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authorJohannes Berg <johannes.berg@intel.com>2011-11-04 11:18:20 +0100
committerJohn W. Linville <linville@tuxdriver.com>2011-11-09 16:13:53 -0500
commite7f4a940bb5eecd07cf0039e7d9201badc332ae0 (patch)
tree49ae5164a9f2f247a6c33d24f27033e1db2f5ba5 /net/mac80211/rx.c
parentb92ab5d86dafc2b3733c5fdd5def40c8fe7ea7c9 (diff)
mac80211: send unexpected 4addr event
Implement the cfg80211 notification but only send one event per associated station to avoid having tons of events if the station thinks it should be allowed to use 4addr frames but it isn't. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/rx.c')
-rw-r--r--net/mac80211/rx.c24
1 files changed, 17 insertions, 7 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 2ed882f8a9f8..5f6751a07405 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1342,15 +1342,20 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
/*
* If we receive a 4-addr nullfunc frame from a STA
- * that was not moved to a 4-addr STA vlan yet, drop
- * the frame to the monitor interface, to make sure
- * that hostapd sees it
+ * that was not moved to a 4-addr STA vlan yet send
+ * the event to userspace and for older hostapd drop
+ * the frame to the monitor interface.
*/
if (ieee80211_has_a4(hdr->frame_control) &&
(rx->sdata->vif.type == NL80211_IFTYPE_AP ||
(rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
- !rx->sdata->u.vlan.sta)))
+ !rx->sdata->u.vlan.sta))) {
+ if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT))
+ cfg80211_rx_unexpected_4addr_frame(
+ rx->sdata->dev, sta->sta.addr,
+ GFP_ATOMIC);
return RX_DROP_MONITOR;
+ }
/*
* Update counter and free packet here to avoid
* counting this as a dropped packed.
@@ -2028,12 +2033,17 @@ ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
return RX_DROP_MONITOR;
/*
- * Allow the cooked monitor interface of an AP to see 4-addr frames so
- * that a 4-addr station can be detected and moved into a separate VLAN
+ * Send unexpected-4addr-frame event to hostapd. For older versions,
+ * also drop the frame to cooked monitor interfaces.
*/
if (ieee80211_has_a4(hdr->frame_control) &&
- sdata->vif.type == NL80211_IFTYPE_AP)
+ sdata->vif.type == NL80211_IFTYPE_AP) {
+ if (rx->sta &&
+ !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT))
+ cfg80211_rx_unexpected_4addr_frame(
+ rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC);
return RX_DROP_MONITOR;
+ }
err = __ieee80211_data_to_8023(rx, &port_control);
if (unlikely(err))