Struct OxmHeader 

pub struct OxmHeader {
    pub class: OxmClass,
    pub field: u8,
    pub has_mask: bool,
    pub length: u8,
}

OXM header containing class, field, mask flag, and length.

This struct represents the 4-byte header that precedes OXM field values in OpenFlow 1.2+ match encoding.

Fields

class: OxmClass

OXM class (e.g., OpenflowBasic, Nxm0, Nxm1)

field: u8

Field identifier within the class (7 bits, 0-127)

has_mask: bool

Whether this field has a mask following the value

length: u8

Length of the value bytes (or value + mask if has_mask is true)

Implementations

impl OxmHeader

pub const fn new(class: OxmClass, field: u8, has_mask: bool, length: u8) -> Self

Create a new OXM header with raw field value.

pub const fn openflow_basic(field: OxmField, has_mask: bool, length: u8) -> Self

Create an OXM header for an OpenFlow Basic field.

pub const fn encode(self) -> [u8; 4]

Encode the header to 4 bytes in network byte order.

Wire Format

Byte 0: class high byte
Byte 1: class low byte
Byte 2: (field << 1) | has_mask
Byte 3: length

pub const fn as_u32(self) -> u32

Get the encoded header as a big-endian u32.

Trait Implementations

impl Clone for OxmHeader

fn clone(&self) -> OxmHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OxmHeader

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

Formats the value using the given formatter.

impl PartialEq for OxmHeader

fn eq(&self, other: &OxmHeader) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for OxmHeader

impl Eq for OxmHeader

impl StructuralPartialEq for OxmHeader