+ /*
+ * For AP mode, hostapd is responsible for handling any action
+ * frames that we didn't handle, including returning unknown
+ * ones. For all other modes we will return them to the sender,
+ * setting the 0x80 bit in the action category, as required by
+ * 802.11-2007 7.3.1.11.
+ */
+ if (sdata->vif.type == NL80211_IFTYPE_AP ||
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ return RX_DROP_MONITOR;
+
+ /*
+ * Getting here means the kernel doesn't know how to handle
+ * it, but maybe userspace does ... include returned frames
+ * so userspace can register for those to know whether ones
+ * it transmitted were processed or returned.
+ */
+ status = IEEE80211_SKB_RXCB(rx->skb);
+
+ if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+ cfg80211_rx_action(rx->sdata->dev, status->freq,
+ rx->skb->data, rx->skb->len,
+ GFP_ATOMIC))
+ goto handled;
+
+ /* do not return rejected action frames */
+ if (mgmt->u.action.category & 0x80)
+ return RX_DROP_UNUSABLE;
+
+ nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0,
+ GFP_ATOMIC);
+ if (nskb) {
+ struct ieee80211_mgmt *mgmt = (void *)nskb->data;
+
+ mgmt->u.action.category |= 0x80;
+ memcpy(mgmt->da, mgmt->sa, ETH_ALEN);
+ memcpy(mgmt->sa, rx->sdata->vif.addr, ETH_ALEN);
+
+ memset(nskb->cb, 0, sizeof(nskb->cb));
+
+ ieee80211_tx_skb(rx->sdata, nskb);
+ }
+
+ handled:
+ if (rx->sta)
+ rx->sta->rx_packets++;