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>
9 #include <linux/export.h>
10 #include <net/cfg80211.h>
14 void cfg80211_chandef_create(struct cfg80211_chan_def *chandef,
15 struct ieee80211_channel *chan,
16 enum nl80211_channel_type chan_type)
22 chandef->center_freq2 = 0;
25 case NL80211_CHAN_NO_HT:
26 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
27 chandef->center_freq1 = chan->center_freq;
29 case NL80211_CHAN_HT20:
30 chandef->width = NL80211_CHAN_WIDTH_20;
31 chandef->center_freq1 = chan->center_freq;
33 case NL80211_CHAN_HT40PLUS:
34 chandef->width = NL80211_CHAN_WIDTH_40;
35 chandef->center_freq1 = chan->center_freq + 10;
37 case NL80211_CHAN_HT40MINUS:
38 chandef->width = NL80211_CHAN_WIDTH_40;
39 chandef->center_freq1 = chan->center_freq - 10;
45 EXPORT_SYMBOL(cfg80211_chandef_create);
47 bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
54 control_freq = chandef->chan->center_freq;
56 switch (chandef->width) {
57 case NL80211_CHAN_WIDTH_5:
58 case NL80211_CHAN_WIDTH_10:
59 case NL80211_CHAN_WIDTH_20:
60 case NL80211_CHAN_WIDTH_20_NOHT:
61 if (chandef->center_freq1 != control_freq)
63 if (chandef->center_freq2)
66 case NL80211_CHAN_WIDTH_40:
67 if (chandef->center_freq1 != control_freq + 10 &&
68 chandef->center_freq1 != control_freq - 10)
70 if (chandef->center_freq2)
73 case NL80211_CHAN_WIDTH_80P80:
74 if (chandef->center_freq1 != control_freq + 30 &&
75 chandef->center_freq1 != control_freq + 10 &&
76 chandef->center_freq1 != control_freq - 10 &&
77 chandef->center_freq1 != control_freq - 30)
79 if (!chandef->center_freq2)
81 /* adjacent is not allowed -- that's a 160 MHz channel */
82 if (chandef->center_freq1 - chandef->center_freq2 == 80 ||
83 chandef->center_freq2 - chandef->center_freq1 == 80)
86 case NL80211_CHAN_WIDTH_80:
87 if (chandef->center_freq1 != control_freq + 30 &&
88 chandef->center_freq1 != control_freq + 10 &&
89 chandef->center_freq1 != control_freq - 10 &&
90 chandef->center_freq1 != control_freq - 30)
92 if (chandef->center_freq2)
95 case NL80211_CHAN_WIDTH_160:
96 if (chandef->center_freq1 != control_freq + 70 &&
97 chandef->center_freq1 != control_freq + 50 &&
98 chandef->center_freq1 != control_freq + 30 &&
99 chandef->center_freq1 != control_freq + 10 &&
100 chandef->center_freq1 != control_freq - 10 &&
101 chandef->center_freq1 != control_freq - 30 &&
102 chandef->center_freq1 != control_freq - 50 &&
103 chandef->center_freq1 != control_freq - 70)
105 if (chandef->center_freq2)
114 EXPORT_SYMBOL(cfg80211_chandef_valid);
116 static void chandef_primary_freqs(const struct cfg80211_chan_def *c,
117 int *pri40, int *pri80)
122 case NL80211_CHAN_WIDTH_40:
123 *pri40 = c->center_freq1;
126 case NL80211_CHAN_WIDTH_80:
127 case NL80211_CHAN_WIDTH_80P80:
128 *pri80 = c->center_freq1;
130 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
134 *pri40 = c->center_freq1 - 20 + 40 * tmp;
136 case NL80211_CHAN_WIDTH_160:
138 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
142 *pri40 = c->center_freq1 - 60 + 40 * tmp;
145 *pri80 = c->center_freq1 - 40 + 80 * tmp;
152 static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c)
157 case NL80211_CHAN_WIDTH_5:
160 case NL80211_CHAN_WIDTH_10:
163 case NL80211_CHAN_WIDTH_20:
164 case NL80211_CHAN_WIDTH_20_NOHT:
167 case NL80211_CHAN_WIDTH_40:
170 case NL80211_CHAN_WIDTH_80P80:
171 case NL80211_CHAN_WIDTH_80:
174 case NL80211_CHAN_WIDTH_160:
184 const struct cfg80211_chan_def *
185 cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1,
186 const struct cfg80211_chan_def *c2)
188 u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80;
190 /* If they are identical, return */
191 if (cfg80211_chandef_identical(c1, c2))
194 /* otherwise, must have same control channel */
195 if (c1->chan != c2->chan)
199 * If they have the same width, but aren't identical,
200 * then they can't be compatible.
