silverstripeltd/submuncher

Tool for consolidating subnets

Submuncher

Tool for shortening CIDRs lists., _(*1)

Inspired by @andrewandante https://github.com/andrewandante/submuncher., _(*2)

Promises

The tool promises the list will be shortened to desired maximum size. It also promises all input addresses will be included within the output CIDRs., _(*3)

It does not guarantee output list will not have ("leak") non-input IPs. In other words, it consolidates the list by merging CIDRs and making them bigger., _(*4)

Algorithm aims to minimise the leak size., _(*5)

Example

$longList = ['1.1.1.0', '1.1.1.1', '1.1.1.2'];
$subMuncher = new SubMuncher();
$shortList = $subMuncher->consolidate($longList, 1);
// $shortList is ['1.1.1.0/30']
echo $subMuncher->getLeakTotal();
// Outputs "1" - 1.1.1.3 was leaked.