To implement an eavesdropping attack in ns3, we need to simulate where an attacker passively pay attention to the network traffic among other nodes. To observe the attack node packets by setting up a network topology, creating victim traffic and configure it. Here, we can see how to implement an eavesdropping attack in ns3:
Step-by-Step Implementation
- Set Up ns3 Environment:
- Make sure ns3 is installed.
- Download all the essential libraries.
- Create a New ns3 Script:
- Create a new script file in the scratch directory of ns3, e.g., eavesdropping_attack.cc.
- Include Necessary Headers:
- In the script, conclude all the required ns3 headers.
- Define Network Topology:
- Set up a network topology that includes multiple nodes for legitimate communication and one attacker node for eavesdropping.
- Implement Eavesdropping Logic:
- Use packet capture functionality to capture and log packets at the attacker node.
- Enable Packet Capture:
- Enable pcap tracing to capture packets for analysis with Wireshark.
- Run the Simulation:
- Set the simulation time and run the simulation using Simulator::Run() and Simulator::Destroy().
Example
The given below is the sample to demonstrate how eavesdropping will work in ns3:
#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”
using namespace ns3;
NS_LOG_COMPONENT_DEFINE (“EavesdroppingAttack”);
void PacketCapture (Ptr<const Packet> packet, Ptr<Ipv4> ipv4, uint32_t interface)
{
NS_LOG_INFO (“Captured packet of size: ” << packet->GetSize ());
}
int main (int argc, char *argv[])
{
// Set up logging
LogComponentEnable (“EavesdroppingAttack”, LOG_LEVEL_INFO);
// Create nodes
NodeContainer nodes;
nodes.Create (4); // Three legitimate nodes and one eavesdropper node
// Create point-to-point links
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“5Mbps”));
pointToPoint.SetChannelAttribute (“Delay”, StringValue (“2ms”));
NetDeviceContainer devices;
for (uint32_t i = 0; i < nodes.GetN () – 1; ++i)
{
devices.Add (pointToPoint.Install (nodes.Get (i), nodes.Get (i + 1)));
}
// Install the internet stack
InternetStackHelper stack;
stack.Install (nodes);
// Assign IP addresses
Ipv4AddressHelper address;
address.SetBase (“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign (devices);
// Install applications on legitimate nodes
uint16_t port = 9; // Discard port (RFC 863)
// Server application
UdpEchoServerHelper echoServer (port);
ApplicationContainer serverApps = echoServer.Install (nodes.Get (1));
serverApps.Start (Seconds (1.0));
serverApps.Stop (Seconds (10.0));
// Client application
UdpEchoClientHelper echoClient (interfaces.GetAddress (1), port);
echoClient.SetAttribute (“MaxPackets”, UintegerValue (100));
echoClient.SetAttribute (“Interval”, TimeValue (Seconds (0.1)));
echoClient.SetAttribute (“PacketSize”, UintegerValue (1024));
ApplicationContainer clientApps = echoClient.Install (nodes.Get (0));
clientApps.Start (Seconds (2.0));
clientApps.Stop (Seconds (10.0));
// Enable packet capture on all nodes for analysis
pointToPoint.EnablePcapAll (“eavesdropping_attack”);
// Set up packet capture on the eavesdropper node
Ptr<NetDevice> eavesdropperDevice = devices.Get (devices.GetN () – 1);
Ptr<Ipv4> ipv4 = nodes.Get (nodes.GetN () – 1)->GetObject<Ipv4> ();
ipv4->TraceConnectWithoutContext (“Rx”, MakeCallback (&PacketCapture));
// Run simulation
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
Explanation:
The given below are the detailed explanation for the eavesdropping process that are
- Nodes and Links:
- Created 4 nodes: three legitimate nodes and one eavesdropper node.
- Configured point-to-point links between the nodes.
- Applications:
- Installed a UDP echo server on one of the legitimate nodes.
- Installed a UDP echo client on another legitimate node to generate traffic.
- Packet Capture Logic:
- Implemented a PacketCapture function to log packet information.
- Connected the packet capture function to the Rx trace source of the eavesdropper’s network device to capture packets.
- Packet Capture:
- Enabled pcap tracing on all nodes to capture the traffic for analysis with Wireshark.
- Running the Simulation:
- The simulation runs, with the eavesdropper node passively capturing packets, and the traffic is captured in pcap files.
Overall, we can see how the eavesdropping attack will simulate in ns3 simulation tool. We also deliver the more associated information about how eavesdropping will adjust in other simulations.
Network Topology on all areas of eavesdropping attack programming results are done by our programmers.