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// 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.
//
// The pure virtual class for send side loss detection algorithm.
#ifndef NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_
#define NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_
#include "base/basictypes.h"
#include "net/quic/quic_protocol.h"
#include "net/quic/quic_time.h"
namespace net {
class QuicUnackedPacketMap;
class NET_EXPORT_PRIVATE LossDetectionInterface {
public:
// Creates a TCP loss detector.
static LossDetectionInterface* Create();
virtual ~LossDetectionInterface() {}
// Called when a new ack arrives or the loss alarm fires.
virtual SequenceNumberSet DetectLostPackets(
const QuicUnackedPacketMap& unacked_packets,
const QuicTime& time,
QuicPacketSequenceNumber largest_observed,
QuicTime::Delta srtt,
QuicTime::Delta latest_rtt) = 0;
// Get the time the LossDetectionAlgorithm wants to re-evaluate losses.
// Returns QuicTime::Zero if no alarm needs to be set.
virtual QuicTime GetLossTimeout() const = 0;
};
} // namespace net
#endif // NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_
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