Testing if a IP is valid

[ComputerTech]

So i am trying to find a code that will check if a IP has the correct syntax of a IPv4 or IPv6 IP, i have no idea how that would look, but all help is much appreciated

[CrazyCat]

Hum, did you look @ https://regex101.com/library?orderBy=RE ... &search=IP ?

[caesar]

Here's a better link with Regular Expression Examples.

If you don't want to fiddle with regexp and basically reinvent the wheel, then use the ip package that comes with TCLlib that offers some tools to validate ipv4 or ipv6, like:

Code: Select all

% package require ip
1.4
::ip::version 192.168.0.1
1
% ::ip::version 192.168.0.256
-1
% ::ip::is ipv4 192.168.0.1
1
% ::ip::version 192.198.0.256
-1
% ::ip::version 2001:bc8:32d7:26c::
6

You can find the source code of a previous version here (or if you are on Debian you should find it in /usr/share/tcltk/tcllib1.20/dns/ip.tcl, if not do a locate ip.tcl) to see what other commands are available.

[ComputerTech]

Awesome! Thanks very much caesar

And thanks CrazyCat for the link you provided as well