ovs_be32 nw_src_mask; /* 1-bit in each significant nw_src bit. */
ovs_be32 nw_dst_mask; /* 1-bit in each significant nw_dst bit. */
ovs_be16 vlan_tci_mask; /* 1-bit in each significant vlan_tci bit. */
ovs_be32 nw_src_mask; /* 1-bit in each significant nw_src bit. */
ovs_be32 nw_dst_mask; /* 1-bit in each significant nw_dst bit. */
ovs_be16 vlan_tci_mask; /* 1-bit in each significant vlan_tci bit. */