blob: 45578909cf3292536efaf5109ed1e99cf556b47b [file] [log] [blame]
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
* Copyright (c) 2011-2015 Regents of the University of California.
*
* This file is part of ndnSIM. See AUTHORS for complete list of ndnSIM authors and
* contributors.
*
* ndnSIM is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Foundation,
* either version 3 of the License, or (at your option) any later version.
*
* ndnSIM 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
* ndnSIM, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
**/
// ndn-simple-with-content-freshness.cpp
#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/ndnSIM-module.h"
namespace ns3 {
/**
* This scenario simulates a very simple network topology:
*
*
* +----------+ 1Mbps +--------+ 1Mbps +----------+
* | consumer | <------------> | router | <------------> | producer |
* +----------+ 10ms +--------+ 10ms +----------+
*
* This scenario demonstrates how to use content store that responds to Freshness parameter set in
* data packets. In other words, if the producer set FreshnessPeriod field to 2 seconds, the
* corresponding data packet will not be considered fresh for more than 2 seconds (can be cached
* for a shorter time, if entry is evicted earlier)
*
* NS_LOG=DumbRequester ./waf --run ndn-simple-with-content-freshness
*/
int
main(int argc, char* argv[])
{
// setting default parameters for PointToPoint links and channels
Config::SetDefault("ns3::PointToPointNetDevice::DataRate", StringValue("1Mbps"));
Config::SetDefault("ns3::PointToPointChannel::Delay", StringValue("10ms"));
Config::SetDefault("ns3::DropTailQueue::MaxPackets", StringValue("20"));
// Read optional command-line parameters (e.g., enable visualizer with ./waf --run=<> --visualize
CommandLine cmd;
cmd.Parse(argc, argv);
// Creating nodes
NodeContainer nodes;
nodes.Create(3);
// Connecting nodes using two links
PointToPointHelper p2p;
p2p.Install(nodes.Get(0), nodes.Get(1));
p2p.Install(nodes.Get(1), nodes.Get(2));
// Install Ndn stack on all nodes
ndn::StackHelper ndnHelper;
ndnHelper.SetDefaultRoutes(true);
ndnHelper.SetOldContentStore("ns3::ndn::cs::Freshness::Lru", "MaxSize",
"2"); // allow just 2 entries to be cached
ndnHelper.InstallAll();
// Installing applications
// Consumer
ndn::AppHelper consumerHelper("OneInterestRequester");
// /*
// 1) at time 1 second requests Data from a producer that does not specify freshness
// 2) at time 10 seconds requests the same Data packet as client 1
// 3) at time 2 seconds requests Data from a producer that specifies freshness set to 2 seconds
// 4) at time 12 seconds requests the same Data packet as client 3
// Expectation:
// Interests from 1, 3 and 4 will reach producers
// Interset from 2 will be served from cache
// */
consumerHelper.SetPrefix("/no-freshness");
consumerHelper.Install(nodes.Get(0)).Start(Seconds(1));
consumerHelper.Install(nodes.Get(0)).Start(Seconds(10));
consumerHelper.SetPrefix("/with-freshness");
consumerHelper.Install(nodes.Get(0)).Start(Seconds(2));
consumerHelper.Install(nodes.Get(0)).Start(Seconds(12));
// Producer
ndn::AppHelper producerHelper("ns3::ndn::Producer");
producerHelper.SetAttribute("PayloadSize", StringValue("1024"));
producerHelper.SetAttribute("Freshness", TimeValue(Seconds(-1.0))); // unlimited freshness
producerHelper.SetPrefix("/no-freshness");
producerHelper.Install(nodes.Get(2)); // last node
producerHelper.SetAttribute("Freshness", TimeValue(Seconds(2.0))); // freshness 2 seconds (!!!
// freshness granularity is 1
// seconds !!!)
producerHelper.SetPrefix("/with-freshness");
producerHelper.Install(nodes.Get(2)); // last node
Simulator::Stop(Seconds(30.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
} // namespace ns3
int
main(int argc, char* argv[])
{
return ns3::main(argc, argv);
}