| // Copyright (c) 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Implements Proportional Rate Reduction (PRR) per RFC 6937. |
| |
| #ifndef QUICHE_QUIC_CORE_CONGESTION_CONTROL_PRR_SENDER_H_ |
| #define QUICHE_QUIC_CORE_CONGESTION_CONTROL_PRR_SENDER_H_ |
| |
| #include "net/third_party/quiche/src/quic/core/quic_bandwidth.h" |
| #include "net/third_party/quiche/src/quic/core/quic_time.h" |
| #include "net/third_party/quiche/src/quic/platform/api/quic_export.h" |
| |
| namespace quic { |
| |
| class QUIC_EXPORT_PRIVATE PrrSender { |
| public: |
| PrrSender(); |
| // OnPacketLost should be called on the first loss that triggers a recovery |
| // period and all other methods in this class should only be called when in |
| // recovery. |
| void OnPacketLost(QuicByteCount prior_in_flight); |
| void OnPacketSent(QuicByteCount sent_bytes); |
| void OnPacketAcked(QuicByteCount acked_bytes); |
| bool CanSend(QuicByteCount congestion_window, |
| QuicByteCount bytes_in_flight, |
| QuicByteCount slowstart_threshold) const; |
| |
| private: |
| // Bytes sent and acked since the last loss event. |
| // |bytes_sent_since_loss_| is the same as "prr_out_" in RFC 6937, |
| // and |bytes_delivered_since_loss_| is the same as "prr_delivered_". |
| QuicByteCount bytes_sent_since_loss_; |
| QuicByteCount bytes_delivered_since_loss_; |
| size_t ack_count_since_loss_; |
| |
| // The congestion window before the last loss event. |
| QuicByteCount bytes_in_flight_before_loss_; |
| }; |
| |
| } // namespace quic |
| |
| #endif // QUICHE_QUIC_CORE_CONGESTION_CONTROL_PRR_SENDER_H_ |