Routing Algorithms in Computer Networks

Routing Algorithms in Computer Networks

          This article is about the process of implementing the routing algorithms along with the sample source code in computer networks.

Step: 1 Categories of Routing Algorithms

As first, let’s know the most significant classifications of routing algorithms in the following.

  • Non adaptive routing algorithm
  • Adaptive routing algorithm

Step: 2 Source Code for Routing Algorithms

        In addition, our technical experts have highlighted the sample source code the process of routing algorithms in computer networks.

  • AODV based configuration
AodvHelper aodv;
InternetStackHelper stack;
stack.SetRoutingHelper (aodv);
stack.Install (nodes);
  • Header file initialization
#include "ns3/aodv-module.h"
#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/mobility-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/wifi-module.h"
#include "ns3/v4ping-helper.h"
#include
  • AODV neighbor detection
Neighbors::Neighbors (Time delay) :
m_ntimer (Timer::CANCEL_ON_DESTROY) {
m_ntimer.SetDelay (delay);
m_ntimer.SetFunction (&Neighbors::Purge, this);
m_txErrorCallback = MakeCallback (&Neighbors::ProcessTxError, this);
}
bool
Neighbors::IsNeighbor (Ipv4Address addr) {
Purge ();
for (std::vector::const_iterator i = m_nb.begin ();
i != m_nb.end (); ++i)
{
if (i->m_neighborAddress == addr)
return true;
}
return false;
}
Time
Neighbors::GetExpireTime (Ipv4Address addr)
{
Purge ();
for (std::vector::const_iterator i = m_nb.begin (); i
!= m_nb.end (); ++i)
{
if (i->m_neighborAddress == addr)
return (i->m_expireTime - Simulator::Now ());
}
return Seconds (0);
}
void
Neighbors::Update (Ipv4Address addr, Time expire)
{
for (std::vector::iterator i = m_nb.begin (); i != m_nb.end (); ++i)
if (i->m_neighborAddress == addr)
{
i->m_expireTime
= std::max (expire + Simulator::Now (), i->m_expireTime);
if (i->m_hardwareAddress == Mac48Address ())
i->m_hardwareAddress = LookupMacAddress (i->m_neighborAddress);
return;
}
NS_LOG_LOGIC ("Open link to " << addr);
Neighbor neighbor (addr, LookupMacAddress (addr), expire + Simulator::Now ());
m_nb.push_back (neighbor);
Purge ();
}

Step: 3 Run Routing Algorithm Process

           Finally, we have highlighted the process of running routing algorithms and that through the execution of the following commands.

cd /home/research/ns-allinone-3.26/ns-3.26

sudo ./waf –run aodv –vis

Running Algorithm Process

        Moreover, we have highlighted the result that is acquired through the process of running routing algorithm process.

         The research scholars can reach us to get to know about the significant functions of routing algorithms in the computer networks.

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