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Boost.Asio C++ Network Programming
Boost.Asio C++ Network Programming

Boost.Asio C++ Network Programming: Learn effective C++ network programming with Boost.Asio and become a proficient C++ network programmer

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Boost.Asio C++ Network Programming

Chapter 2. Understanding the Networking Concepts

Before we start coding a network application, it is better for us to understand how a network works. In this chapter, we will dig up network concepts with their contents. The topics that we'll cover in this chapter are as follows:

  • Distinguishing between the OSI model and the TCP/IP model
  • Exploring IP addresses in both IPv4 and IPv6
  • Troubleshooting TCP/IP problems using various tools

An introduction to networking systems

Network architecture is structured with layers and protocols. Each layer in the architecture has its own role, while its main purpose is to offer a certain service to the higher layer and communicate with the adjoining layers. However, a protocol is a collection of rules and conventions that are used by all the communicating parties to standardize the communication process. For instance, when the layer n in a device communicates with another layer n in another device, for the communication to take place, they have to use the same protocol.

There are two popular network architectures that are used nowadays: the Open Systems Interconnection (OSI) and TCP/IP reference models. We will dig deeper to understand each reference model with its advantages and disadvantages so that we can decide which model should be used in our network application.

The OSI reference model

The OSI model is used to connect to the open systems—these are the systems that are...

Understanding TCP and UDP

As we discussed earlier in this chapter in the Transport layer section, TCP and UDP are the main protocols that are used to transfer data across a network. The delivery mechanisms that they have are different from each other. TCP has acknowledgments, sequence numbers, and flow control in transferring data process to provide a guaranteed delivery, whereas UDP does not provide a guaranteed delivery but provides a delivery with best efforts.

Transmission Control Protocol

TCP performs a three-way handshaking process before the protocol establishes the session. This is done in order to provide a guaranteed delivery. Refer to the following figure to understand the three-way handshaking process:

Transmission Control Protocol

From the preceding image, imagine that Carol's device wants to transfer data to Bryan's device and that they need to perform a three-way handshaking process. First, Carol's device sends a packet to Bryan's device with the synchronize (SYN) flag enabled. Once Bryan...

Exploring the Internet Protocol

IP is a primary communication protocol that is used to deliver a datagram across networks. The datagram itself is a transfer unit associated with a packet-switched network. The role of IP is to deliver packets from the host to the host based on the IP address, which is stated in the packet's header. There are two versions of IP that are commonly used nowadays, which are IPv4 and IPv6.

Internet Protocol Version 4 – IPv4

IPv4 has become the standard IP address since 1980s and is used to obtain TCP/IP traffic from a computer to another over the network. An IP address is unique for every device connected over the Internet, and all devices can communicate with each other over the Internet as long as they have a valid IP address.

A valid IP address is constructed by four decimal numbers that are separated by three dots. The address only contains a decimal number from 0 to 255. We can say that 10.161.4.25 is a valid IP address since it contains four decimal...

Using TCP/IP tools for troubleshooting

Some of the following commands can be used to track any TCP/IP errors. The commands can be used to examine whether or not any router is down or any connection is established. It will then help us a lot to decide on the proper solution.

The ipconfig command

We used the ipconfig command earlier to identify the MAC address and the IP address. In addition to this, we can use this command to check the TCP/IP configuration. We can also use this command as explained in the upcoming sections.

Displaying the full configuration information

To display the configuration information completely, we can call the following command on the console:

ipconfig /all

All the configuration information about the network adapter will be displayed for us, such as the network interface card, wireless card, and Ethernet adapter, like we have already tried in The Data Link layer section in this chapter when we looked for MAC Address.

Displaying DNS

The following command will display...

Summary

In this chapter, we came to know the main role of each layer in both the OSI and TCP/IP models when we talked about network architecture. We explored the Internet Protocol and were able to distinguish the difference between IPv4 and IPv6. We were also able to determine the subnet mask and classify the IP address. Moreover, we were able to detect whether an error occurs using various TCP/IP tools.

In the next chapter, we are going to talk about the Boost C++ library, which is the library that will make us more productive in the C++ programming. Now, let's prepare our programming tool and go to the next chapter.

