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PixFillState

hopr_transport_session::manager

Struct PixFillState 

Source 
struct PixFillState {
    notify_started: bool,
    fill: FillRate,
    last_notify_at: Option<Instant>,
    withholding: bool,
    draining: bool,
}

Fields§

§notify_started: bool

Whether the initial notification delay has elapsed.

The notification stream deliberately waits one period before starting, so a Session that closes immediately never sends one. Fill does not wait, and must not be held behind this.

§fill: FillRate

The rate the PIX supervisor last asked for. FillRate::ZERO when it is not filling.

§last_notify_at: Option<Instant>

When a packet was last let through as the SURB-level notification.

The two producers share a stream, so nothing about a packet says which of them it belongs to. This is what makes the distinction: one packet per notification period is the notification and is exempt from the SURB reserve, and everything above that rate is fill and is not.

§withholding: bool

Whether the SURB reserve is currently withholding fill, so hopr_pix_sessions_stalled counts this Session once per stall rather than once per refused packet.

§draining: bool

Whether this stream is draining the SURB buffer of a Session that has already been closed.

Set once, by PixFillControl::enter_drain, and never cleared: a drain ends with the Session, and the stream with it.

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