From: Christian Lamparter <chunkeey@googlemail.com>
Date: Sun, 16 Jan 2011 00:05:08 +0000 (+0100)
Subject: ieee80211: add ieee80211_hdrlen helper from cfg80211.h
X-Git-Tag: 1.9.3~20
X-Git-Url: https://jxself.org/git/?p=carl9170fw.git;a=commitdiff_plain;h=b844396830984319ab330abd1bcc47ebf651e581

ieee80211: add ieee80211_hdrlen helper from cfg80211.h

ieee80211_hdrlen is a non-standard extenstion,
therefore it has to go into a separate commit.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
---

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 112e859..e60b271 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -527,6 +527,22 @@ static inline int ieee80211_is_qos_nullfunc(__le16 fc)
 	       cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
 }
 
+static inline unsigned int ieee80211_hdrlen(__le16 fc)
+{
+	unsigned int hdrlen = 24;
+
+	if (ieee80211_has_a4(fc))
+		hdrlen = 30;
+
+	if (ieee80211_is_data_qos(fc)) {
+		hdrlen += IEEE80211_QOS_CTL_LEN;
+		if (ieee80211_has_order(fc))
+			hdrlen += IEEE80211_HT_CTL_LEN;
+	}
+
+        return hdrlen;
+}
+
 struct ieee80211s_hdr {
 	u8 flags;
 	u8 ttl;