Struct CongestionState 

pub struct CongestionState {
    pub cwnd: u32,
    pub ssthresh: u32,
    pub rto: u64,
    pub dup_ack_count: u32,
    pub phase: CongestionPhase,
    /* private fields */
}

TCP Reno congestion control state

Fields

cwnd: u32

Congestion window (bytes)

ssthresh: u32

Slow-start threshold (bytes)

rto: u64

Retransmission timeout (microseconds)

dup_ack_count: u32

Duplicate ACK counter

phase: CongestionPhase

Current congestion phase

Implementations

impl CongestionState

pub fn new() -> Self

Create a new congestion control state with default initial values.

• cwnd starts at 1 MSS (1460 bytes)
• ssthresh starts at u32::MAX (effectively infinite)
• RTO starts at 1 second

pub fn srtt_us(&self) -> u64

Return the smoothed RTT estimate in microseconds (unshifted).

pub fn rttvar_us(&self) -> u64

Return the RTT variance in microseconds (unshifted).

Trait Implementations

impl Clone for CongestionState

fn clone(&self) -> CongestionState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CongestionState

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

Formats the value using the given formatter.

impl Default for CongestionState

fn default() -> Self

Returns the “default value” for a type.