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The prefix length (number after the '/') tells you how many bits make up the network part of the address which is the only part you should be matching. Here you're just matching the first 3 octets which assumes everything is a '/24'. en.wikipedia.org/wiki/CIDR_notation

eater
– eater

2010-12-16 15:58:53 +00:00
Commented Dec 16, 2010 at 15:58
Although I strongly advise using a netmask module that abstracts away the bits, for those bound and determined to use a regex (which just out of sheer cussedness I sometimes myself am :), this seems like a great place to use a “grammatical” regex, with a ((DEFINE)…) block and “regex subroutines”.

tchrist
– tchrist

2010-12-16 18:19:29 +00:00
Commented Dec 16, 2010 at 18:19
1

This re-invents the wheel - just use Regexp::Common::net.

Ether
– Ether

2010-12-16 18:39:24 +00:00
Commented Dec 16, 2010 at 18:39
@tchrist: Agree. @Ether: Whoops. I think it's just all my years of CPAN-less Perl environment that makes me code first.

Axeman
– Axeman

2010-12-16 19:05:23 +00:00
Commented Dec 16, 2010 at 19:05

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