+static void ieee80211_iface_process_skb(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb)
+{
+ struct ieee80211_mgmt *mgmt = (void *)skb->data;
+
+ if (ieee80211_is_action(mgmt->frame_control) &&
+ mgmt->u.action.category == WLAN_CATEGORY_BACK) {
+ struct sta_info *sta;
+ int len = skb->len;
+
+ mutex_lock(&local->sta_mtx);
+ sta = sta_info_get_bss(sdata, mgmt->sa);
+ if (sta) {
+ switch (mgmt->u.action.u.addba_req.action_code) {
+ case WLAN_ACTION_ADDBA_REQ:
+ ieee80211_process_addba_request(local, sta,
+ mgmt, len);
+ break;
+ case WLAN_ACTION_ADDBA_RESP:
+ ieee80211_process_addba_resp(local, sta,
+ mgmt, len);
+ break;
+ case WLAN_ACTION_DELBA:
+ ieee80211_process_delba(sdata, sta,
+ mgmt, len);
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ }
+ mutex_unlock(&local->sta_mtx);
+ } else if (ieee80211_is_action(mgmt->frame_control) &&
+ mgmt->u.action.category == WLAN_CATEGORY_VHT) {
+ switch (mgmt->u.action.u.vht_group_notif.action_code) {
+ case WLAN_VHT_ACTION_OPMODE_NOTIF: {
+ struct ieee80211_rx_status *status;
+ enum nl80211_band band;
+ struct sta_info *sta;
+ u8 opmode;
+
+ status = IEEE80211_SKB_RXCB(skb);
+ band = status->band;
+ opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
+
+ mutex_lock(&local->sta_mtx);
+ sta = sta_info_get_bss(sdata, mgmt->sa);
+
+ if (sta)
+ ieee80211_vht_handle_opmode(sdata, sta, opmode,
+ band);
+
+ mutex_unlock(&local->sta_mtx);
+ break;
+ }
+ case WLAN_VHT_ACTION_GROUPID_MGMT:
+ ieee80211_process_mu_groups(sdata, mgmt);
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ } else if (ieee80211_is_ext(mgmt->frame_control)) {
+ if (sdata->vif.type == NL80211_IFTYPE_STATION)
+ ieee80211_sta_rx_queued_ext(sdata, skb);
+ else
+ WARN_ON(1);
+ } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
+ struct ieee80211_hdr *hdr = (void *)mgmt;
+ struct sta_info *sta;
+
+ /*
+ * So the frame isn't mgmt, but frame_control
+ * is at the right place anyway, of course, so
+ * the if statement is correct.
+ *
+ * Warn if we have other data frame types here,
+ * they must not get here.
+ */
+ WARN_ON(hdr->frame_control &
+ cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
+ WARN_ON(!(hdr->seq_ctrl &
+ cpu_to_le16(IEEE80211_SCTL_FRAG)));
+ /*
+ * This was a fragment of a frame, received while
+ * a block-ack session was active. That cannot be
+ * right, so terminate the session.
+ */
+ mutex_lock(&local->sta_mtx);
+ sta = sta_info_get_bss(sdata, mgmt->sa);
+ if (sta) {
+ u16 tid = ieee80211_get_tid(hdr);
+
+ __ieee80211_stop_rx_ba_session(
+ sta, tid, WLAN_BACK_RECIPIENT,
+ WLAN_REASON_QSTA_REQUIRE_SETUP,
+ true);
+ }
+ mutex_unlock(&local->sta_mtx);
+ } else switch (sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ ieee80211_sta_rx_queued_mgmt(sdata, skb);
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ ieee80211_ibss_rx_queued_mgmt(sdata, skb);
+ break;
+ case NL80211_IFTYPE_MESH_POINT:
+ if (!ieee80211_vif_is_mesh(&sdata->vif))
+ break;
+ ieee80211_mesh_rx_queued_mgmt(sdata, skb);
+ break;
+ default:
+ WARN(1, "frame for unexpected interface type");
+ break;
+ }
+}
+