Question

I’m updating an old Perl script to Ruby and having a problem with finding a replacement for one Perl library.

In the Perl script we use Net::CIDR::Lite, which takes a start and end ip address range and outputs a CIDR string.

This is a Perl example that shows the functionality:

#!/usr/bin/perl

use Net::CIDR::Lite;
$cidrblocks = Net::CIDR::Lite->new;
$cidrblocks->add_range("109.152.0.0-109.152.7.255");

$coveragezone = "";

@cidrlist = $cidrblocks->list();

$cidrcount=0;
    while ( defined $cidrlist[$cidrcount] ) {
            $coveragezone .= "$cidrlist[$cidrcount]";
    }
    continue {
            $cidrcount++;
    }

print "$coveragezone";

This script returns a string:

=> 109.152.0.0/21

Does anyone know of a Ruby lib or gem I could use to duplicate the functionality of the add_range call?

$cidrblocks = Net::CIDR::Lite->new;
$cidrblocks->add_range("109.152.0.0-109.152.7.255");

Answer 1

I found a ruby module which does this translation see

http://wejn.org/stuff/cidr.rb.html

have included it in my rails app and it’s perfect