A Discrete-Event Network Simulator
API
tcp-westwood.h
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2/*
3 * Copyright (c) 2013 ResiliNets, ITTC, University of Kansas
4 *
5 * This program is free software; you can redistribute it and/or modify
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14 * You should have received a copy of the GNU General Public License
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16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Authors: Siddharth Gangadhar <siddharth@ittc.ku.edu>, Truc Anh N. Nguyen <annguyen@ittc.ku.edu>,
19 * and Greeshma Umapathi
20 *
21 * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
22 * ResiliNets Research Group https://resilinets.org/
23 * Information and Telecommunication Technology Center (ITTC)
24 * and Department of Electrical Engineering and Computer Science
25 * The University of Kansas Lawrence, KS USA.
26 *
27 * Work supported in part by NSF FIND (Future Internet Design) Program
28 * under grant CNS-0626918 (Postmodern Internet Architecture),
29 * NSF grant CNS-1050226 (Multilayer Network Resilience Analysis and Experimentation on GENI),
30 * US Department of Defense (DoD), and ITTC at The University of Kansas.
31 */
32
33#ifndef TCP_WESTWOOD_H
34#define TCP_WESTWOOD_H
35
36#include "tcp-congestion-ops.h"
37#include "ns3/data-rate.h"
38#include "ns3/tcp-recovery-ops.h"
39#include "ns3/traced-value.h"
40#include "ns3/event-id.h"
41
42namespace ns3 {
43
44class Time;
45
66class TcpWestwood : public TcpNewReno
67{
68public:
73 static TypeId GetTypeId (void);
74
75 TcpWestwood (void);
80 TcpWestwood (const TcpWestwood& sock);
81 virtual ~TcpWestwood (void);
82
87 {
90 };
91
96 {
98 TUSTIN
99 };
100
102 uint32_t bytesInFlight);
103
104 virtual void PktsAcked (Ptr<TcpSocketState> tcb, uint32_t packetsAcked,
105 const Time& rtt);
106
107 virtual Ptr<TcpCongestionOps> Fork ();
108
109private:
115 void UpdateAckedSegments (int acked);
116
123 void EstimateBW (const Time& rtt, Ptr<TcpSocketState> tcb);
124
125protected:
131
136};
137
138} // namespace ns3
139
140#endif /* TCP_WESTWOOD_H */
Class for representing data rates.
Definition: data-rate.h:89
An identifier for simulation events.
Definition: event-id.h:54
Smart pointer class similar to boost::intrusive_ptr.
Definition: ptr.h:78
The NewReno implementation.
An implementation of TCP Westwood and Westwood+.
Definition: tcp-westwood.h:67
TracedValue< DataRate > m_currentBW
Current value of the estimated BW.
Definition: tcp-westwood.h:126
enum ProtocolType m_pType
0 for Westwood, 1 for Westwood+
Definition: tcp-westwood.h:129
enum FilterType m_fType
0 for none, 1 for Tustin
Definition: tcp-westwood.h:130
void UpdateAckedSegments(int acked)
Update the total number of acknowledged packets during the current RTT.
bool m_IsCount
Start keeping track of m_ackedSegments for Westwood+ if TRUE.
Definition: tcp-westwood.h:133
DataRate m_lastSampleBW
Last bandwidth sample.
Definition: tcp-westwood.h:127
void EstimateBW(const Time &rtt, Ptr< TcpSocketState > tcb)
Estimate the network's bandwidth.
virtual void PktsAcked(Ptr< TcpSocketState > tcb, uint32_t packetsAcked, const Time &rtt)
Timing information on received ACK.
Definition: tcp-westwood.cc:97
FilterType
Filter type (None or Tustin)
Definition: tcp-westwood.h:96
DataRate m_lastBW
Last bandwidth sample after being filtered.
Definition: tcp-westwood.h:128
virtual ~TcpWestwood(void)
Definition: tcp-westwood.cc:92
Time m_lastAck
The last ACK time.
Definition: tcp-westwood.h:135
uint32_t m_ackedSegments
The number of segments ACKed between RTTs.
Definition: tcp-westwood.h:132
virtual uint32_t GetSsThresh(Ptr< const TcpSocketState > tcb, uint32_t bytesInFlight)
Get the slow start threshold after a loss event.
ProtocolType
Protocol variant (Westwood or Westwood+)
Definition: tcp-westwood.h:87
virtual Ptr< TcpCongestionOps > Fork()
Copy the congestion control algorithm across sockets.
EventId m_bwEstimateEvent
The BW estimation event for Westwood+.
Definition: tcp-westwood.h:134
static TypeId GetTypeId(void)
Get the type ID.
Definition: tcp-westwood.cc:47
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:104
Trace classes with value semantics.
Definition: traced-value.h:117
a unique identifier for an interface.
Definition: type-id.h:59
void(* Time)(Time oldValue, Time newValue)
TracedValue callback signature for Time.
Definition: nstime.h:794
Every class exported by the ns3 library is enclosed in the ns3 namespace.