s2n_quic_core/frame/
congestion_controlled.rs

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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

//= https://www.rfc-editor.org/rfc/rfc9002#section-7
//# Similar to TCP, packets containing only ACK frames do not count
//# towards bytes in flight and are not congestion controlled.

/// Trait to retrieve CongestionControlled for a given value
pub trait CongestionControlled {
    #[inline]
    fn is_congestion_controlled(&self) -> bool {
        true
    }
}

impl<AckRanges> CongestionControlled for crate::frame::Ack<AckRanges> {
    #[inline]
    fn is_congestion_controlled(&self) -> bool {
        false
    }
}
impl CongestionControlled for crate::frame::ConnectionClose<'_> {}
impl<Data> CongestionControlled for crate::frame::Crypto<Data> {}
//= https://www.rfc-editor.org/rfc/rfc9221#section-5.4
//# DATAGRAM frames employ the QUIC connection's congestion controller.
impl<Data> CongestionControlled for crate::frame::Datagram<Data> {}
impl CongestionControlled for crate::frame::DataBlocked {}
//= https://www.rfc-editor.org/rfc/rfc9000#section-19.21
//# Extension frames MUST be congestion controlled and MUST cause
//# an ACK frame to be sent.
impl CongestionControlled for crate::frame::DcStatelessResetTokens<'_> {}
impl CongestionControlled for crate::frame::HandshakeDone {}
impl CongestionControlled for crate::frame::MaxData {}
impl CongestionControlled for crate::frame::MaxStreamData {}
impl CongestionControlled for crate::frame::MaxStreams {}
impl CongestionControlled for crate::frame::NewConnectionId<'_> {}
impl CongestionControlled for crate::frame::NewToken<'_> {}
impl CongestionControlled for crate::frame::Padding {
    //= https://www.rfc-editor.org/rfc/rfc9002#section-2
    //= type=exception
    //= reason=https://github.com/aws/s2n-quic/pull/1514
    //# Packets are considered in flight when they are ack-eliciting or contain a PADDING frame

    //= https://www.rfc-editor.org/rfc/rfc9002#section-3
    //= type=exception
    //= reason=https://github.com/aws/s2n-quic/pull/1514
    //# PADDING frames cause packets to contribute toward bytes in
    //# flight without directly causing an acknowledgment to be sent.

    #[inline]
    fn is_congestion_controlled(&self) -> bool {
        false
    }
}
impl CongestionControlled for crate::frame::PathChallenge<'_> {}
impl CongestionControlled for crate::frame::PathResponse<'_> {}
impl CongestionControlled for crate::frame::Ping {}
impl CongestionControlled for crate::frame::ResetStream {}
impl CongestionControlled for crate::frame::RetireConnectionId {}
impl CongestionControlled for crate::frame::StopSending {}
impl CongestionControlled for crate::frame::StreamsBlocked {}
impl CongestionControlled for crate::frame::StreamDataBlocked {}
impl<Data> CongestionControlled for crate::frame::Stream<Data> {}