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1 // Copyright (c) 2015 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2015 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 TCP cubic. | 5 // TCP cubic send side congestion algorithm, emulates the behavior of TCP cubic. |
6 | 6 |
7 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_BYTES_SENDER_H_ | 7 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_BYTES_SENDER_H_ |
8 #define NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_BYTES_SENDER_H_ | 8 #define NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_BYTES_SENDER_H_ |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
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25 namespace test { | 25 namespace test { |
26 class TcpCubicBytesSenderPeer; | 26 class TcpCubicBytesSenderPeer; |
27 } // namespace test | 27 } // namespace test |
28 | 28 |
29 class NET_EXPORT_PRIVATE TcpCubicBytesSender : public SendAlgorithmInterface { | 29 class NET_EXPORT_PRIVATE TcpCubicBytesSender : public SendAlgorithmInterface { |
30 public: | 30 public: |
31 TcpCubicBytesSender(const QuicClock* clock, | 31 TcpCubicBytesSender(const QuicClock* clock, |
32 const RttStats* rtt_stats, | 32 const RttStats* rtt_stats, |
33 bool reno, | 33 bool reno, |
34 QuicPacketCount initial_tcp_congestion_window, | 34 QuicPacketCount initial_tcp_congestion_window, |
| 35 QuicPacketCount max_congestion_window, |
35 QuicConnectionStats* stats); | 36 QuicConnectionStats* stats); |
36 ~TcpCubicBytesSender() override; | 37 ~TcpCubicBytesSender() override; |
37 | 38 |
38 // Start implementation of SendAlgorithmInterface. | 39 // Start implementation of SendAlgorithmInterface. |
39 void SetFromConfig(const QuicConfig& config, | 40 void SetFromConfig(const QuicConfig& config, |
40 Perspective perspective, | 41 Perspective perspective, |
41 bool using_pacing) override; | 42 bool using_pacing) override; |
42 bool ResumeConnectionState( | 43 bool ResumeConnectionState( |
43 const CachedNetworkParameters& cached_network_params) override; | 44 const CachedNetworkParameters& cached_network_params) override; |
44 void SetNumEmulatedConnections(int num_connections) override; | 45 void SetNumEmulatedConnections(int num_connections) override; |
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108 | 109 |
109 // Track the largest sequence number outstanding when a CWND cutback occurs. | 110 // Track the largest sequence number outstanding when a CWND cutback occurs. |
110 QuicPacketSequenceNumber largest_sent_at_last_cutback_; | 111 QuicPacketSequenceNumber largest_sent_at_last_cutback_; |
111 | 112 |
112 // Congestion window in bytes. | 113 // Congestion window in bytes. |
113 QuicByteCount congestion_window_; | 114 QuicByteCount congestion_window_; |
114 | 115 |
115 // Minimum congestion window in bytes. | 116 // Minimum congestion window in bytes. |
116 QuicByteCount min_congestion_window_; | 117 QuicByteCount min_congestion_window_; |
117 | 118 |
| 119 // Maximum congestion window in bytes. |
| 120 QuicByteCount max_congestion_window_; |
| 121 |
118 // Slow start congestion window in bytes, aka ssthresh. | 122 // Slow start congestion window in bytes, aka ssthresh. |
119 QuicByteCount slowstart_threshold_; | 123 QuicByteCount slowstart_threshold_; |
120 | 124 |
121 // Whether the last loss event caused us to exit slowstart. Used for stats | 125 // Whether the last loss event caused us to exit slowstart. Used for stats |
122 // collection of slowstart_packets_lost. | 126 // collection of slowstart_packets_lost. |
123 bool last_cutback_exited_slowstart_; | 127 bool last_cutback_exited_slowstart_; |
124 | 128 |
125 const QuicClock* clock_; | 129 const QuicClock* clock_; |
126 | 130 |
127 DISALLOW_COPY_AND_ASSIGN(TcpCubicBytesSender); | 131 DISALLOW_COPY_AND_ASSIGN(TcpCubicBytesSender); |
128 }; | 132 }; |
129 | 133 |
130 } // namespace net | 134 } // namespace net |
131 | 135 |
132 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_BYTES_SENDER_H_ | 136 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_BYTES_SENDER_H_ |
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