Enum TypeField 

#[non_exhaustive]
pub enum TypeField {
    NextHeader {
        h_len: u8,
        h_type: u8,
    },
    EtherType(u16),
}

A decoded ULE Type field (RFC 4326 §4.4).

Type < 0x0600 is a TypeField::NextHeader (the start of an extension header); Type >= 0x0600 is a TypeField::EtherType naming the PDU that directly follows the Type field.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

NextHeader

A Next-Header: H-LEN (3 bits) + H-Type (8 bits), with the 5-bit zero prefix that keeps the raw value < 0x0600.

Fields

h_len: u8

3-bit length/class selector (RFC 4326 §5). 0 = Mandatory; 1..=5 = Optional (total extension bytes = 2 * h_len).

h_type: u8

8-bit extension-header type code.

EtherType(u16)

An EtherType (>= 0x0600) of the carried PDU (RFC 4326 §4.4.2).

Implementations

impl TypeField

pub fn from_u16(raw: u16) -> Self

Decode a raw 16-bit Type-field value.

pub fn to_u16(self) -> u16

Encode back to the raw 16-bit wire value.

pub fn is_next_header(self) -> bool

true if this Type field starts an extension header (Next-Header).

pub fn name(&self) -> &'static str

Spec label for this kind of Type field.

Trait Implementations

impl Clone for TypeField

fn clone(&self) -> TypeField

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TypeField

impl Debug for TypeField

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

Formats the value using the given formatter.

impl Display for TypeField

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

Formats the value using the given formatter.

impl Eq for TypeField

impl Hash for TypeField

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TypeField

fn eq(&self, other: &TypeField) -> 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 Serialize for TypeField

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TypeField