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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: Ilya Moiseenko <iliamo@cs.ucla.edu>
*/
#include "ccnx-consumer.h"
#include "ns3/ptr.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
#include "ns3/packet.h"
#include "ns3/callback.h"
#include "ns3/string.h"
#include "ns3/boolean.h"
#include "ns3/uinteger.h"
#include "ns3/double.h"
#include "ns3/ccnx.h"
#include "../model/ccnx-local-face.h"
#include "ns3/ccnx-interest-header.h"
#include "ns3/ccnx-content-object-header.h"
#include <boost/ref.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
namespace ll = boost::lambda;
NS_LOG_COMPONENT_DEFINE ("CcnxConsumer");
namespace ns3
{
NS_OBJECT_ENSURE_REGISTERED (CcnxConsumer);
TypeId
CcnxConsumer::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::CcnxConsumer")
.SetParent<CcnxApp> ()
.AddConstructor<CcnxConsumer> ()
.AddAttribute ("StartSeq", "Initial sequence number",
IntegerValue (0),
MakeIntegerAccessor(&CcnxConsumer::m_seq),
MakeIntegerChecker<int32_t>())
.AddAttribute ("Size", "Amount of data in megabytes to request (relies on PayloadSize parameter)",
DoubleValue (-1), // don't impose limit by default
MakeDoubleAccessor (&CcnxConsumer::GetMaxSize, &CcnxConsumer::SetMaxSize),
MakeDoubleChecker<double> ())
///////
.AddAttribute ("PayloadSize", "Average size of content object size (to calculate interest generation rate)",
UintegerValue (1040),
MakeUintegerAccessor (&CcnxConsumer::GetPayloadSize, &CcnxConsumer::SetPayloadSize),
MakeUintegerChecker<uint32_t>())
.AddAttribute ("MeanRate", "Mean data packet rate (relies on the PayloadSize parameter)",
StringValue ("100Kbps"),
MakeDataRateAccessor (&CcnxConsumer::GetDesiredRate, &CcnxConsumer::SetDesiredRate),
MakeDataRateChecker ())
///////
.AddAttribute ("Prefix","CcnxName of the Interest",
StringValue ("/"),
MakeCcnxNameComponentsAccessor (&CcnxConsumer::m_interestName),
MakeCcnxNameComponentsChecker ())
.AddAttribute ("LifeTime", "LifeTime for interest packet",
StringValue ("2s"),
MakeTimeAccessor (&CcnxConsumer::m_interestLifeTime),
MakeTimeChecker ())
.AddAttribute ("MinSuffixComponents", "MinSuffixComponents",
IntegerValue(-1),
MakeIntegerAccessor(&CcnxConsumer::m_minSuffixComponents),
MakeIntegerChecker<int32_t>())
.AddAttribute ("MaxSuffixComponents", "MaxSuffixComponents",
IntegerValue(-1),
MakeIntegerAccessor(&CcnxConsumer::m_maxSuffixComponents),
MakeIntegerChecker<int32_t>())
.AddAttribute ("ChildSelector", "ChildSelector",
BooleanValue(false),
MakeBooleanAccessor(&CcnxConsumer::m_childSelector),
MakeBooleanChecker())
.AddAttribute ("Exclude", "only simple name matching is supported (use CcnxNameComponents)",
CcnxNameComponentsValue (),
MakeCcnxNameComponentsAccessor (&CcnxConsumer::m_exclude),
MakeCcnxNameComponentsChecker ())
.AddAttribute ("RTO",
"Initial retransmission timeout",
StringValue ("1s"),
MakeTimeAccessor (&CcnxConsumer::m_rto),
MakeTimeChecker ())
.AddAttribute ("RetxTimer",
"Timeout defining how frequent retransmission timeouts should be checked",
StringValue ("1s"),
MakeTimeAccessor (&CcnxConsumer::GetRetxTimer, &CcnxConsumer::SetRetxTimer),
MakeTimeChecker ())
