COMP 7005 Assignment 3 - Client/Server Application

Author:

Matthew Puyat A01272463 February 14, 2025

Purpose

This client/server application demonstrates network communication using network sockets. The application uses two sockets (client and server) that communicate over an agreed IP address and port. The client sends a key and the contents of a file to the server, which encrypts the contents using the key and returns the encrypted data to the client. The server has I/O multiplexing abilities, allowing it to handle multiple clients (up to a preset limit of 5).

Clone the Repository

To obtain the project, clone the GitHub repository: bash git clone https://github.com/Matirix/NetworkSocketsMultiplexing.git

Running the Application

Starting the Server

Run the server with the following command: bash python3 ./server.py -i <ip_addr> -p <port>

• <ip_addr>: The IP address the server will bind to.
• <port>: The port the server will bind to.
• -e: Run example with localhost and port set to 3333.

Starting the Client

Run the client with the following command: bash python3 ./client.py -i <ip_addr> -p <port> -f <filename> -k <key> or bash python3 ./client.py -e

• <ip_addr>: The IP address the client will connect to.
• <port>: The port the client will connect to.
• <filename>: The name of the file the client will send.
• <key>: The encryption key the server will use to encrypt the file.
• -e: Run example with localhost and port set to 3333, key aaaabbb, and file hello world zzzzz.

Command Line Arguments

server.py

Variable	Purpose
<ip_addr>	IP address the server will bind to.
<port>	Port the server will bind to.
-e	Example run with localhost 127.0.0.1 and port 3333.

client.py

Variable	Purpose
<ip_addr>	IP address the client will connect to.
<port>	Port the client will connect to.
<filename>	The name of the file the client will read.
<key>	The encryption key the server will use.
-e	Example run with localhost 127.0.0.1 and port 3333, key aaaabbb, and file hello world zzzzz.

Examples

Basic Example

python3 ./server.py 127.0.0.1 3333 // Localhost and Port python3./client.py 127.0.0.1 8080 test1.txt ‘key’ // name of the file

python3 ./server.py 192.168.3.1 8080 // Localhost and Port python3 ./client.py 192.168.3.1 8080 test2.txt ‘abc’ // name of the file

bash python3 ./server.py 127.0.0.1 3333

& python3./client.py 127.0.0.1 8080 test2.txt ‘key’
& python3 ./client.py 127.0.0.1 8080 test3.txt ‘key’
& python3 ./client.py 127.0.0.1 8080 test4.html ‘key’
& python3 ./client.py 127.0.0.1 8080 test5.txt ‘key’

// Concurrently processes 5 test files