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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.h"
#include "ns3/ndn-interest.h"
#include "ns3/ndn-content-object.h"
#include "ns3/ndn-fib.h"
#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::ContentObject and ndn::ContentObjectTail
// (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::ContentObject> data = Create<ndn::ContentObject> (Create<Packet> (1024));
data->SetName (Create<ndn::Name> (interest->GetName ())); // data will have the same name as Interests
NS_LOG_DEBUG ("Sending ContentObject packet for " << data->GetName ());
// Call trace (for logging purposes)
m_transmittedContentObjects (data, this, m_face);
m_face->ReceiveData (data);
}
// Callback that will be called when Data arrives
void
CustomApp::OnContentObject (Ptr<const ndn::ContentObject> contentObject)
{
NS_LOG_DEBUG ("Receiving ContentObject packet for " << contentObject->GetName ());
std::cout << "DATA received for name " << contentObject->GetName () << std::endl;
}
} // namespace ns3