202 if (c1->width == c2->width)
206 * can't be compatible if one of them is 5 or 10 MHz,
207 * but they don't have the same width.
209 if (c1->width == NL80211_CHAN_WIDTH_5 ||
210 c1->width == NL80211_CHAN_WIDTH_10 ||
211 c2->width == NL80211_CHAN_WIDTH_5 ||
212 c2->width == NL80211_CHAN_WIDTH_10)
215 if (c1->width == NL80211_CHAN_WIDTH_20_NOHT ||
216 c1->width == NL80211_CHAN_WIDTH_20)
219 if (c2->width == NL80211_CHAN_WIDTH_20_NOHT ||
220 c2->width == NL80211_CHAN_WIDTH_20)
223 chandef_primary_freqs(c1, &c1_pri40, &c1_pri80);
224 chandef_primary_freqs(c2, &c2_pri40, &c2_pri80);
226 if (c1_pri40 != c2_pri40)
229 WARN_ON(!c1_pri80 && !c2_pri80);
230 if (c1_pri80 && c2_pri80 && c1_pri80 != c2_pri80)
233 if (c1->width > c2->width)
237 EXPORT_SYMBOL(cfg80211_chandef_compatible);
239 static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq,
241 enum nl80211_dfs_state dfs_state)
243 struct ieee80211_channel *c;
246 for (freq = center_freq - bandwidth/2 + 10;
247 freq <= center_freq + bandwidth/2 - 10;
249 c = ieee80211_get_channel(wiphy, freq);
250 if (!c || !(c->flags & IEEE80211_CHAN_RADAR))
253 c->dfs_state = dfs_state;
254 c->dfs_state_entered = jiffies;
258 void cfg80211_set_dfs_state(struct wiphy *wiphy,
259 const struct cfg80211_chan_def *chandef,
260 enum nl80211_dfs_state dfs_state)
264 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
267 width = cfg80211_chandef_get_width(chandef);
271 cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1,
274 if (!chandef->center_freq2)
276 cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2,
280 static u32 cfg80211_get_start_freq(u32 center_freq,
286 start_freq = center_freq;
288 start_freq = center_freq - bandwidth/2 + 10;
293 static u32 cfg80211_get_end_freq(u32 center_freq,
299 end_freq = center_freq;
301 end_freq = center_freq + bandwidth/2 - 10;
306 static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,
310 struct ieee80211_channel *c;
311 u32 freq, start_freq, end_freq;
313 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
314 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
316 for (freq = start_freq; freq <= end_freq; freq += 20) {
317 c = ieee80211_get_channel(wiphy, freq);
321 if (c->flags & IEEE80211_CHAN_RADAR)
328 int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
329 const struct cfg80211_chan_def *chandef,
330 enum nl80211_iftype iftype)
335 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
339 case NL80211_IFTYPE_ADHOC:
340 case NL80211_IFTYPE_AP:
341 case NL80211_IFTYPE_P2P_GO:
342 case NL80211_IFTYPE_MESH_POINT:
343 width = cfg80211_chandef_get_width(chandef);
347 ret = cfg80211_get_chans_dfs_required(wiphy,
348 chandef->center_freq1,
353 return BIT(chandef->width);
355 if (!chandef->center_freq2)
358 ret = cfg80211_get_chans_dfs_required(wiphy,
359 chandef->center_freq2,
364 return BIT(chandef->width);
367 case NL80211_IFTYPE_STATION:
368 case NL80211_IFTYPE_P2P_CLIENT:
369 case NL80211_IFTYPE_MONITOR:
370 case NL80211_IFTYPE_AP_VLAN:
371 case NL80211_IFTYPE_WDS:
372 case NL80211_IFTYPE_P2P_DEVICE:
374 case NL80211_IFTYPE_UNSPECIFIED:
375 case NUM_NL80211_IFTYPES:
381 EXPORT_SYMBOL(cfg80211_chandef_dfs_required);
383 static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy,
387 struct ieee80211_channel *c;
388 u32 freq, start_freq, end_freq;
391 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
392 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
395 * Check entire range of channels for the bandwidth.
