nix-simple-multi-address.cc

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2021 NITK Surathkal
 *
 * 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: Ameya Deshpande <ameyanrd@outlook.com>
 *
 */
 
#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/applications-module.h"
#include "ns3/ipv4-static-routing-helper.h"
#include "ns3/ipv4-list-routing-helper.h"
#include "ns3/nix-vector-helper.h"
 
using namespace ns3;
 
NS_LOG_COMPONENT_DEFINE ("NixSimpleMultiAddressExample");
 
int
main (int argc, char *argv[])
{
  CommandLine cmd (__FILE__);
  cmd.Parse (argc, argv);
 
  LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_INFO);
  LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_INFO);
 
  NodeContainer nodes12;
  nodes12.Create (2);
 
  NodeContainer nodes23;
  nodes23.Add (nodes12.Get (1));
  nodes23.Create (1);
 
  NodeContainer nodes34;
  nodes34.Add (nodes23.Get (1));
  nodes34.Create (1);
 
  PointToPointHelper pointToPoint;
  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));
 
  NodeContainer allNodes = NodeContainer (nodes12, nodes23.Get (1), nodes34.Get (1));
 
  // NixHelper to install nix-vector routing
  // on all nodes
  Ipv4NixVectorHelper nixRouting;
  InternetStackHelper stack;
  stack.SetRoutingHelper (nixRouting); // has effect on the next Install ()
  stack.Install (allNodes);
 
  NetDeviceContainer devices12;
  NetDeviceContainer devices23;
  NetDeviceContainer devices34;
  devices12 = pointToPoint.Install (nodes12);
  devices23 = pointToPoint.Install (nodes23);
  devices34 = pointToPoint.Install (nodes34);
 
  Ipv4AddressHelper address1;
  address1.SetBase ("10.1.1.0", "255.255.255.0");
  Ipv4AddressHelper address2;
  address2.SetBase ("10.1.2.0", "255.255.255.0");
  Ipv4AddressHelper address3;
  address3.SetBase ("10.1.3.0", "255.255.255.0");
  Ipv4AddressHelper address4;
  address4.SetBase ("10.2.1.0", "255.255.255.0");
  Ipv4AddressHelper address5;
  address5.SetBase ("10.2.3.0", "255.255.255.0");
 
  address1.Assign (devices12);
  address2.Assign (devices23);
  Ipv4InterfaceContainer interfaces34 = address3.Assign (devices34);
  Ipv4InterfaceContainer interfaces12 = address4.Assign (devices12);
 
  UdpEchoServerHelper echoServer (9);
 
  ApplicationContainer serverApps = echoServer.Install (nodes34.Get (1));
  serverApps.Start (Seconds (1.0));
  serverApps.Stop (Seconds (10.0));
 
  // Set the destination address as 10.1.3.2
  UdpEchoClientHelper echoClient (interfaces34.GetAddress (1), 9);
  echoClient.SetAttribute ("MaxPackets", UintegerValue (1));
  echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.)));
  echoClient.SetAttribute ("PacketSize", UintegerValue (1024));
 
  ApplicationContainer clientApps = echoClient.Install (nodes12.Get (0));
  clientApps.Start (Seconds (2.0));
  clientApps.Stop (Seconds (10.0));
 
  // Trace routing paths for different source and destinations.
  Ptr<OutputStreamWrapper> routingStream = Create<OutputStreamWrapper> ("nix-simple-multi-address.routes", std::ios::out);
  // Check the path from n0 to n1 (10.1.3.2).
  nixRouting.PrintRoutingPathAt (Seconds (3), nodes12.Get (0), interfaces12.GetAddress (1, 1), routingStream);
  // Trace routing tables.
  nixRouting.PrintRoutingTableAllAt (Seconds (4), routingStream);
  // Assign address5 addresses to n2 and n3.
  // n2 gets 10.2.3.1 and n3 gets 10.2.3.2 on the same interface.
  Simulator::Schedule(Seconds (5), &Ipv4AddressHelper::Assign, &address5, devices34);
 
  // Trace routing tables.
  // Notice that NixCache and Ipv4RouteCache becomes empty for each node.
  // This happens because new addresses are added at t = +5s, due to which
  // existing caches get flushed.
  nixRouting.PrintRoutingTableAllAt (Seconds (6), routingStream);
 
  // Check the path from n0 to n3 (10.2.3.2).
  nixRouting.PrintRoutingPathAt (Seconds (7), nodes12.Get (0), Ipv4Address ("10.2.3.2"), routingStream);
 
  Simulator::Run ();
  Simulator::Destroy ();
  return 0;
}