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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011 University of California, Los Angeles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
*/
#include "ndn-pit-entry.h"
#include "ns3/ndn-pit.h"
#include "ns3/ndn-fib.h"
#include "ns3/ndn-name.h"
#include "ns3/ndn-interest.h"
#include "ns3/packet.h"
#include "ns3/simulator.h"
#include "ns3/log.h"
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
#include <boost/foreach.hpp>
namespace ll = boost::lambda;
NS_LOG_COMPONENT_DEFINE ("ndn.pit.Entry");
namespace ns3 {
namespace ndn {
namespace pit {
Entry::Entry (Pit &container,
Ptr<const Interest> header,
Ptr<fib::Entry> fibEntry)
: m_container (container)
, m_interest (header)
, m_fibEntry (fibEntry)
, m_maxRetxCount (0)
{
NS_LOG_FUNCTION (this);
// UpdateLifetime is (and should) be called from the forwarding strategy
UpdateLifetime ((!header->GetInterestLifetime ().IsZero ()?
header->GetInterestLifetime ():
Seconds (1.0)));
}
Entry::~Entry ()
{
NS_LOG_FUNCTION (GetPrefix ());
}
void
Entry::UpdateLifetime (const Time &offsetTime)
{
NS_LOG_FUNCTION (this);
Time newExpireTime = Simulator::Now () + (m_container.GetMaxPitEntryLifetime ().IsZero () ?
offsetTime :
std::min (m_container.GetMaxPitEntryLifetime (), offsetTime));
if (newExpireTime > m_expireTime)
m_expireTime = newExpireTime;
NS_LOG_INFO (this->GetPrefix () << ", Updated lifetime to " << m_expireTime.ToDouble (Time::S) << "s, " << (m_expireTime-Simulator::Now ()).ToDouble (Time::S) << "s left");
}
void
Entry::OffsetLifetime (const Time &offsetTime)
{
m_expireTime += offsetTime;
if (m_expireTime < Simulator::Now ())
{
m_expireTime = Simulator::Now ();
}
NS_LOG_INFO (this->GetPrefix () << ", Offsetting lifetime to " << m_expireTime.ToDouble (Time::S) << "s, " << (m_expireTime-Simulator::Now ()).ToDouble (Time::S) << "s left");
}
const Name &
Entry::GetPrefix () const
{
return m_interest->GetName ();
}
const Time &
Entry::GetExpireTime () const
{
return m_expireTime;
}
bool
Entry::IsNonceSeen (uint32_t nonce) const
{
return m_seenNonces.find (nonce) != m_seenNonces.end ();
}
void
Entry::AddSeenNonce (uint32_t nonce)
{
m_seenNonces.insert (nonce);
}
Entry::in_iterator
Entry::AddIncoming (Ptr<Face> face)
{
std::pair<in_iterator,bool> ret =
m_incoming.insert (IncomingFace (face));
// NS_ASSERT_MSG (ret.second, "Something is wrong");
return ret.first;
}
void
Entry::RemoveIncoming (Ptr<Face> face)
{
m_incoming.erase (face);
}
void
Entry::ClearIncoming ()
{
m_incoming.clear ();
}
Entry::out_iterator
Entry::AddOutgoing (Ptr<Face> face)
{
std::pair<out_iterator,bool> ret =
m_outgoing.insert (OutgoingFace (face));
if (!ret.second)
{ // outgoing face already exists
const_cast<OutgoingFace&>(*ret.first).UpdateOnRetransmit ();
// m_outgoing.modify (ret.first,
// ll::bind (&OutgoingFace::UpdateOnRetransmit, ll::_1));
}
return ret.first;
}
void
Entry::ClearOutgoing ()
{
m_outgoing.clear ();
}
void
Entry::RemoveAllReferencesToFace (Ptr<Face> face)
{
in_iterator incoming = m_incoming.find (face);
if (incoming != m_incoming.end ())
m_incoming.erase (incoming);
out_iterator outgoing =
m_outgoing.find (face);
if (outgoing != m_outgoing.end ())
m_outgoing.erase (outgoing);
}
// void
// Entry::SetWaitingInVain (Entry::out_iterator face)
// {
// NS_LOG_DEBUG (boost::cref (*face->m_face));
// m_outgoing.modify (face,
// (&ll::_1)->*&EntryOutgoingFace::m_waitingInVain = true);
// }
void
Entry::SetWaitingInVain (Ptr<Face> face)
{
// NS_LOG_DEBUG (boost::cref (*face->m_face));
out_iterator item = m_outgoing.find (face);
if (item == m_outgoing.end ())
return;
const_cast<OutgoingFace&>(*item).m_waitingInVain = true;
// m_outgoing.modify (item,
// (&ll::_1)->*&OutgoingFace::m_waitingInVain = true);
}
bool
Entry::AreAllOutgoingInVain () const
{
NS_LOG_DEBUG (m_outgoing.size ());
bool inVain = true;
std::for_each (m_outgoing.begin (), m_outgoing.end (),
ll::var(inVain) &= (&ll::_1)->*&OutgoingFace::m_waitingInVain);
NS_LOG_DEBUG ("inVain " << inVain);
return inVain;
}
bool
Entry::AreTherePromisingOutgoingFacesExcept (Ptr<Face> face) const
{
bool inVain = true;
std::for_each (m_outgoing.begin (), m_outgoing.end (),
ll::var(inVain) &=
((&ll::_1)->*&OutgoingFace::m_face == face ||
(&ll::_1)->*&OutgoingFace::m_waitingInVain));
return !inVain;
}
void
Entry::IncreaseAllowedRetxCount ()
{
if (Simulator::Now () - m_lastRetransmission >= MilliSeconds (100))
{
// cheat:
// don't allow retransmission faster than every 100ms
m_maxRetxCount++;
m_lastRetransmission = Simulator::Now ();
}
}
Ptr<fib::Entry>
Entry::GetFibEntry ()
{
return m_fibEntry;
};
const Entry::in_container &
Entry::GetIncoming () const
{
return m_incoming;
}
const Entry::out_container &
Entry::GetOutgoing () const
{
return m_outgoing;
}
uint32_t
Entry::GetOutgoingCount () const
{
return m_outgoing.size ();
}
uint32_t
Entry::GetMaxRetxCount () const
{
return m_maxRetxCount;
}
Ptr<const Interest>
Entry::GetInterest () const
{
return m_interest;
}
std::ostream& operator<< (std::ostream& os, const Entry &entry)
{
os << "Prefix: " << entry.GetPrefix () << "\n";
os << "In: ";
bool first = true;
BOOST_FOREACH (const IncomingFace &face, entry.m_incoming)
{
if (!first)
os << ",";
else
first = false;
os << *face.m_face;
}
os << "\nOut: ";
first = true;
BOOST_FOREACH (const OutgoingFace &face, entry.m_outgoing)
{
if (!first)
os << ",";
else
first = false;
os << *face.m_face;
}
os << "\nNonces: ";
first = true;
BOOST_FOREACH (uint32_t nonce, entry.m_seenNonces)
{
if (!first)
os << ",";
else
first = false;
os << nonce;
}
return os;
}
} // namespace pit
} // namespace ndn
} // namespace ns3