VXLAN_F_RCV_FLAGS
vs->flags = (flags & VXLAN_F_RCV_FLAGS);
if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) !=
(conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)))
flags &= VXLAN_F_RCV_FLAGS;