Follow IEEE 802.11-21 that HTC subfield masked to 0 for all data frames
containing a QoS Control field. It also defines the AAD length depends on
QC and A4 fields, so change logic to determine length accordingly.
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
---
net/mac80211/wpa.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 7ed0d268aff2f..cd35ae76d5b78 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -317,13 +317,12 @@ static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad)
__le16 mask_fc;
int a4_included, mgmt;
u8 qos_tid;
- u16 len_a;
- unsigned int hdrlen;
+ u16 len_a = 22;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
/*
* Mask FC: zero subtype b4 b5 b6 (if not mgmt)
- * Retry, PwrMgt, MoreData; set Protected
+ * Retry, PwrMgt, MoreData, Order (if Qos Data); set Protected
*/
mgmt = ieee80211_is_mgmt(hdr->frame_control);
mask_fc = hdr->frame_control;
@@ -333,14 +332,17 @@ static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad)
mask_fc &= ~cpu_to_le16(0x0070);
mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
- len_a = hdrlen - 2;
a4_included = ieee80211_has_a4(hdr->frame_control);
+ if (a4_included)
+ len_a += 6;
- if (ieee80211_is_data_qos(hdr->frame_control))
+ if (ieee80211_is_data_qos(hdr->frame_control)) {
qos_tid = ieee80211_get_tid(hdr);
- else
+ mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_ORDER);
+ len_a += 2;
+ } else {
qos_tid = 0;
+ }
/* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
* mode authentication are not allowed to collide, yet both are derived
--
2.25.1
