To implement the network internet governance in the ns3 requires simulating policies and rules that standardize how the data is accomplished, routed and retrieved over the network. This kind of network has some features such as access control, quality of service (QoS), traffic shaping and policy-based routing.
Below, we provided the step-by-step process on how to implement internet governance:
Step-by-Step Implementation:
Step 1: Setup ns3 Environment
Make sure that the ns3 is installed on your system.
Step 2: Include Necessary Modules
We have to take in some necessary ns3 modules in your script:
#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/traffic-control-module.h”
#include “ns3/flow-monitor-module.h”
Step 3: Create the Simulation Script
- Setup Nodes and Network:
using namespace ns3;
NS_LOG_COMPONENT_DEFINE (“NetworkInternetGovernanceExample”);
void EnforcePolicies (Ptr<Packet> packet, Ptr<NetDevice> device, Ptr<QueueDiscItem> item)
{
// Implement policy enforcement logic here
// For example, drop packets based on specific criteria
NS_LOG_UNCOND (“Enforcing policies on packet: ” << packet->GetUid ());
// Drop the packet if it meets certain criteria (e.g., based on source IP, destination IP, etc.)
if (/* your condition here */)
{
item->Drop (PacketDropReason::POLICY);
}
}
int main (int argc, char *argv[])
{
CommandLine cmd;
cmd.Parse (argc, argv);
// Create nodes
NodeContainer nodes;
nodes.Create (4);
// Create point-to-point links
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“10Mbps”));
pointToPoint.SetChannelAttribute (“Delay”, StringValue (“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install (NodeContainer (nodes.Get (0), nodes.Get (1)));
devices.Add (pointToPoint.Install (NodeContainer (nodes.Get (1), nodes.Get (2))));
devices.Add (pointToPoint.Install (NodeContainer (nodes.Get (2), nodes.Get (3))));
// Install 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);
// Set up applications
uint16_t port = 9; // Discard port (RFC 863)
// Server application on node 3
Address serverAddress (InetSocketAddress (Ipv4Address::GetAny (), port));
PacketSinkHelper packetSinkHelper (“ns3::UdpSocketFactory”, serverAddress);
ApplicationContainer sinkApps = packetSinkHelper.Install (nodes.Get (3));
sinkApps.Start (Seconds (1.0));
sinkApps.Stop (Seconds (20.0));
// Client application on node 0
OnOffHelper onoff (“ns3::UdpSocketFactory”, Address (InetSocketAddress (interfaces.GetAddress (3), port)));
onoff.SetConstantRate (DataRate (“1Mbps”));
ApplicationContainer apps = onoff.Install (nodes.Get (0));
apps.Start (Seconds (2.0));
apps.Stop (Seconds (20.0));
// Enable pcap tracing for packet capture
pointToPoint.EnablePcapAll (“network-internet-governance”);
// Enable traffic control
TrafficControlHelper tch;
tch.SetRootQueueDisc (“ns3::RedQueueDisc”);
tch.Install (devices);
// Add policy enforcement callback
tch.GetRootQueueDiscOnDevice (devices.Get (1))->TraceConnectWithoutContext (“Enqueue”, MakeCallback (&EnforcePolicies));
tch.GetRootQueueDiscOnDevice (devices.Get (2))->TraceConnectWithoutContext (“Enqueue”, MakeCallback (&EnforcePolicies));
// Enable flow monitor
FlowMonitorHelper flowmon;
Ptr<FlowMonitor> monitor = flowmon.InstallAll ();
Simulator::Stop (Seconds (20.0));
Simulator::Run ();
// Print per-flow statistics
monitor->CheckForLostPackets ();
Ptr<Ipv4FlowClassifier> classifier = DynamicCast<Ipv4FlowClassifier> (flowmon.GetClassifier ());
std::map<FlowId, FlowMonitor::FlowStats> stats = monitor->GetFlowStats ();
for (std::map<FlowId, FlowMonitor::FlowStats>::const_iterator i = stats.begin (); i != stats.end (); ++i)
{
Ipv4FlowClassifier::FiveTuple t = classifier->FindFlow (i->first);
std::cout << “Flow ” << i->first << ” (” << t.sourceAddress << ” -> ” << t.destinationAddress << “)\n”;
std::cout << ” Tx Bytes: ” << i->second.txBytes << “\n”;
std::cout << ” Rx Bytes: ” << i->second.rxBytes << “\n”;
std::cout << ” Tx Packets: ” << i->second.txPackets << “\n”;
std::cout << ” Rx Packets: ” << i->second.rxPackets << “\n”;
std::cout << ” Throughput: ” << i->second.rxBytes * 8.0 / (i->second.timeLastRxPacket.GetSeconds() – i->second.timeFirstTxPacket.GetSeconds()) / 1024 / 1024 << ” Mbps\n”;
}
Simulator::Destroy ();
return 0;
}
Step 4: Run the Simulation
Now, we can compile and run the simulation script:
sh
./waf configure
./waf build
./waf –run NetworkInternetGovernanceExample
Explanation
- Node Creation: Create nodes that signifies various devices in the network.
