X-Git-Url: https://jxself.org/git/?p=carl9170fw.git;a=blobdiff_plain;f=include%2Flinux%2Fieee80211.h;h=1ec899d08031878f9c8388ed53ddb5ee35005d5a;hp=5c88243c7898ce53e8747bca37dc1441f0839a07;hb=refs%2Fheads%2Fmaster;hpb=21cd4007928a58c393bbdf263eb3c41388aa6bda

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 5c88243..1ec899d 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -786,20 +786,6 @@ static inline bool ieee80211_is_any_nullfunc(__le16 fc)
 	return (ieee80211_is_nullfunc(fc) || ieee80211_is_qos_nullfunc(fc));
 }
 
-/**
- * ieee80211_is_bufferable_mmpdu - check if frame is bufferable MMPDU
- * @fc: frame control field in little-endian byteorder
- */
-static inline bool ieee80211_is_bufferable_mmpdu(__le16 fc)
-{
-	/* IEEE 802.11-2012, definition of "bufferable management frame";
-	 * note that this ignores the IBSS special case. */
-	return ieee80211_is_mgmt(fc) &&
-	       (ieee80211_is_action(fc) ||
-		ieee80211_is_disassoc(fc) ||
-		ieee80211_is_deauth(fc));
-}
-
 /**
  * ieee80211_is_first_frag - check if IEEE80211_SCTL_FRAG is not set
  * @seq_ctrl: frame sequence control bytes in little-endian byteorder
@@ -4132,6 +4118,44 @@ static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
 	return hdr->addr2;
 }
 
+/**
+ * ieee80211_is_bufferable_mmpdu - check if frame is bufferable MMPDU
+ * @skb: the skb to check, starting with the 802.11 header
+ */
+static inline bool ieee80211_is_bufferable_mmpdu(struct ieee80211_hdr *hdr, size_t len)
+{
+	struct ieee80211_mgmt *mgmt = (void *)hdr;
+	__le16 fc = mgmt->frame_control;
+
+	/*
+	 * IEEE 802.11 REVme D2.0 definition of bufferable MMPDU;
+	 * note that this ignores the IBSS special case.
+	 */
+	if (!ieee80211_is_mgmt(fc))
+		return false;
+
+	if (ieee80211_is_disassoc(fc) || ieee80211_is_deauth(fc))
+		return true;
+
+	if (!ieee80211_is_action(fc))
+		return false;
+
+	if (len < offsetofend(typeof(*mgmt), u.action.u.ftm.action_code))
+		return true;
+
+	/* action frame - additionally check for non-bufferable FTM */
+
+	if (mgmt->u.action.category != WLAN_CATEGORY_PUBLIC &&
+	    mgmt->u.action.category != WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION)
+		return true;
+
+	if (mgmt->u.action.u.ftm.action_code == WLAN_PUB_ACTION_FTM_REQUEST ||
+	    mgmt->u.action.u.ftm.action_code == WLAN_PUB_ACTION_FTM_RESPONSE)
+		return false;
+
+	return true;
+}
+
 /**
  * ieee80211_get_DA - get pointer to DA
  * @hdr: the frame