLE) | |
414 | return -EINVAL; | |
415 | ||
416 | if (c->dfs_state == NL80211_DFS_USABLE) | |
417 | count++; | |
418 | } | |
419 | } | |
420 | ||
421 | return count; | |
422 | } | |
423 | ||
424 | bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, | |
425 | const struct cfg80211_chan_def *chandef) | |
426 | { | |
427 | int width; | |
428 | int r1, r2 = 0; | |
429 | ||
430 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
431 | return false; | |
432 | ||
433 | width = cfg80211_chandef_get_width(chandef); | |
434 | if (width < 0) | |
435 | return false; | |
436 | ||
437 | r1 = cfg80211_get_chans_dfs_usable(wiphy, chandef->center_freq1, | |
438 | width); | |
439 | ||
440 | if (r1 < 0) | |
441 | return false; | |
442 | ||
443 | switch (chandef->width) { | |
444 | case NL80211_CHAN_WIDTH_80P80: | |
445 | WARN_ON(!chandef->center_freq2); | |
446 | r2 = cfg80211_get_chans_dfs_usable(wiphy, | |
447 | chandef->center_freq2, | |
448 | width); | |
449 | if (r2 < 0) | |
450 | return false; | |
451 | break; | |
452 | default: | |
453 | WARN_ON(chandef->center_freq2); | |
454 | break; | |
455 | } | |
456 | ||
457 | return (r1 + r2 > 0); | |
458 | } | |
459 | ||
b35a51c7 VT |
460 | /* |
461 | * Checks if center frequency of chan falls with in the bandwidth | |
462 | * range of chandef. | |
463 | */ | |
464 | bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, | |
465 | struct ieee80211_channel *chan) | |
466 | { | |
467 | int width; | |
a67a4893 | 468 | u32 freq; |
b35a51c7 VT |
469 | |
470 | if (chandef->chan->center_freq == chan->center_freq) | |
471 | return true; | |
472 | ||
473 | width = cfg80211_chandef_get_width(chandef); | |
474 | if (width <= 20) | |
475 | return false; | |
476 | ||
b35a51c7 VT |
477 | for (freq = chandef->center_freq1 - width / 2 + 10; |
478 | freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { | |
479 | if (chan->center_freq == freq) | |
480 | return true; | |
481 | } | |
482 | ||
483 | if (!chandef->center_freq2) | |
484 | return false; | |
485 | ||
486 | for (freq = chandef->center_freq2 - width / 2 + 10; | |
487 | freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { | |
488 | if (chan->center_freq == freq) | |
489 | return true; | |
490 | } | |
491 | ||
492 | return false; | |
493 | } | |
494 | ||
495 | bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) | |
496 | { | |
497 | bool active = false; | |
498 | ||
499 | ASSERT_WDEV_LOCK(wdev); | |
500 | ||
501 | if (!wdev->chandef.chan) | |
502 | return false; | |
503 | ||
504 | switch (wdev->iftype) { | |
505 | case NL80211_IFTYPE_AP: | |
506 | case NL80211_IFTYPE_P2P_GO: | |
507 | active = wdev->beacon_interval != 0; | |
508 | break; | |
509 | case NL80211_IFTYPE_ADHOC: | |
510 | active = wdev->ssid_len != 0; | |
511 | break; | |
512 | case NL80211_IFTYPE_MESH_POINT: | |
513 | active = wdev->mesh_id_len != 0; | |
514 | break; | |
515 | case NL80211_IFTYPE_STATION: | |
516 | case NL80211_IFTYPE_OCB: | |
517 | case NL80211_IFTYPE_P2P_CLIENT: | |
518 | case NL80211_IFTYPE_MONITOR: | |
519 | case NL80211_IFTYPE_AP_VLAN: | |
520 | case NL80211_IFTYPE_WDS: | |
521 | case NL80211_IFTYPE_P2P_DEVICE: | |
522 | /* Can NAN type be considered as beaconing interface? */ | |
523 | case NL80211_IFTYPE_NAN: | |
524 | break; | |
525 | case NL80211_IFTYPE_UNSPECIFIED: | |
526 | case NUM_NL80211_IFTYPES: | |
527 | WARN_ON(1); | |
528 | } | |
529 | ||
