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
3// found in the LICENSE file.
4//
5// The pure virtual class for send side loss detection algorithm.
6
7#ifndef NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_
8#define NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_
9
10#include "base/basictypes.h"
11#include "net/quic/quic_protocol.h"
12#include "net/quic/quic_time.h"
13
14namespace net {
15
16class QuicUnackedPacketMap;
17class RttStats;
18
19class NET_EXPORT_PRIVATE LossDetectionInterface {
20 public:
21  // Creates a TCP loss detector.
22  static LossDetectionInterface* Create(LossDetectionType loss_type);
23
24  virtual ~LossDetectionInterface() {}
25
26  virtual LossDetectionType GetLossDetectionType() const = 0;
27
28  // Called when a new ack arrives or the loss alarm fires.
29  virtual SequenceNumberSet DetectLostPackets(
30      const QuicUnackedPacketMap& unacked_packets,
31      const QuicTime& time,
32      QuicPacketSequenceNumber largest_observed,
33      const RttStats& rtt_stats) = 0;
34
35  // Get the time the LossDetectionAlgorithm wants to re-evaluate losses.
36  // Returns QuicTime::Zero if no alarm needs to be set.
37  virtual QuicTime GetLossTimeout() const = 0;
38};
39
40}  // namespace net
41
42#endif  // NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_
43