Steps to Implement Cyber Law in ns3

To implement the cyber law in ns3 consists to simulate the environment where the cyber laws or policies can be required in a network. This usually contains monitoring network traffic, classifying the violations of policies and taking the applicable actions. While ns-3 doesn’t have built-in support for cyber law enforcement that can make the custom applications that simulate the execution of such policies.

Here are the procedures how to setup a network in ns-3 that implements a simple cyber law like blocking uncertain types of traffic.

Step-by-Step Implementation

Install ns3

To make sure ns-3 is installed on your system. You can download and install it from the official website.

Define the Network Topology

Describe the network topology that contains:

Normal nodes (legitimate users)
Server nodes
Policy enforcement nodes (nodes used to enforce cyber laws)

Create Network Nodes

Create network nodes using NodeContainer.

NodeContainer normalNodes, serverNodes, policyNodes;

normalNodes.Create(3);

serverNodes.Create(1);

policyNodes.Create(1);

Set Up Network Devices

By using the applicable network interfaces download the network devices on nodes like WiFi for wireless communication.

WifiHelper wifi;

wifi.SetStandard(WIFI_PHY_STANDARD_80211n_5GHZ);

WifiMacHelper mac;

mac.SetType(“ns3::AdhocWifiMac”);

YansWifiPhyHelper phy = YansWifiPhyHelper::Default();

YansWifiChannelHelper channel = YansWifiChannelHelper::Default();

phy.SetChannel(channel.Create());

NetDeviceContainer normalDevices = wifi.Install(phy, mac, normalNodes);

NetDeviceContainer serverDevices = wifi.Install(phy, mac, serverNodes);

NetDeviceContainer policyDevices = wifi.Install(phy, mac, policyNodes);

Configure Mobility Model

Configure the nodes for mobility model.

MobilityHelper mobility;

mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);

mobility.Install(normalNodes);

mobility.Install(serverNodes);

mobility.Install(policyNodes);

Set Up Packet Capture

Configure packet capture on the policy enforcement nodes. Use PcapHelper to capture packets.

PcapHelper pcapHelper;

Ptr<PcapFileWrapper> file = pcapHelper.CreateFile(“policy_capture.pcap”, std::ios::out, PcapHelper::DLT_PPP);

for (uint32_t i = 0; i < policyDevices.GetN(); ++i) {

phy.EnablePcap(“policy_capture”, policyDevices.Get(i), true, true);

}

Implement Policy Enforcement Application

Create an application that enforces cyber laws. Below is a simple example of an application that blocks packets based on a policy (e.g., blocks UDP traffic).

Policy Enforcement Application (Example)

class PolicyEnforcementApplication : public Application {

public:

void StartApplication() override {

recvSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());

recvSocket->Bind(InetSocketAddress(Ipv4Address::GetAny(), listenPort));

recvSocket->SetRecvCallback(MakeCallback(&PolicyEnforcementApplication::HandleRead, this));

}

void SetListenPort(uint16_t port) {

listenPort = port;

}

void HandleRead(Ptr<Socket> socket) {

Ptr<Packet> packet;

Address from;

while ((packet = socket->RecvFrom(from))) {

Ipv4Address senderAddr = InetSocketAddress::ConvertFrom(from).GetIpv4();

std::cout << “Packet received from ” << senderAddr << std::endl;

// Simulate policy enforcement: block UDP packets

if (InetSocketAddress::ConvertFrom(from).GetPort() == 9) {

std::cout << “Blocking packet from ” << senderAddr << ” due to policy violation.” << std::endl;

} else {

// Forward packet if it does not violate the policy

std::cout << “Forwarding packet from ” << senderAddr << std::endl;

ForwardPacket(packet, from);

}

void ForwardPacket(Ptr<Packet> packet, Address from) {

// Simulate forwarding the packet to the intended destination

// This can be implemented as per the specific forwarding logic

}

private:

Ptr<Socket> recvSocket;

uint16_t listenPort;

};

Set Up Applications

Install the applications on the nodes.

ApplicationContainer normalApps, serverApps, policyApps;

// Normal node applications (e.g., sending normal traffic)

for (uint32_t i = 0; i < normalNodes.GetN(); ++i) {

OnOffHelper onoff(“ns3::UdpSocketFactory”, InetSocketAddress(serverNodes.Get(0)->GetObject<Ipv4>()->GetAddress(1, 0).GetLocal(), 9));

onoff.SetConstantRate(DataRate(“500kb/s”));

ApplicationContainer app = onoff.Install(normalNodes.Get(i));

app.Start(Seconds(1.0));

app.Stop(Seconds(20.0));

normalApps.Add(app);

}

// Server node application (e.g., packet sink)

PacketSinkHelper sink(“ns3::UdpSocketFactory”, InetSocketAddress(Ipv4Address::GetAny(), 9));

serverApps.Add(sink.Install(serverNodes.Get(0)));

// Policy enforcement node application

Ptr<PolicyEnforcementApplication>policyApp=CreateObject<PolicyEnforcementApplication>);

policyApp->SetListenPort(9);

policyNodes.Get(0)->AddApplication(policyApp);

policyApp->SetStartTime(Seconds(1.0));

policyApp->SetStopTime(Seconds(20.0));

policyApps.Add(policyApp);

serverApps.Start(Seconds(1.0));

serverApps.Stop(Seconds(20.0));

Set Up Routing Protocols

Configure routing protocols for the network.

AodvHelper aodv;

InternetStackHelper internet;

internet.SetRoutingHelper(aodv);

internet.Install(normalNodes);

internet.Install(serverNodes);

internet.Install(policyNodes);

Assign IP Addresses

Allocate IP addresses to the network devices.

Ipv4AddressHelper address;

address.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer normalInterfaces = address.Assign(normalDevices);

Ipv4InterfaceContainer serverInterfaces = address.Assign(serverDevices);

Ipv4InterfaceContainer policyInterfaces = address.Assign(policyDevices);

Run the Simulation

Configure the simulation runtime and execute it.

Simulator::Stop(Seconds(20.0));

Simulator::Run();

Simulator::Destroy();

Example of a Simple Cyber Law Enforcement Script

The given are the sample to complete the script for cyber law enforcement that are;

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/wifi-module.h”

#include “ns3/mobility-module.h”

#include “ns3/applications-module.h”

#include “ns3/aodv-module.h”

using namespace ns3;