530 | return active; | |
531 | } | |
532 | ||
89766727 VT |
533 | static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy, |
534 | struct ieee80211_channel *chan) | |
b35a51c7 VT |
535 | { |
536 | struct wireless_dev *wdev; | |
537 | ||
b35a51c7 VT |
538 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
539 | wdev_lock(wdev); | |
540 | if (!cfg80211_beaconing_iface_active(wdev)) { | |
541 | wdev_unlock(wdev); | |
542 | continue; | |
543 | } | |
544 | ||
545 | if (cfg80211_is_sub_chan(&wdev->chandef, chan)) { | |
546 | wdev_unlock(wdev); | |
547 | return true; | |
548 | } | |
549 | wdev_unlock(wdev); | |
550 | } | |
551 | ||
552 | return false; | |
553 | } | |
fe7c3a1f | 554 | |
89766727 VT |
555 | bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, |
556 | struct ieee80211_channel *chan) | |
557 | { | |
558 | struct cfg80211_registered_device *rdev; | |
559 | ||
560 | ASSERT_RTNL(); | |
561 | ||
562 | if (!(chan->flags & IEEE80211_CHAN_RADAR)) | |
563 | return false; | |
564 | ||
565 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
566 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) | |
567 | continue; | |
568 | ||
569 | if (cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan)) | |
570 | return true; | |
571 | } | |
572 | ||
573 | return false; | |
574 | } | |
575 | ||
6bc54fbc JD |
576 | static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, |
577 | u32 center_freq, | |
578 | u32 bandwidth) | |
3d9d1d66 JB |
579 | { |
580 | struct ieee80211_channel *c; | |
2f301ab2 SW |
581 | u32 freq, start_freq, end_freq; |
582 | ||
40d1ba63 JD |
583 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
584 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
3d9d1d66 | 585 | |
6bc54fbc JD |
586 | /* |
587 | * Check entire range of channels for the bandwidth. | |
588 | * If any channel in between is disabled or has not | |
589 | * had gone through CAC return false | |
590 | */ | |
2f301ab2 | 591 | for (freq = start_freq; freq <= end_freq; freq += 20) { |
3d9d1d66 | 592 | c = ieee80211_get_channel(wiphy, freq); |
04f39047 SW |
593 | if (!c) |
594 | return false; | |
595 | ||
6bc54fbc JD |
596 | if (c->flags & IEEE80211_CHAN_DISABLED) |
597 | return false; | |
598 | ||
599 | if ((c->flags & IEEE80211_CHAN_RADAR) && | |
04f39047 SW |
600 | (c->dfs_state != NL80211_DFS_AVAILABLE)) |
601 | return false; | |
6bc54fbc JD |
602 | } |
603 | ||
604 | return true; | |
605 | } | |
606 | ||
607 | static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, | |
608 | const struct cfg80211_chan_def *chandef) | |
609 | { | |
610 | int width; | |
611 | int r; | |
612 | ||
613 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
614 | return false; | |
615 | ||
616 | width = cfg80211_chandef_get_width(chandef); | |
617 | if (width < 0) | |
618 | return false; | |
619 | ||
620 | r = cfg80211_get_chans_dfs_available(wiphy, chandef->center_freq1, | |
621 | width); | |
622 | ||
623 | /* If any of channels unavailable for cf1 just return */ | |
624 | if (!r) | |
625 | return r; | |
626 | ||
627 | switch (chandef->width) { | |
628 | case NL80211_CHAN_WIDTH_80P80: | |
629 | WARN_ON(!chandef->center_freq2); | |
630 | r = cfg80211_get_chans_dfs_available(wiphy, | |
631 | chandef->center_freq2, | |
632 | width); | |
680682d4 | 633 | break; |
6bc54fbc JD |
634 | default: |
635 | WARN_ON(chandef->center_freq2); | |
636 | break; | |
637 | } | |
638 | ||
