Golang CIDR block management module/package.

Inspired by the Python netaddr library:

• https://github.com/drkjam/netaddr/

This is a fork from EvilSuperstars/go-cidrman.

Note: This project uses Go Modules making it safe to work with it outside of your existing GOPATH. The instructions that follow assume a directory in your home directory outside of the standard GOPATH (i.e $HOME/git/GitHub/Netnod/go-cidrman/).

Clone repository to $HOME/git/GitHub/Netnod/go-cidrman/:

$ mkdir -p $HOME/git/GitHub/Netnod/; cd $HOME/git/GitHub/Netnod/
$ git clone git@github.com:Netnod/go-cidrman.git

$ cd $HOME/git/GitHub/Netnod/go-cidrman/
$ make build

$ cd $HOME/git/GitHub/Netnod/go-cidrman/
$ make test

Clean the testcache.

$ cd $HOME/git/GitHub/Netnod/go-cidrman/
$ make clean

A lot of work was done in the ipv6-experimental branch in February and December 2017. In June 2019, some of the metafiles in the master branch were created or updated, without changes to the code itself.

IPv6 merge support was added to the main branch in March 2022. Due to the timeline issue above and the experimental name, some of the code in this fork was written from scratch or manaually copied from the experimental branch. The ipv6-additions branch was created to create a PR in the original project, to merge the IPv6 support.

In April 2022, a merge-experimental branch was temporarily used to merge the old work in ipv6-experimental together with the IPv6 support developed in this fork. With IPv6 support now in main, the ipv6-experimental branch was removed as it's no longer relevant in this fork.

New RemoveCIDRs functions added (in June 2022) to remove/exclude CIDR blocks or IP ranges.

New SubsetCIDRs functions added (in September 2022) to select specific CIDR blocks or IP ranges to keep. A bit like the oposite of RemoveCIDRs, SubsetCIDRs selects what to keep instead of what to remove.

New DiffCIDRs functions are planned to compare two lists of CIDR blocks or IP ranges.