Struct CubicController 

pub struct CubicController { /* private fields */ }

TCP Cubic congestion controller (RFC 8312).

Cubic uses a cubic function of elapsed time since the last congestion event to set the congestion window, providing better bandwidth utilization on high-BDP networks than Reno while remaining TCP-friendly on low-BDP paths.

Implementations

impl CubicController

pub fn new() -> Self

Create a new Cubic congestion controller.

pub fn state(&self) -> &CongestionState

Access the underlying congestion state.

pub fn rto_us(&self) -> u64

Return the current RTO in microseconds.

pub fn phase(&self) -> CongestionPhase

Return the current congestion phase.

pub fn dup_ack_count(&self) -> u32

Return the duplicate ACK count.

pub fn srtt_us(&self) -> u64

Return the smoothed RTT in microseconds.

Trait Implementations

impl Clone for CubicController

fn clone(&self) -> CubicController

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl CongestionController for CubicController

fn on_ack(&mut self, bytes_acked: u32, rtt_us: u64)

Called when new data is acknowledged.

fn on_duplicate_ack(&mut self)

Called when a duplicate ACK is received.

fn on_timeout(&mut self)

Called when a retransmission timeout fires.

fn congestion_window(&self) -> u32

Returns the current congestion window in bytes.

fn slow_start_threshold(&self) -> u32

Returns the current slow-start threshold in bytes.

impl Debug for CubicController

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

Formats the value using the given formatter.

impl Default for CubicController

fn default() -> Self

Returns the “default value” for a type.