diff options
Diffstat (limited to 'third_party/rust/neqo-transport/src/cc/classic_cc.rs')
| -rw-r--r-- | third_party/rust/neqo-transport/src/cc/classic_cc.rs | 105 |
1 files changed, 72 insertions, 33 deletions
diff --git a/third_party/rust/neqo-transport/src/cc/classic_cc.rs b/third_party/rust/neqo-transport/src/cc/classic_cc.rs index f8bcee6722..6914e91f67 100644 --- a/third_party/rust/neqo-transport/src/cc/classic_cc.rs +++ b/third_party/rust/neqo-transport/src/cc/classic_cc.rs @@ -298,6 +298,14 @@ impl<T: WindowAdjustment> CongestionControl for ClassicCongestionControl<T> { congestion || persistent_congestion } + /// Report received ECN CE mark(s) to the congestion controller as a + /// congestion event. + /// + /// See <https://datatracker.ietf.org/doc/html/rfc9002#section-b.7>. + fn on_ecn_ce_received(&mut self, largest_acked_pkt: &SentPacket) -> bool { + self.on_congestion_event(largest_acked_pkt) + } + fn discard(&mut self, pkt: &SentPacket) { if pkt.cc_outstanding() { assert!(self.bytes_in_flight >= pkt.size); @@ -488,8 +496,8 @@ impl<T: WindowAdjustment> ClassicCongestionControl<T> { /// Handle a congestion event. /// Returns true if this was a true congestion event. fn on_congestion_event(&mut self, last_packet: &SentPacket) -> bool { - // Start a new congestion event if lost packet was sent after the start - // of the previous congestion recovery period. + // Start a new congestion event if lost or ECN CE marked packet was sent + // after the start of the previous congestion recovery period. if !self.after_recovery_start(last_packet) { return false; } @@ -538,7 +546,7 @@ impl<T: WindowAdjustment> ClassicCongestionControl<T> { mod tests { use std::time::{Duration, Instant}; - use neqo_common::qinfo; + use neqo_common::{qinfo, IpTosEcn}; use test_fixture::now; use super::{ @@ -582,6 +590,7 @@ mod tests { SentPacket::new( PacketType::Short, pn, + IpTosEcn::default(), now() + t, ack_eliciting, Vec::new(), @@ -795,6 +804,7 @@ mod tests { SentPacket::new( PacketType::Short, u64::try_from(i).unwrap(), + IpTosEcn::default(), by_pto(t), true, Vec::new(), @@ -915,6 +925,7 @@ mod tests { lost[0] = SentPacket::new( lost[0].pt, lost[0].pn, + lost[0].ecn_mark, lost[0].time_sent, false, Vec::new(), @@ -1015,11 +1026,12 @@ mod tests { for _ in 0..packet_burst_size { let p = SentPacket::new( PacketType::Short, - next_pn, // pn - now, // time sent - true, // ack eliciting - Vec::new(), // tokens - MAX_DATAGRAM_SIZE, // size + next_pn, + IpTosEcn::default(), + now, + true, + Vec::new(), + MAX_DATAGRAM_SIZE, ); next_pn += 1; cc.on_packet_sent(&p); @@ -1039,11 +1051,12 @@ mod tests { for _ in 0..ABOVE_APP_LIMIT_PKTS { let p = SentPacket::new( PacketType::Short, - next_pn, // pn - now, // time sent - true, // ack eliciting - Vec::new(), // tokens - MAX_DATAGRAM_SIZE, // size + next_pn, + IpTosEcn::default(), + now, + true, + Vec::new(), + MAX_DATAGRAM_SIZE, ); next_pn += 1; cc.on_packet_sent(&p); @@ -1082,11 +1095,12 @@ mod tests { let p_lost = SentPacket::new( PacketType::Short, - 1, // pn - now, // time sent - true, // ack eliciting - Vec::new(), // tokens - MAX_DATAGRAM_SIZE, // size + 1, + IpTosEcn::default(), + now, + true, + Vec::new(), + MAX_DATAGRAM_SIZE, ); cc.on_packet_sent(&p_lost); cwnd_is_default(&cc); @@ -1095,11 +1109,12 @@ mod tests { cwnd_is_halved(&cc); let p_not_lost = SentPacket::new( PacketType::Short, - 2, // pn - now, // time sent - true, // ack eliciting - Vec::new(), // tokens - MAX_DATAGRAM_SIZE, // size + 2, + IpTosEcn::default(), + now, + true, + Vec::new(), + MAX_DATAGRAM_SIZE, ); cc.on_packet_sent(&p_not_lost); now += RTT; @@ -1118,11 +1133,12 @@ mod tests { for _ in 0..packet_burst_size { let p = SentPacket::new( PacketType::Short, - next_pn, // pn - now, // time sent - true, // ack eliciting - Vec::new(), // tokens - MAX_DATAGRAM_SIZE, // size + next_pn, + IpTosEcn::default(), + now, + true, + Vec::new(), + MAX_DATAGRAM_SIZE, ); next_pn += 1; cc.on_packet_sent(&p); @@ -1148,11 +1164,12 @@ mod tests { for _ in 0..ABOVE_APP_LIMIT_PKTS { let p = SentPacket::new( PacketType::Short, - next_pn, // pn - now, // time sent - true, // ack eliciting - Vec::new(), // tokens - MAX_DATAGRAM_SIZE, // size + next_pn, + IpTosEcn::default(), + now, + true, + Vec::new(), + MAX_DATAGRAM_SIZE, ); next_pn += 1; cc.on_packet_sent(&p); @@ -1180,4 +1197,26 @@ mod tests { last_acked_bytes = cc.acked_bytes; } } + + #[test] + fn ecn_ce() { + let mut cc = ClassicCongestionControl::new(NewReno::default()); + let p_ce = SentPacket::new( + PacketType::Short, + 1, + IpTosEcn::default(), + now(), + true, + Vec::new(), + MAX_DATAGRAM_SIZE, + ); + cc.on_packet_sent(&p_ce); + cwnd_is_default(&cc); + assert_eq!(cc.state, State::SlowStart); + + // Signal congestion (ECN CE) and thus change state to recovery start. + cc.on_ecn_ce_received(&p_ce); + cwnd_is_halved(&cc); + assert_eq!(cc.state, State::RecoveryStart); + } } |