Fix handling of devices w/o radiotap support:

o do not attach DLT_IEEE802_11_RADIO unless both tx and rx headers are
  present; this is assumed in the capture code paths
o verify the above with asserts in ieee80211_radiotap_{rx,tx}
o add missing checks for active taps before calling ieee80211_radiotap_rx

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/net80211/ieee80211_monitor.c b/sys/net80211/ieee80211_monitor.c
index 119c87d..3f2c847 100644
--- a/sys/net80211/ieee80211_monitor.c
+++ b/sys/net80211/ieee80211_monitor.c
@@ -128,7 +128,8 @@ monitor_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
 {
 	struct ieee80211vap *vap = ni->ni_vap;
 
-	ieee80211_radiotap_rx(vap, m);
+	if (ieee80211_radiotap_active_vap(vap))
+		ieee80211_radiotap_rx(vap, m);
 	m_freem(m);
 	return -1;
 }