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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ | 5 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ |
| 6 #define NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ | 6 #define NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ |
| 7 | 7 |
| 8 #include <algorithm> | 8 #include <algorithm> |
| 9 #include <map> | 9 #include <map> |
| 10 | 10 |
| 11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
| 12 #include "net/quic/congestion_control/loss_detection_interface.h" | 12 #include "net/quic/congestion_control/loss_detection_interface.h" |
| 13 #include "net/quic/quic_protocol.h" | 13 #include "net/quic/quic_protocol.h" |
| 14 #include "net/quic/quic_time.h" | 14 #include "net/quic/quic_time.h" |
| 15 #include "net/quic/quic_unacked_packet_map.h" | 15 #include "net/quic/quic_unacked_packet_map.h" |
| 16 | 16 |
| 17 namespace net { | 17 namespace net { |
| 18 | 18 |
| 19 // Class which implement's TCP's approach of detecting loss when 3 nacks have | 19 // Class which implement's TCP's approach of detecting loss when 3 nacks have |
| 20 // been received for a packet. Also implements TCP's early retransmit(RFC5827). | 20 // been received for a packet. Also implements TCP's early retransmit(RFC5827). |
| 21 class NET_EXPORT_PRIVATE TCPLossAlgorithm : public LossDetectionInterface { | 21 class NET_EXPORT_PRIVATE TCPLossAlgorithm : public LossDetectionInterface { |
| 22 public: | 22 public: |
| 23 TCPLossAlgorithm(); | 23 TCPLossAlgorithm(); |
| 24 virtual ~TCPLossAlgorithm() {} | 24 virtual ~TCPLossAlgorithm() {} |
| 25 | 25 |
| 26 virtual LossDetectionType GetLossDetectionType() const OVERRIDE; | 26 virtual LossDetectionType GetLossDetectionType() const override; |
| 27 | 27 |
| 28 // Uses nack counts to decide when packets are lost. | 28 // Uses nack counts to decide when packets are lost. |
| 29 virtual SequenceNumberSet DetectLostPackets( | 29 virtual SequenceNumberSet DetectLostPackets( |
| 30 const QuicUnackedPacketMap& unacked_packets, | 30 const QuicUnackedPacketMap& unacked_packets, |
| 31 const QuicTime& time, | 31 const QuicTime& time, |
| 32 QuicPacketSequenceNumber largest_observed, | 32 QuicPacketSequenceNumber largest_observed, |
| 33 const RttStats& rtt_stats) OVERRIDE; | 33 const RttStats& rtt_stats) override; |
| 34 | 34 |
| 35 // Returns a non-zero value when the early retransmit timer is active. | 35 // Returns a non-zero value when the early retransmit timer is active. |
| 36 virtual QuicTime GetLossTimeout() const OVERRIDE; | 36 virtual QuicTime GetLossTimeout() const override; |
| 37 | 37 |
| 38 private: | 38 private: |
| 39 QuicTime loss_detection_timeout_; | 39 QuicTime loss_detection_timeout_; |
| 40 | 40 |
| 41 DISALLOW_COPY_AND_ASSIGN(TCPLossAlgorithm); | 41 DISALLOW_COPY_AND_ASSIGN(TCPLossAlgorithm); |
| 42 }; | 42 }; |
| 43 | 43 |
| 44 } // namespace net | 44 } // namespace net |
| 45 | 45 |
| 46 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ | 46 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_ |
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