CIDR string replacement

Fri Oct 2 16:08:15 UTC 2020

This is what I have done using R:

https://github.com/meekj/netblockr

I still use similar tools in Perl with Net::Netmask

Jon

On Fri, Oct 2, 2020 at 11:50 AM Royce Williams <royce at techsolvency.com>
wrote:

> The recent thread on CIDR aggregation cleanup scripts reminds me that I'm
> looking for a similarly efficient implementation of a related tool. (I'm
> gearing up to write my own in Perl, but don't want to reinvent the wheel.)
>
> I'd like a fast, Unix-pipeline-ready tool that *replaces* all IPs within
> that range with a supplied string, using a simple config file as input, and
> ideally with autodetection of IP-address "word" boundaries, as in:
>
> $ cat cidr-replace.cfg
> 105.170.75.0/24|[Unitel] <http://105.170.75.0/24%7C%5BUnitel%5D>
> 209.112.128.0/18|[ACS] <http://209.112.128.0/18%7C%5BACS%5D>
> 209.165.128.0/18|[GCI] <http://209.165.128.0/18%7C%5BGCI%5D>
> 192.0.2.0/24|[TEST-NET-1] <http://192.0.2.0/24%7C%5BTEST-NET-1%5D>
> 198.51.100.0/24|[TEST-NET-2] <http://198.51.100.0/24%7C%5BTEST-NET-2%5D>
> 203.0.113.0/24|[TEST-NET-3] <http://203.0.113.0/24%7C%5BTEST-NET-3%5D>
>
> $ echo "source,data1,data2,209.112.130.2,data3" | cidr-replace
> cidr-replace.cfg
> source,data1,data2,[ACS],data3
>
>
> And I know this is kludgy, but it would also be useful for quick-and-dirty
> work if it had a flag to "append" the string using a known delimiter, as in:
>
> $ echo "source,data1,data2,209.112.130.2,data3" | cidr-replace --append
> ',' cidr-replace.cfg
> source,data1,data2,209.112.130.2,[ACS],data3
>
> (But I'm happy to hack that last functionality into an existing script.)
>
> --
> Royce
>
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