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mac80211: don't inspect Sequence Control field on control frames

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Per IEEE Std. 802.11-2012, Sec 8.2.4.4.1, the sequence Control field is
not present in control frames.  We noticed this problem when processing
Block Ack Requests.

Cc: stable@vger.kernel.org
Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: Javier Lopez <jlopex@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Javier Cardona 2012-10-25 11:10:18 -07:00 committed by Johannes Berg
parent 2ac64cd17f
commit f7fbf70ee9
1 changed files with 4 additions and 0 deletions
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4
net/mac80211/rx.c
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@ -1462,6 +1462,10 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
hdr = (struct ieee80211_hdr *)rx->skb->data; hdr = (struct ieee80211_hdr *)rx->skb->data;
fc = hdr->frame_control; fc = hdr->frame_control;
if (ieee80211_is_ctl(fc))
return RX_CONTINUE;
sc = le16_to_cpu(hdr->seq_ctrl); sc = le16_to_cpu(hdr->seq_ctrl);
frag = sc & IEEE80211_SCTL_FRAG; frag = sc & IEEE80211_SCTL_FRAG;