Book Image

Hands-On System Programming with C++

By : Dr. Rian Quinn
Book Image

Hands-On System Programming with C++

By: Dr. Rian Quinn

Overview of this book

C++ is a general-purpose programming language with a bias toward system programming as it provides ready access to hardware-level resources, efficient compilation, and a versatile approach to higher-level abstractions. This book will help you understand the benefits of system programming with C++17. You will gain a firm understanding of various C, C++, and POSIX standards, as well as their respective system types for both C++ and POSIX. After a brief refresher on C++, Resource Acquisition Is Initialization (RAII), and the new C++ Guideline Support Library (GSL), you will learn to program Linux and Unix systems along with process management. As you progress through the chapters, you will become acquainted with C++'s support for IO. You will then study various memory management methods, including a chapter on allocators and how they benefit system programming. You will also explore how to program file input and output and learn about POSIX sockets. This book will help you get to grips with safely setting up a UDP and TCP server/client. Finally, you will be guided through Unix time interfaces, multithreading, and error handling with C++ exceptions. By the end of this book, you will be comfortable with using C++ to program high-quality systems.
Table of Contents (16 chapters)

Studying an example on the UDP echo server

In this example, we will walk you through a simple echo server example using UDP. An echo server (as is the same with our previous chapters) echoes any input to its output. In the case of this UDP example, the server echoes data sent to it from a client back to the client. To keep the example simple, character buffers will be echoed. How to properly process structured packets will be covered in the following examples.


To start, we must define the maximum buffer size we plan to send from the client to the server and back, and we must also define the port we wish to use:

#define PORT 22000
#define MAX_SIZE 0x10

It should be noted that any port number will do so long as it is above...