| // Copyright 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. |
| |
| #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ |
| #define NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ |
| |
| #include <algorithm> |
| #include <map> |
| |
| #include "base/basictypes.h" |
| #include "net/quic/congestion_control/loss_detection_interface.h" |
| #include "net/quic/quic_protocol.h" |
| #include "net/quic/quic_time.h" |
| #include "net/quic/quic_unacked_packet_map.h" |
| |
| namespace net { |
| |
| // Class which implement's TCP's approach of detecting loss when 3 nacks have |
| // been received for a packet. Also implements TCP's early retransmit(RFC5827). |
| class NET_EXPORT_PRIVATE TCPLossAlgorithm : public LossDetectionInterface { |
| public: |
| TCPLossAlgorithm(); |
| virtual ~TCPLossAlgorithm() {} |
| |
| virtual LossDetectionType GetLossDetectionType() const OVERRIDE; |
| |
| // Uses nack counts to decide when packets are lost. |
| virtual SequenceNumberSet DetectLostPackets( |
| const QuicUnackedPacketMap& unacked_packets, |
| const QuicTime& time, |
| QuicPacketSequenceNumber largest_observed, |
| const RttStats& rtt_stats) OVERRIDE; |
| |
| // Returns a non-zero value when the early retransmit timer is active. |
| virtual QuicTime GetLossTimeout() const OVERRIDE; |
| |
| private: |
| QuicTime loss_detection_timeout_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TCPLossAlgorithm); |
| }; |
| |
| } // namespace net |
| |
| #endif // NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ |