From 54b932c50865c707877ae954bae499e6539c37b5 Mon Sep 17 00:00:00 2001 From: "John W. Linville" Date: Tue, 9 Oct 2007 22:46:35 -0400 Subject: mac80211: filter locally-originated multicast frames patch b331615722779b078822988843ddffd4eaec9f83 in mainline. 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 Signed-off-by: Johannes Berg Acked-by: Michael Wu Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/mac80211/ieee80211.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c index 4e84f24fd439..42725e1cf7d3 100644 --- a/net/mac80211/ieee80211.c +++ b/net/mac80211/ieee80211.c @@ -2615,9 +2615,10 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx) memcpy(dst, hdr->addr1, 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; - } break; case 0: /* DA SA BSSID */ -- cgit v1.2.3