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Commit b4932836 authored by Janusz Dziedzic's avatar Janusz Dziedzic Committed by Johannes Berg
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mac80211: allow tx via monitor iface when DFS 



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: default avatarJanusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent b7ffbd7e

net/mac80211/tx.c

+6 −5
Original line number Diff line number Diff line
@@ -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;