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authorJohn W. Linville <linville@tuxdriver.com>2007-08-28 17:01:55 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 19:48:56 -0400
commitb331615722779b078822988843ddffd4eaec9f83 (patch)
tree81f9dd70c82e7fab1502aa7d79e971c004b0532d /net/mac80211
parent3c3b00caf98e5fdaa0184026a68f0008a5bf393e (diff)
[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: John W. Linville <linville@tuxdriver.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Michael Wu <flamingice@sourmilk.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/rx.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index e2c6f5cd1cf7..969be3adda7a 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -988,9 +988,10 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
988 memcpy(dst, hdr->addr1, ETH_ALEN); 988 memcpy(dst, hdr->addr1, ETH_ALEN);
989 memcpy(src, hdr->addr3, ETH_ALEN); 989 memcpy(src, hdr->addr3, ETH_ALEN);
990 990
991 if (sdata->type != IEEE80211_IF_TYPE_STA) { 991 if (sdata->type != IEEE80211_IF_TYPE_STA ||
992 (is_multicast_ether_addr(dst) &&
993 !compare_ether_addr(src, dev->dev_addr)))
992 return TXRX_DROP; 994 return TXRX_DROP;
993 }
994 break; 995 break;
995 case 0: 996 case 0:
996 /* DA SA BSSID */ 997 /* DA SA BSSID */