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Description

Boost.Asio is a C++ library used for network programming operations. Organizations use Boost because of its productivity. Use of these high-quality libraries speed up initial development, result in fewer bugs, reduce reinvention-of-the-wheel, and cut long-term maintenance costs. Using Boost libraries gives an organization a head start in adopting new technologies. This book will teach you C++ Network programming using synchronous and asynchronous operations in Boost.Asio with minimum code, along with the fundamentals of Boost, server-client applications, debugging, and more. You will begin by preparing and setting up the required tools to simplify your network programming in C++ with Boost.Asio. Then you will learn about the basic concepts in networking such as IP addressing, TCP/IP protocols, and LAN with its topologies. This will be followed by an overview of the Boost libraries and their usage. Next you will get to know more about Boost.Asio and its concepts related to network programming. We will then go on to create a client-server application, helping you to understand the networking concepts. Moving on, you will discover how to use all the functions inside the Boost.Asio C++ libraries. Lastly, you will understand how to debug the code if there are errors found and will run the code successfully.

Who is this book for?

This book is for C++ Network programmers with basic knowledge of network programming, but no knowledge of how to use Boost.Asio for network programming.

What you will learn

  • Prepare the tools to simplify network programming in C++ using Boost.Asio
  • Explore the networking concepts of IP addressing, TCP/IP ports and protocols, and LAN topologies
  • Get acquainted with the usage of the Boost libraries
  • Get to know more about the content of Boost.Asio network programming and Asynchronous programming
  • Establish communication between client and server by creating clientserver application
  • Understand the various functions inside Boost.Asio C++ libraries to delve into network programming
  • Discover how to debug and run the code successfully
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Length: 200 pages
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Table of Contents

8 Chapters
1. Simplifying Your Network Programming in C++ Chevron down icon Chevron up icon
2. Understanding the Networking Concepts Chevron down icon Chevron up icon
3. Introducing the Boost C++ Libraries Chevron down icon Chevron up icon
4. Getting Started with Boost.Asio Chevron down icon Chevron up icon
5. Delving into the Boost.Asio Library Chevron down icon Chevron up icon
6. Creating a Client-server Application Chevron down icon Chevron up icon
7. Debugging the Code and Solving the Error Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.4
(11 Ratings)
5 star 27.3%
4 star 27.3%
3 star 18.2%
2 star 9.1%
1 star 18.2%
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ELIAS POLITAKIS Oct 04, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
By far one of the best books I have read regarding a specific technological topic. The book is extremely well structured, starting from setting up the compiler, introducing networking principles and structures, moving to building boost libraries and then getting into ASIO with good examples of asynchronous client and server examples. It will give you everything you need to know about ASIO for getting started in less than 24 hours. Highly recommended!!
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Maxim Rozhkov Dec 17, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
The authors clearly explained some important issues, related with network programming by Boost.ASIO, in the book. Particularly, they gave a lot of information about programming tools (MinGW), the OSI model, the concept of multi-threading programming in the Boost and they described an example of a Telnet application (client and server sides). The most impressing part of the book for me is considered the model of multi-threading in the Boost libraries. I found that all insertions about C++ 11 were amazingly useful: smart-pointers, move-semantics, etc. The book will be interesting and useful for everyone who is interested in network programming and development of C++. No one minute that was spent on reading the book was not lost in vain.
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luncliff Apr 23, 2016
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Reference codes are easy
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Hossein Oct 22, 2024
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
The book seems really useful and gives reader enough information to understand how to use boost.asio library properly. The code examples are long and there are too much unnecessary and irrelevant details in them. I tried to rewrite the example codes to only contain the most simple meanings and used as few components as possible, and the boost.asio details became a lot more visible. Using other libraries like shared_ptr, random and thread while we have them in the standard library is not a wise thing to do in a simple book like this that has only one purpose, to teach boost.asio not any other libraries. Critics aside, the book is worth the time needed to read it. Recommend it.
Subscriber review Packt
Andrea Oct 27, 2015
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Already had the 1st edition and since I had found it useful, I decided to upgrade to the 2nd edition.It was a good surprise to find the content is now more polished and a bit better structured.Overall, the book is valuable if you need to quickly start with boost asio and more generally if you need to get a first grasp at the concepts of asynchronous network programming.The foundation of the paradigms is well explained and gives you a jump start in using the library, which I found very useful as I was able to apply the concepts and the techniques in a real application in very short time.The examples are very practical and give you a good starting point upon which you can then improve and customize as you prefer.
Amazon Verified review Amazon
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