Writing a new NSE library in Lua

There are times when you will realize that the code you are writing could be put into a library to be reused by other NSE scripts. The process of writing an NSE library is straightforward, and there are only certain things that we need to consider, such as not accessing global variables used by other scripts.

This recipe will teach you how to create your own Lua NSE library.

How to do it...

Creating a library has a similar process to writing scripts. Always consider the scope of the variables that you are working with. Let's begin by creating an NSE library in Lua:

1. Create a new file mylibrary.lua, and declare the required libraries you need and set the _ENV upvalue:

   local math = require "math" 
   _ENV = stdnse...