639 | return r; | |
640 | } | |
641 | ||
31559f35 JD |
642 | static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, |
643 | u32 center_freq, | |
644 | u32 bandwidth) | |
645 | { | |
646 | struct ieee80211_channel *c; | |
647 | u32 start_freq, end_freq, freq; | |
648 | unsigned int dfs_cac_ms = 0; | |
649 | ||
650 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
651 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
652 | ||
653 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
654 | c = ieee80211_get_channel(wiphy, freq); | |
655 | if (!c) | |
656 | return 0; | |
657 | ||
658 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
659 | return 0; | |
660 | ||
661 | if (!(c->flags & IEEE80211_CHAN_RADAR)) | |
662 | continue; | |
663 | ||
664 | if (c->dfs_cac_ms > dfs_cac_ms) | |
665 | dfs_cac_ms = c->dfs_cac_ms; | |
666 | } | |
667 | ||
668 | return dfs_cac_ms; | |
669 | } | |
670 | ||
671 | unsigned int | |
672 | cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, | |
673 | const struct cfg80211_chan_def *chandef) | |
674 | { | |
675 | int width; | |
676 | unsigned int t1 = 0, t2 = 0; | |
677 | ||
678 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
679 | return 0; | |
680 | ||
681 | width = cfg80211_chandef_get_width(chandef); | |
682 | if (width < 0) | |
683 | return 0; | |
684 | ||
685 | t1 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
686 | chandef->center_freq1, | |
687 | width); | |
688 | ||
689 | if (!chandef->center_freq2) | |
690 | return t1; | |
691 | ||
692 | t2 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
693 | chandef->center_freq2, | |
694 | width); | |
695 | ||
696 | return max(t1, t2); | |
697 | } | |
6bc54fbc JD |
698 | |
699 | static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, | |
700 | u32 center_freq, u32 bandwidth, | |
701 | u32 prohibited_flags) | |
702 | { | |
703 | struct ieee80211_channel *c; | |
704 | u32 freq, start_freq, end_freq; | |
04f39047 | 705 | |
6bc54fbc JD |
706 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
707 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
708 | ||
709 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
710 | c = ieee80211_get_channel(wiphy, freq); | |
711 | if (!c || c->flags & prohibited_flags) | |
3d9d1d66 | 712 | return false; |
9236d838 LR |
713 | } |
714 | ||
3d9d1d66 JB |
715 | return true; |
716 | } | |
717 | ||
9f5e8f6e JB |
718 | bool cfg80211_chandef_usable(struct wiphy *wiphy, |
719 | const struct cfg80211_chan_def *chandef, | |
720 | u32 prohibited_flags) | |
3d9d1d66 | 721 | { |
9f5e8f6e JB |
722 | struct ieee80211_sta_ht_cap *ht_cap; |
723 | struct ieee80211_sta_vht_cap *vht_cap; | |
08f6f147 | 724 | u32 width, control_freq, cap; |
3d9d1d66 | 725 | |
9f5e8f6e JB |
726 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
727 | return false; | |
3d9d1d66 | 728 | |
9f5e8f6e JB |
729 | ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; |
730 | vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; | |
3d9d1d66 | 731 | |
9f5e8f6e | 732 | control_freq = chandef->chan->center_freq; |
9236d838 | 733 | |
3d9d1d66 | 734 | switch (chandef->width) { |
2f301ab2 SW |
735 | case NL80211_CHAN_WIDTH_5: |
736 | width = 5; | |
737 | break; | |
738 | case NL80211_CHAN_WIDTH_10: | |
ea077c1c | 739 | prohibited_flags |= IEEE80211_CHAN_NO_10MHZ; |
2f301ab2 SW |
740 | width = 10; |
741 | break; | |
