Struct LivenessConfig 

pub struct LivenessConfig {
    pub min_pto: Duration,
    pub path_down_ptos: u32,
    pub idle_timeout: Duration,
    pub keepalive_interval: Option<Duration>,
}

Tunables for path-down / session-death detection (Phase 4 / P4.3).

Fields

min_pto: Duration

Floor for the probe-timeout period. The effective PTO is max(min_pto, 3 × min_rtt), so an unmeasured RTT (min_rtt == 0) falls back to this floor.

path_down_ptos: u32

Consecutive probe-timeout periods of inbound silence — while we have outstanding unacked data — before the path is declared down.

idle_timeout: Duration

Once Migrating, how long to wait for the path to recover (a migrate + validate, or any inbound life) before declaring the session dead.

keepalive_interval: Option<Duration>

Idle keep-alive interval (Direction #3 — download-only liveness). When Some(iv), an otherwise-idle Connected session (no inbound for iv and nothing in flight) emits a small encrypted keep-alive PING every iv. That PING is in-flight until the peer PONGs it, so a download-only path — which sends only ACKs and otherwise has nothing in flight — gains an outstanding probe and can detect a silently-dead downstream via the same path_down_ptos × PTO sweep. None disables keep-alives (the path only trips on inactivity while reliable data is already outstanding).

Implementations

impl LivenessConfig

pub fn for_test() -> Self

Shrunk thresholds so tests/integration exercise the state machine in milliseconds instead of seconds (mirrors Session::set_rekey_threshold).

Trait Implementations

impl Clone for LivenessConfig

fn clone(&self) -> LivenessConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LivenessConfig

impl Debug for LivenessConfig

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

Formats the value using the given formatter.

impl Default for LivenessConfig

fn default() -> Self

Returns the “default value” for a type.