OOP Network Simulator

This project was developed as part of the Object-Oriented Programming Laboratory course at Escola Politécnica da Universidade de São Paulo (USP).
It implements a simplified computer network simulator in C++, applying object-oriented programming principles.

🚀 Overview

The simulator models a small-scale computer network composed of:

• Routers and QoS-enabled routers (with priority queues)
• Hosts (end devices capable of running chat processes)
• Chats (processes that exchange messages through the network)
• Datagrams and Segments (representing packets and transport-layer messages)
• Scheduler (to simulate the passage of time and event processing)
• Persistence (loading network configurations from a file)

This project builds upon a first version (EP1) by introducing end-to-end communication between processes, support for hosts, and priority-based message forwarding.

🛠️ Features

• Object-oriented C++ design with:
  • Classes: Rede, No, Roteador, RoteadorComQoS, Hospedeiro, Chat, Datagrama, Segmento, Fila, FilaComPrioridade, Agendador, TabelaDeRepasse, Evento, PersistenciaDeRede, etc.
• Simulates message transmission between processes (chats) in different hosts.
• Routing and forwarding of packets with configurable delays.
• Priority queue support to simulate Quality of Service (QoS).
• Console-based interface for:
  • Loading a network from a configuration file
  • Sending messages between chats
  • Advancing simulation time

📂 Project Structure

Project Structure

The code is organized with one header (.h) and one implementation (.cpp) file for each class.
Key files include:

• main.cpp — console interface to run the simulator
• Rede.* — network management
• No.*, Roteador.*, RoteadorComQoS.*, Hospedeiro.* — network nodes
• Chat.* — process for message exchange
• Datagrama.*, Segmento.* — packet and transport-layer segment
• Fila.*, FilaComPrioridade.* — queues for packets
• TabelaDeRepasse.* — routing table
• Evento.*, Agendador.* — event scheduling and time simulation
• PersistenciaDeRede.* — loading network configuration from files

🎓 Academic Context

This project was part of PCS3111 - Object-Oriented Programming Laboratory for Electrical Engineering at USP.
It was designed to practice:

• Object-oriented concepts (encapsulation, inheritance, polymorphism, abstract classes)
• Exception handling in C++
• Modular program design
• Simulation of distributed systems