396 * Check all channels are DFS channels (DFS_USABLE or
397 * DFS_AVAILABLE). Return number of usable channels
398 * (require CAC). Allow DFS and non-DFS channel mix.
400 for (freq = start_freq; freq <= end_freq; freq += 20) {
401 c = ieee80211_get_channel(wiphy, freq);
405 if (c->flags & IEEE80211_CHAN_DISABLED)
408 if (c->flags & IEEE80211_CHAN_RADAR) {
409 if (c->dfs_state == NL80211_DFS_UNAVAILABLE)
412 if (c->dfs_state == NL80211_DFS_USABLE)
420 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
421 const struct cfg80211_chan_def *chandef)
426 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
429 width = cfg80211_chandef_get_width(chandef);
433 r1 = cfg80211_get_chans_dfs_usable(wiphy, chandef->center_freq1,
439 switch (chandef->width) {
440 case NL80211_CHAN_WIDTH_80P80:
441 WARN_ON(!chandef->center_freq2);
442 r2 = cfg80211_get_chans_dfs_usable(wiphy,
443 chandef->center_freq2,
449 WARN_ON(chandef->center_freq2);
453 return (r1 + r2 > 0);
457 static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy,
461 struct ieee80211_channel *c;
462 u32 freq, start_freq, end_freq;
464 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
465 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
468 * Check entire range of channels for the bandwidth.
469 * If any channel in between is disabled or has not
470 * had gone through CAC return false
472 for (freq = start_freq; freq <= end_freq; freq += 20) {
473 c = ieee80211_get_channel(wiphy, freq);
477 if (c->flags & IEEE80211_CHAN_DISABLED)
480 if ((c->flags & IEEE80211_CHAN_RADAR) &&
481 (c->dfs_state != NL80211_DFS_AVAILABLE))
488 static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy,
489 const struct cfg80211_chan_def *chandef)
494 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
497 width = cfg80211_chandef_get_width(chandef);
501 r = cfg80211_get_chans_dfs_available(wiphy, chandef->center_freq1,
504 /* If any of channels unavailable for cf1 just return */
508 switch (chandef->width) {
509 case NL80211_CHAN_WIDTH_80P80:
510 WARN_ON(!chandef->center_freq2);
511 r = cfg80211_get_chans_dfs_available(wiphy,
512 chandef->center_freq2,
515 WARN_ON(chandef->center_freq2);
522 static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy,
526 struct ieee80211_channel *c;
527 u32 start_freq, end_freq, freq;
528 unsigned int dfs_cac_ms = 0;
530 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
531 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
533 for (freq = start_freq; freq <= end_freq; freq += 20) {
534 c = ieee80211_get_channel(wiphy, freq);
538 if (c->flags & IEEE80211_CHAN_DISABLED)
541 if (!(c->flags & IEEE80211_CHAN_RADAR))
544 if (c->dfs_cac_ms > dfs_cac_ms)
545 dfs_cac_ms = c->dfs_cac_ms;
552 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
553 const struct cfg80211_chan_def *chandef)
556 unsigned int t1 = 0, t2 = 0;
558 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
561 width = cfg80211_chandef_get_width(chandef);
565 t1 = cfg80211_get_chans_dfs_cac_time(wiphy,
566 chandef->center_freq1,
569 if (!chandef->center_freq2)
572 t2 = cfg80211_get_chans_dfs_cac_time(wiphy,
573 chandef->center_freq2,
579 static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy,
580 u32 center_freq, u32 bandwidth,
581 u32 prohibited_flags)
583 struct ieee80211_channel *c;
584 u32 freq, start_freq, end_freq;
586 start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
587 end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
589 for (freq = start_freq; freq <= end_freq; freq += 20) {
590 c = ieee80211_get_channel(wiphy, freq);
591 if (!c || c->flags & prohibited_flags)
598 bool cfg80211_chandef_usable(struct wiphy *wiphy,
599 const struct cfg80211_chan_def *chandef,
600 u32 prohibited_flags)
602 struct ieee80211_sta_ht_cap *ht_cap;
603 struct ieee80211_sta_vht_cap *vht_cap;
604 u32 width, control_freq;
606 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
609 ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap;
610 vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap;
612 control_freq = chandef->chan->center_freq;
614 switch (chandef->width) {
615 case NL80211_CHAN_WIDTH_5:
618 case NL80211_CHAN_WIDTH_10:
619 prohibited_flags |= IEEE80211_CHAN_NO_10MHZ;
622 case NL80211_CHAN_WIDTH_20:
623 if (!ht_cap->ht_supported)
