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[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>
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1 changed files with 3 additions and 2 deletions
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@ -988,9 +988,10 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
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memcpy(dst, hdr->addr1, ETH_ALEN);
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memcpy(src, hdr->addr3, ETH_ALEN);
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if (sdata->type != IEEE80211_IF_TYPE_STA) {
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if (sdata->type != IEEE80211_IF_TYPE_STA ||
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(is_multicast_ether_addr(dst) &&
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!compare_ether_addr(src, dev->dev_addr)))
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return TXRX_DROP;
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}
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break;
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case 0:
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/* DA SA BSSID */
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