Book Image

Python Network Programming

By : Abhishek Ratan, Eric Chou, Pradeeban Kathiravelu, Dr. M. O. Faruque Sarker
Book Image

Python Network Programming

By: Abhishek Ratan, Eric Chou, Pradeeban Kathiravelu, Dr. M. O. Faruque Sarker

Overview of this book

This Learning Path highlights major aspects of Python network programming such as writing simple networking clients, creating and deploying SDN and NFV systems, and extending your network with Mininet. You’ll also learn how to automate legacy and the latest network devices. As you progress through the chapters, you’ll use Python for DevOps and open source tools to test, secure, and analyze your network. Toward the end, you'll develop client-side applications, such as web API clients, email clients, SSH, and FTP, using socket programming. By the end of this Learning Path, you will have learned how to analyze a network's security vulnerabilities using advanced network packet capture and analysis techniques. This Learning Path includes content from the following Packt products: • Practical Network Automation by Abhishek Ratan • Mastering Python Networking by Eric Chou • Python Network Programming Cookbook, Second Edition by Pradeeban Kathiravelu, Dr. M. O. Faruque Sarker
Table of Contents (30 chapters)
Title Page
Copyright
About Packt
Contributors
Preface
Index

Performing a basic IPC using connected sockets (socketpair)


Sometimes, two scripts need to communicate some information between themselves via two processes. In Unix/Linux, there's a concept of connected socket, of socketpair. We can experiment with this here.

Getting ready

This recipe is designed for a Unix/Linux host. Windows/macOS is not suitable for running this one.

How to do it...

We use a test_socketpair() function to wrap a few lines that test the socket's socketpair() function.

 

 

List 3.8 shows an example of socketpair, as follows:

#!/usr/bin/env python 
# Python Network Programming Cookbook, Second Edition -- Chapter - 3 
# This program is optimized for Python 3.5.2. 
# It may run on any other version with/without modifications. 
# To make it run on Python 2.7.x, needs some changes due to API differences. 
# Follow the comments inline to make the program work with Python 2. 
 
import socket 
import os 
 
BUFSIZE = 1024 
 
def test_socketpair(): 
    """ Test Unix socketpair""" 
    parent...