625 case NL80211_CHAN_WIDTH_20_NOHT:
626 prohibited_flags |= IEEE80211_CHAN_NO_20MHZ;
629 case NL80211_CHAN_WIDTH_40:
631 if (!ht_cap->ht_supported)
633 if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
634 ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)
636 if (chandef->center_freq1 < control_freq &&
637 chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
639 if (chandef->center_freq1 > control_freq &&
640 chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
643 case NL80211_CHAN_WIDTH_80P80:
644 if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))
646 case NL80211_CHAN_WIDTH_80:
647 if (!vht_cap->vht_supported)
649 prohibited_flags |= IEEE80211_CHAN_NO_80MHZ;
652 case NL80211_CHAN_WIDTH_160:
653 if (!vht_cap->vht_supported)
655 if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ))
657 prohibited_flags |= IEEE80211_CHAN_NO_160MHZ;
666 * TODO: What if there are only certain 80/160/80+80 MHz channels
667 * allowed by the driver, or only certain combinations?
668 * For 40 MHz the driver can set the NO_HT40 flags, but for
669 * 80/160 MHz and in particular 80+80 MHz this isn't really
670 * feasible and we only have NO_80MHZ/NO_160MHZ so far but
671 * no way to cover 80+80 MHz or more complex restrictions.
672 * Note that such restrictions also need to be advertised to
673 * userspace, for example for P2P channel selection.
677 prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
679 /* 5 and 10 MHz are only defined for the OFDM PHY */
681 prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
684 if (!cfg80211_secondary_chans_ok(wiphy, chandef->center_freq1,
685 width, prohibited_flags))
688 if (!chandef->center_freq2)
690 return cfg80211_secondary_chans_ok(wiphy, chandef->center_freq2,
691 width, prohibited_flags);
693 EXPORT_SYMBOL(cfg80211_chandef_usable);
696 * For GO only, check if the channel can be used under permissive conditions
697 * mandated by the some regulatory bodies, i.e., the channel is marked with
698 * IEEE80211_CHAN_GO_CONCURRENT and there is an additional station interface
699 * associated to an AP on the same channel or on the same UNII band
700 * (assuming that the AP is an authorized master).
701 * In addition allow the GO to operate on a channel on which indoor operation is
702 * allowed, iff we are currently operating in an indoor environment.
704 static bool cfg80211_go_permissive_chan(struct cfg80211_registered_device *rdev,
705 struct ieee80211_channel *chan)
707 struct wireless_dev *wdev_iter;
708 struct wiphy *wiphy = wiphy_idx_to_wiphy(rdev->wiphy_idx);
712 if (!config_enabled(CONFIG_CFG80211_REG_RELAX_NO_IR) ||
713 !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR))
716 if (regulatory_indoor_allowed() &&
717 (chan->flags & IEEE80211_CHAN_INDOOR_ONLY))
720 if (!(chan->flags & IEEE80211_CHAN_GO_CONCURRENT))
724 * Generally, it is possible to rely on another device/driver to allow
725 * the GO concurrent relaxation, however, since the device can further
726 * enforce the relaxation (by doing a similar verifications as this),
727 * and thus fail the GO instantiation, consider only the interfaces of
728 * the current registered device.
730 list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
731 struct ieee80211_channel *other_chan = NULL;
734 if (wdev_iter->iftype != NL80211_IFTYPE_STATION ||
735 !netif_running(wdev_iter->netdev))
738 wdev_lock(wdev_iter);
739 if (wdev_iter->current_bss)
740 other_chan = wdev_iter->current_bss->pub.channel;
741 wdev_unlock(wdev_iter);
746 if (chan == other_chan)
749 if (chan->band != IEEE80211_BAND_5GHZ)
752 r1 = cfg80211_get_unii(chan->center_freq);
753 r2 = cfg80211_get_unii(other_chan->center_freq);
755 if (r1 != -EINVAL && r1 == r2) {
757 * At some locations channels 149-165 are considered a
758 * bundle, but at other locations, e.g., Indonesia,
759 * channels 149-161 are considered a bundle while
760 * channel 165 is left out and considered to be in a
761 * different bundle. Thus, in case that there is a
762 * station interface connected to an AP on channel 165,
763 * it is assumed that channels 149-161 are allowed for
764 * GO operations. However, having a station interface
765 * connected to an AP on channels 149-161, does not
766 * allow GO operation on channel 165.
