To implement the “Fastest” routing protocol in ns3, we require to follow various steps. It consists to make protocols core functionalities, incorporated it with ns3 and offers the helper classes for at ease usage and testing. Get your performance analysis done on “Fastest” routing protocol from ns3simulation.com, we provide you with best results.
The given below is the complete procedure to implement the fastest protocol in ns3 environment:
Prerequisites
- Ns3 Installation: Make certain ns3 is installed in the computer.
- C++ Programming: understanding of C++ is required.
- Understanding of ns-3: knowledge with ns-3 modules and basic simulation scripts.
Steps to Implement Fastest Protocol
- Set Up the Development Environment
Make certain that you have installed ns3.if not then download and install it from official ns3 website.
- Create a New Protocol Module
Navigate to the src directory in ns-3 and create a new directory for your protocol.
cd ns-3.XX/src
mkdir fastest
cd fastest
mkdir model helper test
- Define the Protocol Classes and Headers
Create header and implementation files for your protocol in the model directory.
fastest-routing-protocol.h
#ifndef FASTEST_ROUTING_PROTOCOL_H
#define FASTEST_ROUTING_PROTOCOL_H
#include “ns3/ipv4-routing-protocol.h”
#include “ns3/ipv4-address.h”
#include “ns3/timer.h”
#include “ns3/node.h”
#include “ns3/socket.h”
#include “ns3/net-device.h”
#include “ns3/packet.h”
#include “ns3/nstime.h”
#include <map>
namespace ns3 {
class FastestRoutingProtocol : public Ipv4RoutingProtocol {
public:
static TypeId GetTypeId (void);
FastestRoutingProtocol ();
virtual ~FastestRoutingProtocol ();
virtual void DoDispose (void);
// Implement required virtual functions from Ipv4RoutingProtocol
virtual Ptr<Ipv4Route> RouteOutput (Ptr<Packet> p, const Ipv4Header &header,
Ptr<NetDevice> oif,
Socket::SocketErrno &sockerr);
virtual bool RouteInput (Ptr<const Packet> p, const Ipv4Header &header,
Ptr<const NetDevice> idev,
UnicastForwardCallback ucb,
MulticastForwardCallback mcb,
LocalDeliverCallback lcb,
ErrorCallback ecb);
virtual void NotifyInterfaceUp (uint32_t interface);
virtual void NotifyInterfaceDown (uint32_t interface);
virtual void NotifyAddAddress (uint32_t interface, Ipv4InterfaceAddress address);
virtual void NotifyRemoveAddress (uint32_t interface, Ipv4InterfaceAddress address);
virtual void SetIpv4 (Ptr<Ipv4> ipv4);
private:
Ptr<Ipv4> m_ipv4;
std::map<Ipv4Address, Ptr<Ipv4Route>> m_routingTable;
// Additional methods for maintaining and updating routing table based on fastest path metric
void UpdateRoutingTable (void);
void FindFastestRoute (void);
};
} // namespace ns3
#endif // FASTEST_ROUTING_PROTOCOL_H
fastest-routing-protocol.cc
#include “fastest-routing-protocol.h”
#include “ns3/log.h”
#include “ns3/simulator.h”
#include “ns3/ipv4-header.h”
#include “ns3/ipv4-route.h”
#include “ns3/inet-socket-address.h”
#include “ns3/inet6-socket-address.h”
#include “ns3/udp-socket-factory.h”
#include “ns3/uinteger.h”
namespace ns3 {
NS_LOG_COMPONENT_DEFINE (“FastestRoutingProtocol”);
NS_OBJECT_ENSURE_REGISTERED (FastestRoutingProtocol);
TypeId FastestRoutingProtocol::GetTypeId (void) {
static TypeId tid = TypeId (“ns3::FastestRoutingProtocol”)
.SetParent<Ipv4RoutingProtocol> ()
.SetGroupName (“Internet”)
.AddConstructor<FastestRoutingProtocol> ();
return tid;
}
FastestRoutingProtocol::FastestRoutingProtocol () {
NS_LOG_FUNCTION (this);
}
FastestRoutingProtocol::~FastestRoutingProtocol () {
NS_LOG_FUNCTION (this);
}
void FastestRoutingProtocol::DoDispose () {
NS_LOG_FUNCTION (this);
Ipv4RoutingProtocol::DoDispose ();
}
Ptr<Ipv4Route> FastestRoutingProtocol::RouteOutput (Ptr<Packet> p, const Ipv4Header &header, Ptr<NetDevice> oif, Socket::SocketErrno &sockerr) {
NS_LOG_FUNCTION (this << p << header << oif);
// Implement route output logic here
Ipv4Address dest = header.GetDestination();
auto it = m_routingTable.find(dest);
if (it != m_routingTable.end()) {
return it->second;
}
sockerr = Socket::ERROR_NOROUTETOHOST;
return Ptr<Ipv4Route> ();
}
