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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 // TCP cubic send side congestion algorithm, emulates the behavior of | 5 // TCP cubic send side congestion algorithm, emulates the behavior of |
6 // TCP cubic. | 6 // TCP cubic. |
7 | 7 |
8 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ | 8 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ |
9 #define NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ | 9 #define NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ |
10 | 10 |
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55 virtual void RevertRetransmissionTimeout() OVERRIDE; | 55 virtual void RevertRetransmissionTimeout() OVERRIDE; |
56 virtual QuicTime::Delta TimeUntilSend( | 56 virtual QuicTime::Delta TimeUntilSend( |
57 QuicTime now, | 57 QuicTime now, |
58 QuicByteCount bytes_in_flight, | 58 QuicByteCount bytes_in_flight, |
59 HasRetransmittableData has_retransmittable_data) const OVERRIDE; | 59 HasRetransmittableData has_retransmittable_data) const OVERRIDE; |
60 virtual QuicBandwidth BandwidthEstimate() const OVERRIDE; | 60 virtual QuicBandwidth BandwidthEstimate() const OVERRIDE; |
61 virtual bool HasReliableBandwidthEstimate() const OVERRIDE; | 61 virtual bool HasReliableBandwidthEstimate() const OVERRIDE; |
62 virtual QuicTime::Delta RetransmissionDelay() const OVERRIDE; | 62 virtual QuicTime::Delta RetransmissionDelay() const OVERRIDE; |
63 virtual QuicByteCount GetCongestionWindow() const OVERRIDE; | 63 virtual QuicByteCount GetCongestionWindow() const OVERRIDE; |
64 virtual bool InSlowStart() const OVERRIDE; | 64 virtual bool InSlowStart() const OVERRIDE; |
| 65 virtual bool InRecovery() const OVERRIDE; |
65 virtual QuicByteCount GetSlowStartThreshold() const OVERRIDE; | 66 virtual QuicByteCount GetSlowStartThreshold() const OVERRIDE; |
66 virtual CongestionControlType GetCongestionControlType() const OVERRIDE; | 67 virtual CongestionControlType GetCongestionControlType() const OVERRIDE; |
67 // End implementation of SendAlgorithmInterface. | 68 // End implementation of SendAlgorithmInterface. |
68 | 69 |
69 private: | 70 private: |
70 friend class test::TcpCubicSenderPeer; | 71 friend class test::TcpCubicSenderPeer; |
71 | 72 |
72 // TODO(ianswett): Remove these and migrate to OnCongestionEvent. | 73 // TODO(ianswett): Remove these and migrate to OnCongestionEvent. |
73 void OnPacketAcked(QuicPacketSequenceNumber acked_sequence_number, | 74 void OnPacketAcked(QuicPacketSequenceNumber acked_sequence_number, |
74 QuicByteCount acked_bytes, | 75 QuicByteCount acked_bytes, |
75 QuicByteCount bytes_in_flight); | 76 QuicByteCount bytes_in_flight); |
76 void OnPacketLost(QuicPacketSequenceNumber largest_loss, | 77 void OnPacketLost(QuicPacketSequenceNumber largest_loss, |
77 QuicByteCount bytes_in_flight); | 78 QuicByteCount bytes_in_flight); |
78 | 79 |
79 QuicByteCount SendWindow() const; | 80 QuicByteCount SendWindow() const; |
80 void MaybeIncreaseCwnd(QuicPacketSequenceNumber acked_sequence_number, | 81 void MaybeIncreaseCwnd(QuicPacketSequenceNumber acked_sequence_number, |
81 QuicByteCount bytes_in_flight); | 82 QuicByteCount bytes_in_flight); |
82 bool IsCwndLimited(QuicByteCount bytes_in_flight) const; | 83 bool IsCwndLimited(QuicByteCount bytes_in_flight) const; |
83 bool InRecovery() const; | |
84 // Methods for isolating PRR from the rest of TCP Cubic. | 84 // Methods for isolating PRR from the rest of TCP Cubic. |
85 void PrrOnPacketLost(QuicByteCount bytes_in_flight); | 85 void PrrOnPacketLost(QuicByteCount bytes_in_flight); |
86 void PrrOnPacketAcked(QuicByteCount acked_bytes); | 86 void PrrOnPacketAcked(QuicByteCount acked_bytes); |
87 QuicTime::Delta PrrTimeUntilSend(QuicByteCount bytes_in_flight) const; | 87 QuicTime::Delta PrrTimeUntilSend(QuicByteCount bytes_in_flight) const; |
88 | 88 |
89 | 89 |
90 HybridSlowStart hybrid_slow_start_; | 90 HybridSlowStart hybrid_slow_start_; |
91 Cubic cubic_; | 91 Cubic cubic_; |
92 const RttStats* rtt_stats_; | 92 const RttStats* rtt_stats_; |
93 QuicConnectionStats* stats_; | 93 QuicConnectionStats* stats_; |
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136 | 136 |
137 // Maximum number of outstanding packets for tcp. | 137 // Maximum number of outstanding packets for tcp. |
138 QuicTcpCongestionWindow max_tcp_congestion_window_; | 138 QuicTcpCongestionWindow max_tcp_congestion_window_; |
139 | 139 |
140 DISALLOW_COPY_AND_ASSIGN(TcpCubicSender); | 140 DISALLOW_COPY_AND_ASSIGN(TcpCubicSender); |
141 }; | 141 }; |
142 | 142 |
143 } // namespace net | 143 } // namespace net |
144 | 144 |
145 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ | 145 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ |
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