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authorJohannes Berg <johannes@sipsolutions.net>2008-07-10 10:11:02 +0200
committerJohn W. Linville <linville@tuxdriver.com>2008-07-14 14:52:57 -0400
commit1411f9b531f0a910cd1c85a337737c1e6ffbae6a (patch)
treef39bd48a6a3163b913dd165167a8a16dd64b054f /net/mac80211
parent2560b6e2e4b87df211ea39b3b02498959b70b4e8 (diff)
mac80211: fix RX sequence number check
According to 802.11-2007, we are doing the wrong thing in the sequence number checks when receiving frames. This fixes it. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/rx.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index ba332c9dc19a..6d9ae67c27ca 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -334,13 +334,18 @@ static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
else
rx->flags &= ~IEEE80211_RX_AMSDU;
} else {
- if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
- /* Separate TID for management frames */
- tid = NUM_RX_DATA_QUEUES - 1;
- } else {
- /* no qos control present */
- tid = 0; /* 802.1d - Best Effort */
- }
+ /*
+ * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
+ *
+ * Sequence numbers for management frames, QoS data
+ * frames with a broadcast/multicast address in the
+ * Address 1 field, and all non-QoS data frames sent
+ * by QoS STAs are assigned using an additional single
+ * modulo-4096 counter, [...]
+ *
+ * We also use that counter for non-QoS STAs.
+ */
+ tid = NUM_RX_DATA_QUEUES - 1;
}
rx->queue = tid;