A Discrete-Event Network Simulator
API
tcp-lp.h
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2016 NITK Surathkal
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
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12  * GNU General Public License for more details.
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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  * Authors: Charitha Sangaraju <charitha29193@gmail.com>
19  * Nandita G <gm.nandita@gmail.com>
20  * Mohit P. Tahiliani <tahiliani@nitk.edu.in>
21  *
22  */
23 
24 #ifndef TCPLP_H
25 #define TCPLP_H
26 
27 #include "tcp-congestion-ops.h"
28 
29 #include "ns3/traced-value.h"
30 
31 namespace ns3 {
32 
33 class TcpSocketState;
34 
40 class TcpLp : public TcpNewReno
41 {
42 public:
48  static TypeId GetTypeId (void);
49 
54  TcpLp (void);
55 
61  TcpLp (const TcpLp& sock);
62 
63  virtual ~TcpLp (void);
64 
75  virtual void PktsAcked (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked,
76  const Time& rtt);
77 
78  virtual std::string GetName () const;
79 
80  virtual Ptr<TcpCongestionOps> Fork ();
81 
82 protected:
89  virtual void CongestionAvoidance (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked);
90 
91 private:
96  enum State
97  {
98  LP_VALID_OWD = (1 << 1),
99  LP_WITHIN_THR = (1 << 3),
100  LP_WITHIN_INF = (1 << 4),
101  };
102 
103  uint32_t m_flag;
104  uint32_t m_sOwd;
105  uint32_t m_owdMin;
106  uint32_t m_owdMax;
107  uint32_t m_owdMaxRsv;
110 
111 private:
118  uint32_t OwdCalculator (Ptr<TcpSocketState> tcb);
119 
125  void RttSample (Ptr<TcpSocketState> tcb);
126 };
127 
128 } // namespace ns3
129 
130 #endif // TCPLP_H
TCP-LP (Low Priority) congestion control algorithm.
Definition: tcp-lp.h:41
Time m_inference
Current inference period.
Definition: tcp-lp.h:109
uint32_t m_flag
TcpLp state flag.
Definition: tcp-lp.h:103
uint32_t m_owdMax
Maximum One-Way Delay.
Definition: tcp-lp.h:106
virtual Ptr< TcpCongestionOps > Fork()
Copy the congestion control algorithm across sockets.
Definition: tcp-lp.cc:77
void RttSample(Ptr< TcpSocketState > tcb)
Estimates minimum and maximum One-Way Delays and calculates the smoothed One-Way Delay.
Definition: tcp-lp.cc:118
uint32_t m_owdMaxRsv
Reserved Maximum One-Way Delay.
Definition: tcp-lp.h:107
virtual ~TcpLp(void)
Definition: tcp-lp.cc:71
virtual void CongestionAvoidance(Ptr< TcpSocketState > tcb, uint32_t segmentsAcked)
Invokes Congestion Avoidance of TcpNewReno if TcpLp is not within inference.
Definition: tcp-lp.cc:83
static TypeId GetTypeId(void)
Get the type ID.
Definition: tcp-lp.cc:35
uint32_t m_owdMin
Minimum One-Way Delay.
Definition: tcp-lp.h:105
State
Describes the state of TcpLp.
Definition: tcp-lp.h:97
@ LP_WITHIN_INF
TcpLp is within Inference.
Definition: tcp-lp.h:100
@ LP_VALID_OWD
Calculated One-Way Delay is valid.
Definition: tcp-lp.h:98
@ LP_WITHIN_THR
TcpLp is within Threshold.
Definition: tcp-lp.h:99
uint32_t OwdCalculator(Ptr< TcpSocketState > tcb)
Calculates One-Way Delay using Sender and Receiver timestamps.
Definition: tcp-lp.cc:94
TcpLp(void)
Creates an unbound tcp socket.
Definition: tcp-lp.cc:45
virtual void PktsAcked(Ptr< TcpSocketState > tcb, uint32_t segmentsAcked, const Time &rtt)
Timing information on received ACK.
Definition: tcp-lp.cc:168
Time m_lastDrop
Last time when cwnd was reduced.
Definition: tcp-lp.h:108
uint32_t m_sOwd
Smoothed One-Way Delay.
Definition: tcp-lp.h:104
virtual std::string GetName() const
Get the name of the congestion control algorithm.
Definition: tcp-lp.cc:234
The NewReno implementation.
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:103
a unique identifier for an interface.
Definition: type-id.h:59
Every class exported by the ns3 library is enclosed in the ns3 namespace.