nix-simple-multi-address.cc

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/*
 * 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/applications-module.h"
#include "ns3/core-module.h"
#include "ns3/internet-module.h"
#include "ns3/ipv4-list-routing-helper.h"
#include "ns3/ipv4-static-routing-helper.h"
#include "ns3/network-module.h"
#include "ns3/nix-vector-helper.h"
#include "ns3/point-to-point-module.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.
    Ipv4NixVectorHelper::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.
    Ipv4NixVectorHelper::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;
}