How to Calculate Network Auditing in ns3

To calculate a network auditing in ns3, we need to monitor and analyse the network activities to make sure the compliance with policies to classify the malevolent or misbehaviour. This is usually that contains to track performance metrics like bandwidth usage, packet counts, session durations, and other network events. Here, we simulate and estimate the network auditing in ns3:

Steps to Simulate and Calculate Network Auditing in ns3:

1. Set Up the ns3 Environment:
   • Make sure ns3 is installed in the computer.
2. Define the Network Topology:
   • Create a network topology with nodes representing clients, servers, and possibly intermediary nodes like routers or switches.
3. Implement Auditing Mechanisms:
   • Use ns3 traces sources and callbacks to log several network events for auditing purposes.
4. Install Applications:
   • Download traffic-generating applications on the nodes to simulate network traffic.
5. Monitor and Log Events:
   • Use trace sources or callbacks to monitor and log events such as packet transmissions, receptions, drops, and other relevant metrics.
6. Analyze Auditing Data:
   • Gather and evaluate the logged data to achieve network auditing and create reports.

Example Code

Here is the sample on how to setup a basic ns3 simulation to estimate the network auditing. This is an instance logs packet transmissions, receptions, and drops, and generates a report at the end.

#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/flow-monitor-module.h”

#include “ns3/packet.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“NetworkAuditingExample”);

std::map<uint32_t, uint64_t> packetsSent;

std::map<uint32_t, uint64_t> packetsReceived;

std::map<uint32_t, uint64_t> packetsDropped;

void TxCallback (Ptr<const Packet> packet)

{

uint32_t nodeId = packet->GetUid();

packetsSent[nodeId]++;

}

void RxCallback (Ptr<const Packet> packet)

{

uint32_t nodeId = packet->GetUid();

packetsReceived[nodeId]++;

}

void DropCallback (Ptr<const Packet> packet)

{

uint32_t nodeId = packet->GetUid();

packetsDropped[nodeId]++;

}

void CalculateNetworkAuditing ()

{

NS_LOG_UNCOND (“Network Auditing Report:”);

for (auto it = packetsSent.begin (); it != packetsSent.end (); ++it)

{

uint32_t nodeId = it->first;

uint64_t sent = it->second;

uint64_t received = packetsReceived[nodeId];

uint64_t dropped = packetsDropped[nodeId];

NS_LOG_UNCOND (“Node ” << nodeId << “: Packets Sent = ” << sent << “, Packets Received = ” << received << “, Packets Dropped = ” << dropped);

}

}

int main (int argc, char *argv[])

{

CommandLine cmd;

cmd.Parse (argc, argv);

Time::SetResolution (Time::NS);

// Create nodes

NodeContainer nodes;

nodes.Create (4); // Two clients and two servers

// Create point-to-point links

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“10Mbps”));

pointToPoint.SetChannelAttribute (“Delay”, StringValue (“2ms”));

NetDeviceContainer devices01 = pointToPoint.Install (NodeContainer (nodes.Get (0), nodes.Get (1)));

NetDeviceContainer devices12 = pointToPoint.Install (NodeContainer (nodes.Get (1), nodes.Get (2)));

NetDeviceContainer devices23 = pointToPoint.Install (NodeContainer (nodes.Get (2), nodes.Get (3)));

// Install the internet stack on nodes

InternetStackHelper stack;

stack.Install (nodes);

// Assign IP addresses to the devices

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces01 = address.Assign (devices01);

address.SetBase (“10.1.2.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces12 = address.Assign (devices12);

address.SetBase (“10.1.3.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces23 = address.Assign (devices23);

// Enable routing

Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

// Create UDP server on node 2 and node 3

UdpServerHelper server (9);

ApplicationContainer serverApp1 = server.Install (nodes.Get (2));

ApplicationContainer serverApp2 = server.Install (nodes.Get (3));

serverApp1.Start (Seconds (1.0));

serverApp1.Stop (Seconds (10.0));

serverApp2.Start (Seconds (1.0));

serverApp2.Stop (Seconds (10.0));

// Create UDP client on node 0 and node 1

UdpClientHelper client1 (interfaces12.GetAddress (1), 9);

client1.SetAttribute (“MaxPackets”, UintegerValue (320));

client1.SetAttribute (“Interval”, TimeValue (MilliSeconds (10)));

client1.SetAttribute (“PacketSize”, UintegerValue (1024));

UdpClientHelper client2 (interfaces23.GetAddress (1), 9);

client2.SetAttribute (“MaxPackets”, UintegerValue (320));

client2.SetAttribute (“Interval”, TimeValue (MilliSeconds (10)));

client2.SetAttribute (“PacketSize”, UintegerValue (1024));

ApplicationContainer clientApp1 = client1.Install (nodes.Get (0));

ApplicationContainer clientApp2 = client2.Install (nodes.Get (1));

clientApp1.Start (Seconds (2.0));

clientApp1.Stop (Seconds (10.0));

clientApp2.Start (Seconds (2.0));

clientApp2.Stop (Seconds (10.0));

// Trace packet transmission, reception, and drops

Config::ConnectWithoutContext(“/NodeList/*/ApplicationList/*/$ns3::UdpClient/Tx”,MakeCallback (&TxCallback));

Config::ConnectWithoutContext(“/NodeList/*/ApplicationList/*/$ns3::UdpServer/Rx”,MakeCallback (&RxCallback));

Config::ConnectWithoutContext(“/NodeList/*/DeviceList/*/Drop”,MakeCallback(&DropCallback));

// Install flow monitor to capture performance metrics

FlowMonitorHelper flowHelper;

Ptr<FlowMonitor> flowMonitor = flowHelper.InstallAll ();

Simulator::Stop (Seconds (11.0));

Simulator::Run ();

CalculateNetworkAuditing ();

Simulator::Destroy ();

return 0;

}

Explanation

1. Setup: The code sets up a network topology with four nodes: two clients and two servers, connected by point-to-point links.
2. Internet Stack and Routing: The internet stack is installed on all nodes, and global routing is enabled.
3. Applications: UDP servers are installed on the server nodes (nodes 2 and 3), and UDP clients are installed on the client nodes (nodes 0 and 1) to generate traffic.
4. Auditing Mechanisms: The TxCallback, RxCallback, and DropCallback functions are connected to trace packet transmissions, receptions, and drops. These functions update counters for each node and log relevant information.
5. Network Auditing Calculation: The CalculateNetworkAuditing function generates a report that logs the number of packets sent, received, and dropped by each node.

Running the Simulation

Compile and run the simulation using the following commands in your ns3 environment:

./waf configure

./waf build

./waf –run your-script-name

Replace your-script-name with the actual name of your script file.

In this script, we had learned about how the Network auditing generates a report by using the ns3 simulation tool. We will give further details on how the network auditing is executed in other alternative tools. To Calculate Network Auditing in ns3tool and carry on comparative analysis you can share with us all your parameters to ns3simulation.com and get best results from our team.