Struct CouplingState 

pub struct CouplingState { /* private fields */ }

Sans-I/O policy shared by early and confirmed coupling drivers.

Implementations

impl CouplingState

pub fn new() -> Self

A fresh early coupling, with neither dialog confirmed.

pub fn confirm(&mut self, leg: Leg)

Record that one leg has reached a confirmed dialog.

pub fn is_confirmed(&self, leg: Leg) -> bool

Whether this leg has reached a confirmed dialog.

pub fn begin_offer(&mut self, source: Leg, axis: OfferAxis) -> OfferAction

Begin relaying an offer.

A collision with an offer this coupling sent on the source leg is refused 491. The remote UAC owns the randomized retry required by RFC 3261 §14.1; when it arrives after completion, it enters through this method as a new transaction.

pub fn complete(&mut self, source: Leg) -> bool

Complete the exchange sourced on source.

Returns whether an exchange from that leg was outstanding.

pub fn fail(&mut self, source: Leg) -> bool

Fail the exchange sourced on source.

Failure settles the offer/answer axis just as a final answer does; there is no answer left outstanding after a final refusal.

pub fn is_idle(&self) -> bool

Whether both per-leg offer/answer machines are idle.

pub fn cancel(&self, source: Leg) -> CancelAction

Map a CANCEL on source according to the peer leg’s confirmation state.

pub fn final_failure(&self, source: Leg, status: u16) -> FailureAction

Map a final failure on source according to the peer leg’s confirmation state.

Trait Implementations

impl Debug for CouplingState

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

Formats the value using the given formatter.

impl Default for CouplingState

fn default() -> Self

Returns the “default value” for a type.