3d9d1d66 | 742 | case NL80211_CHAN_WIDTH_20: |
9f5e8f6e JB |
743 | if (!ht_cap->ht_supported) |
744 | return false; | |
745 | case NL80211_CHAN_WIDTH_20_NOHT: | |
ea077c1c | 746 | prohibited_flags |= IEEE80211_CHAN_NO_20MHZ; |
3d9d1d66 JB |
747 | width = 20; |
748 | break; | |
749 | case NL80211_CHAN_WIDTH_40: | |
750 | width = 40; | |
9f5e8f6e JB |
751 | if (!ht_cap->ht_supported) |
752 | return false; | |
753 | if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || | |
754 | ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) | |
755 | return false; | |
756 | if (chandef->center_freq1 < control_freq && | |
757 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
758 | return false; | |
759 | if (chandef->center_freq1 > control_freq && | |
760 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
761 | return false; | |
3d9d1d66 | 762 | break; |
3d9d1d66 | 763 | case NL80211_CHAN_WIDTH_80P80: |
08f6f147 JM |
764 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
765 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
9f5e8f6e JB |
766 | return false; |
767 | case NL80211_CHAN_WIDTH_80: | |
768 | if (!vht_cap->vht_supported) | |
769 | return false; | |
c7a6ee27 | 770 | prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; |
3d9d1d66 JB |
771 | width = 80; |
772 | break; | |
773 | case NL80211_CHAN_WIDTH_160: | |
9f5e8f6e JB |
774 | if (!vht_cap->vht_supported) |
775 | return false; | |
08f6f147 JM |
776 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
777 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
778 | cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
9f5e8f6e | 779 | return false; |
c7a6ee27 | 780 | prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; |
3d9d1d66 JB |
781 | width = 160; |
782 | break; | |
783 | default: | |
784 | WARN_ON_ONCE(1); | |
9236d838 | 785 | return false; |
4ee3e063 | 786 | } |
3d9d1d66 | 787 | |
c7a6ee27 JB |
788 | /* |
789 | * TODO: What if there are only certain 80/160/80+80 MHz channels | |
790 | * allowed by the driver, or only certain combinations? | |
791 | * For 40 MHz the driver can set the NO_HT40 flags, but for | |
792 | * 80/160 MHz and in particular 80+80 MHz this isn't really | |
793 | * feasible and we only have NO_80MHZ/NO_160MHZ so far but | |
794 | * no way to cover 80+80 MHz or more complex restrictions. | |
795 | * Note that such restrictions also need to be advertised to | |
796 | * userspace, for example for P2P channel selection. | |
797 | */ | |
9f5e8f6e | 798 | |
a6662dba JB |
799 | if (width > 20) |
800 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
801 | ||
2f301ab2 SW |
802 | /* 5 and 10 MHz are only defined for the OFDM PHY */ |
803 | if (width < 20) | |
804 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
805 | ||
806 | ||
9f5e8f6e JB |
807 | if (!cfg80211_secondary_chans_ok(wiphy, chandef->center_freq1, |
808 | width, prohibited_flags)) | |
809 | return false; | |
810 | ||
811 | if (!chandef->center_freq2) | |
812 | return true; | |
813 | return cfg80211_secondary_chans_ok(wiphy, chandef->center_freq2, | |
814 | width, prohibited_flags); | |
815 | } | |
816 | EXPORT_SYMBOL(cfg80211_chandef_usable); | |
817 | ||
174e0cd2 | 818 | /* |
06f207fc AN |
819 | * Check if the channel can be used under permissive conditions mandated by |
820 | * some regulatory bodies, i.e., the channel is marked with | |
821 | * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface | |
