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Side by Side Diff: net/quic/congestion_control/tcp_cubic_sender_bytes.h

Issue 2193073003: Move shared files in net/quic/ into net/quic/core/ (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: io_thread_unittest.cc Created 4 years, 4 months ago
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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
3 // found in the LICENSE file.
4
5 // TCP cubic send side congestion algorithm, emulates the behavior of TCP cubic.
6
7 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_BYTES_H_
8 #define NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_BYTES_H_
9
10 #include <stdint.h>
11
12 #include "base/macros.h"
13 #include "net/base/net_export.h"
14 #include "net/quic/congestion_control/cubic_bytes.h"
15 #include "net/quic/congestion_control/hybrid_slow_start.h"
16 #include "net/quic/congestion_control/prr_sender.h"
17 #include "net/quic/congestion_control/tcp_cubic_sender_base.h"
18 #include "net/quic/quic_bandwidth.h"
19 #include "net/quic/quic_connection_stats.h"
20 #include "net/quic/quic_protocol.h"
21 #include "net/quic/quic_time.h"
22
23 namespace net {
24
25 class RttStats;
26
27 namespace test {
28 class TcpCubicSenderBytesPeer;
29 } // namespace test
30
31 class NET_EXPORT_PRIVATE TcpCubicSenderBytes : public TcpCubicSenderBase {
32 public:
33 TcpCubicSenderBytes(const QuicClock* clock,
34 const RttStats* rtt_stats,
35 bool reno,
36 QuicPacketCount initial_tcp_congestion_window,
37 QuicPacketCount max_congestion_window,
38 QuicConnectionStats* stats);
39 ~TcpCubicSenderBytes() override;
40
41 // Start implementation of SendAlgorithmInterface.
42 void SetNumEmulatedConnections(int num_connections) override;
43 void OnConnectionMigration() override;
44 QuicByteCount GetCongestionWindow() const override;
45 QuicByteCount GetSlowStartThreshold() const override;
46 CongestionControlType GetCongestionControlType() const override;
47 // End implementation of SendAlgorithmInterface.
48
49 QuicByteCount min_congestion_window() const { return min_congestion_window_; }
50
51 protected:
52 // TcpCubicSenderBase methods
53 void SetCongestionWindowFromBandwidthAndRtt(QuicBandwidth bandwidth,
54 QuicTime::Delta rtt) override;
55 void SetCongestionWindowInPackets(QuicPacketCount congestion_window) override;
56 void SetMinCongestionWindowInPackets(
57 QuicPacketCount congestion_window) override;
58 void ExitSlowstart() override;
59 void OnPacketLost(QuicPacketNumber largest_loss,
60 QuicByteCount lost_bytes,
61 QuicByteCount bytes_in_flight) override;
62 void MaybeIncreaseCwnd(QuicPacketNumber acked_packet_number,
63 QuicByteCount acked_bytes,
64 QuicByteCount bytes_in_flight) override;
65 void HandleRetransmissionTimeout() override;
66
67 private:
68 friend class test::TcpCubicSenderBytesPeer;
69
70 CubicBytes cubic_;
71
72 // ACK counter for the Reno implementation.
73 uint64_t num_acked_packets_;
74
75 // Congestion window in bytes.
76 QuicByteCount congestion_window_;
77
78 // Minimum congestion window in bytes.
79 QuicByteCount min_congestion_window_;
80
81 // Maximum congestion window in bytes.
82 QuicByteCount max_congestion_window_;
83
84 // Slow start congestion window in bytes, aka ssthresh.
85 QuicByteCount slowstart_threshold_;
86
87 // Initial TCP congestion window in bytes. This variable can only be set when
88 // this algorithm is created.
89 const QuicByteCount initial_tcp_congestion_window_;
90
91 // Initial maximum TCP congestion window in bytes. This variable can only be
92 // set when this algorithm is created.
93 const QuicByteCount initial_max_tcp_congestion_window_;
94
95 // The minimum window when exiting slow start with large reduction.
96 QuicByteCount min_slow_start_exit_window_;
97
98 DISALLOW_COPY_AND_ASSIGN(TcpCubicSenderBytes);
99 };
100
101 } // namespace net
102
103 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_BYTES_SENDER_H_
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