1// Copyright (c) 2012 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 receive side congestion algorithm.
6
7#ifndef NET_QUIC_CONGESTION_CONTROL_RECEIVE_ALGORITHM_INTERFACE_H_
8#define NET_QUIC_CONGESTION_CONTROL_RECEIVE_ALGORITHM_INTERFACE_H_
9
10#include "base/basictypes.h"
11#include "net/base/net_export.h"
12#include "net/quic/quic_clock.h"
13#include "net/quic/quic_protocol.h"
14#include "net/quic/quic_time.h"
15
16namespace net {
17
18class NET_EXPORT_PRIVATE ReceiveAlgorithmInterface {
19 public:
20  static ReceiveAlgorithmInterface* Create(CongestionFeedbackType type);
21
22  virtual ~ReceiveAlgorithmInterface() {}
23
24  // Returns false if no QuicCongestionFeedbackFrame block is needed.
25  // Otherwise fills in feedback and return true.
26  virtual bool GenerateCongestionFeedback(
27      QuicCongestionFeedbackFrame* feedback) = 0;
28
29  // Should be called for each incoming packet.
30  // bytes: is the packet size in bytes including IP headers.
31  // sequence_number: is the unique sequence number from the QUIC packet header.
32  // timestamp: is the sent timestamp from the QUIC packet header.
33  virtual void RecordIncomingPacket(QuicByteCount bytes,
34                                    QuicPacketSequenceNumber sequence_number,
35                                    QuicTime timestamp) = 0;
36};
37
38}  // namespace net
39
40#endif  // NET_QUIC_CONGESTION_CONTROL_RECEIVE_ALGORITHM_INTERFACE_H_
41