net.rs

//! Network Device

use num_enum::{FromPrimitive, IntoPrimitive, TryFromPrimitive};
use volatile::access::ReadOnly;
use volatile_macro::VolatileFieldAccess;

pub use super::features::net::F;
use crate::{le16, le32};

endian_bitflags! {
    /// Network Device Status Flags
    #[doc(alias = "VIRTIO_NET_S")]
    pub struct S: le16 {
        #[doc(alias = "VIRTIO_NET_S_LINK_UP")]
        const LINK_UP = 1;

        #[doc(alias = "VIRTIO_NET_S_ANNOUNCE")]
        const ANNOUNCE = 2;
    }
}

/// Network Device Configuration Layout
///
/// Use [`ConfigVolatileFieldAccess`] to work with this struct.
#[doc(alias = "virtio_net_config")]
#[cfg_attr(
    feature = "zerocopy",
    derive(
        zerocopy_derive::KnownLayout,
        zerocopy_derive::Immutable,
        zerocopy_derive::FromBytes,
    )
)]
#[derive(VolatileFieldAccess)]
#[repr(C)]
pub struct Config {
    #[access(ReadOnly)]
    mac: [u8; 6],

    #[access(ReadOnly)]
    status: S,

    #[access(ReadOnly)]
    max_virtqueue_pairs: le16,

    #[access(ReadOnly)]
    mtu: le16,

    #[access(ReadOnly)]
    speed: le32,

    #[access(ReadOnly)]
    duplex: u8,

    #[access(ReadOnly)]
    rss_max_key_size: u8,

    #[access(ReadOnly)]
    rss_max_indirection_table_length: le16,

    #[access(ReadOnly)]
    supported_hash_types: le32,
}

virtio_bitflags! {
    /// Network Device Header Flags
    #[doc(alias = "VIRTIO_NET_HDR_F")]
    pub struct HdrF: u8 {
        #[doc(alias = "VIRTIO_NET_HDR_F_NEEDS_CSUM")]
        const NEEDS_CSUM = 1;

        #[doc(alias = "VIRTIO_NET_HDR_F_DATA_VALID")]
        const DATA_VALID = 2;

        #[doc(alias = "VIRTIO_NET_HDR_F_RSC_INFO")]
        const RSC_INFO = 4;
    }
}

/// Network Device Header GSO Type
#[doc(alias = "VIRTIO_NET_HDR_GSO")]
#[derive(IntoPrimitive, FromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
#[non_exhaustive]
#[repr(u8)]
pub enum HdrGso {
    #[doc(alias = "VIRTIO_NET_HDR_GSO_NONE")]
    None = 0,

    #[doc(alias = "VIRTIO_NET_HDR_GSO_TCPV4")]
    Tcpv4 = 1,

    #[doc(alias = "VIRTIO_NET_HDR_GSO_UDP")]
    Udp = 3,

    #[doc(alias = "VIRTIO_NET_HDR_GSO_TCPV6")]
    Tcpv6 = 4,

    #[doc(alias = "VIRTIO_NET_HDR_GSO_UDP_L4")]
    UdpL4 = 5,

    #[doc(alias = "VIRTIO_NET_HDR_GSO_ECN")]
    Ecn = 0x80,

    #[num_enum(catch_all)]
    Unknown(u8),
}

/// Network Device Header
#[doc(alias = "virtio_net_hdr")]
#[cfg_attr(
    feature = "zerocopy",
    derive(
        zerocopy_derive::KnownLayout,
        zerocopy_derive::Immutable,
        zerocopy_derive::FromBytes,
        zerocopy_derive::IntoBytes,
    )
)]
#[derive(Default, Clone, Copy, Debug)]
#[repr(C)]
pub struct Hdr {
    pub flags: HdrF,
    pub gso_type: u8,
    pub hdr_len: le16,
    pub gso_size: le16,
    pub csum_start: le16,
    pub csum_offset: le16,
    pub num_buffers: le16,
}

