Whatmask
Whatmask is a command-line tool originally written by Jim Laffey (http://www.laffeycomputer.com/whatmask.html) and released with a GPL license. This is a ruby rewrite of whatmask, providing the same functionality of the original utility (will maybe add more).
Installation
gem install whatmask
Instructions
Once installed, you should have a command-line tool available in your console.
whatmask
Without any parameters, the command will output the following help instructions:
whatmask may be used two ways:
Given a mask: whatmask <CIDR bits>
- or - whatmask <subnet mask>
- or - whatmask <hex subnet mask>
- or - whatmask <wildcard bit mask>
NOTE: whatmask will autodetect the input and show you all four.
Given an ip/mask: whatmask <IP address>/<netmask>
<netmask> may be one of the following:
CIDR notation (e.g. "24")
Netmask notation (e.g. "255.255.255.0")
Hex Netmask notation (e.g. "0xffffff00")
Wildcard bits notation (e.g. "0.0.0.255")
NOTE: whatmask will autodetect the netmask format.
###To Do
Add better error checking for inputs. Add some autofill or next available type functions.