- .
- Hath has several modes to perform these functions:
- .
- [@Regexed@]
- This computes a (Perl-compatible) regular expression matching
- the input CIDR blocks. It's the default mode of operation.
- .
- [@Reduced@]
- This combines small blocks into larger ones where possible, and
- eliminates redundant blocks. The output should be equivalent to
- the input, though.
- .
- [@Duped@]
- 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.
- .
- [@Diffed@]
- Shows what would change if you used reduce. Uses diff-like
- notation.
- .
- [@Listed@]
- List the IP addresses contained within the given CIDRs.
- .
- [@Reversed@]
- Perform reverse DNS (PTR) lookups on the IP addresses contained
- within the given CIDRs.
- .
- /Examples/:
- .
- Combine two \/24s into a \/23:
- .
- @
- $ hath reduced <<< \"10.0.0.0\/24 10.0.1.0\/24\"
- 10.0.0.0/23
- @
- .
- Create a perl-compatible regex to be fed to grep:
- .
- @
- $ grep -P `hath regexed -i cidrs.txt` mail.log
- @
- .
- List the addresses in 192.168.0.240\/29:
- .
- @
- $ hath listed <<< \"192.168.0.240\/29\"
- 192.168.0.240
- 192.168.0.241
- 192.168.0.242
- 192.168.0.243
- 192.168.0.244
- 192.168.0.245
- 192.168.0.246
- 192.168.0.247
- @
- .
- Perform PTR lookups on all of 198.41.0.4\/30:
- .
- @
- hath reversed <<< \"198.41.0.4\/30\"
- 198.41.0.4: a.root-servers.net.
- 198.41.0.5:
- 198.41.0.6: rs.internic.net.
- 198.41.0.7:
- @