.AddTraceSource ("TransmittedInterests", "TransmittedInterests",
MakeTraceSourceAccessor (&CcnxConsumer::m_transmittedInterests))
;
return tid;
}
CcnxConsumer::CcnxConsumer ()
: m_rand (0, std::numeric_limits<uint32_t>::max ())
, m_desiredRate ("10Kbps")
, m_payloadSize (1040)
, m_seq (0)
{
NS_LOG_FUNCTION_NOARGS ();
UpdateMean (); // not necessary (will be called by ns3 object system anyways), but doesn't hurt
}
void
CcnxConsumer::SetRetxTimer (Time retxTimer)
{
m_retxTimer = retxTimer;
if (m_retxEvent.IsRunning ())
m_retxEvent.Cancel (); // cancel any scheduled cleanup events
// schedule even with new timeout
m_retxEvent = Simulator::Schedule (m_retxTimer,
&CcnxConsumer::CheckRetxTimeout, this);
}
Time
CcnxConsumer::GetRetxTimer () const
{
return m_retxTimer;
}
void
CcnxConsumer::CheckRetxTimeout ()
{
Time now = Simulator::Now ();
boost::mutex::scoped_lock (m_seqTimeoutsGuard);
while (!m_seqTimeouts.empty ())
{
SeqTimeoutsContainer::index<i_timestamp>::type::iterator entry =
m_seqTimeouts.get<i_timestamp> ().begin ();
if (entry->time + m_rto <= now) // timeout expired?
{
m_retxSeqs.insert (entry->seq);
m_seqTimeouts.get<i_timestamp> ().modify (entry,
ll::bind(&SeqTimeout::time, ll::_1) = now);
}
else
break; // nothing else to do. All later packets need not be retransmitted
}
if (m_retxSeqs.size () > 0)
{
ScheduleNextPacket ();
}
m_retxEvent = Simulator::Schedule (m_retxTimer,
&CcnxConsumer::CheckRetxTimeout, this);
}
void
CcnxConsumer::UpdateMean ()
{
double mean = 8.0 * m_payloadSize / m_desiredRate.GetBitRate ();
m_randExp = ExponentialVariable (mean, 10000 * mean); // set upper limit to inter-arrival time
}
void
CcnxConsumer::SetPayloadSize (uint32_t payload)
{
m_payloadSize = payload;
UpdateMean ();
}
uint32_t
CcnxConsumer::GetPayloadSize () const
{
return m_payloadSize;
}
void
CcnxConsumer::SetDesiredRate (DataRate rate)
{
m_desiredRate = rate;
UpdateMean ();
}
DataRate
CcnxConsumer::GetDesiredRate () const
{
return m_desiredRate;
}
double
CcnxConsumer::GetMaxSize () const
{
if (m_seqMax == 0)
return -1.0;
return m_seqMax * m_payloadSize / 1024.0 / 1024.0;
}
void
CcnxConsumer::SetMaxSize (double size)
{
if (size < 0)
{
m_seqMax = 0;
return;
}
m_seqMax = floor(1.0 + size * 1024.0 * 1024.0 / m_payloadSize);
NS_LOG_DEBUG ("MaxSeqNo: " << m_seqMax);
}
void
CcnxConsumer::ScheduleNextPacket ()
{
if (!m_sendEvent.IsRunning ())
m_sendEvent = Simulator::Schedule (
Seconds(m_randExp.GetValue ()),
&CcnxConsumer::SendPacket, this);
}
// Application Methods
void
CcnxConsumer::StartApplication () // Called at time specified by Start
{
NS_LOG_FUNCTION_NOARGS ();
// do base stuff
CcnxApp::StartApplication ();
ScheduleNextPacket ();
}
void
CcnxConsumer::StopApplication () // Called at time specified by Stop
{
NS_LOG_FUNCTION_NOARGS ();
// cancel periodic packet generation
Simulator::Cancel (m_sendEvent);
// cleanup base stuff
CcnxApp::StopApplication ();
}
void
CcnxConsumer::SendPacket ()
{
if (!m_active) return;
NS_LOG_FUNCTION_NOARGS ();
boost::mutex::scoped_lock (m_seqTimeoutsGuard);
uint32_t seq;
if (m_retxSeqs.size () != 0)
{
seq = *m_retxSeqs.begin ();
NS_LOG_INFO ("Before: " << m_retxSeqs.size ());
