- .
- * Find their associated PTR records.
- .
- 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/:
- .
- Compute a (Perl-compatible) regular expression matching
- the input CIDR blocks. It's the default mode of operation.
- .
- @
- $ echo \"10.0.0.0\/29 10.0.0.8\/29\" | hath
- ((10)\.(0)\.(0)\.(15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0))
- @
- .
- Combine two \/24s into a \/23:
- .
- @
- $ echo \"10.0.0.0\/24 10.0.1.0\/24\" | hath reduced
- 10.0.0.0/23
- @
- .
- List the addresses in 192.168.0.240\/29:
- .
- @
- $ echo 192.168.0.240\/29 | hath listed
- 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:
- .
- @
- $ echo 198.41.0.4\/30 | hath reversed
- 198.41.0.4: a.root-servers.net.
- 198.41.0.5:
- 198.41.0.6: rs.internic.net.
- 198.41.0.7:
- @
- .
- The DNS lookups are usually the bottleneck for this mode, but we can
- perform them in parallel. Simply pass the number of threads to the
- GHC runtime on the command line; for example, the following will
- perform 25 lookups in parallel:
- .
- @
- $ echo 198.41.0.4\/24 | hath reversed +RTS -N25
- 198.41.0.4: a.root-servers.net.
- 198.41.0.5:
- 198.41.0.6: rs.internic.net.
- ...
- @
- .
- The command-line syntax and complete set of options are documented in
- the man page.