Commit b3316157 authored by John W. Linville's avatar John W. Linville Committed by David S. Miller

[MAC80211]: filter locally-originated multicast frames

In STA mode, the AP will echo our traffic.  This includes multicast
traffic.

Receiving these frames confuses some protocols and applications,
notably IPv6 Duplicate Address Detection.
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Acked-by: default avatarMichael Wu <flamingice@sourmilk.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3c3b00ca
...@@ -988,9 +988,10 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx) ...@@ -988,9 +988,10 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
memcpy(dst, hdr->addr1, ETH_ALEN); memcpy(dst, hdr->addr1, ETH_ALEN);
memcpy(src, hdr->addr3, ETH_ALEN); memcpy(src, hdr->addr3, ETH_ALEN);
if (sdata->type != IEEE80211_IF_TYPE_STA) { if (sdata->type != IEEE80211_IF_TYPE_STA ||
(is_multicast_ether_addr(dst) &&
!compare_ether_addr(src, dev->dev_addr)))
return TXRX_DROP; return TXRX_DROP;
}
break; break;
case 0: case 0:
/* DA SA BSSID */ /* DA SA BSSID */
......
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