text: // Copyright (c) 2012 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 receive side congestion algorithm.
  
  #ifndef NET_QUIC_CONGESTION_CONTROL_RECEIVE_ALGORITHM_INTERFACE_H_
  #define NET_QUIC_CONGESTION_CONTROL_RECEIVE_ALGORITHM_INTERFACE_H_
  
  #include "base/basictypes.h"
  #include "net/base/net_export.h"
  #include "net/quic/quic_clock.h"
  #include "net/quic/quic_protocol.h"
  #include "net/quic/quic_time.h"
  
  namespace net {
  
  class NET_EXPORT_PRIVATE ReceiveAlgorithmInterface {
   public:
    static ReceiveAlgorithmInterface* Create(CongestionFeedbackType type);
  
    virtual ~ReceiveAlgorithmInterface() {}
  
    // Returns false if no QuicCongestionFeedbackFrame block is needed.
    // Otherwise fills in feedback and return true.
    virtual bool GenerateCongestionFeedback(
        QuicCongestionFeedbackFrame* feedback) = 0;
  
    // Should be called for each incoming packet.
    // bytes: is the packet size in bytes including IP headers.
    // sequence_number: is the unique sequence number from the QUIC packet header.
    // timestamp: is the sent timestamp from the QUIC packet header.
    virtual void RecordIncomingPacket(QuicByteCount bytes,
                                      QuicPacketSequenceNumber sequence_number,
                                      QuicTime timestamp) = 0;
  };
  
  }  // namespace net
  
  #endif  // NET_QUIC_CONGESTION_CONTROL_RECEIVE_ALGORITHM_INTERFACE_H_
  