packet NSE libraries must be mentioned now because they support methods that are useful when manipulating raw packets and generally when working with network I/O operations. In this section, we will learn about binary data strings, handy conversions supported by the libraries, and raw packet and frame generation.
Once you start working with network I/O operations, you'll quickly realize the need to encode binary data strings correctly. NSE has the
bin library (http://nmap.org/nsedoc/lib/bin.html) that helps us pack and unpack formatted binary data strings. This library contains only the
unpack() methods. We will learn how flexible and useful they are.
The following ...