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mac80211: allow tx via monitor iface when DFS

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Allow send frames using monitor interface
when DFS chandef and we pass CAC (beaconing
allowed).

This fix problem when old kernel and new backports used,
in such case hostapd create/use also monitor interface.
Before this patch all frames hostapd send using monitor
iface were dropped when AP was configured on DFS channel.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Janusz Dziedzic 2014-06-05 08:12:57 +02:00 committed by Johannes Berg
parent b7ffbd7ef6
commit b49328361b
1 changed files with 6 additions and 5 deletions
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11
net/mac80211/tx.c
View file

@ -1620,12 +1620,12 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_chanctx_conf *chanctx_conf;
struct ieee80211_channel *chan;
struct ieee80211_radiotap_header *prthdr =
(struct ieee80211_radiotap_header *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr;
struct ieee80211_sub_if_data *tmp_sdata, *sdata;
struct cfg80211_chan_def *chandef;
u16 len_rthdr;
int hdrlen;
@ -1723,9 +1723,9 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
}
if (chanctx_conf)
chan = chanctx_conf->def.chan;
chandef = &chanctx_conf->def;
else if (!local->use_chanctx)
chan = local->_oper_chandef.chan;
chandef = &local->_oper_chandef;
else
goto fail_rcu;
@ -1745,10 +1745,11 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
* radar detection by itself. We can do that later by adding a
* monitor flag interfaces used for AP support.
*/
if ((chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR)))
if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
sdata->vif.type))
goto fail_rcu;
ieee80211_xmit(sdata, skb, chan->band);
ieee80211_xmit(sdata, skb, chandef->chan->band);
rcu_read_unlock();
return NETDEV_TX_OK;