Sliding Window Algorithm

Transfers data over UDP protocol using Sliding Window Algorithm implemented in C++.

Brief Description

The main functionality of this project is transfering data over UDP protocol using Sliding Window Algorithm. This project is written in C++.

Project Structure

This project consists of 2 main programs and in total of 5 files that contain data structure definitions as well as helper functions for the main program. All source codes are located in src/ directory. The data/ directory contains sample data which are to be transferred by the receiver to the sender.

Directory Tree

Below is the directory tree for this project.

udp-sliding-window/
├── data/
│   ├── test.jpg
│   └── test.txt
├── src/
│   ├── packets.cpp
│   ├── packets.h
│   ├── sender.cpp
│   ├── sliding_window.h
│   └── receiver.cpp
└── Makefile

Getting Started

This project is developed and tested on machines running Debian 9 and Ubuntu 16.

Installation

For building this project, a Makefile file is included for convenience. In the project root directory, type in the following command in terminal.

$ make

This will create 2 executables, sendfile for sending files and recvfile for receiving files.

Usage

This project consists of 2 executables, sendfile that acts as the sender and recvfile that acts as the receiver.

Note: Make sure that the sender and receiver runs on the same network.

Sender

The sendfile executable takes 5 extra arguments. To run sendfile, in terminal type in the following command.

$ ./sendfile <filename> <windowsize> <buffersize> <destination_ip_address> <destination_port>

Here is the explanation for each argument:

• ./sendfile runs the sendfile executable.
• <filename> is the name of the file which is to be transported.
• <windowsize> is the size of the sender sliding window (SSW) in n * 1024 bytes.
• <buffersize> is size of the buffer in n * 1024 bytes.
• <destination_ip_address> is the IP address of the receiver.
• <destination_port> is the port where the receiver would receive the data.

Execution example:

$ ./sendfile test.txt 5 100 127.0.0.1 9000

This means it sends test.txt to localhost:9000 with SWS is 5 * 1024 bytes and buffer size is 100 * 1024 bytes.

Receiver

The receiver executable takes 4 extra arguments. To run receiver, in terminal type in the following command.

$ ./recvfile <filename> <windowsize> <buffersize> <port>

Here is the explanation for each argument:

• ./recvfile runs the recvfile executable.
• <filename> is the file name of the received data which are to be stored.
• <windowsize> is the size of the receiver sliding window (RSW) in n * 1024 bytes.
• <buffersize> is size of the buffer in n * 1024 bytes.
• <port> is the port to listen in order to receive the data.

Execution example:

$ ./recvfile test.txt 5 100 9000

This means it receives data in port 9000 and stores the data in test.txt with SWS is 5 * 1024 bytes and buffer size is 100 * 1024 bytes.

How The Program Works

TODO

Final Statements

About This Project

This project was created for the first assignment of IF3130 Computer Networks course (Fall 2018 term), Computer Science Bachelor's Degree Program, Institut Teknologi Bandung.

Contributors

• Dionesius Agung Andika P (13516043)
• Dinda Yora I (13516067)
• Maharani Devira (13516142)