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| author | John W. Linville <linville@tuxdriver.com> | 2007-08-28 17:01:55 -0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:48:56 -0700 |
| commit | b331615722779b078822988843ddffd4eaec9f83 (patch) | |
| tree | 81f9dd70c82e7fab1502aa7d79e971c004b0532d /net | |
| parent | 3c3b00caf98e5fdaa0184026a68f0008a5bf393e (diff) | |
| download | linux-3.10-b331615722779b078822988843ddffd4eaec9f83.tar.gz linux-3.10-b331615722779b078822988843ddffd4eaec9f83.tar.bz2 linux-3.10-b331615722779b078822988843ddffd4eaec9f83.zip | |
[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')
| -rw-r--r-- | net/mac80211/rx.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index e2c6f5cd1cf..969be3adda7 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -988,9 +988,10 @@ 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 */ |