X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fnet%2Fieee80211_radiotap.h;h=dfd8bf66ce274f99e486cf80794980f255b398ae;hb=fa8d84b78be10d0c455dd716f40152bb7003bd5b;hp=a0c2b41a24d7d2174cd7ca9d7f8c98d8ca1ea56c;hpb=e389f9aec689209724105ae80a6c91fd2e747bc9;p=linux-2.6

diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index a0c2b41a24..dfd8bf66ce 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 */