home *** CD-ROM | disk | FTP | other *** search
- #ifndef _LINUX_VIRTIO_NET_H
- #define _LINUX_VIRTIO_NET_H
- /* This header is BSD licensed so anyone can use the definitions to implement
- * compatible drivers/servers. */
- #include <linux/virtio_config.h>
-
- /* The ID for virtio_net */
- #define VIRTIO_ID_NET 1
-
- /* The feature bitmap for virtio net */
- #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
- #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
- #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
- #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
- #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
- #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
- #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
- #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
- #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
- #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
- #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
- #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
-
- struct virtio_net_config
- {
- /* The config defining mac address (if VIRTIO_NET_F_MAC) */
- __u8 mac[6];
- } __attribute__((packed));
-
- /* This is the first element of the scatter-gather list. If you don't
- * specify GSO or CSUM features, you can simply ignore the header. */
- struct virtio_net_hdr
- {
- #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
- __u8 flags;
- #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
- #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
- #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
- #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
- #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
- __u8 gso_type;
- __u16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
- __u16 gso_size; /* Bytes to append to hdr_len per frame */
- __u16 csum_start; /* Position to start checksumming from */
- __u16 csum_offset; /* Offset after that to place checksum */
- };
- #endif /* _LINUX_VIRTIO_NET_H */
-