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--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1556,17 +1556,36 @@ __ieee80211_data_to_8023(struct ieee8021
{
struct ieee80211_sub_if_data *sdata = rx->sdata;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+ bool check_port_control = false;
+ struct ethhdr *ehdr;
+ int ret;
if (ieee80211_has_a4(hdr->frame_control) &&
sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
return -1;
+ if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+ !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
+
+ if (!sdata->u.mgd.use_4addr)
+ return -1;
+ else
+ check_port_control = true;
+ }
+
if (is_multicast_ether_addr(hdr->addr1) &&
- ((sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) ||
- (sdata->vif.type == NL80211_IFTYPE_STATION && sdata->u.mgd.use_4addr)))
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
+ return -1;
+
+ ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
+ if (ret < 0 || !check_port_control)
+ return ret;
+
+ ehdr = (struct ethhdr *) rx->skb->data;
+ if (ehdr->h_proto != rx->sdata->control_port_protocol)
return -1;
- return ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
+ return 0;
}
/*
|
