2 * This file contains helper code to handle channel
3 * settings and keeping track of what is possible at
6 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 #include <linux/export.h>
11 #include <net/cfg80211.h>
15 void cfg80211_chandef_create(struct cfg80211_chan_def *chandef,
16 struct ieee80211_channel *chan,
17 enum nl80211_channel_type chan_type)
23 chandef->center_freq2 = 0;
26 case NL80211_CHAN_NO_HT:
27 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
28 chandef->center_freq1 = chan->center_freq;
30 case NL80211_CHAN_HT20:
31 chandef->width = NL80211_CHAN_WIDTH_20;
32 chandef->center_freq1 = chan->center_freq;
34 case NL80211_CHAN_HT40PLUS:
35 chandef->width = NL80211_CHAN_WIDTH_40;
36 chandef->center_freq1 = chan->center_freq + 10;
38 case NL80211_CHAN_HT40MINUS:
39 chandef->width = NL80211_CHAN_WIDTH_40;
40 chandef->center_freq1 = chan->center_freq - 10;
46 EXPORT_SYMBOL(cfg80211_chandef_create);
48 bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
55 control_freq = chandef->chan->center_freq;
57 switch (chandef->width) {
58 case NL80211_CHAN_WIDTH_5:
59 case NL80211_CHAN_WIDTH_10:
60 case NL80211_CHAN_WIDTH_20:
61 case NL80211_CHAN_WIDTH_20_NOHT:
62 if (chandef->center_freq1 != control_freq)
64 if (chandef->center_freq2)
67 case NL80211_CHAN_WIDTH_40:
68 if (chandef->center_freq1 != control_freq + 10 &&
69 chandef->center_freq1 != control_freq - 10)
71 if (chandef->center_freq2)
74 case NL80211_CHAN_WIDTH_80P80:
75 if (chandef->center_freq1 != control_freq + 30 &&
76 chandef->center_freq1 != control_freq + 10 &&
77 chandef->center_freq1 != control_freq - 10 &&
78 chandef->center_freq1 != control_freq - 30)
80 if (!chandef->center_freq2)
82 /* adjacent is not allowed -- that's a 160 MHz channel */
83 if (chandef->center_freq1 - chandef->center_freq2 == 80 ||
84 chandef->center_freq2 - chandef->center_freq1 == 80)
87 case NL80211_CHAN_WIDTH_80:
88 if (chandef->center_freq1 != control_freq + 30 &&
89 chandef->center_freq1 != control_freq + 10 &&
90 chandef->center_freq1 != control_freq - 10 &&
91 chandef->center_freq1 != control_freq - 30)
93 if (chandef->center_freq2)
96 case NL80211_CHAN_WIDTH_160:
97 if (chandef->center_freq1 != control_freq + 70 &&
98 chandef->center_freq1 != control_freq + 50 &&
99 chandef->center_freq1 != control_freq + 30 &&
100 chandef->center_freq1 != control_freq + 10 &&
101 chandef->center_freq1 != control_freq - 10 &&
102 chandef->center_freq1 != control_freq - 30 &&
103 chandef->center_freq1 != control_freq - 50 &&
104 chandef->center_freq1 != control_freq - 70)
106 if (chandef->center_freq2)
115 EXPORT_SYMBOL(cfg80211_chandef_valid);
117 static void chandef_primary_freqs(const struct cfg80211_chan_def *c,
118 u32 *pri40, u32 *pri80)
123 case NL80211_CHAN_WIDTH_40:
124 *pri40 = c->center_freq1;
127 case NL80211_CHAN_WIDTH_80:
128 case NL80211_CHAN_WIDTH_80P80:
129 *pri80 = c->center_freq1;
131 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
135 *pri40 = c->center_freq1 - 20 + 40 * tmp;
137 case NL80211_CHAN_WIDTH_160:
139 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
143 *pri40 = c->center_freq1 - 60 + 40 * tmp;
146 *pri80 = c->center_freq1 - 40 + 80 * tmp;
153 static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c)
158 case NL80211_CHAN_WIDTH_5:
161 case NL80211_CHAN_WIDTH_10:
164 case NL80211_CHAN_WIDTH_20:
165 case NL80211_CHAN_WIDTH_20_NOHT:
168 case NL80211_CHAN_WIDTH_40:
171 case NL80211_CHAN_WIDTH_80P80:
172 case NL80211_CHAN_WIDTH_80:
175 case NL80211_CHAN_WIDTH_160:
185 const struct cfg80211_chan_def *
186 cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1,
187 const struct cfg80211_chan_def *c2)
189 u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80;
191 /* If they are identical, return */
192 if (cfg80211_chandef_identical(c1, c2))
195 /* otherwise, must have same control channel */
196 if (c1->chan != c2->chan)
200 * If they have the same width, but aren't identical,
201 * then they can't be compatible.
