Messages in this thread Patch in this message | | | Date | Wed, 31 Oct 2007 08:11:44 -0700 | From | Greg KH <> | Subject | [patch 13/26] mac80211: filter locally-originated multicast frames |
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2.6.22-stable review patch. If anyone has any objections, please let us know.
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From: John W. Linville <linville@tuxdriver.com>
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 <linville@tuxdriver.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Michael Wu <flamingice@sourmilk.net> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- net/mac80211/ieee80211.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/net/mac80211/ieee80211.c +++ b/net/mac80211/ieee80211.c @@ -2615,9 +2615,10 @@ ieee80211_rx_h_data(struct ieee80211_txr 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 */ -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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