- Point-to-Point Links: Amongst the nodes, we have to configure some point-to-point links with certain data rates and delays.
- Internet Stack: Install the Internet stack on all nodes.
- IP Configuration: Dispense IP addresses to the interfaces.
- Applications: To simulate a traffic amongst the nodes, we can use OnOffApplication and PacketSink.
- Traffic Control: Enable traffic control using the RedQueueDisc queue discipline to shape traffic.
- Pcap Tracing: Enable pcap tracing on the point-to-point links to capture packets.
- Policy Enforcement: Execute policies on packets by implementing the function called callback.
- Flow Monitor: Use the FlowMonitor module to aggregate and print statistics on traffic flows.
Step 5: Implement Policy Enforcement
- Access Control:
Depends on the IP addresses or other criteria, we can implement access control polices to confine network access.
cpp
Copy code
void EnforcePolicies (Ptr<Packet> packet, Ptr<NetDevice> device, Ptr<QueueDiscItem> item)
{
// Drop packets from specific source IP
Ipv4Header ipv4Header;
packet->PeekHeader (ipv4Header);
if (ipv4Header.GetSource () == Ipv4Address (“10.1.1.1”))
{
item->Drop (PacketDropReason::POLICY);
NS_LOG_UNCOND (“Dropping packet from 10.1.1.1”);
}
}
- Quality of Service (QoS):
Prioritize the specific kind of traffic by implementing QoS policies.
void EnforcePolicies (Ptr<Packet> packet, Ptr<NetDevice> device, Ptr<QueueDiscItem> item)
{
// Prioritize packets from specific source IP
Ipv4Header ipv4Header;
packet->PeekHeader (ipv4Header);
if (ipv4Header.GetSource () == Ipv4Address (“10.1.1.2”))
{
// Set priority to high
item->SetPriority (0);
NS_LOG_UNCOND (“Prioritizing packet from 10.1.1.2”);
}
}
- Traffic Shaping:
Execute traffic shaping to control the bandwidth and delay of traffic flows.
TrafficControlHelper tch;
tch.SetRootQueueDisc (“ns3::TbfQueueDisc”, “Burst”, StringValue (“500B”), “Rate”, DataRateValue (DataRate (“5Mbps”)));
tch.Install (devices);
- Policy-Based Routing:
We have to control the paths that takes the packets through the network by executing policy-based routing.
Ipv4StaticRoutingHelper ipv4RoutingHelper;
Ptr<Ipv4StaticRouting> staticRouting = ipv4RoutingHelper.GetStaticRouting (nodes.Get (0)->GetObject<Ipv4> ());
staticRouting->AddNetworkRouteTo (Ipv4Address (“10.1.2.0”), Ipv4Mask (“255.255.255.0”), Ipv4Address (“10.1.1.2”), 1);
Finally, we thoroughly provided the details on how to implement network internet governance in the ns3 tool and we can also offer extra information about the internet governance or the ns3, if you need.
To achieve optimal performance analysis and implementation of Network Internet Governance through ns3simulation, we invite you to seek assistance from our experts. The developers at ns3simulation.com will provide you with detailed project execution steps tailored to your specific area, ensuring the best possible outcomes.