/// Network Device Header Hash Report
///
/// Only if VIRTIO_NET_F_HASH_REPORT negotiated
#[doc(alias = "virtio_net_hdr")]
#[cfg_attr(
    feature = "zerocopy",
    derive(
        zerocopy_derive::KnownLayout,
        zerocopy_derive::Immutable,
        zerocopy_derive::FromBytes,
        zerocopy_derive::IntoBytes,
    )
)]
#[derive(Default, Clone, Copy, Debug)]
#[repr(C)]
pub struct HdrHashReport {
    /// Only if VIRTIO_NET_F_HASH_REPORT negotiated
    pub hash_value: le32,
    /// Only if VIRTIO_NET_F_HASH_REPORT negotiated
    pub hash_report: le16,
    /// Only if VIRTIO_NET_F_HASH_REPORT negotiated
    pub padding_reserved: le16,
}

endian_bitflags! {
    /// Hash Type
    #[doc(alias = "VIRTIO_NET_HASH_TYPE")]
    pub struct HashType: le32 {
        #[doc(alias = "VIRTIO_NET_HASH_TYPE_IPv4")]
        const IPV4 = 1 << 0;

        #[doc(alias = "VIRTIO_NET_HASH_TYPE_TCPv4")]
        const TCPV4 = 1 << 1;

        #[doc(alias = "VIRTIO_NET_HASH_TYPE_UDPv4")]
        const UDPV4 = 1 << 2;

        #[doc(alias = "VIRTIO_NET_HASH_TYPE_IPv6")]
        const IPV6 = 1 << 3;

        #[doc(alias = "VIRTIO_NET_HASH_TYPE_TCPv6")]
        const TCPV6 = 1 << 4;

        #[doc(alias = "VIRTIO_NET_HASH_TYPE_UDPv6")]
        const UDPV6 = 1 << 5;

        #[doc(alias = "VIRTIO_NET_HASH_TYPE_IP_EX")]
        const IP_EX = 1 << 6;

        #[doc(alias = "VIRTIO_NET_HASH_TYPE_TCP_EX")]
        const TCP_EX = 1 << 7;

        #[doc(alias = "VIRTIO_NET_HASH_TYPE_UDP_EX")]
        const UDP_EX = 1 << 8;
    }
}

/// Hash Report
#[doc(alias = "VIRTIO_NET_HASH_REPORT")]
#[derive(IntoPrimitive, FromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
#[non_exhaustive]
#[repr(u16)]
pub enum HashReport {
    #[doc(alias = "VIRTIO_NET_HASH_REPORT_NONE")]
    None = 0,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_IPv4")]
    Ipv4 = 1,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_TCPv4")]
    Tcpv4 = 2,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_UDPv4")]
    Udpv4 = 3,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_IPv6")]
    IPv6 = 4,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_TCPv6")]
    Tcpv6 = 5,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_UDPv6")]
    Udpv6 = 6,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_IPv6_EX")]
    Ipv6Ex = 7,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_TCPv6_EX")]
    Tcpv6Ex = 8,

    #[doc(alias = "VIRTIO_NET_HASH_REPORT_UDPv6_EX")]
    Udpv6Ex = 9,

    #[num_enum(catch_all)]
    Unknown(u16),
}

/// Command class
#[doc(alias = "VIRTIO_NET_CTRL")]
#[derive(IntoPrimitive, TryFromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
#[non_exhaustive]
#[repr(u8)]
pub enum Ctrl {
    #[doc(alias = "VIRTIO_NET_CTRL_RX")]
    Rx = 0,

