Struct SessionStateMachine 

pub struct SessionStateMachine {
    state: SessionState,
}

Pure state machine for MoQT session lifecycle. Transitions: Connecting → SetupExchange → Active → Draining → Closed.

Fields

state: SessionState

Implementations

impl SessionStateMachine

pub fn new() -> Self

Create a new state machine starting in the Connecting state.

pub fn state(&self) -> SessionState

Returns the current session state.

pub fn on_connect(&mut self) -> Result<(), SessionError>

Transition: Connecting → SetupExchange.

pub fn on_setup_complete(&mut self) -> Result<(), SessionError>

Transition: SetupExchange → Active.

pub fn on_goaway(&mut self) -> Result<(), SessionError>

Transition: Active → Draining (GOAWAY received).

pub fn on_close(&mut self) -> Result<(), SessionError>

Transition: SetupExchange|Active|Draining -> Closed.

draft-07 Section 3.5: “The Transport Session can be terminated at any point.” Section 6.2.1 obliges an endpoint to do so during the Setup exchange itself: “If the server does not support any of the versions offered by the client, or the client receives a server version that it did not offer, the corresponding peer MUST close the session.” That failure is reachable only from SetupExchange, so a session that cannot close there cannot record the one outcome the draft requires of it.

Connecting is still refused: no transport session has been established, so there is nothing to terminate.

Trait Implementations

impl Default for SessionStateMachine

fn default() -> Self

Returns the “default value” for a type.