A Discrete-Event Network Simulator
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tcp-rx-buffer.h
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2010 Adrian Sai-wah Tam
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Adrian Sai-wah Tam <adrian.sw.tam@gmail.com>
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*/
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#ifndef TCP_RX_BUFFER_H
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#define TCP_RX_BUFFER_H
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#include <map>
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#include "ns3/traced-value.h"
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#include "ns3/trace-source-accessor.h"
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#include "ns3/sequence-number.h"
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#include "ns3/ptr.h"
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#include "ns3/tcp-header.h"
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namespace
ns3 {
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class
Packet;
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class
TcpRxBuffer
:
public
Object
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{
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public
:
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static
TypeId
GetTypeId (
void
);
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TcpRxBuffer
(uint32_t n = 0);
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virtual
~
TcpRxBuffer
();
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// Accessors
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SequenceNumber32
NextRxSequence (
void
)
const
;
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SequenceNumber32
MaxRxSequence (
void
)
const
;
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void
IncNextRxSequence (
void
);
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void
SetNextRxSequence (
const
SequenceNumber32
& s);
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void
SetFinSequence (
const
SequenceNumber32
& s);
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uint32_t MaxBufferSize (
void
)
const
;
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void
SetMaxBufferSize (uint32_t s);
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uint32_t Size (
void
)
const
;
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uint32_t Available ()
const
;
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bool
Finished (
void
);
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bool
Add
(
Ptr<Packet>
p,
TcpHeader
const
& tcph);
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Ptr<Packet>
Extract
(uint32_t maxSize);
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public
:
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typedef
std::map<SequenceNumber32, Ptr<Packet> >::iterator BufIterator;
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TracedValue<SequenceNumber32>
m_nextRxSeq;
//< Seqnum of the first missing byte in data (RCV.NXT)
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SequenceNumber32
m_finSeq;
//< Seqnum of the FIN packet
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bool
m_gotFin;
//< Did I received FIN packet?
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uint32_t m_size;
//< Number of total data bytes in the buffer, not necessarily contiguous
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uint32_t m_maxBuffer;
//< Upper bound of the number of data bytes in buffer (RCV.WND)
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uint32_t m_availBytes;
//< Number of bytes available to read, i.e. contiguous block at head
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std::map<SequenceNumber32, Ptr<Packet> > m_data;
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//< Corresponding data (may be null)
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};
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}
//namepsace ns3
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#endif
/* TCP_RX_BUFFER_H */
ns3::Ptr< Packet >
ns3::TcpRxBuffer::Add
bool Add(Ptr< Packet > p, TcpHeader const &tcph)
Definition:
tcp-rx-buffer.cc:137
ns3::TracedValue< SequenceNumber32 >
ns3::TcpRxBuffer
class for the reordering buffer that keeps the data from lower layer, i.e. TcpL4Protocol, sent to the application
Definition:
tcp-rx-buffer.h:40
ns3::TcpRxBuffer::Extract
Ptr< Packet > Extract(uint32_t maxSize)
Definition:
tcp-rx-buffer.cc:220
ns3::SequenceNumber< uint32_t, int32_t >
ns3::TcpHeader
Header for the Transmission Control Protocol.
Definition:
tcp-header.h:43
ns3::Object
a base class which provides memory management and object aggregation
Definition:
object.h:63
ns3::TypeId
a unique identifier for an interface.
Definition:
type-id.h:44
src
internet
model
tcp-rx-buffer.h
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