A Discrete-Event Network Simulator
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msdu-standard-aggregator.cc
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2009 MIRKO BANCHI
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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: Mirko Banchi <mk.banchi@gmail.com>
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*/
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#include "ns3/log.h"
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#include "ns3/uinteger.h"
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#include "amsdu-subframe-header.h"
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#include "msdu-standard-aggregator.h"
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NS_LOG_COMPONENT_DEFINE
(
"MsduStandardAggregator"
);
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namespace
ns3 {
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NS_OBJECT_ENSURE_REGISTERED (MsduStandardAggregator);
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TypeId
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MsduStandardAggregator::GetTypeId (
void
)
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{
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static
TypeId tid = TypeId (
"ns3::MsduStandardAggregator"
)
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.SetParent<MsduAggregator> ()
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.AddConstructor<MsduStandardAggregator> ()
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.AddAttribute (
"MaxAmsduSize"
,
"Max length in byte of an A-MSDU"
,
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UintegerValue (7935),
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MakeUintegerAccessor (&MsduStandardAggregator::m_maxAmsduLength),
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MakeUintegerChecker<uint32_t> ())
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;
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return
tid;
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}
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MsduStandardAggregator::MsduStandardAggregator ()
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{
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}
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MsduStandardAggregator::~MsduStandardAggregator ()
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{
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}
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bool
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MsduStandardAggregator::Aggregate
(
Ptr<const Packet>
packet,
Ptr<Packet>
aggregatedPacket,
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Mac48Address
src,
Mac48Address
dest)
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{
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NS_LOG_FUNCTION
(
this
);
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Ptr<Packet>
currentPacket;
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AmsduSubframeHeader
currentHdr;
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uint32_t padding = CalculatePadding (aggregatedPacket);
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uint32_t actualSize = aggregatedPacket->
GetSize
();
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if
((14 + packet->
GetSize
() + actualSize + padding) <= m_maxAmsduLength)
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{
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if
(padding)
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{
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Ptr<Packet>
pad = Create<Packet> (padding);
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aggregatedPacket->
AddAtEnd
(pad);
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}
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currentHdr.SetDestinationAddr (dest);
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currentHdr.SetSourceAddr (src);
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currentHdr.SetLength (packet->
GetSize
());
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currentPacket = packet->
Copy
();
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currentPacket->
AddHeader
(currentHdr);
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aggregatedPacket->
AddAtEnd
(currentPacket);
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return
true
;
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}
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return
false
;
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}
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uint32_t
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MsduStandardAggregator::CalculatePadding (
Ptr<const Packet>
packet)
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{
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return
(4 - (packet->
GetSize
() % 4 )) % 4;
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}
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}
// namespace ns3
ns3::Ptr< const Packet >
NS_LOG_FUNCTION
#define NS_LOG_FUNCTION(parameters)
Definition:
log.h:311
NS_LOG_COMPONENT_DEFINE
#define NS_LOG_COMPONENT_DEFINE(name)
Definition:
log.h:122
ns3::Packet::GetSize
uint32_t GetSize(void) const
Definition:
packet.h:620
ns3::MsduStandardAggregator::Aggregate
virtual bool Aggregate(Ptr< const Packet > packet, Ptr< Packet > aggregatedPacket, Mac48Address src, Mac48Address dest)
Definition:
msdu-standard-aggregator.cc:55
ns3::Packet::AddAtEnd
void AddAtEnd(Ptr< const Packet > packet)
Definition:
packet.cc:334
ns3::Packet::Copy
Ptr< Packet > Copy(void) const
Definition:
packet.cc:131
ns3::Mac48Address
an EUI-48 address
Definition:
mac48-address.h:41
ns3::AmsduSubframeHeader
Definition:
amsdu-subframe-header.h:33
ns3::Packet::AddHeader
void AddHeader(const Header &header)
Definition:
packet.cc:270
src
wifi
model
msdu-standard-aggregator.cc
Generated on Sun Mar 16 2014 11:25:12 for ns-3 by
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