A Discrete-Event Network Simulator
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ipv6-pmtu-cache.cc
Go to the documentation of this file.
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2013 Universita' di Firenze
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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: Tommaso Pecorella <tommaso.pecorella@unifi.it>
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*/
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#include "
ipv6-pmtu-cache.h
"
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#include "ns3/log.h"
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#include "ns3/simulator.h"
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NS_LOG_COMPONENT_DEFINE
(
"Ipv6PmtuCache"
);
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namespace
ns3 {
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NS_OBJECT_ENSURE_REGISTERED
(Ipv6PmtuCache);
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TypeId
Ipv6PmtuCache::GetTypeId
()
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{
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static
TypeId
tid =
TypeId
(
"ns3::Ipv6PmtuCache"
)
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.
SetParent
<
Object
> ()
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.AddAttribute (
"CacheExpiryTime"
,
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"Validity time for a Path MTU entry. Default is 10 minutes, minimum is 5 minutes."
,
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TimeValue
(Seconds (60 * 10)),
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MakeTimeAccessor (&
Ipv6PmtuCache::m_validityTime
),
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MakeTimeChecker
(
Time
(Seconds (60 * 5))))
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;
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return
tid;
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}
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Ipv6PmtuCache::Ipv6PmtuCache
()
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{
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}
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Ipv6PmtuCache::~Ipv6PmtuCache
()
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{
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}
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void
Ipv6PmtuCache::DoDispose
()
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{
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for
(
pathMtuTimerIter
iter =
m_pathMtuTimer
.begin (); iter !=
m_pathMtuTimer
.end (); iter++)
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{
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iter->second.Cancel ();
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}
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m_pathMtuTimer
.clear ();
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m_pathMtu
.clear ();
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}
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uint32_t
Ipv6PmtuCache::GetPmtu
(
Ipv6Address
dst)
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{
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NS_LOG_FUNCTION
(
this
<< dst);
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if
(
m_pathMtu
.find (dst) !=
m_pathMtu
.end ())
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{
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return
m_pathMtu
[dst];
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}
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return
0;
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}
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void
Ipv6PmtuCache::SetPmtu
(
Ipv6Address
dst, uint32_t pmtu)
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{
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NS_LOG_FUNCTION
(
this
<< dst << pmtu);
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m_pathMtu
[dst] = pmtu;
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if
(
m_pathMtuTimer
.find (dst) !=
m_pathMtuTimer
.end ())
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{
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m_pathMtuTimer
[dst].Cancel ();
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}
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EventId
pMtuTimer;
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pMtuTimer =
Simulator::Schedule
(
m_validityTime
, &
Ipv6PmtuCache::ClearPmtu
,
this
, dst);
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m_pathMtuTimer
[dst] = pMtuTimer;
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}
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Time
Ipv6PmtuCache::GetPmtuValidityTime
()
const
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{
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NS_LOG_FUNCTION
(
this
);
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return
m_validityTime
;
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}
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bool
Ipv6PmtuCache::SetPmtuValidityTime
(
Time
validity)
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{
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NS_LOG_FUNCTION
(
this
<< validity);
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if
(validity > Seconds (60 * 5))
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{
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m_validityTime
= validity;
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return
true
;
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}
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NS_LOG_LOGIC
(
"rejecting a PMTU validity timer lesser than 5 minutes"
);
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return
false
;
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}
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void
Ipv6PmtuCache::ClearPmtu
(
Ipv6Address
dst)
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{
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NS_LOG_FUNCTION
(
this
<< dst);
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m_pathMtu
.erase (dst);
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m_pathMtuTimer
.erase (dst);
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}
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}
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src
internet
model
ipv6-pmtu-cache.cc
Generated on Fri Aug 30 2013 01:42:52 for ns-3 by
1.8.1.2