Enum LengthEncoding

pub enum LengthEncoding {
    TypeLengthValue {
        option_len_multiplier: NonZeroUsize,
    },
    ValueOnly,
}

Whether the length field of an option encodes the length of the entire option (including kind and length fields) or only of the value field.

For the TypeLengthValue variant, an option_len_multiplier may also be specified. Some formats (such as NDP) do not directly encode the length in bytes of each option, but instead encode a number which must be multiplied by option_len_multiplier in order to get the length in bytes.

Variants

TypeLengthValue

Fields

option_len_multiplier: NonZeroUsize

ValueOnly

Implementations

impl LengthEncoding

pub fn encode_length<F: KindLenField>(self, option_body_len: usize) -> Option<F>

Encodes the length of an option’s body.

option_body_len is the length in bytes of the body option as returned from [OptionsSerializerImpl::option_length]. This value does not include the kind, length, or padding bytes.

encode_length computes the value which should be stored in the length field, returning None if the value cannot be stored in an F.

Trait Implementations

impl Clone for LengthEncoding

fn clone(&self) -> LengthEncoding

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for LengthEncoding

fn eq(&self, other: &LengthEncoding) -> 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 LengthEncoding

impl Eq for LengthEncoding

impl StructuralPartialEq for LengthEncoding