blob: 06f62568f06cc5c80c4873d6cf2c85c7e3b03235 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// 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_;
};
} // namespace net
#endif // NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_
|
