How to Start Route Source Protocol Projects using OMNeT++

To stimulate a Source Routing Protocol project in OMNeT++ has been involves their replicate a routing protocol in which every data packet contains the complete list of intermediate nodes such as routers which the packet will traverse, as opposed to traditional routing in which every router makes an independent decision based on a routing table.

Source routing protocols are used in networks in which the source node stipulates the complete route the packet should track to reach its destination. This kind of routing is generally used in some particular network environment, like as MPLS (Multiprotocol Label Switching), or in ad-hoc networks in which the routing is detailed through the sender.

Below is a step-by-step guide to get started with simulating a source routing protocol using OMNeT++.

Steps to Start Route Source Protocol Projects using OMNeT++

  1. Understand the Scope of Source Routing Protocols

Source routing protocols has been including the following important features:

  • Route Specification: The transfer such as source node regulates the route for the packet and involves the list of intermediate nodes for sample hops in the packet header.
  • No Need for Routing Tables: Intermediate nodes do not require to handle the complete routing tables; they simply transfer the packet to the next hop according on the route data in the packet header.
  • Use Case: Typically used in ad-hoc or MANET like as Mobile Ad-hoc Network situations, or specialized networks such as MPLS.

The goal of your project might be:

  • Execute the custom source routing protocol.
  • Replicating the source routing in MANETs such as Mobile Ad-hoc Networks.
  • A scenario replicating in which the transfer a specifies the path, and intermediate the nodes only forward the packet.
  1. Set Up OMNeT++ and INET Framework

OMNeT++ offers a powerful replication setting, and the INET Framework has been contains the modules which helps routing protocols, network devices, and communication stacks.

Install OMNeT++:

  • Download and install OMNeT++ from the official OMNeT++ website.
  • Observe the installation instructions to setting the OMNeT++ on your operating system.

Install INET Framework:

  • INET is the framework used in OMNeT++ for replicating the Internet protocols and network components, has includes the routing protocols.
  • Download INET from the INET GitHub repository.
  • Next downloading, the import and create an INET in OMNeT++ IDE. This involved the help for several protocols such as IPv4, OSPF, and TCP, that we can extend to execute the source routing.
  1. Create a New OMNeT++ Project
  1. Open OMNeT++ IDE.
  2. Create a new OMNeT++ project:
    • Go to File > New > OMNeT++ Project.
    • Name the project such as SourceRoutingProtocolProject.
  3. Link the project to the INET framework:
    • Right-click on your project in the Project Explorer and select Properties > Project References.
    • Assure which the INET is selected.
  1. Define the Network Topology (NED File)

The NED file describes the network topology. Intended for source routing, we will be replicating a network through routers and nodes which transmit the packets along a predefined route. Every packet should contain a list of hops.

Example Network Topology:

network SourceRoutingNetwork {

submodules:

router1: Router {

@display(“p=100,100”);

}

router2: Router {

@display(“p=300,100”);

}

router3: Router {

@display(“p=500,100”);

}

host1: StandardHost {

@display(“p=100,300”);

}

host2: StandardHost {

@display(“p=500,300”);

}

connections allowunconnected:

host1.pppg++ <–> router1.pppg++;

router1.pppg++ <–> router2.pppg++;

router2.pppg++ <–> router3.pppg++;

router3.pppg++ <–> host2.pppg++;

}

In this topology:

  • The host1 and host2 are the source and destination hosts are correspondingly.
  • The router1, router2, and router3 are the intermediate routers.
  1. Configure Source Routing in OMNeT++

We execute the source routing; we require to describe the source and destination as well as the routing path in the OMNeT++ configuration file such as omnetpp.ini.

Intended for a source routing protocol, the transmit such as source host necessity for specify the whole path such as the list of routers which will track the packet. This data is usually embedded in the packet header.

