The hath package

[Tags:agpl, program]

Hath is a Haskell program for working with network blocks in CIDR notation. When dealing with blocks of network addresses, there are a few things that one usually wants to do with them:

Hath has several modes to perform these functions:

This computes a (Perl-compatible) regular expression matching the input CIDR blocks. It's the default mode of operation.
This combines small blocks into larger ones where possible, and eliminates redundant blocks. The output should be equivalent to the input, though.
Shows only the blocks that would be removed by reduce; that is, it shows the ones that would get combined into larger blocks or are simply redundant.
Shows what would change if you used reduce. Uses diff-like notation.
List the IP addresses contained within the given CIDRs.
Perform reverse DNS (PTR) lookups on the IP addresses contained within the given CIDRs.


Combine two /24s into a /23:

$ hath reduced <<< ""

Create a perl-compatible regex to be fed to grep:

$ grep -P `hath regexed -i cidrs.txt` mail.log

List the addresses in

$ hath listed <<< ""

Perform PTR lookups on all of

hath reversed <<< ""


Versions 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.1.0, 0.1.1, 0.1.2, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.3.0
Dependencies base (==4.6.*), bytestring (==0.10.*), dns (==0.3.*), HUnit (==1.2.*), MissingH (==1.2.*), parallel-io (==0.3.*), QuickCheck (==2.6.*), split (==0.2.*), test-framework (==0.8.*), test-framework-hunit (==0.3.*), test-framework-quickcheck2 (==0.3.*) [details]
License GPL-3
Author Michael Orlitzky
Maintainer Michael Orlitzky <>
Stability Unknown
Category Utils
Source repository head: git clone -b master
Uploaded Mon Aug 19 22:15:27 UTC 2013 by MichaelOrlitzky
Distributions NixOS:0.3.0
Downloads 2179 total (36 in the last 30 days)
1 []
Status Docs not available [build log]
All reported builds failed as of 2015-11-20 [all 5 reports]


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