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tcp-tahoe.h
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2010 Adrian Sai-wah Tam
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Adrian Sai-wah Tam <adrian.sw.tam@gmail.com>
19  */
20 
21 #ifndef TCP_TAHOE_H
22 #define TCP_TAHOE_H
23 
24 #include "tcp-socket-base.h"
25 
26 namespace ns3 {
27 
42 class TcpTahoe : public TcpSocketBase
43 {
44 public:
45  static TypeId GetTypeId (void);
49  TcpTahoe (void);
50  TcpTahoe (const TcpTahoe& sock);
51  virtual ~TcpTahoe (void);
52 
53  // From TcpSocketBase
54  virtual int Connect (const Address &address);
55  virtual int Listen (void);
56 
57 protected:
58  virtual uint32_t Window (void); // Return the max possible number of unacked bytes
59  virtual Ptr<TcpSocketBase> Fork (void); // Call CopyObject<TcpTahoe> to clone me
60  virtual void NewAck (SequenceNumber32 const& seq); // Inc cwnd and call NewAck() of parent
61  virtual void DupAck (const TcpHeader& t, uint32_t count); // Treat 3 dupack as timeout
62  virtual void Retransmit (void); // Retransmit time out
63 
64  // Implementing ns3::TcpSocket -- Attribute get/set
65  virtual void SetSegSize (uint32_t size);
66  virtual void SetSSThresh (uint32_t threshold);
67  virtual uint32_t GetSSThresh (void) const;
68  virtual void SetInitialCwnd (uint32_t cwnd);
69  virtual uint32_t GetInitialCwnd (void) const;
70 private:
71  void InitializeCwnd (void); // set m_cWnd when connection starts
72 
73 protected:
74  TracedValue<uint32_t> m_cWnd; //< Congestion window
75  uint32_t m_ssThresh; //< Slow Start Threshold
76  uint32_t m_initialCWnd; //< Initial cWnd value
77  uint32_t m_retxThresh; //< Fast Retransmit threshold
78 };
79 
80 } // namespace ns3
81 
82 #endif /* TCP_TAHOE_H */