m_retxSeqs.erase (m_retxSeqs.begin ());
NS_LOG_INFO ("After: " << m_retxSeqs.size ());
}
else
{
if (m_seqMax > 0)
{
if (m_seq >= m_seqMax)
{
return; // we are totally done
}
}
seq = m_seq++;
}
//
Ptr<CcnxNameComponents> nameWithSequence = Create<CcnxNameComponents> (m_interestName);
(*nameWithSequence) (seq);
//
CcnxInterestHeader interestHeader;
interestHeader.SetNonce (m_rand.GetValue ());
interestHeader.SetName (nameWithSequence);
interestHeader.SetInterestLifetime (m_interestLifeTime);
interestHeader.SetChildSelector (m_childSelector);
if (m_exclude.size ()>0)
{
interestHeader.SetExclude (Create<CcnxNameComponents> (m_exclude));
}
interestHeader.SetMaxSuffixComponents (m_maxSuffixComponents);
interestHeader.SetMinSuffixComponents (m_minSuffixComponents);
// NS_LOG_INFO ("Requesting Interest: \n" << interestHeader);
NS_LOG_DEBUG ("node("<< GetNode()->GetId() <<") sending Interest for sequence " << seq);
Ptr<Packet> packet = Create<Packet> ();
packet->AddHeader (interestHeader);
m_protocolHandler (packet);
NS_LOG_DEBUG ("Trying to add " << seq << " with " << Simulator::Now () << ". already " << m_seqTimeouts.size () << " items");
std::pair<SeqTimeoutsContainer::iterator, bool>
res = m_seqTimeouts.insert (SeqTimeout (seq, Simulator::Now ()));
if (!res.second)
m_seqTimeouts.modify (res.first,
ll::bind(&SeqTimeout::time, ll::_1) = Simulator::Now ());
m_transmittedInterests (&interestHeader, this, m_face);
ScheduleNextPacket ();
}
///////////////////////////////////////////////////
// Process incoming packets //
///////////////////////////////////////////////////
void
CcnxConsumer::OnContentObject (const Ptr<const CcnxContentObjectHeader> &contentObject,
const Ptr<const Packet> &payload)
{
if (!m_active) return;
CcnxApp::OnContentObject (contentObject, payload); // tracing inside
NS_LOG_FUNCTION (this << contentObject << payload);
// NS_LOG_INFO ("Received content object: " << boost::cref(*contentObject));
uint32_t seq = boost::lexical_cast<uint32_t> (contentObject->GetName ().GetComponents ().back ());
NS_LOG_INFO ("node("<< GetNode()->GetId() <<") get DATA for sequence " << seq);
boost::mutex::scoped_lock (m_seqTimeoutsGuard);
// SeqTimeoutsContainer::iterator entry = m_seqTimeouts.find (seq);
// NS_ASSERT_MSG (entry != m_seqTimeouts.end (),
// "Comment out this assert, if it causes problems");
// if (entry != m_seqTimeouts.end ())
// m_seqTimeouts.erase (entry);
m_seqTimeouts.erase (seq);
m_retxSeqs.erase (seq);
}
void
CcnxConsumer::OnNack (const Ptr<const CcnxInterestHeader> &interest)
{
if (!m_active) return;
CcnxApp::OnNack (interest); // tracing inside
NS_LOG_DEBUG ("Nack type: " << interest->GetNack ());
boost::mutex::scoped_lock (m_seqTimeoutsGuard);
NS_LOG_FUNCTION (this << interest);
// NS_LOG_INFO ("Received NACK: " << boost::cref(*interest));
uint32_t seq = boost::lexical_cast<uint32_t> (interest->GetName ().GetComponents ().back ());
NS_LOG_DEBUG ("node("<< GetNode()->GetId() <<") < NACK for " << seq);
// put in the queue of interests to be retransmitted
NS_LOG_INFO ("Before: " << m_retxSeqs.size ());
m_retxSeqs.insert (seq);
NS_LOG_INFO ("After: " << m_retxSeqs.size ());
ScheduleNextPacket ();
}
} // namespace ns3