+ chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+ if (!chanctx_conf) {
+ tmp_sdata = rcu_dereference(local->monitor_sdata);
+ if (tmp_sdata)
+ chanctx_conf =
+ rcu_dereference(tmp_sdata->vif.chanctx_conf);
+ }
+ if (!chanctx_conf)
+ goto fail_rcu;
+
+ chan = chanctx_conf->channel;
+
+ /*
+ * Frame injection is not allowed if beaconing is not allowed
+ * or if we need radar detection. Beaconing is usually not allowed when
+ * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
+ * Passive scan is also used in world regulatory domains where
+ * your country is not known and as such it should be treated as
+ * NO TX unless the channel is explicitly allowed in which case
+ * your current regulatory domain would not have the passive scan
+ * flag.
+ *
+ * Since AP mode uses monitor interfaces to inject/TX management
+ * frames we can make AP mode the exception to this rule once it
+ * supports radar detection as its implementation can deal with
+ * 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_IBSS | IEEE80211_CHAN_RADAR |
+ IEEE80211_CHAN_PASSIVE_SCAN)))
+ goto fail_rcu;
+
+ ieee80211_xmit(sdata, skb, chan->band);