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

Retrieving a remote machine's IP address


Sometimes, you need to translate a machine's hostname into its corresponding IP address, for example, a quick domain name lookup. This recipe introduces a simple function to do that.

How to do it...

If you need to know the IP address of a remote machine, you can use a built-in library function, gethostbyname(). In this case, you need to pass the remote hostname as its parameter.

In this case, we need to call the gethostbyname() class function. Let's have a look at this short code snippet.

Listing 1.2 shows how to get a remote machine's IP address as follows:

    #!/usr/bin/env python
    # 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
    
    def get_remote_machine_info():
        remote_host = 'www.python.org'
        try:
            print ("IP address of %s: %s" %(remote_host, 
            socket.gethostbyname(remote_host)))
...