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Some odd APs send beacons on the same TX queue as non-beacons. This breaks

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802.11 duplicate detection. Upon looking at the standard, we discover
that 802.11-2007 says:
"A receiving QoS STA is also required to keep only the most recent
cache entry per<Address 2, TID, sequence-number>  triple, storing only
the most recently received fragment number for that triple. A receiving
STA may omit tuples obtained from broadcast/multicast or ATIM frames
from the cache."

To fix this, we just disable duplicate detection for multicast/broadcast
frames.

Reviewed by:	sam
MFC after:	4 weeks
Obtained from:	DragonFly
This commit is contained in:
rpaulo 2010-06-10 20:58:34 +00:00
parent 8d7910925e
commit 826b4773a0
1 changed files with 1 additions and 1 deletions
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2
sys/net80211/ieee80211_sta.c
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@ -584,7 +584,7 @@ sta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
}
IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
ni->ni_noise = nf;
if (HAS_SEQ(type)) {
if (HAS_SEQ(type) !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
uint8_t tid = ieee80211_gettid(wh);
if (IEEE80211_QOS_HAS_SEQ(wh) &&
TID_TO_WME_AC(tid) >= WME_AC_VI)