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      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 // TCP receiver side congestion algorithm, emulates the behaviour of TCP.
      6 
      7 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_RECEIVER_H_
      8 #define NET_QUIC_CONGESTION_CONTROL_TCP_RECEIVER_H_
      9 
     10 #include "base/basictypes.h"
     11 #include "base/compiler_specific.h"
     12 #include "net/base/net_export.h"
     13 #include "net/quic/congestion_control/receive_algorithm_interface.h"
     14 #include "net/quic/quic_clock.h"
     15 #include "net/quic/quic_protocol.h"
     16 
     17 namespace net {
     18 
     19 class NET_EXPORT_PRIVATE TcpReceiver : public ReceiveAlgorithmInterface {
     20  public:
     21   TcpReceiver();
     22 
     23   // Size of the (currently fixed) receive window.
     24   static const QuicByteCount kReceiveWindowTCP;
     25 
     26   // Start implementation of SendAlgorithmInterface.
     27   virtual bool GenerateCongestionFeedback(
     28       QuicCongestionFeedbackFrame* feedback) OVERRIDE;
     29 
     30   virtual void RecordIncomingPacket(QuicByteCount bytes,
     31                                     QuicPacketSequenceNumber sequence_number,
     32                                     QuicTime timestamp,
     33                                     bool revived) OVERRIDE;
     34 
     35  private:
     36   // We need to keep track of FEC recovered packets.
     37   int accumulated_number_of_recoverd_lost_packets_;
     38   QuicByteCount receive_window_;
     39 
     40   DISALLOW_COPY_AND_ASSIGN(TcpReceiver);
     41 };
     42 
     43 }  // namespace net
     44 #endif  // NET_QUIC_CONGESTION_CONTROL_TCP_RECEIVER_H_
     45