Subject: [PATCH 1/6] ieee80211: Fix TKIP MIC calculation for QoS frames

From: Zhu Yi <[email-masked]>
Date: Thu, 13 Apr 2006 17:17:06 +0800

Fix TKIP MIC verification failure when receiving QoS frames from AP.

Signed-off-by: Hong Liu <[email-masked]>
Signed-off-by: Zhu Yi <[email-masked]>

---

 include/net/ieee80211.h              |    3 +++
 net/ieee80211/ieee80211_crypt_tkip.c |   11 ++++++++++-
 2 files changed, 13 insertions(+), 1 deletions(-)

2a0ee963da3c8a125e2af4dec07aca8bf4357d03
diff --git a/include/net/ieee80211.h b/include/net/ieee80211.h
index 4725ff8..66dc136 100644
--- a/include/net/ieee80211.h
+++ b/include/net/ieee80211.h
@@ -104,6 +104,9 @@
 #define IEEE80211_SCTL_FRAG		0x000F
 #define IEEE80211_SCTL_SEQ		0xFFF0
 
+/* QOS control */
+#define IEEE80211_QCTL_TID		0x000F
+
 /* debug macros */
 
 #ifdef CONFIG_IEEE80211_DEBUG
diff --git a/net/ieee80211/ieee80211_crypt_tkip.c b/net/ieee80211/ieee80211_crypt_tkip.c
index 93def94..3fa5df2 100644
--- a/net/ieee80211/ieee80211_crypt_tkip.c
+++ b/net/ieee80211/ieee80211_crypt_tkip.c
@@ -501,8 +501,11 @@ static int michael_mic(struct ieee80211_
 static void michael_mic_hdr(struct sk_buff *skb, u8 * hdr)
 {
 	struct ieee80211_hdr_4addr *hdr11;
+	u16 stype;
 
 	hdr11 = (struct ieee80211_hdr_4addr *)skb->data;
+	stype  = WLAN_FC_GET_STYPE(le16_to_cpu(hdr11->frame_ctl));
+
 	switch (le16_to_cpu(hdr11->frame_ctl) &
 		(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 	case IEEE80211_FCTL_TODS:
@@ -523,7 +526,13 @@ static void michael_mic_hdr(struct sk_bu
 		break;
 	}
 
-	hdr[12] = 0;		/* priority */
+	if (stype & IEEE80211_STYPE_QOS_DATA) {
+		const struct ieee80211_hdr_3addrqos *qoshdr =
+			(struct ieee80211_hdr_3addrqos *)skb->data;
+		hdr[12] = le16_to_cpu(qoshdr->qos_ctl) & IEEE80211_QCTL_TID;
+	} else
+		hdr[12] = 0;		/* priority */
+
 	hdr[13] = hdr[14] = hdr[15] = 0;	/* reserved */
 }
 
-- 
1.2.6