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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2011-2012 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>
*/
// custom-app.cc
#include "custom-app.h"
#include "ns3/ptr.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
#include "ns3/packet.h"
#include "ns3/ndn-app-face.hpp"
#include "ns3/ndn-fib.hpp"
#include "ns3/random-variable.h"
NS_LOG_COMPONENT_DEFINE("CustomApp");
namespace ns3 {
NS_OBJECT_ENSURE_REGISTERED(CustomApp);
// register NS-3 type
TypeId
CustomApp::GetTypeId()
{
static TypeId tid = TypeId("CustomApp").SetParent<ndn::App>().AddConstructor<CustomApp>();
return tid;
}
// Processing upon start of the application
void
CustomApp::StartApplication()
{
// initialize ndn::App
ndn::App::StartApplication();
// Create a name components object for name ``/prefix/sub``
Ptr<ndn::Name> prefix = Create<ndn::Name>(); // now prefix contains ``/``
prefix->append("prefix"); // now prefix contains ``/prefix``
prefix->append("sub"); // now prefix contains ``/prefix/sub``
/////////////////////////////////////////////////////////////////////////////
// Creating FIB entry that ensures that we will receive incoming Interests //
/////////////////////////////////////////////////////////////////////////////
// Get FIB object
Ptr<ndn::Fib> fib = GetNode()->GetObject<ndn::Fib>();
// Add entry to FIB
// Note that ``m_face`` is cretaed by ndn::App
Ptr<ndn::fib::Entry> fibEntry = fib->Add(*prefix, m_face, 0);
Simulator::Schedule(Seconds(1.0), &CustomApp::SendInterest, this);
}
// Processing when application is stopped
void
CustomApp::StopApplication()
{
// cleanup ndn::App
ndn::App::StopApplication();
}
void
CustomApp::SendInterest()
{
/////////////////////////////////////
// Sending one Interest packet out //
/////////////////////////////////////
Ptr<ndn::Name> prefix = Create<ndn::Name>("/prefix/sub"); // another way to create name
// Create and configure ndn::Interest
Ptr<ndn::Interest> interest = Create<ndn::Interest>();
UniformVariable rand(0, std::numeric_limits<uint32_t>::max());
interest->SetNonce(rand.GetValue());
interest->SetName(prefix);
interest->SetInterestLifetime(Seconds(1.0));
NS_LOG_DEBUG("Sending Interest packet for " << *prefix);
// Call trace (for logging purposes)
m_transmittedInterests(interest, this, m_face);
m_face->ReceiveInterest(interest);
}
// Callback that will be called when Interest arrives
void
CustomApp::OnInterest(Ptr<const ndn::Interest> interest)
{
ndn::App::OnInterest(interest);
NS_LOG_DEBUG("Received Interest packet for " << interest->GetName());
// Create and configure ndn::Data and ndn::DataTail
// (header is added in front of the packet, tail is added at the end of the packet)
// Note that Interests send out by the app will not be sent back to the app !
Ptr<ndn::Data> data = Create<ndn::Data>(Create<Packet>(1024));
data->SetName(
Create<ndn::Name>(interest->GetName())); // data will have the same name as Interests
NS_LOG_DEBUG("Sending Data packet for " << data->GetName());
// Call trace (for logging purposes)
m_transmittedDatas(data, this, m_face);
m_face->ReceiveData(data);
}
// Callback that will be called when Data arrives
void
CustomApp::OnData(Ptr<const ndn::Data> contentObject)
{
NS_LOG_DEBUG("Receiving Data packet for " << contentObject->GetName());
std::cout << "DATA received for name " << contentObject->GetName() << std::endl;
}
} // namespace ns3