/ 
Net-CIDR-Overlap-0.0.1
River stage zero No dependents
/ Net::CIDR::Overlap

NAME

Net::CIDR::Overlap - A utility module for helping make sure a list of CIDRs don't overlap.

VERSION

Version 0.0.1

SYNOPSIS

my $nco=Net::CIDR::Overlap->new;

# add some subnets
eval{
    $nco->add( '127.0.0.0/24' );
    $nco->add( '192.168.42.0/24' );
    $nco->add( '10.10.0.0/16' );
}
if ( $@ ){
    warn( $@ );
}

# this will fail as they have already been added
eval{
    $nco->add( '127.0.0.0/25' );
    $nco->add( '10.10.10/24' );
}
if ( $@ ){
    warn( $@ );
}

# this will fail this is not a valid CIDR
eval{
    $nco->add( 'foo' );
}
if ( $@ ){
    warn( $@ );
}

# print the subnets we added with out issue
my $list=$nco->list;
foreach my $cidr ( @${ $list } ){
    print $cidr."\n";
}

METHODS

new

This initates the object.

No arguments are taken.

This will always succeeed.

my $nco=Net::CIDR::Overlap->new;

add

This adds a subnet to the set being checked.

Net::CIDR::cidrvalidate is used to validate passed CIDR/IP.

This will die if it is called with a undef value of if validation fails.

This does not check if what is being added overlaps with anything already added.

eval{
    $nco->add( $cidr );
}
if ( $@ ){
    warn( $@ );
}

compare_and_add

This first checks for overlap and then adds it.

There is one required argument and two optional.

The first and required is the CIDR/IP. This will be validated using Net::CIDR::cidrvalidate.

The second is if to invert the check or not. If set to true, it will only be added if overlap is found.

The third is if overlap should be any or all. This is boolean and a value of true sets it to all. The default value is false, meaning any overlap.

# just add it if there is no overlap
eval{
    $nco->compare_and_add( $cidr );
}
if ( $@ ){
    warn( $@ );
}

# this time invert it and use use any for the overlap check
eval{
    $nco->add( $cidr, '1', '0' );
}
if ( $@ ){
    warn( $@ );
}

list

This returns a array ref of successfully added items.

my $list=$nco->list;
foreach my $cidr ( @${ $list } ){
    print $cidr."\n";
}

AUTHOR

Zane C. Bowers-Hadley, <vvelox at vvelox.net>

BUGS

Please report any bugs or feature requests to bug-net-cidr-overlap at rt.cpan.org, or through the web interface at https://rt.cpan.org/NoAuth/ReportBug.html?Queue=Net-CIDR-Overlap. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc Net::CIDR::Overlap

You can also look for information at:

ACKNOWLEDGEMENTS

LICENSE AND COPYRIGHT

This software is Copyright (c) 2019 by Zane C. Bowers-Hadley.

This is free software, licensed under:

The Artistic License 2.0 (GPL Compatible)