I wrote this script in an hour or two, sorry if it's confusing or unsightly. Basically it will take a list of IP ranges (sample in __DATA__) and produce procmail recipes to match the ranges. I couldn't use Regexp::List, which will optimize a list into a single regular expression, because it produces Perl regular expressions which procmail doesn't understand. I tried to work around that but finally gave up and wrote a limited optimizer that does numeric range for IPs and is not very good. It works OK for me, but I would like to know if anyone has comments on the correctness, or wants to suggest improvements.
Background: a user wanted a way to produce IP regexes for procmail directly from a text list of ranges. I wrote the script (without -procmail it just checks the IP) but the user wanted procmail regexes only. Procmail regexes are pretty basic so I thought it was an interesting problem; of course it would have been much easier if regex matching on numbers could be done in base 16 :) Thanks Ted
checkip.pl
Description: Perl program
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