bool FastestRoutingProtocol::RouteInput (Ptr<const Packet> p, const Ipv4Header &header,
Ptr<const NetDevice> idev, UnicastForwardCallback ucb,
MulticastForwardCallback mcb, LocalDeliverCallback lcb,
ErrorCallback ecb) {
NS_LOG_FUNCTION (this << p << header << idev);
// Implement route input logic here
Ipv4Address dest = header.GetDestination();
Ipv4Address local = m_ipv4->GetAddress(1, 0).GetLocal();
if (dest == local) {
lcb (p, header);
return true;
}
auto it = m_routingTable.find(dest);
if (it != m_routingTable.end()) {
ucb (it->second, p, header);
return true;
}
ecb (p, header, Socket::ERROR_NOROUTETOHOST);
return false;
}
void FastestRoutingProtocol::NotifyInterfaceUp (uint32_t interface) {
NS_LOG_FUNCTION (this << interface);
}
void FastestRoutingProtocol::NotifyInterfaceDown (uint32_t interface) {
NS_LOG_FUNCTION (this << interface);
}
void FastestRoutingProtocol::NotifyAddAddress (uint32_t interface, Ipv4InterfaceAddress address) {
NS_LOG_FUNCTION (this << interface << address);
}
void FastestRoutingProtocol::NotifyRemoveAddress (uint32_t interface, Ipv4InterfaceAddress address) {
NS_LOG_FUNCTION (this << interface << address);
}
void FastestRoutingProtocol::SetIpv4 (Ptr<Ipv4> ipv4) {
NS_LOG_FUNCTION (this << ipv4);
m_ipv4 = ipv4;
}
void FastestRoutingProtocol::UpdateRoutingTable (void) {
NS_LOG_FUNCTION (this);
// Implement logic to update the routing table based on the fastest path metric
}
void FastestRoutingProtocol::FindFastestRoute (void) {
NS_LOG_FUNCTION (this);
// Implement logic to find the fastest route based on the desired metrics
}
} // namespace ns3
- Integrate with ns-3 Build System
Update the wscript file in the src directory to include your new protocol.
src/fastest/wscript
def build(bld):
module = bld.create_ns3_module(‘fastest’, [‘core’, ‘network’, ‘internet’])
module.source = [
‘model/fastest-routing-protocol.cc’,
]
headers = bld(features=’ns3header’)
headers.module = ‘fastest’
headers.source = [
‘model/fastest-routing-protocol.h’,
]
- Create Helper and Test Classes
Create helper and test classes to facilitate the usage and testing of your protocol.
fastest-helper.h
#ifndef FASTEST_HELPER_H
#define FASTEST_HELPER_H
#include “ns3/fastest-routing-protocol.h”
#include “ns3/node-container.h”
#include “ns3/ipv4-routing-helper.h”
namespace ns3 {
class FastestHelper : public Ipv4RoutingHelper {
public:
FastestHelper ();
FastestHelper* Copy (void) const;
virtual Ptr<Ipv4RoutingProtocol> Create (Ptr<Node> node) const;
private:
};
} // namespace ns3
#endif // FASTEST_HELPER_H
fastest-helper.cc
#include “fastest-helper.h”
#include “ns3/fastest-routing-protocol.h”
#include “ns3/ipv4-routing-protocol.h”
#include “ns3/ipv4-list-routing.h”
#include “ns3/log.h”
namespace ns3 {
NS_LOG_COMPONENT_DEFINE (“FastestHelper”);
FastestHelper::FastestHelper () {
}
FastestHelper* FastestHelper::Copy (void) const {
return new FastestHelper (*this);
}
Ptr<Ipv4RoutingProtocol> FastestHelper::Create (Ptr<Node> node) const {
Ptr<FastestRoutingProtocol> agent = CreateObject<FastestRoutingProtocol> ();
node->AggregateObject (agent);
return agent;
}
} // namespace ns3
- Build and Test
- Rebuild ns-3 to include your new protocol.
./waf configure
./waf build
- Create test scripts to verify the implementation of your protocol.
scratch/test-fastest.cc
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/fastest-helper.h”
#include “ns3/ipv4-static-routing-helper.h”
#include “ns3/ipv4-list-routing-helper.h”
using namespace ns3;
int main (int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse (argc, argv);
NodeContainer nodes;
nodes.Create (2);
InternetStackHelper internet;
FastestHelper fastest;
Ipv4ListRoutingHelper list;
list.Add (fastest, 10);
internet.SetRoutingHelper (list);
internet.Install (nodes);
// Add additional setup code here
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
- Run and Debug
Run your test script and debug any issues that arise.
./waf –run scratch/test-fastest
Here we had understood how the fastest routing protocol analysis and run in ns3tool. We also provide the related implementation support about fastest routing protocol.