Struct VsockHeader 

#[repr(C, packed(1))]
pub struct VsockHeader {
    pub src_cid: u64,
    pub dst_cid: u64,
    pub src_port: u32,
    pub dst_port: u32,
    pub len: u32,
    pub socket_type: u16,
    pub op: u16,
    pub flags: u32,
    pub buf_alloc: u32,
    pub fwd_cnt: u32,
}

Vsock packet header.

Fields

src_cid: u64

Source CID.

dst_cid: u64

Destination CID.

src_port: u32

Source port.

dst_port: u32

Destination port.

len: u32

Payload length.

socket_type: u16

Socket type (stream = 1).

op: u16

Operation.

flags: u32

Flags.

buf_alloc: u32

Buffer allocation.

fwd_cnt: u32

Forward count.

Implementations

impl VsockHeader

pub const SIZE: usize = 44

Header size in bytes.

The VirtIO vsock spec defines the header as exactly 44 bytes (packed). We cannot use mem::size_of::<Self>() because Rust adds trailing padding to satisfy the struct’s 8-byte alignment (from u64 fields), yielding 48. The guest kernel sends and expects exactly 44 bytes per header.

pub const fn new(src: VsockAddr, dst: VsockAddr, op: VsockOp) -> VsockHeader

Creates a new header.

pub const fn operation(&self) -> Option<VsockOp>

Returns the operation type.

pub fn from_bytes(bytes: &[u8]) -> Option<VsockHeader>

Parses a vsock header from a byte slice.

Returns None if the slice is too short.

pub fn to_bytes(&self) -> [u8; 44]

Serializes the header to a byte array.

Trait Implementations

impl Clone for VsockHeader

fn clone(&self) -> VsockHeader

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for VsockHeader

impl Debug for VsockHeader

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.