203 if (c1->width == c2->width)
207 * can't be compatible if one of them is 5 or 10 MHz,
208 * but they don't have the same width.
210 if (c1->width == NL80211_CHAN_WIDTH_5 ||
211 c1->width == NL80211_CHAN_WIDTH_10 ||
212 c2->width == NL80211_CHAN_WIDTH_5 ||
213 c2->width == NL80211_CHAN_WIDTH_10)
216 if (c1->width == NL80211_CHAN_WIDTH_20_NOHT ||
217 c1->width == NL80211_CHAN_WIDTH_20)
220 if (c2->width == NL80211_CHAN_WIDTH_20_NOHT ||
221 c2->width == NL80211_CHAN_WIDTH_20)
224 chandef_primary_freqs(c1, &c1_pri40, &c1_pri80);
225 chandef_primary_freqs(c2, &c2_pri40, &c2_pri80);
227 if (c1_pri40 != c2_pri40)
230 WARN_ON(!c1_pri80 && !c2_pri80);
231 if (c1_pri80 && c2_pri80 && c1_pri80 != c2_pri80)
234 if (c1->width > c2->width)
238 EXPORT_SYMBOL(cfg80211_chandef_compatible);
240 static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq,
242 enum nl80211_dfs_state dfs_state)
244 struct ieee80211_channel *c;
247 for (freq = center_freq - bandwidth/2 + 10;
248 freq <= center_freq + bandwidth/2 - 10;
250 c = ieee80211_get_channel(wiphy, freq);
251 if (!c || !(c->flags & IEEE80211_CHAN_RADAR))
254 c->dfs_state = dfs_state;
255 c->dfs_state_entered = jiffies;
259 void cfg80211_set_dfs_state(struct wiphy *wiphy,
260 const struct cfg80211_chan_def *chandef,
261 enum nl80211_dfs_state dfs_state)
265 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
268 width = cfg80211_chandef_get_width(chandef);
272 cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1,
275 if (!chandef->center_freq2)
277 cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2,
281 static u32 cfg80211_get_start_freq(u32 center_freq,
287 start_freq = center_freq;
289 start_freq = center_freq - bandwidth/2 + 10;
294 static u32 cfg80211_get_end_freq(u32 center_freq,
300 end_freq = center_freq;
302 end_freq = center_freq + bandwidth/2 - 10;
307 static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,
311 struct ieee80211_channel *c;
312 u32 freq, start_freq, end_freq;
314 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
315 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
317 for (freq = start_freq; freq <= end_freq; freq += 20) {
318 c = ieee80211_get_channel(wiphy, freq);
322 if (c->flags & IEEE80211_CHAN_RADAR)
329 int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
330 const struct cfg80211_chan_def *chandef,
331 enum nl80211_iftype iftype)
336 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
340 case NL80211_IFTYPE_ADHOC:
341 case NL80211_IFTYPE_AP:
342 case NL80211_IFTYPE_P2P_GO:
343 case NL80211_IFTYPE_MESH_POINT:
344 width = cfg80211_chandef_get_width(chandef);
348 ret = cfg80211_get_chans_dfs_required(wiphy,
349 chandef->center_freq1,
354 return BIT(chandef->width);
356 if (!chandef->center_freq2)
359 ret = cfg80211_get_chans_dfs_required(wiphy,
360 chandef->center_freq2,
365 return BIT(chandef->width);
368 case NL80211_IFTYPE_STATION:
369 case NL80211_IFTYPE_OCB:
370 case NL80211_IFTYPE_P2P_CLIENT:
371 case NL80211_IFTYPE_MONITOR:
372 case NL80211_IFTYPE_AP_VLAN:
373 case NL80211_IFTYPE_WDS:
374 case NL80211_IFTYPE_P2P_DEVICE:
376 case NL80211_IFTYPE_UNSPECIFIED:
377 case NUM_NL80211_IFTYPES:
383 EXPORT_SYMBOL(cfg80211_chandef_dfs_required);
385 static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy,
389 struct ieee80211_channel *c;
390 u32 freq, start_freq, end_freq;
393 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
394 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
397 * Check entire range of channels for the bandwidth.