768 if (chan->center_freq == 5825 &&
769 other_chan->center_freq != 5825)
778 bool cfg80211_reg_can_beacon(struct wiphy *wiphy,
779 struct cfg80211_chan_def *chandef,
780 enum nl80211_iftype iftype)
782 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
784 u32 prohibited_flags = IEEE80211_CHAN_DISABLED |
785 IEEE80211_CHAN_RADAR;
787 trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype);
790 * Under certain conditions suggested by the some regulatory bodies
791 * a GO can operate on channels marked with IEEE80211_NO_IR
792 * so set this flag only if such relaxations are not enabled and
793 * the conditions are not met.
795 if (iftype != NL80211_IFTYPE_P2P_GO ||
796 !cfg80211_go_permissive_chan(rdev, chandef->chan))
797 prohibited_flags |= IEEE80211_CHAN_NO_IR;
799 if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 &&
800 cfg80211_chandef_dfs_available(wiphy, chandef)) {
801 /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */
802 prohibited_flags = IEEE80211_CHAN_DISABLED;
805 res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags);
807 trace_cfg80211_return_bool(res);
810 EXPORT_SYMBOL(cfg80211_reg_can_beacon);
812 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
813 struct cfg80211_chan_def *chandef)
815 if (!rdev->ops->set_monitor_channel)
817 if (!cfg80211_has_monitors_only(rdev))
820 return rdev_set_monitor_channel(rdev, chandef);
824 cfg80211_get_chan_state(struct wireless_dev *wdev,
825 struct ieee80211_channel **chan,
826 enum cfg80211_chan_mode *chanmode,
832 *chanmode = CHAN_MODE_UNDEFINED;
834 ASSERT_WDEV_LOCK(wdev);
836 if (wdev->netdev && !netif_running(wdev->netdev))
839 switch (wdev->iftype) {
840 case NL80211_IFTYPE_ADHOC:
841 if (wdev->current_bss) {
842 *chan = wdev->current_bss->pub.channel;
843 *chanmode = (wdev->ibss_fixed &&
844 !wdev->ibss_dfs_possible)
846 : CHAN_MODE_EXCLUSIVE;
848 /* consider worst-case - IBSS can try to return to the
849 * original user-specified channel as creator */
850 if (wdev->ibss_dfs_possible)
851 *radar_detect |= BIT(wdev->chandef.width);
855 case NL80211_IFTYPE_STATION:
856 case NL80211_IFTYPE_P2P_CLIENT:
857 if (wdev->current_bss) {
858 *chan = wdev->current_bss->pub.channel;
859 *chanmode = CHAN_MODE_SHARED;
863 case NL80211_IFTYPE_AP:
864 case NL80211_IFTYPE_P2P_GO:
865 if (wdev->cac_started) {
866 *chan = wdev->chandef.chan;
867 *chanmode = CHAN_MODE_SHARED;
868 *radar_detect |= BIT(wdev->chandef.width);
869 } else if (wdev->beacon_interval) {
870 *chan = wdev->chandef.chan;
871 *chanmode = CHAN_MODE_SHARED;
873 ret = cfg80211_chandef_dfs_required(wdev->wiphy,
878 *radar_detect |= BIT(wdev->chandef.width);
881 case NL80211_IFTYPE_MESH_POINT:
882 if (wdev->mesh_id_len) {
883 *chan = wdev->chandef.chan;
884 *chanmode = CHAN_MODE_SHARED;
886 ret = cfg80211_chandef_dfs_required(wdev->wiphy,
891 *radar_detect |= BIT(wdev->chandef.width);
894 case NL80211_IFTYPE_MONITOR:
895 case NL80211_IFTYPE_AP_VLAN:
896 case NL80211_IFTYPE_WDS:
897 case NL80211_IFTYPE_P2P_DEVICE:
898 /* these interface types don't really have a channel */
900 case NL80211_IFTYPE_UNSPECIFIED:
901 case NUM_NL80211_IFTYPES: