libnet-ip-cmatch-perl/lib/Net/IP/CMatch.pm

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2017-09-15 15:33:38 +02:00
package Net::IP::CMatch;
use 5.006001;
use strict;
use warnings;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(
match_ip
);
our $VERSION = '0.02';
require XSLoader;
XSLoader::load('Net::IP::CMatch', $VERSION);
1;
__END__
=head1 NAME
Net::IP::CMatch - Efficiently match IP addresses against IP ranges with C.
=head1 SYNOPSIS
use Net::IP::CMatch;
my $match = match_ip( $ip_addr, $match_ip1, $match_ip2, ... );
=head1 DESCRIPTION
Net::IP::CMatch is based upon, and does the same thing as Net::IP::Match.
The unconditionally exported subroutine 'match_ip' determines if the
ip to match ( first argument ) matches any of the subsequent ip arguments.
Match arguments may be absolute quads, as '127.0.0.1', or contain
mask bits as '111.245.76.248/29'.
A true return value indicates a match. It was written in C, rather than
a macro, preprocessed
through Perl's source filter mechanism ( as is Net::IP::Match ), so that
the ip arguments could be traditional perl scalars. The C code is
lean and mean ( IMHO ).
=head2 Example in Apache/mod_perl
I use this module in my Apache server's mod_perl DB logging script to
determine if an incoming IP is 'remote' or 'local'. First, I set up
some variables in httpd.conf:
PerlSetvar DBILogger_local_ips '222.234.52.192/29'
PerlAddvar DBILogger_local_ips '111.245.76.248/29'
PerlAddvar DBILogger_local_ips '10.0.0.0/24'
PerlAddvar DBILogger_local_ips '172.16.0.0/12'
PerlAddvar DBILogger_local_ips '192.168.0.0/16'
PerlAddvar DBILogger_local_ips '127.0.0.1'
These are the ip addresses I want to be considered local. In the
mod_perl module:
my @local_ips = $r->dir_config( "DBILogger_local_ips" );
my $local = match_ip( $incoming_ip, @local_ips );
Now $local is just that, and I set the database key accordingly.
=head2 EXPORT
'match_ip', unconditionally.
=head1 SEE ALSO
L<Net::IP::Match> by Marcel GrE<uuml>nauer.
=head1 AUTHOR
Beau E. Cox, E<lt>beaucox@hawaii.rr.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2004 by Beau E. Cox
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.6.1 or,
at your option, any later version of Perl 5 you may have available.
=cut