398 * Check all channels are DFS channels (DFS_USABLE or
399 * DFS_AVAILABLE). Return number of usable channels
400 * (require CAC). Allow DFS and non-DFS channel mix.
402 for (freq = start_freq; freq <= end_freq; freq += 20) {
403 c = ieee80211_get_channel(wiphy, freq);
407 if (c->flags & IEEE80211_CHAN_DISABLED)
410 if (c->flags & IEEE80211_CHAN_RADAR) {
411 if (c->dfs_state == NL80211_DFS_UNAVAILABLE)
414 if (c->dfs_state == NL80211_DFS_USABLE)
422 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
423 const struct cfg80211_chan_def *chandef)
428 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
431 width = cfg80211_chandef_get_width(chandef);
435 r1 = cfg80211_get_chans_dfs_usable(wiphy, chandef->center_freq1,
441 switch (chandef->width) {
442 case NL80211_CHAN_WIDTH_80P80:
443 WARN_ON(!chandef->center_freq2);
444 r2 = cfg80211_get_chans_dfs_usable(wiphy,
445 chandef->center_freq2,
451 WARN_ON(chandef->center_freq2);
455 return (r1 + r2 > 0);
459 static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy,
463 struct ieee80211_channel *c;
464 u32 freq, start_freq, end_freq;
466 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
467 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
470 * Check entire range of channels for the bandwidth.
471 * If any channel in between is disabled or has not
472 * had gone through CAC return false
474 for (freq = start_freq; freq <= end_freq; freq += 20) {
475 c = ieee80211_get_channel(wiphy, freq);
479 if (c->flags & IEEE80211_CHAN_DISABLED)
482 if ((c->flags & IEEE80211_CHAN_RADAR) &&
483 (c->dfs_state != NL80211_DFS_AVAILABLE))
490 static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy,
491 const struct cfg80211_chan_def *chandef)
496 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
499 width = cfg80211_chandef_get_width(chandef);
503 r = cfg80211_get_chans_dfs_available(wiphy, chandef->center_freq1,
506 /* If any of channels unavailable for cf1 just return */
510 switch (chandef->width) {
511 case NL80211_CHAN_WIDTH_80P80:
512 WARN_ON(!chandef->center_freq2);
513 r = cfg80211_get_chans_dfs_available(wiphy,
514 chandef->center_freq2,
517 WARN_ON(chandef->center_freq2);
524 static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy,
528 struct ieee80211_channel *c;
529 u32 start_freq, end_freq, freq;
530 unsigned int dfs_cac_ms = 0;
532 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
533 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
535 for (freq = start_freq; freq <= end_freq; freq += 20) {
536 c = ieee80211_get_channel(wiphy, freq);
540 if (c->flags & IEEE80211_CHAN_DISABLED)
543 if (!(c->flags & IEEE80211_CHAN_RADAR))
546 if (c->dfs_cac_ms > dfs_cac_ms)
547 dfs_cac_ms = c->dfs_cac_ms;
554 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
555 const struct cfg80211_chan_def *chandef)
558 unsigned int t1 = 0, t2 = 0;
560 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
563 width = cfg80211_chandef_get_width(chandef);
567 t1 = cfg80211_get_chans_dfs_cac_time(wiphy,
568 chandef->center_freq1,
571 if (!chandef->center_freq2)
574 t2 = cfg80211_get_chans_dfs_cac_time(wiphy,
575 chandef->center_freq2,
581 static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy,
582 u32 center_freq, u32 bandwidth,
583 u32 prohibited_flags)
585 struct ieee80211_channel *c;
586 u32 freq, start_freq, end_freq;
588 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
589 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
591 for (freq = start_freq; freq <= end_freq; freq += 20) {
592 c = ieee80211_get_channel(wiphy, freq);
593 if (!c || c->flags & prohibited_flags)
600 bool cfg80211_chandef_usable(struct wiphy *wiphy,
601 const struct cfg80211_chan_def *chandef,
602 u32 prohibited_flags)
604 struct ieee80211_sta_ht_cap *ht_cap;
605 struct ieee80211_sta_vht_cap *vht_cap;
606 u32 width, control_freq;
608 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
611 ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap;
612 vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap;
614 control_freq = chandef->chan->center_freq;
616 switch (chandef->width) {
617 case NL80211_CHAN_WIDTH_5:
620 case NL80211_CHAN_WIDTH_10:
621 prohibited_flags |= IEEE80211_CHAN_NO_10MHZ;
624 case NL80211_CHAN_WIDTH_20:
625 if (!ht_cap->ht_supported)
627 case NL80211_CHAN_WIDTH_20_NOHT:
628 prohibited_flags |= IEEE80211_CHAN_NO_20MHZ;
631 case NL80211_CHAN_WIDTH_40:
633 if (!ht_cap->ht_supported)
635 if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
636 ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)
638 if (chandef->center_freq1 < control_freq &&
639 chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
641 if (chandef->center_freq1 > control_freq &&
642 chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
645 case NL80211_CHAN_WIDTH_80P80:
646 if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))
648 case NL80211_CHAN_WIDTH_80:
649 if (!vht_cap->vht_supported)
651 prohibited_flags |= IEEE80211_CHAN_NO_80MHZ;
654 case NL80211_CHAN_WIDTH_160:
655 if (!vht_cap->vht_supported)
657 if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ))
659 prohibited_flags |= IEEE80211_CHAN_NO_160MHZ;
668 * TODO: What if there are only certain 80/160/80+80 MHz channels
669 * allowed by the driver, or only certain combinations?
