How to Install OTCL.H Packages in Ns2

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The Otcl.h Header serves as an essential element for the integration of Object Tcl (OTcl) with the sophisticated C++ simulation engine. OTcl, the scripting language employed in NS-2, is pivotal for defining and orchestrating simulations, while C++ underpins the foundational functionalities. Within the otcl.h file lies a wealth of declarations that facilitate the connection between these two languages, ensuring the fluid execution of simulations where TCL scripts, crafted in OTcl, engage with C++ objects. This file encompasses class declarations tailored for managing OTcl objects and commands, alongside methods designed to bind C++ objects to OTcl commands, thus allowing for their manipulation and invocation within TCL scripts. Additionally, it features functions that enable the exchange of data between OTcl and C++ environments, fostering a dynamic two-way communication. This synergy empowers NS-2 users to command and enhance the simulator through TCL scripts while harnessing the robust performance and capabilities offered by C++. In this elegant framework, intricate simulations are constructed in TCL, while pivotal network behaviors are executed within the C++ backend.

PRE-REQUISITES:

  1. Fresh installation of Ubuntu 16.04 LTS:

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Fresh installation of Ubuntu 16.04 LTS

2.NS-ALLINONE-2.35 Installation:

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3.NS-2.35 Installation: 

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NS-2.35 Installation

Here, Percentage (%)  symbol Denotes the successful installation of the NS 2.35 Simulator.

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NS-2.35 Installation

HEADER FILE VERIFICATION:

  1. Locate to the ns-2.35 folder:

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Locate to the ns-2.35 folder

2.Create the Main.tcl file in the scratch folder:

Next we need to create the Main.tcl file by using text editor in the ns-2.35 folder.

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Next we need to paste the below code to the Main.tcl file and save the file in the ns-2.35 folder.

Code:

set ns [new Simulator]

set tracefile [open out.tr w]

set namfile [open out.nam w]

$ns trace-all $tracefile

$ns namtrace-all $namfile

proc finish {} {

    global ns tracefile namfile

    $ns flush-trace

    close $tracefile

    close $namfile

    exec nam out.nam &

    exit 0}

set n0 [$ns node]

set n1 [$ns node]

set n2 [$ns node]

set n3 [$ns node]

$ns color 0 blue

$ns duplex-link $n0 $n1 1Mb 10ms DropTail

$ns duplex-link $n1 $n2 1Mb 10ms DropTail

$ns duplex-link $n2 $n3 1Mb 10ms DropTail

set tcp [new Agent/TCP]

$ns attach-agent $n0 $tcp

set sink [new Agent/TCPSink]

$ns attach-agent $n3 $sink

$ns connect $tcp $sink

set ftp [new Application/FTP]

$ftp attach-agent $tcp

$ns at 0.5 “$ftp start”

$ns at 4.5 “$ftp stop”

$ns at 5.0 “finish”

$ns run

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Create the Main.tcl file in the scratch folder

3.Open the Terminal:

Next, we need to launch the terminal by right clicking the mouse in the ns-2.35 location.

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Open the Terminal

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Open the Terminal

4.NS-2.35 Configuration && Building Process:

Next, we need to configure and build the ns-2.35 folder to make the Created files need to work in ns-2.35 configuration.

Command:      “./make”

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NS-2.35 configuration && Building Process

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NS-2.35 configuration && Building Process

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NS-2.35 configuration && Building Process

5.Importing Otcl.h:

Here we imported the Otcl.h header file code indirectly accessed the Otcl header (set n0 [$ns node]) is responsible for creating OTcl objects that represent the nodes defined in the Tcl script, allowing them to be manipulated within this example program. Here we highlighted the code line that highlighted which is internally accessed Otcl.h that we will show class file that used in this code via Otcl folder.

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Importing otcl.h

Here we will show the header file by opening Otcl.h file to show the class or function imported from the Otcl.h in the example code. The Highlighted Lines in the header code refers to the tcl script code (set n0 [$ns node]) is responsible for creating OTcl objects that represent the nodes defined in the Tcl script, allowing them to be manipulated within the simulation.

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Importing otcl.h

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Importing otcl.h

6.Executing the Example Program for Packet Header:

Then we need to run the Example program for Packet Header to view output of the program.

Command:      “./ns Main.tcl”

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Executing the Example Program for otcl Header

Here we shown the output of the example program by using Otcl.h.

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Executing the Example Program for otcl Header

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Executing the Example Program for otcl Header

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Executing the Example Program for otcl Header

In the NS 2.35 Simulation Example Program, the Otcl.h Header file is successfully imported. Drop us a message to guide you more. ns2projects.com squad is here to help you get the perfect OTCL.H PACKAGES that fit your needs. Our development team is dedicated to helping you achieve the best outcomes. We’ve got all the right tools and resources to support you when you need it most.

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