diff options
Diffstat (limited to 'net/wireless/chan.c')
| -rw-r--r-- | net/wireless/chan.c | 92 |
1 files changed, 63 insertions, 29 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c index bf2dfd54ff3..b5f69831e31 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -44,7 +44,7 @@ void cfg80211_chandef_create(struct cfg80211_chan_def *chandef, } EXPORT_SYMBOL(cfg80211_chandef_create); -bool cfg80211_chan_def_valid(const struct cfg80211_chan_def *chandef) +bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) { u32 control_freq; @@ -105,6 +105,7 @@ bool cfg80211_chan_def_valid(const struct cfg80211_chan_def *chandef) return true; } +EXPORT_SYMBOL(cfg80211_chandef_valid); static void chandef_primary_freqs(const struct cfg80211_chan_def *c, int *pri40, int *pri80) @@ -187,9 +188,9 @@ cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, } EXPORT_SYMBOL(cfg80211_chandef_compatible); -bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, - u32 center_freq, u32 bandwidth, - u32 prohibited_flags) +static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, + u32 center_freq, u32 bandwidth, + u32 prohibited_flags) { struct ieee80211_channel *c; u32 freq; @@ -205,55 +206,88 @@ bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, return true; } -static bool cfg80211_check_beacon_chans(struct wiphy *wiphy, - u32 center_freq, u32 bw) +bool cfg80211_chandef_usable(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef, + u32 prohibited_flags) { - return cfg80211_secondary_chans_ok(wiphy, center_freq, bw, - IEEE80211_CHAN_DISABLED | - IEEE80211_CHAN_PASSIVE_SCAN | - IEEE80211_CHAN_NO_IBSS | - IEEE80211_CHAN_RADAR); -} + struct ieee80211_sta_ht_cap *ht_cap; + struct ieee80211_sta_vht_cap *vht_cap; + u32 width, control_freq; -bool cfg80211_reg_can_beacon(struct wiphy *wiphy, - struct cfg80211_chan_def *chandef) -{ - u32 width; - bool res; + if (WARN_ON(!cfg80211_chandef_valid(chandef))) + return false; - trace_cfg80211_reg_can_beacon(wiphy, chandef); + ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; + vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; - if (WARN_ON(!cfg80211_chan_def_valid(chandef))) { - trace_cfg80211_return_bool(false); - return false; - } + control_freq = chandef->chan->center_freq; switch (chandef->width) { - case NL80211_CHAN_WIDTH_20_NOHT: case NL80211_CHAN_WIDTH_20: + if (!ht_cap->ht_supported) + return false; + case NL80211_CHAN_WIDTH_20_NOHT: width = 20; break; case NL80211_CHAN_WIDTH_40: width = 40; + if (!ht_cap->ht_supported) + return false; + if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || + ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) + return false; + if (chandef->center_freq1 < control_freq && + chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) + return false; + if (chandef->center_freq1 > control_freq && + chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) + return false; break; - case NL80211_CHAN_WIDTH_80: case NL80211_CHAN_WIDTH_80P80: + if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)) + return false; + case NL80211_CHAN_WIDTH_80: + if (!vht_cap->vht_supported) + return false; width = 80; break; case NL80211_CHAN_WIDTH_160: + if (!vht_cap->vht_supported) + return false; + if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)) + return false; width = 160; break; default: WARN_ON_ONCE(1); - trace_cfg80211_return_bool(false); return false; } - res = cfg80211_check_beacon_chans(wiphy, chandef->center_freq1, width); + /* TODO: missing regulatory check on 80/160 bandwidth */ + + if (!cfg80211_secondary_chans_ok(wiphy, chandef->center_freq1, + width, prohibited_flags)) + return false; + + if (!chandef->center_freq2) + return true; + return cfg80211_secondary_chans_ok(wiphy, chandef->center_freq2, + width, prohibited_flags); +} +EXPORT_SYMBOL(cfg80211_chandef_usable); + +bool cfg80211_reg_can_beacon(struct wiphy *wiphy, + struct cfg80211_chan_def *chandef) +{ + bool res; + + trace_cfg80211_reg_can_beacon(wiphy, chandef); - if (res && chandef->center_freq2) - res = cfg80211_check_beacon_chans(wiphy, chandef->center_freq2, - width); + res = cfg80211_chandef_usable(wiphy, chandef, + IEEE80211_CHAN_DISABLED | + IEEE80211_CHAN_PASSIVE_SCAN | + IEEE80211_CHAN_NO_IBSS | + IEEE80211_CHAN_RADAR); trace_cfg80211_return_bool(res); return res; |