670 * For 40 MHz the driver can set the NO_HT40 flags, but for
671 * 80/160 MHz and in particular 80+80 MHz this isn't really
672 * feasible and we only have NO_80MHZ/NO_160MHZ so far but
673 * no way to cover 80+80 MHz or more complex restrictions.
674 * Note that such restrictions also need to be advertised to
675 * userspace, for example for P2P channel selection.
679 prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
681 /* 5 and 10 MHz are only defined for the OFDM PHY */
683 prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
686 if (!cfg80211_secondary_chans_ok(wiphy, chandef->center_freq1,
687 width, prohibited_flags))
690 if (!chandef->center_freq2)
692 return cfg80211_secondary_chans_ok(wiphy, chandef->center_freq2,
693 width, prohibited_flags);
695 EXPORT_SYMBOL(cfg80211_chandef_usable);
698 * For GO only, check if the channel can be used under permissive conditions
699 * mandated by the some regulatory bodies, i.e., the channel is marked with
700 * IEEE80211_CHAN_GO_CONCURRENT and there is an additional station interface
701 * associated to an AP on the same channel or on the same UNII band
702 * (assuming that the AP is an authorized master).
703 * In addition allow the GO to operate on a channel on which indoor operation is
704 * allowed, iff we are currently operating in an indoor environment.
706 static bool cfg80211_go_permissive_chan(struct cfg80211_registered_device *rdev,
707 struct ieee80211_channel *chan)
709 struct wireless_dev *wdev_iter;
710 struct wiphy *wiphy = wiphy_idx_to_wiphy(rdev->wiphy_idx);
714 if (!config_enabled(CONFIG_CFG80211_REG_RELAX_NO_IR) ||
715 !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR))
718 if (regulatory_indoor_allowed() &&
719 (chan->flags & IEEE80211_CHAN_INDOOR_ONLY))
722 if (!(chan->flags & IEEE80211_CHAN_GO_CONCURRENT))
726 * Generally, it is possible to rely on another device/driver to allow
727 * the GO concurrent relaxation, however, since the device can further
728 * enforce the relaxation (by doing a similar verifications as this),
729 * and thus fail the GO instantiation, consider only the interfaces of
730 * the current registered device.
732 list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
733 struct ieee80211_channel *other_chan = NULL;
736 if (wdev_iter->iftype != NL80211_IFTYPE_STATION ||
737 !netif_running(wdev_iter->netdev))
740 wdev_lock(wdev_iter);
741 if (wdev_iter->current_bss)
742 other_chan = wdev_iter->current_bss->pub.channel;
743 wdev_unlock(wdev_iter);
748 if (chan == other_chan)
751 if (chan->band != IEEE80211_BAND_5GHZ)
754 r1 = cfg80211_get_unii(chan->center_freq);
755 r2 = cfg80211_get_unii(other_chan->center_freq);
757 if (r1 != -EINVAL && r1 == r2) {
759 * At some locations channels 149-165 are considered a
760 * bundle, but at other locations, e.g., Indonesia,
761 * channels 149-161 are considered a bundle while
762 * channel 165 is left out and considered to be in a
763 * different bundle. Thus, in case that there is a
764 * station interface connected to an AP on channel 165,
765 * it is assumed that channels 149-161 are allowed for
766 * GO operations. However, having a station interface
767 * connected to an AP on channels 149-161, does not
768 * allow GO operation on channel 165.