174e0cd2 IP |
822 | * associated to an AP on the same channel or on the same UNII band |
823 | * (assuming that the AP is an authorized master). | |
06f207fc | 824 | * In addition allow operation on a channel on which indoor operation is |
c8866e55 | 825 | * allowed, iff we are currently operating in an indoor environment. |
174e0cd2 | 826 | */ |
06f207fc AN |
827 | static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, |
828 | enum nl80211_iftype iftype, | |
174e0cd2 IP |
829 | struct ieee80211_channel *chan) |
830 | { | |
be69c24a | 831 | struct wireless_dev *wdev; |
06f207fc | 832 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
174e0cd2 IP |
833 | |
834 | ASSERT_RTNL(); | |
835 | ||
97f2645f | 836 | if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) || |
c8866e55 IP |
837 | !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)) |
838 | return false; | |
839 | ||
06f207fc AN |
840 | /* only valid for GO and TDLS off-channel (station/p2p-CL) */ |
841 | if (iftype != NL80211_IFTYPE_P2P_GO && | |
842 | iftype != NL80211_IFTYPE_STATION && | |
843 | iftype != NL80211_IFTYPE_P2P_CLIENT) | |
844 | return false; | |
845 | ||
c8866e55 IP |
846 | if (regulatory_indoor_allowed() && |
847 | (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
848 | return true; | |
849 | ||
06f207fc | 850 | if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT)) |
174e0cd2 IP |
851 | return false; |
852 | ||
853 | /* | |
854 | * Generally, it is possible to rely on another device/driver to allow | |
06f207fc | 855 | * the IR concurrent relaxation, however, since the device can further |
174e0cd2 IP |
856 | * enforce the relaxation (by doing a similar verifications as this), |
857 | * and thus fail the GO instantiation, consider only the interfaces of | |
858 | * the current registered device. | |
859 | */ | |
53873f13 | 860 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
174e0cd2 IP |
861 | struct ieee80211_channel *other_chan = NULL; |
862 | int r1, r2; | |
863 | ||
be69c24a AS |
864 | wdev_lock(wdev); |
865 | if (wdev->iftype == NL80211_IFTYPE_STATION && | |
866 | wdev->current_bss) | |
867 | other_chan = wdev->current_bss->pub.channel; | |
868 | ||
869 | /* | |
870 | * If a GO already operates on the same GO_CONCURRENT channel, | |
871 | * this one (maybe the same one) can beacon as well. We allow | |
872 | * the operation even if the station we relied on with | |
873 | * GO_CONCURRENT is disconnected now. But then we must make sure | |
874 | * we're not outdoor on an indoor-only channel. | |
875 | */ | |
06f207fc AN |
876 | if (iftype == NL80211_IFTYPE_P2P_GO && |
877 | wdev->iftype == NL80211_IFTYPE_P2P_GO && | |
be69c24a AS |
878 | wdev->beacon_interval && |
879 | !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
880 | other_chan = wdev->chandef.chan; | |
881 | wdev_unlock(wdev); | |
174e0cd2 IP |
882 | |
883 | if (!other_chan) | |
884 | continue; | |
885 | ||
886 | if (chan == other_chan) | |
887 | return true; | |
888 | ||
57fbcce3 | 889 | if (chan->band != NL80211_BAND_5GHZ) |
174e0cd2 IP |
890 | continue; |
891 | ||
892 | r1 = cfg80211_get_unii(chan->center_freq); | |
893 | r2 = cfg80211_get_unii(other_chan->center_freq); | |
894 | ||
46d53724 IP |
895 | if (r1 != -EINVAL && r1 == r2) { |
896 | /* | |
897 | * At some locations channels 149-165 are considered a | |
