Function capsule_ffi::rte_eth_dev_l2_tunnel_offload_set

pub unsafe extern "C" fn rte_eth_dev_l2_tunnel_offload_set(
    port_id: u16, 
    l2_tunnel: *mut rte_eth_l2_tunnel_conf, 
    mask: u32, 
    en: u8
) -> c_int