mac80211: 802.11w - CCMP for management frames
Extend CCMP to support encryption and decryption of unicast management
frames.
Signed-off-by: Jouni Malinen <j@w1.fi>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index cade255..d516589 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1030,6 +1030,7 @@
WLAN_CATEGORY_QOS = 1,
WLAN_CATEGORY_DLS = 2,
WLAN_CATEGORY_BACK = 3,
+ WLAN_CATEGORY_PUBLIC = 4,
WLAN_CATEGORY_WMM = 17,
};
@@ -1186,6 +1187,35 @@
}
/**
+ * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
+ * @hdr: the frame (buffer must include at least the first octet of payload)
+ */
+static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
+{
+ if (ieee80211_is_disassoc(hdr->frame_control) ||
+ ieee80211_is_deauth(hdr->frame_control))
+ return true;
+
+ if (ieee80211_is_action(hdr->frame_control)) {
+ u8 *category;
+
+ /*
+ * Action frames, excluding Public Action frames, are Robust
+ * Management Frames. However, if we are looking at a Protected
+ * frame, skip the check since the data may be encrypted and
+ * the frame has already been found to be a Robust Management
+ * Frame (by the other end).
+ */
+ if (ieee80211_has_protected(hdr->frame_control))
+ return true;
+ category = ((u8 *) hdr) + 24;
+ return *category != WLAN_CATEGORY_PUBLIC;
+ }
+
+ return false;
+}
+
+/**
* ieee80211_fhss_chan_to_freq - get channel frequency
* @channel: the FHSS channel
*