898 | * bundle, but at other locations, e.g., Indonesia, | |
899 | * channels 149-161 are considered a bundle while | |
900 | * channel 165 is left out and considered to be in a | |
901 | * different bundle. Thus, in case that there is a | |
902 | * station interface connected to an AP on channel 165, | |
903 | * it is assumed that channels 149-161 are allowed for | |
904 | * GO operations. However, having a station interface | |
905 | * connected to an AP on channels 149-161, does not | |
906 | * allow GO operation on channel 165. | |
907 | */ | |
908 | if (chan->center_freq == 5825 && | |
909 | other_chan->center_freq != 5825) | |
910 | continue; | |
174e0cd2 | 911 | return true; |
46d53724 | 912 | } |
174e0cd2 IP |
913 | } |
914 | ||
915 | return false; | |
916 | } | |
917 | ||
923b352f AN |
918 | static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, |
919 | struct cfg80211_chan_def *chandef, | |
920 | enum nl80211_iftype iftype, | |
921 | bool check_no_ir) | |
9f5e8f6e JB |
922 | { |
923 | bool res; | |
6bc54fbc | 924 | u32 prohibited_flags = IEEE80211_CHAN_DISABLED | |
6bc54fbc | 925 | IEEE80211_CHAN_RADAR; |
9f5e8f6e | 926 | |
923b352f | 927 | trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); |
174e0cd2 | 928 | |
923b352f | 929 | if (check_no_ir) |
174e0cd2 | 930 | prohibited_flags |= IEEE80211_CHAN_NO_IR; |
3d9d1d66 | 931 | |
00ec75fc | 932 | if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 && |
6bc54fbc JD |
933 | cfg80211_chandef_dfs_available(wiphy, chandef)) { |
934 | /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ | |
935 | prohibited_flags = IEEE80211_CHAN_DISABLED; | |
936 | } | |
937 | ||
938 | res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); | |
3d9d1d66 JB |
939 | |
940 | trace_cfg80211_return_bool(res); | |
941 | return res; | |
9236d838 | 942 | } |
923b352f AN |
943 | |
944 | bool cfg80211_reg_can_beacon(struct wiphy *wiphy, | |
945 | struct cfg80211_chan_def *chandef, | |
946 | enum nl80211_iftype iftype) | |
947 | { | |
948 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); | |
949 | } | |
683b6d3b | 950 | EXPORT_SYMBOL(cfg80211_reg_can_beacon); |
9236d838 | 951 | |
923b352f AN |
952 | bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, |
953 | struct cfg80211_chan_def *chandef, | |
954 | enum nl80211_iftype iftype) | |
955 | { | |
956 | bool check_no_ir; | |
957 | ||
958 | ASSERT_RTNL(); | |
959 | ||
960 | /* | |
961 | * Under certain conditions suggested by some regulatory bodies a | |
962 | * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag | |
963 | * only if such relaxations are not enabled and the conditions are not | |
964 | * met. | |
965 | */ | |
966 | check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, | |
967 | chandef->chan); | |
968 | ||
969 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); | |
970 | } | |
971 | EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); | |
972 | ||
e8c9bd5b | 973 | int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, |
683b6d3b | 974 | struct cfg80211_chan_def *chandef) |
9588bbd5 | 975 | { |
e8c9bd5b | 976 | if (!rdev->ops->set_monitor_channel) |
9588bbd5 | 977 | return -EOPNOTSUPP; |
4f03c1ed MK |
978 | if (!cfg80211_has_monitors_only(rdev)) |
979 | return -EBUSY; | |
9588bbd5 | 980 | |
683b6d3b | 981 | return rdev_set_monitor_channel(rdev, chandef); |
59bbb6f7 | 982 | } |
26ab9a0c MK |
983 | |
984 | void | |
