Enum PayloadShape 

pub enum PayloadShape {
    Fixed(usize),
    Table {
        entry_length: usize,
    },
    Npdu {
        prefix: usize,
    },
}

How long the payload of a BVLL message may be: the octets after the 4-octet header, which depend on the function alone (Annex J.2, U.2).

BvlcFunction::payload_shape gives it for B/IP and Bvlc6Function::payload_shape for B/IPv6.

Variants

Fixed(usize)

Exactly this many octets.

Table

A table of whole entries of this many octets each. An empty table is allowed. Only B/IP messages carry tables.

Fields

entry_length: usize

Octets per entry.

Npdu

This many octets of fixed fields, then an NPDU of any length. The codec does not look inside the NPDU; the network layer does.

Fields

prefix: usize

Octets before the NPDU.

Implementations

impl PayloadShape

pub const fn admits(self, length: usize) -> bool

Whether a payload of length octets fits this shape.

Trait Implementations

impl Clone for PayloadShape

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PayloadShape

impl Debug for PayloadShape

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

Formats the value using the given formatter.

impl Eq for PayloadShape

impl PartialEq for PayloadShape

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PayloadShape