iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

wil6210: drop Rx multicast packets that are looped-back to STA

Browse Source 
Delivering a looped-back multicast packet to network stack can cause
higher layer protocols to fail like for example IPv6 DAD.
In STA mode, upon receiving Rx multicast packet, check if the source
MAC address is equal to our own MAC address and if so drop the packet.

Signed-off-by: Dedy Lansky <dlansky@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Dedy Lansky 2018-08-23 14:47:07 +03:00 committed by Kalle Valo
parent 22b9610ec6
commit 9a65064abd
1 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/wireless/ath/wil6210/txrx.c
View File

@ -765,7 +765,14 @@ void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev)
return;
}
if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) {
if (wdev->iftype == NL80211_IFTYPE_STATION) {
if (mcast && ether_addr_equal(eth->h_source, ndev->dev_addr)) {
/* mcast packet looped back to us */
rc = GRO_DROP;
dev_kfree_skb(skb);
goto stats;
}
} else if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) {
if (mcast) {
/* send multicast frames both to higher layers in
* local net stack and back to the wireless medium