OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
[OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
+ OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_xmit_skb])
OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [bool xnet],
[OVS_DEFINE([HAVE_VXLAN_XMIT_SKB_XNET_ARG])])
OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],