net/quic/congestion_control/loss_detection_interface.h

   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
  14 namespace net {
  15
  16 class QuicUnackedPacketMap;
  17 class RttStats;
  18
  19 class 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_