PSR - Network Systems Programming

This repository contains practical implementations developed during the "Programmazione di Sistemi in Rete (PSR)" (Network Systems Programming) course at Università degli Studi del Sannio. The project focuses on web systems programming with an emphasis on TCP and UDP socket communication in both C and Java. It includes examples of client-server architectures, concurrent connection handling, and data transmission over networks.

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📑 Table of Contents

• Project Overview
• Repository Structure
• Requirements
• Installation and Usage
  • 1. Clone the Repository
  • 2. Compile and Run (C Projects)
  • 3. Compile and Run (Java Projects)
• Implemented Features
• Testing and Results
• License
• Acknowledgments

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📖 Project Overview

The PSR project aims to provide hands-on experience with network programming concepts and practical implementations. It covers:

• TCP and UDP communication
• Client-server models in both C and Java
• Concurrent connections management (e.g., multi-threaded servers)
• Data serialization and transmission techniques
• Socket creation and management in different scenarios (e.g., echo servers, file transfer applications)

This repository serves as a learning tool for understanding low-level network communication and building robust networked applications.

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🗂️ Repository Structure

PSR/
├── C/
│   ├── tcp_server.c          # TCP server implementation in C
│   ├── tcp_client.c          # TCP client implementation in C
│   ├── udp_server.c          # UDP server implementation in C
│   ├── udp_client.c          # UDP client implementation in C
│   └── Makefile              # Build automation for C programs
├── Java/
│   ├── TCPServer.java        # TCP server implementation in Java
│   ├── TCPClient.java        # TCP client implementation in Java
│   ├── UDPServer.java        # UDP server implementation in Java
│   ├── UDPClient.java        # UDP client implementation in Java
├── tests/                    # Test scripts and sample data
├── results/                  # Execution logs and output files
├── LICENSE                   # Project license information
└── README.md                 # Project documentation

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⚙️ Requirements

Ensure you have the following installed:

• GCC compiler (for C programs)
• Java JDK (version 8 or higher)
• Make (for compiling C projects)
• Terminal or command-line interface for running programs

Install Dependencies (Ubuntu/Debian):

sudo apt update
sudo apt install build-essential default-jdk

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🚀 Installation and Usage

1. Clone the Repository

git clone https://github.com/sroman0/PSR.git
cd PSR

2. Compile and Run (C Projects)

Compile all C programs:

cd C
make all

Run TCP Server and Client:

./tcp_server
./tcp_client

Run UDP Server and Client:

./udp_server
./udp_client

3. Compile and Run (Java Projects)

Navigate to the Java folder and compile:

cd ../Java
javac TCPServer.java TCPClient.java UDPServer.java UDPClient.java

Run TCP Server and Client:

java TCPServer
java TCPClient

Run UDP Server and Client:

java UDPServer
java UDPClient

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💡 Implemented Features

• TCP and UDP Servers/Clients: Establish and manage connections.
• Concurrent Servers: Handle multiple clients simultaneously.
• Reliable and Unreliable Data Transmission: Demonstrate the differences between TCP and UDP.
• File Transfer Applications: Send and receive files over the network.
• Error Handling: Robust error detection and reporting.

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🧪 Testing and Results

• Test scripts are available in the tests/ directory.
• Execution results and logs can be found in the results/ folder.
• Example test run:

./tests/test_tcp_connection.sh
./tests/test_udp_packet_loss.sh

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📜 License

This project is licensed under the GNU General Public License v3.0.
See the LICENSE file for details.

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🙏 Acknowledgments

Developed during the "Programmazione di Sistemi in Rete (PSR)" course at Università degli Studi del Sannio.
Special thanks to the instructors and classmates for their support and guidance.