Enum Refusal 

pub enum Refusal {
    InProgress,
    Glare,
    AnswerOwed,
}

Why an UPDATE cannot be processed now (RFC 3311 §5.2).

Three variants and not one, because the distinction is the whole value of the section: a peer’s retry logic is built on it. 491 means the two sides collided and both should wait a randomised interval (RFC 3261 §14.1); 500 with Retry-After means the request was well-formed and badly timed, and the same one will work shortly. A peer told the wrong one either backs off when it did not need to or retries straight into the same wall.

Variants

InProgress

A previous UPDATE has not had its final response yet.

§5.2’s first rule, and the only one that applies to an UPDATE carrying no offer at all: it is about the transaction, not about any description.

Glare

An offer arrived while this side’s own offer is unanswered — glare.

AnswerOwed

An offer arrived while this side still owes an answer to one already received.

Implementations

impl Refusal

pub const fn status(self) -> u16

The status code to answer with.

pub const fn reason(self) -> &'static str

The reason phrase for that status.

pub const fn retry_after(self) -> bool

Whether the response must carry a Retry-After (§5.2).

Trait Implementations

impl Clone for Refusal

fn clone(&self) -> Refusal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Refusal

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

Formats the value using the given formatter.

impl PartialEq for Refusal

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

impl Eq for Refusal

impl StructuralPartialEq for Refusal