*/
struct virtio_net_hdr {
#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /**< Use csum_start,csum_offset*/
+#define VIRTIO_NET_HDR_F_DATA_VALID 2 /**< Checksum is valid */
uint8_t flags;
#define VIRTIO_NET_HDR_GSO_NONE 0 /**< Not a GSO frame */
#define VIRTIO_NET_HDR_GSO_TCPV4 1 /**< GSO frame, IPv4 TCP (TSO) */