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mac80211: TDLS: deny ch-switch req on disallowed channels

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If a TDLS station is not allowed to beacon on a channel, don't accept
a channel switch request to this channel.
Move channel building code up to avoid lockdep violations - reg_can_beacon
needs to take the wdev lock.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arik Nemtsov 2015-07-08 15:41:46 +03:00 committed by Johannes Berg
parent c8ff71e667
commit 42d8d78961
1 changed files with 31 additions and 18 deletions
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49
net/mac80211/tdls.c
View file

@ -1737,6 +1737,31 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
return -EINVAL;
}
if (!elems.sec_chan_offs) {
chan_type = NL80211_CHAN_HT20;
} else {
switch (elems.sec_chan_offs->sec_chan_offs) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
chan_type = NL80211_CHAN_HT40PLUS;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
chan_type = NL80211_CHAN_HT40MINUS;
break;
default:
chan_type = NL80211_CHAN_HT20;
break;
}
}
cfg80211_chandef_create(&chandef, chan, chan_type);
/* we will be active on the TDLS link */
if (!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &chandef,
sdata->wdev.iftype)) {
tdls_dbg(sdata, "TDLS chan switch to forbidden channel\n");
return -EINVAL;
}
mutex_lock(&local->sta_mtx);
sta = sta_info_get(sdata, tf->sa);
if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
@ -1757,27 +1782,15 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
goto out;
}
if (!sta->sta.ht_cap.ht_supported) {
chan_type = NL80211_CHAN_NO_HT;
} else if (!elems.sec_chan_offs) {
chan_type = NL80211_CHAN_HT20;
} else {
switch (elems.sec_chan_offs->sec_chan_offs) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
chan_type = NL80211_CHAN_HT40PLUS;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
chan_type = NL80211_CHAN_HT40MINUS;
break;
default:
chan_type = NL80211_CHAN_HT20;
break;
}
/* peer should have known better */
if (!sta->sta.ht_cap.ht_supported && elems.sec_chan_offs &&
elems.sec_chan_offs->sec_chan_offs) {
tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n");
ret = -ENOTSUPP;
goto out;
}
cfg80211_chandef_create(&chandef, chan, chan_type);
params.chandef = &chandef;
params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time);
params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout);