2 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 5d89d1b808a6..c56c350324e4 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -4,6 +4,7 @@
 #include <uapi/linux/ipv6.h>
 
 #define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
+#define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
 /*
  * This structure contains configuration options per IPv6 link.
  */
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index eb198acaac1d..488316e339a1 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -110,7 +110,8 @@ struct frag_hdr {
         __be32  identification;
 };
 
-#define IP6_MF  0x0001
+#define IP6_MF          0x0001
+#define IP6_OFFSET      0xFFF8
 
 #include <net/sock.h>