    #[doc(alias = "VIRTIO_NET_CTRL_MAC")]
    Mac = 1,

    #[doc(alias = "VIRTIO_NET_CTRL_VLAN")]
    Vlan = 2,

    #[doc(alias = "VIRTIO_NET_CTRL_ANNOUNCE")]
    Announce = 3,

    #[doc(alias = "VIRTIO_NET_CTRL_MQ")]
    Mq = 4,

    #[doc(alias = "VIRTIO_NET_CTRL_GUEST_OFFLOADS")]
    GuestOffloads = 5,
}

/// Commands
pub mod ctrl {
    use num_enum::{IntoPrimitive, TryFromPrimitive};

    /// Packed Receive Filtering commands
    #[doc(alias = "VIRTIO_NET_CTRL_RX")]
    #[derive(IntoPrimitive, TryFromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
    #[non_exhaustive]
    #[repr(u8)]
    pub enum Rx {
        #[doc(alias = "VIRTIO_NET_CTRL_RX_PROMISC")]
        Promisc = 0,

        #[doc(alias = "VIRTIO_NET_CTRL_RX_ALLMULTI")]
        Allmulti = 1,

        #[doc(alias = "VIRTIO_NET_CTRL_RX_ALLUNI")]
        Alluni = 2,

        #[doc(alias = "VIRTIO_NET_CTRL_RX_NOMULTI")]
        Nomulti = 3,

        #[doc(alias = "VIRTIO_NET_CTRL_RX_NOUNI")]
        Nouni = 4,

        #[doc(alias = "VIRTIO_NET_CTRL_RX_NOBCAST")]
        Nobcast = 5,
    }

    /// MAC Address Filtering commands
    #[doc(alias = "VIRTIO_NET_CTRL_MAC")]
    #[derive(IntoPrimitive, TryFromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
    #[non_exhaustive]
    #[repr(u8)]
    pub enum Mac {
        #[doc(alias = "VIRTIO_NET_CTRL_MAC_TABLE_SET")]
        TableSet = 0,

        #[doc(alias = "VIRTIO_NET_CTRL_MAC_ADDR_SET")]
        AddrSet = 1,
    }

    /// VLAN filtering commands
    #[doc(alias = "VIRTIO_NET_CTRL_VLAN")]
    #[derive(IntoPrimitive, TryFromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
    #[non_exhaustive]
    #[repr(u8)]
    pub enum Vlan {
        #[doc(alias = "VIRTIO_NET_CTRL_VLAN_ADD")]
        Add = 0,

        #[doc(alias = "VIRTIO_NET_CTRL_VLAN_DEL")]
        Del = 1,
    }

    /// Gratuitous Packet Sending commands
    #[doc(alias = "VIRTIO_NET_CTRL_ANNOUNCE")]
    #[derive(IntoPrimitive, TryFromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
    #[non_exhaustive]
    #[repr(u8)]
    pub enum Announce {
        #[doc(alias = "VIRTIO_NET_CTRL_ANNOUNCE_ACK")]
        Ack = 0,
    }

    /// Multiqueue mode commands
    #[doc(alias = "VIRTIO_NET_CTRL_MQ")]
    #[derive(IntoPrimitive, TryFromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
    #[non_exhaustive]
    #[repr(u8)]
    pub enum Mq {
        /// For automatic receive steering
        #[doc(alias = "VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET")]
        VqPairsSet = 0,

        /// For configurable receive steering
        #[doc(alias = "VIRTIO_NET_CTRL_MQ_RSS_CONFIG")]
        RssConfig = 1,

        /// For configurable hash calculation
        #[doc(alias = "VIRTIO_NET_CTRL_MQ_HASH_CONFIG")]
        HashConfig = 2,
    }

    /// Setting Offloads State commands
    #[doc(alias = "VIRTIO_NET_CTRL_GUEST_OFFLOADS")]
    #[derive(IntoPrimitive, TryFromPrimitive, PartialEq, Eq, Clone, Copy, Debug)]
    #[non_exhaustive]
    #[repr(u8)]
    pub enum GuestOffloads {
        #[doc(alias = "VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET")]
        Set = 0,
    }
}