gre: Tunnel encap/decap flags

[vpp.git] / src / vnet / ip / ip4_packet.h

diff --git a/src/vnet/ip/ip4_packet.h b/src/vnet/ip/ip4_packet.h
index 1d3607e..3872ccd 100644 (file)
--- a/src/vnet/ip/ip4_packet.h
+++ b/src/vnet/ip/ip4_packet.h
@@ -322,7 +322,7 @@ ip4_header_clear_df (ip4_header_t * ip4)
 }
 
 always_inline u8
-ip4_header_get_df (ip4_header_t * ip4)
+ip4_header_get_df (const ip4_header_t * ip4)
 {
   return (! !(ip4->flags_and_fragment_offset &
              clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT)));