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

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

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.

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

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

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.

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.

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.

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.

TODO

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.

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