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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 "ccnx-consumer-window.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/uinteger.h"
#include "ns3/double.h"
NS_LOG_COMPONENT_DEFINE ("CcnxConsumerWindow");
namespace ns3
{
NS_OBJECT_ENSURE_REGISTERED (CcnxConsumerWindow);
TypeId
CcnxConsumerWindow::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::CcnxConsumerWindow")
.SetParent<CcnxConsumer> ()
.AddConstructor<CcnxConsumerWindow> ()
.AddAttribute ("Window", "Initial size of the window",
StringValue ("1"),
MakeUintegerAccessor (&CcnxConsumerWindow::GetWindow, &CcnxConsumerWindow::SetWindow),
MakeUintegerChecker<uint32_t> ())
.AddTraceSource ("WindowTrace",
"Window that controls how many outstanding interests are allowed",
MakeTraceSourceAccessor (&CcnxConsumerWindow::m_window))
.AddTraceSource ("InFlight",
"Current number of outstanding interests",
MakeTraceSourceAccessor (&CcnxConsumerWindow::m_window))
;
return tid;
}
CcnxConsumerWindow::CcnxConsumerWindow ()
: m_inFlight (0)
{
}
void
CcnxConsumerWindow::SetWindow (uint32_t window)
{
m_window = window;
}
uint32_t
CcnxConsumerWindow::GetWindow () const
{
return m_window;
}
void
CcnxConsumerWindow::ScheduleNextPacket ()
{
if (m_window == static_cast<uint32_t> (0) || m_inFlight >= m_window)
{
if (!m_sendEvent.IsRunning ())
m_sendEvent = Simulator::Schedule (Seconds (m_rtt->RetransmitTimeout ().ToDouble (Time::S) * 0.1), &CcnxConsumer::SendPacket, this);
return;
}
// std::cout << "Window: " << m_window << ", InFlight: " << m_inFlight << "\n";
if (!m_sendEvent.IsRunning ())
{
m_inFlight++;
m_sendEvent = Simulator::ScheduleNow (&CcnxConsumer::SendPacket, this);
}
}
///////////////////////////////////////////////////
// Process incoming packets //
///////////////////////////////////////////////////
void
CcnxConsumerWindow::OnContentObject (const Ptr<const CcnxContentObjectHeader> &contentObject,
const Ptr<const Packet> &payload)
{
CcnxConsumer::OnContentObject (contentObject, payload);
m_window = m_window + 1;
if (m_inFlight > static_cast<uint32_t> (0)) m_inFlight--;
ScheduleNextPacket ();
}
void
CcnxConsumerWindow::OnNack (const Ptr<const CcnxInterestHeader> &interest)
{
CcnxConsumer::OnNack (interest);
if (m_inFlight > static_cast<uint32_t> (0)) m_inFlight--;
if (m_window > static_cast<uint32_t> (0))
{
// m_window = 0.5 * m_window;//m_window - 1;
m_window = m_window - 1;
}
}
void
CcnxConsumerWindow::OnTimeout (uint32_t sequenceNumber)
{
if (m_inFlight > static_cast<uint32_t> (0)) m_inFlight--;
CcnxConsumer::OnTimeout (sequenceNumber);
}
} // namespace ns3