Struct RenoController 

pub struct RenoController { /* private fields */ }

TCP Reno congestion controller

Implementations

impl RenoController

pub fn new() -> Self

Create a new Reno 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.

pub fn rttvar_us(&self) -> u64

Return the RTT variance in microseconds.

Trait Implementations

impl Clone for RenoController

fn clone(&self) -> RenoController

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl CongestionController for RenoController

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

Handle acknowledgment of new data.

In SlowStart: cwnd += MSS per ACK (doubles per RTT) In CongestionAvoidance: cwnd += MSS * MSS / cwnd per ACK (~MSS per RTT) In FastRecovery: transition to CongestionAvoidance, cwnd = ssthresh (deflate)

fn on_duplicate_ack(&mut self)

Handle a duplicate ACK.

After 3 duplicate ACKs: enter fast retransmit / fast recovery. During fast recovery: inflate cwnd by MSS per additional dup ACK.

fn on_timeout(&mut self)

Handle a retransmission timeout.

This is the most severe congestion signal:

• ssthresh = max(cwnd / 2, 2 * MSS)
• cwnd = 1 MSS
• Back to slow start
• Double the RTO (exponential backoff)

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 RenoController

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

Formats the value using the given formatter.

impl Default for RenoController

fn default() -> Self

Returns the “default value” for a type.