mac80211: Encrypt "Group addressed privacy" action frames

[carl9170fw.git] / include / linux / ieee80211.h

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 4c5a283dbff4b3bb3906aabc4d03aa67c46fde14..4550eb7a3fd470943c090b27fd3a94d57a60b524 100644 (file)
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -159,6 +159,9 @@ static inline u16 ieee80211_sn_sub(u16 sn1, u16 sn2)
 /* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
 #define IEEE80211_MAX_FRAME_LEN                2352
 
+/* Maximal size of an A-MSDU that can be transported in a HT BA session */
+#define IEEE80211_MAX_MPDU_LEN_HT_BA           4095
+
 /* Maximal size of an A-MSDU */
 #define IEEE80211_MAX_MPDU_LEN_HT_3839         3839
 #define IEEE80211_MAX_MPDU_LEN_HT_7935         7935
@@ -2488,6 +2491,35 @@ static inline bool ieee80211_is_public_action(struct ieee80211_hdr *hdr,
        return mgmt->u.action.category == WLAN_CATEGORY_PUBLIC;
 }
 
+/**
+ * _ieee80211_is_group_privacy_action - check if frame is a group addressed
+ * privacy action frame
+ * @hdr: the frame
+ */
+static inline bool _ieee80211_is_group_privacy_action(struct ieee80211_hdr *hdr)
+{
+       struct ieee80211_mgmt *mgmt = (void *)hdr;
+
+       if (!ieee80211_is_action(hdr->frame_control) ||
+           !is_multicast_ether_addr(hdr->addr1))
+               return false;
+
+       return mgmt->u.action.category == WLAN_CATEGORY_MESH_ACTION ||
+              mgmt->u.action.category == WLAN_CATEGORY_MULTIHOP_ACTION;
+}
+
+/**
+ * ieee80211_is_group_privacy_action - check if frame is a group addressed
+ * privacy action frame
+ * @skb: the skb containing the frame, length will be checked
+ */
+static inline bool ieee80211_is_group_privacy_action(struct sk_buff *skb)
+{
+       if (skb->len < IEEE80211_MIN_ACTION_SIZE)
+               return false;
+       return _ieee80211_is_group_privacy_action((void *)skb->data);
+}
+
 /**
  * ieee80211_tu_to_usec - convert time units (TU) to microseconds
  * @tu: the TUs