770 if (chan->center_freq == 5825 &&
771 other_chan->center_freq != 5825)
780 bool cfg80211_reg_can_beacon(struct wiphy *wiphy,
781 struct cfg80211_chan_def *chandef,
782 enum nl80211_iftype iftype)
784 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
786 u32 prohibited_flags = IEEE80211_CHAN_DISABLED |
787 IEEE80211_CHAN_RADAR;
789 trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype);
792 * Under certain conditions suggested by the some regulatory bodies
793 * a GO can operate on channels marked with IEEE80211_NO_IR
794 * so set this flag only if such relaxations are not enabled and
795 * the conditions are not met.
797 if (iftype != NL80211_IFTYPE_P2P_GO ||
798 !cfg80211_go_permissive_chan(rdev, chandef->chan))
799 prohibited_flags |= IEEE80211_CHAN_NO_IR;
801 if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 &&
802 cfg80211_chandef_dfs_available(wiphy, chandef)) {
803 /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */
804 prohibited_flags = IEEE80211_CHAN_DISABLED;
807 res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags);
809 trace_cfg80211_return_bool(res);
812 EXPORT_SYMBOL(cfg80211_reg_can_beacon);
814 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
815 struct cfg80211_chan_def *chandef)
817 if (!rdev->ops->set_monitor_channel)
819 if (!cfg80211_has_monitors_only(rdev))
822 return rdev_set_monitor_channel(rdev, chandef);
826 cfg80211_get_chan_state(struct wireless_dev *wdev,
827 struct ieee80211_channel **chan,
828 enum cfg80211_chan_mode *chanmode,
834 *chanmode = CHAN_MODE_UNDEFINED;
836 ASSERT_WDEV_LOCK(wdev);
838 if (wdev->netdev && !netif_running(wdev->netdev))
841 switch (wdev->iftype) {
842 case NL80211_IFTYPE_ADHOC:
843 if (wdev->current_bss) {
844 *chan = wdev->current_bss->pub.channel;
845 *chanmode = (wdev->ibss_fixed &&
846 !wdev->ibss_dfs_possible)
848 : CHAN_MODE_EXCLUSIVE;
850 /* consider worst-case - IBSS can try to return to the
851 * original user-specified channel as creator */
852 if (wdev->ibss_dfs_possible)
853 *radar_detect |= BIT(wdev->chandef.width);
857 case NL80211_IFTYPE_STATION:
858 case NL80211_IFTYPE_P2P_CLIENT:
859 if (wdev->current_bss) {
860 *chan = wdev->current_bss->pub.channel;
861 *chanmode = CHAN_MODE_SHARED;
865 case NL80211_IFTYPE_AP:
866 case NL80211_IFTYPE_P2P_GO:
867 if (wdev->cac_started) {
868 *chan = wdev->chandef.chan;
869 *chanmode = CHAN_MODE_SHARED;
870 *radar_detect |= BIT(wdev->chandef.width);
871 } else if (wdev->beacon_interval) {
872 *chan = wdev->chandef.chan;
873 *chanmode = CHAN_MODE_SHARED;
875 ret = cfg80211_chandef_dfs_required(wdev->wiphy,
880 *radar_detect |= BIT(wdev->chandef.width);
883 case NL80211_IFTYPE_MESH_POINT:
884 if (wdev->mesh_id_len) {
885 *chan = wdev->chandef.chan;
886 *chanmode = CHAN_MODE_SHARED;
888 ret = cfg80211_chandef_dfs_required(wdev->wiphy,
893 *radar_detect |= BIT(wdev->chandef.width);
896 case NL80211_IFTYPE_OCB:
897 if (wdev->chandef.chan) {
898 *chan = wdev->chandef.chan;
899 *chanmode = CHAN_MODE_SHARED;
903 case NL80211_IFTYPE_MONITOR:
904 case NL80211_IFTYPE_AP_VLAN:
905 case NL80211_IFTYPE_WDS:
906 case NL80211_IFTYPE_P2P_DEVICE:
907 /* these interface types don't really have a channel */
909 case NL80211_IFTYPE_UNSPECIFIED:
910 case NUM_NL80211_IFTYPES: