From d0dd2de0d055f0ffb1e2ecdc21380de9d12a85e2 Mon Sep 17 00:00:00 2001 From: Andriy Tkachuk Date: Wed, 20 Jan 2010 13:55:06 +0200 Subject: mac80211: Account HT Control field in Data frame hdrlen according to 802.11n-2009 ieee80211_hdrlen() should account account new HT Control field in 802.11 data frame header introduced by IEEE 802.11n standard. According to 802.11n-2009 HT Control field is present in data frames when both of following are met: 1. It is QoS data frame. 2. Order bit is set in Frame Control field. The change might be totally compatible with legacy non-11n aware frames, because 802.11-2007 standard states that "all QoS STAs set this subfield to 0". Signed-off-by: Andriy V. Tkachuk Acked-by : Benoit Papillault Signed-off-by: John W. Linville --- net/wireless/util.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'net/wireless/util.c') diff --git a/net/wireless/util.c b/net/wireless/util.c index 23557c1d0a9c..be2ab8c59e3a 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -227,8 +227,11 @@ unsigned int ieee80211_hdrlen(__le16 fc) if (ieee80211_is_data(fc)) { if (ieee80211_has_a4(fc)) hdrlen = 30; - if (ieee80211_is_data_qos(fc)) + if (ieee80211_is_data_qos(fc)) { hdrlen += IEEE80211_QOS_CTL_LEN; + if (ieee80211_has_order(fc)) + hdrlen += IEEE80211_HT_CTL_LEN; + } goto out; } -- cgit v1.2.1