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 IPC using Unix domain sockets


Unix domain sockets (UDS) are sometimes used as a convenient way to communicate between two processes. As in Unix, everything is conceptually a file. If you need an example of such an IPC action, this can be useful.

How to do it...

We launch a UDS server that binds to a filesystem path, and a UDS client uses the same path to communicate with the server.

Listing 3.9a shows a Unix domain socket server, as follows:

#!/usr/bin/env python 
# Python Network Programming Cookbook, Second Edition -- Chapter - 3 
# This program is optimized for Python 2.7.12 and Python 3.5.2. 
# It may run on any other version with/without modifications. 
 
 
import socket 
import os 
import time 
 
SERVER_PATH = "/tmp/python_unix_socket_server" 
  
def run_unix_domain_socket_server(): 
    if os.path.exists(SERVER_PATH): 
        os.remove( SERVER_PATH ) 
      
    print ("starting unix domain socket server.") 
    server = socket.socket( socket.AF_UNIX, socket.SOCK_DGRAM ) ...