/usr/share/perl5/Regexp/Common/net/CIDR.pm is in libregexp-common-net-cidr-perl 0.02-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | package Regexp::Common::net::CIDR;
use strict;
use warnings;
our $VERSION = '0.02';
use Regexp::Common qw(pattern clean no_defaults);
my $ip_unit = "(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]?[0-9])";
pattern name => [qw(net CIDR IPv4)],
create => "(?k:$ip_unit\\.$ip_unit(?:\\.$ip_unit)?(?:\\.$ip_unit)?)\\/(?k:3[0-2]|[1-2]?[0-9])";
1;
__END__
=head1 NAME
Regexp::Common::net::CIDR -- provide patterns for CIDR blocks.
=head1 SYNOPSIS
use Regexp::Common ();
use Regexp::Common::net::CIDR ();
while (<>) {
/$RE{net}{CIDR}{IPv4}/ and print "Contains a CIDR.\n";
}
=head1 DESCRIPTION
Patterns for CIDR blocks. Now only next IPv4 formats are supported:
xxx.xxx/xx
xxx.xxx.xxx/xx
xxx.xxx.xxx.xxx/xx
With {-keep} stores address in $1 and number of bits in $2.
=head1 INSTALLATION
perl Makefile.PL
make
make install
=head1 CAVEATS
As L<Regexp::Common> doesn't work well with extensions
named C<Regexp::Common::xxx::yyy> you have to load this extension
yourself with C<use> or C<require>.
=head1 AUTHOR
Ruslan U. Zakirov <ruz@bestpractical.com>
=cut
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