8e95ea49 | 985 | cfg80211_get_chan_state(struct wireless_dev *wdev, |
26ab9a0c | 986 | struct ieee80211_channel **chan, |
9e0e2961 MK |
987 | enum cfg80211_chan_mode *chanmode, |
988 | u8 *radar_detect) | |
26ab9a0c | 989 | { |
2beb6dab LC |
990 | int ret; |
991 | ||
26ab9a0c MK |
992 | *chan = NULL; |
993 | *chanmode = CHAN_MODE_UNDEFINED; | |
994 | ||
26ab9a0c MK |
995 | ASSERT_WDEV_LOCK(wdev); |
996 | ||
98104fde | 997 | if (wdev->netdev && !netif_running(wdev->netdev)) |
26ab9a0c MK |
998 | return; |
999 | ||
1000 | switch (wdev->iftype) { | |
1001 | case NL80211_IFTYPE_ADHOC: | |
1002 | if (wdev->current_bss) { | |
1003 | *chan = wdev->current_bss->pub.channel; | |
5336fa88 SW |
1004 | *chanmode = (wdev->ibss_fixed && |
1005 | !wdev->ibss_dfs_possible) | |
26ab9a0c MK |
1006 | ? CHAN_MODE_SHARED |
1007 | : CHAN_MODE_EXCLUSIVE; | |
9e0e2961 MK |
1008 | |
1009 | /* consider worst-case - IBSS can try to return to the | |
1010 | * original user-specified channel as creator */ | |
1011 | if (wdev->ibss_dfs_possible) | |
1012 | *radar_detect |= BIT(wdev->chandef.width); | |
26ab9a0c MK |
1013 | return; |
1014 | } | |
0f0094b3 | 1015 | break; |
26ab9a0c MK |
1016 | case NL80211_IFTYPE_STATION: |
1017 | case NL80211_IFTYPE_P2P_CLIENT: | |
1018 | if (wdev->current_bss) { | |
1019 | *chan = wdev->current_bss->pub.channel; | |
1020 | *chanmode = CHAN_MODE_SHARED; | |
1021 | return; | |
1022 | } | |
1023 | break; | |
1024 | case NL80211_IFTYPE_AP: | |
1025 | case NL80211_IFTYPE_P2P_GO: | |
04f39047 | 1026 | if (wdev->cac_started) { |
9e0e2961 | 1027 | *chan = wdev->chandef.chan; |
04f39047 | 1028 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1029 | *radar_detect |= BIT(wdev->chandef.width); |
04f39047 | 1030 | } else if (wdev->beacon_interval) { |
9e0e2961 | 1031 | *chan = wdev->chandef.chan; |
f53594a0 | 1032 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1033 | |
2beb6dab LC |
1034 | ret = cfg80211_chandef_dfs_required(wdev->wiphy, |
1035 | &wdev->chandef, | |
1036 | wdev->iftype); | |
1037 | WARN_ON(ret < 0); | |
1038 | if (ret > 0) | |
9e0e2961 | 1039 | *radar_detect |= BIT(wdev->chandef.width); |
f53594a0 FF |
1040 | } |
1041 | return; | |
26ab9a0c | 1042 | case NL80211_IFTYPE_MESH_POINT: |
f53594a0 | 1043 | if (wdev->mesh_id_len) { |
9e0e2961 | 1044 | *chan = wdev->chandef.chan; |
f53594a0 | 1045 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1046 | |
2beb6dab LC |
1047 | ret = cfg80211_chandef_dfs_required(wdev->wiphy, |
1048 | &wdev->chandef, | |
1049 | wdev->iftype); | |
1050 | WARN_ON(ret < 0); | |
1051 | if (ret > 0) | |
9e0e2961 | 1052 | *radar_detect |= BIT(wdev->chandef.width); |
f53594a0 | 1053 | } |
26ab9a0c | 1054 | return; |
6e0bd6c3 RL |
1055 | case NL80211_IFTYPE_OCB: |
1056 | if (wdev->chandef.chan) { | |
1057 | *chan = wdev->chandef.chan; | |
1058 | *chanmode = CHAN_MODE_SHARED; | |
1059 | return; | |
1060 | } | |
1061 | break; | |
26ab9a0c MK |
1062 | case NL80211_IFTYPE_MONITOR: |
1063 | case NL80211_IFTYPE_AP_VLAN: | |
1064 | case NL80211_IFTYPE_WDS: | |
98104fde | 1065 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 1066 | case NL80211_IFTYPE_NAN: |
e7aceef4 | 1067 | /* these interface types don't really have a channel */ |
98104fde | 1068 | return; |
26ab9a0c MK |
1069 | case NL80211_IFTYPE_UNSPECIFIED: |
1070 | case NUM_NL80211_IFTYPES: | |
1071 | WARN_ON(1); | |
1072 | } | |
26ab9a0c | 1073 | } |