To implement the security preservation in ns3 has needs to simulate the mechanism that make sure that the data integrity, confidentiality, and availability inside a network simulation. Here, we provide the structured procedure on how to implement the security preservation in ns3:
Step-by-Step Implementation:
Step 1: Set Up the ns3 Environment
- Install ns3: To make certain ns3 is installed in the computer.
sudo apt-get update
sudo apt-get install ns3
Create a New ns3 Project: Create a directory for your new project within the ns3 workspace.
cd ns-3
mkdir scratch/security-preservation
Step 2: Integrate Security Mechanisms
In Security mechanisms can be incorporated at numerous layers of the network stack. For this instance, we will implement a simple encryption and decryption mechanism at the application layer using symmetric key cryptography.
- Define Encryption and Decryption Functions: Create functions to handle encryption and decryption. For simplicity, we will use a basic XOR cipher.
// CryptoUtils.h
#ifndef CRYPTO_UTILS_H
#define CRYPTO_UTILS_H
#include <string>
#include <vector>
class CryptoUtils {
public:
static std::vector<uint8_t> Encrypt(const std::vector<uint8_t>& data, uint8_t key);
static std::vector<uint8_t> Decrypt(const std::vector<uint8_t>& data, uint8_t key);
};
#endif // CRYPTO_UTILS_H
// CryptoUtils.cc
#include “CryptoUtils.h”
std::vector<uint8_t> CryptoUtils::Encrypt(const std::vector<uint8_t>& data, uint8_t key) {
std::vector<uint8_t> encryptedData = data;
for (auto& byte : encryptedData) {
byte ^= key;
}
return encryptedData;
}
std::vector<uint8_t> CryptoUtils::Decrypt(const std::vector<uint8_t>& data, uint8_t key) {
// Since XOR is symmetric, encryption and decryption are identical
return Encrypt(data, key);
}
Step 3: Implement Secure Communication in ns3
- Create a New Simulation Script: Create a new script in your scratch directory to implement secure communication.
// security-preservation.cc
#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 “CryptoUtils.h”
using namespace ns3;
NS_LOG_COMPONENT_DEFINE(“SecurityPreservation”);
class SecureApplication : public Application {
public:
SecureApplication();
virtual ~SecureApplication();
void Setup(Ptr<Socket> socket, Address address, uint8_t key, uint32_t packetSize, uint32_t nPackets, DataRate dataRate);
private:
virtual void StartApplication(void);
virtual void StopApplication(void);
void ScheduleTx(void);
void SendPacket(void);
Ptr<Socket> m_socket;
Address m_peer;
uint8_t m_key;
uint32_t m_packetSize;
uint32_t m_nPackets;
DataRate m_dataRate;
EventId m_sendEvent;
bool m_running;
uint32_t m_packetsSent;
};
SecureApplication::SecureApplication()
: m_socket(0),
m_peer(),
m_key(0),
m_packetSize(0),
m_nPackets(0),
m_dataRate(0),
m_sendEvent(),
m_running(false),
m_packetsSent(0) {}
SecureApplication::~SecureApplication() {
m_socket = 0;
}
void SecureApplication::Setup(Ptr<Socket> socket, Address address, uint8_t key, uint32_t packetSize, uint32_t nPackets, DataRate dataRate) {
m_socket = socket;
m_peer = address;
m_key = key;
m_packetSize = packetSize;
m_nPackets = nPackets;
m_dataRate = dataRate;
}
void SecureApplication::StartApplication(void) {
m_running = true;
m_packetsSent = 0;
m_socket->Bind();
m_socket->Connect(m_peer);
SendPacket();
}
void SecureApplication::StopApplication(void) {
m_running = false;
if (m_sendEvent.IsRunning()) {
Simulator::Cancel(m_sendEvent);
}
if (m_socket) {
m_socket->Close();
}
}
void SecureApplication::SendPacket(void) {
std::vector<uint8_t> data(m_packetSize, ‘A’); // Create a dummy payload
std::vector<uint8_t> encryptedData = CryptoUtils::Encrypt(data, m_key);
Ptr<Packet> packet = Create<Packet>(encryptedData.data(), encryptedData.size());
m_socket->Send(packet);
if (++m_packetsSent < m_nPackets) {
ScheduleTx();
}
}
void SecureApplication::ScheduleTx(void) {
if (m_running) {
Time tNext(Seconds(m_packetSize * 8 / static_cast<double>(m_dataRate.GetBitRate())));
m_sendEvent = Simulator::Schedule(tNext, &SecureApplication::SendPacket, this);
}
}
void ReceivePacket(Ptr<Socket> socket) {
Ptr<Packet> packet;
Address from;
while ((packet = socket->RecvFrom(from))) {
std::vector<uint8_t> encryptedData(packet->GetSize());
packet->CopyData(encryptedData.data(), encryptedData.size());
std::vector<uint8_t> decryptedData = CryptoUtils::Decrypt(encryptedData, 0xAA); // Use the same key for decryption
NS_LOG_UNCOND(“Received decrypted packet: ” << std::string(decryptedData.begin(), decryptedData.end()));
}
}
int main(int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse(argc, argv);
NodeContainer nodes;
nodes.Create(2);
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes);
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
uint16_t port = 9;
Ptr<Socket> recvSink = Socket::CreateSocket(nodes.Get(1), TypeId::LookupByName(“ns3::UdpSocketFactory”));
InetSocketAddress local = InetSocketAddress(Ipv4Address::GetAny(), port);
recvSink->Bind(local);
recvSink->SetRecvCallback(MakeCallback(&ReceivePacket));
Ptr<Socket> source = Socket::CreateSocket(nodes.Get(0), TypeId::LookupByName(“ns3::UdpSocketFactory”));
InetSocketAddress remote = InetSocketAddress(interfaces.GetAddress(1), port);
source->Connect(remote);
Ptr<SecureApplication> app = CreateObject<SecureApplication>();
app->Setup(source, remote, 0xAA, 1024, 1000, DataRate(“1Mbps”));
nodes.Get(0)->AddApplication(app);
app->SetStartTime(Seconds(1.0));
app->SetStopTime(Seconds(10.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
Step 4: Compile and Run the Simulation
- Compile the Script: Compile your script using the waf build system.
./waf build
Run the Simulation: Run your simulation script and observe the results.
./waf –run scratch/security-preservation
Step 5: Enable Tracing and Analyse Results
- Enable Tracing: Add tracing to collect data for analysis.
AsciiTraceHelper ascii;
pointToPoint.EnableAsciiAll(ascii.CreateFileStream(“security-preservation.tr”));
Run the Simulation: Set the simulation stop time and run it.
Simulator::Stop(Seconds(10.0));
Simulator::Run();
Simulator::Destroy();
Step 6: Analyse the Results
After running the simulation, analyse the generated trace files (security-preservation.tr) to study the encrypted and decrypted communication
In the conclusion, security preservation had successfully implemented by using ns3 tool and also helps further data about how the security preservation will adjust in diverse scenarios.
Project ideas focusing on Security Preservation within the ns3 tool are shared by our developers. Our team specializes in ensuring data integrity, confidentiality, and availability in network simulations. Reach out to ns3simulation.com for further guidance.