SessionManagerConfig

hopr_transport_session

Struct SessionManagerConfig 

Source 
pub struct SessionManagerConfig {
    pub maximum_sessions: usize,
    pub initiation_timeout_base: Duration,
    pub idle_timeout: Duration,
    pub balancer_sampling_interval: Duration,
    pub initial_return_session_egress_rate: usize,
    pub minimum_surb_buffer_duration: Duration,
    pub maximum_surb_buffer_size: usize,
    pub growable_target_surb_buffer: Option<(Duration, f64)>,
    /* private fields */
}
Expand description

Configuration for the SessionManager.

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§maximum_sessions: usize

The maximum number of sessions (incoming and outgoing) that is allowed to be managed by the manager.

When reached, creating new sessions will return the SessionManagerError::TooManySessions error, and incoming sessions will be rejected with [StartErrorReason::NoSlotsAvailable] Start protocol error.

Default is 128, minimum is 1; maximum is given by the session_tag_range.

§initiation_timeout_base: Duration

The base timeout for initiation of Session initiation.

The actual timeout is adjusted according to the number of hops for that Session: t = initiation_time_out_base * (num_forward_hops + num_return_hops + 2)

Default is 500 milliseconds.

§idle_timeout: Duration

Timeout for Session to be closed due to inactivity.

Default is 180 seconds.

§balancer_sampling_interval: Duration

The sampling interval for SURB balancer. It will make SURB control decisions regularly at this interval.

Default is 100 milliseconds.

§initial_return_session_egress_rate: usize

Initial packets per second egress rate on an incoming Session.

This only applies to incoming Sessions without the Capability::NoRateControl flag set.

Default is 10 packets/second.

§minimum_surb_buffer_duration: Duration

Minimum period of time for which a SURB buffer at the Exit must endure if no SURBs are being received.

In other words, it is the minimum period of time an Exit must withstand when no SURBs are received from the Entry at all. To do so, the egress traffic will be shaped accordingly to meet this requirement.

This only applies to incoming Sessions without the Capability::NoRateControl flag set.

Default is 5 seconds, minimum is 1 second.

§maximum_surb_buffer_size: usize

Indicates the maximum number of SURBs in the SURB buffer to be requested when creating a new Session.

This value is theoretically capped by the size of the global transport SURB ring buffer, so values greater than that do not make sense. This value should be ideally set equal to the size of the global transport SURB RB.

Default is 10 000 SURBs.

§growable_target_surb_buffer: Option<(Duration, f64)>

Determines if the target_surb_buffer_size can grow if the simple moving average of the current SURB buffer size estimate surpasses the given threshold over the given period.

This only applies if the used [SurbBalancerController] has this option.

The default is (60, 0.20) (20% growth if the average SURB buffer size surpasses 20% of the target buffer size in a 60-second window).

Trait Implementations§

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impl Clone for SessionManagerConfig

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fn clone(&self) -> SessionManagerConfig

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for SessionManagerConfig

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

Formats the value using the given formatter. Read more
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impl Default for SessionManagerConfig

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fn default() -> Self

Return SessionManagerConfig { session_tag_range: 16u64 .. 1024u64, maximum_sessions: 128, initiation_timeout_base: Duration::from_millis(500), idle_timeout: Duration::from_secs(180), balancer_sampling_interval: Duration::from_millis(100), initial_return_session_egress_rate: 10, minimum_surb_buffer_duration: Duration::from_secs(5), maximum_surb_buffer_size: 10_000, growable_target_surb_buffer: Some((Duration :: from_secs(60), 0.20)) }

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impl PartialEq for SessionManagerConfig

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for SessionManagerConfig

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