1 files changed, 10 insertions, 0 deletions

diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index a0c2b41a24d7..dfd8bf66ce27 100644
--- a/include/net/ieee80211_radiotap.h
+++ b/include/net/ieee80211_radiotap.h
@@ -40,6 +40,7 @@
 
 #include <linux/if_ether.h>
 #include <linux/kernel.h>
+#include <asm/unaligned.h>
 
 /* Radiotap header version (from official NetBSD feed) */
 #define IEEE80211RADIOTAP_VERSION       "1.5"
@@ -255,4 +256,13 @@ enum ieee80211_radiotap_type {
         (((x) == 14) ? 2484 : ((x) * 5) + 2407) : \
         ((x) + 1000) * 5)
 
+/* helpers */
+static inline int ieee80211_get_radiotap_len(unsigned char *data)
+{
+        struct ieee80211_radiotap_header *hdr =
+                (struct ieee80211_radiotap_header *)data;
+
+        return le16_to_cpu(get_unaligned(&hdr->it_len));
+}
+
 #endif                          /* IEEE80211_RADIOTAP_H */