Example Configuration in omnetpp.ini:

[General]

network = SourceRoutingNetwork

sim-time-limit = 100s

# Configure Hosts’ IP Addresses

*.host1.ipv4.address = “192.168.1.1”

*.host2.ipv4.address = “192.168.1.2”

*.router1.ipv4.address = “192.168.2.1”

*.router2.ipv4.address = “192.168.2.2”

*.router3.ipv4.address = “192.168.2.3”

# Configure the source routing packet format

*.host1.app[0].typename = “SourceRoutingApp”

*.host1.app[0].destAddr = “192.168.1.2”

*.host1.app[0].route = “router1,router2,router3”  # Source specifies the full route

# Logging for debugging

*.host1.app[0].debug = true

In this example:

  • The source host such as host1 particular the destination address for route the packet will take like router1, router2, router3.
  • The routers such as router1, router2, router3 transfer the packet along the predefined route.
  1. Implement Source Routing Logic

We execute a custom source routing protocol; we require to build a modify application or alter a previous one to maintain the source routing logic.

Create a Custom Application (SourceRoutingApp)

We will require to execute an application such as SourceRoutingApp that:

  • Transfer the packets by a list of hops such as routers in the packet header.
  • Sending the packets to the next hop in the route according to the list of hops.
  • Stops the forwarding after the destination is reached.

Basic Code for SourceRoutingApp:

class SourceRoutingApp : public cSimpleModule {

private:

cMessage *timer;

std::vector<std::string> route;  // List of routers for source routing

int currentHop;  // Keeps track of the current hop

protected:

virtual void initialize() override {

timer = new cMessage(“sendPacket”);

route = {“router1”, “router2”, “router3”};  // Hardcoded route (for simplicity)

currentHop = 0;

scheduleAt(simTime() + 1.0, timer);  // Schedule packet transmission

}

 

virtual void handleMessage(cMessage *msg) override {

if (msg == timer) {

// Create a packet with the current route information

auto pkt = new cPacket(“sourcePacket”);

pkt->addPar(“route”).setStringValue(route[currentHop].c_str());

// Send packet to the next hop (defined by the current route)

send(pkt, “out”);

currentHop++;

if (currentHop < route.size()) {

scheduleAt(simTime() + 1.0, timer);  // Continue sending packets

} else {

cancelAndDelete(timer);  // Stop after last hop

}

}

}

};

This application:

  • Initializes the route such as router1, router2, router3 and schedules a timer we transfer the packets.
  • Handles messages: Intended for each timer event the packet is forwarding to the next hop in the route.

We can extend this application we used the dynamic source routing, that route is computed or updated during process time according to the network conditions.

  1. Run the Simulation and Test

Once the routing protocol is executed, process the replication and validate it:

  1. Run the simulation from OMNeT++ IDE.
  2. Used the process for Tkenv such as OMNeT++ graphical environment we display the packet transmission and routing.
  3. Ensure the logging and debugging we follow on the transmit of packets by the source-specified route.

Enable Debugging in omnetpp.ini:

*.host1.app[0].debug = true

*.router1.debug = true

*.router2.debug = true

  1. Analyze the Results

Once the replication finishes, we can examine the outcomes:

  • Packet Trace: Display the trace of packets by every hop.
  • Routing Behaviour: Assure which the packets are transmit the based on a source-describe the route.
  • Performance Metrics: Gather and examine the statistics like as latency, hop count, and packet delivery success.

You can generate and analyze graphs using OMNeT++’s result analysis tools to assess the protocol’s performance.

In the last, we discussed clearly about Route source protocol inside a protocol that are implemented on source nodes to complete route the packet should track to reach its destination by OMNeT++ implementation tool. In the additional we will provide the interesting information about Route source protocol.

We specialize in managing specific network environments, such as MPLS (Multiprotocol Label Switching) and ad-hoc networks, ensuring your topics are perfectly aligned with your needs. Collaborate with us, and you can leave the challenging research and writing tasks to our capable team. We are eager to assist you in launching your Route Source Protocol Projects using OMNeT++. Simply send your details to phdprojects.org. For a seamless and hassle-free experience, do not hesitate to reach out to us.