NAME¶
Paranoid::Network::IPv4 - IPv4-related functions
VERSION¶
$Id: IPv4.pm,v 0.1 2012/05/29 21:37:44 acorliss Exp $
SYNOPSIS¶
use Paranoid::Network::IPv4;
@net = ipv4NetConvert($netAddr);
$rv = ipv4NetIntersect($net1, $net2);
or
use Paranoid::Network::IPv4 qw(:all);
print "Valid IP address\n" if $netAddr =~ /^@{[ IPV4REGEX ]}$/;
@net = ipv4NetConvert($netAddr);
$broadcast = $net[IPV4BRDCST];
DESCRIPTION¶
This module contains a few convenience functions for working with IPv4
addresses.
By default only the subroutines themselves are imported. Requesting
:all
will also import the constants as well.
SUBROUTINES/METHODS¶
ipv4NetConvert¶
@net = ipv4NetConvert($netAddr);
This function takes an IPv4 network address in string format and converts it
into an array containing the base network address, the broadcast address, and
the netmask, in integer format. The network address can have the netmask in
either CIDR format or dotted quads.
In the case of a single IP address, the array with only have one element, that
of the IP in integer format.
Passing any argument to this function that is not a string representation of an
IP address (including undef values) will cause this function to return an
empty array.
ipv4NetIntersect¶
$rv = ipv4NetIntersect($net1, $net2);
This function tests whether an IP or subnet intersects with another IP or
subnet. The return value is essentially boolean, but the true value can vary
to indicate which is a subset of the other:
-1: destination range encompasses target range
0: both ranges do not intersect at all
1: target range encompasses destination range
The function handles the same string formats as
ipv4NetConvert, but will
allow you to test single IPs in integer format as well.
CONSTANTS¶
These are only imported if explicity requested or with the
:all tag.
MAXIPV4CIDR¶
Simply put: 32. This is the largest CIDR notation supported in IPv4.
IPV4REGEX¶
Regular expression:
qr/(?:\d{1,3}\.){3}\d{1,3}/sm
You can use this for validating IP addresses as such:
$ip =~ m#^@{[ IPV4REGEX ]}$#;
or to extract potential IPs from extraneous text:
(@ips) = ( $string =~ m#(@{[ IPV4REGEX ]})#gsm);
IPV4CIDRRGX¶
Regular expression:
qr#(@{[ IPV4REGEX ]})(?:/(\d+|@{[ IPV4REGEX ]}))?#sm
By default this will extract an IP or CIDR notation network address:
($net, $mask) = ( $ip =~ m#^@{[ IPV4CIDRRGX ]}$# );
In the case of a simple IP address
$mask will be undefined.
IPV4BASE¶
This is the ordinal index of the base network address as returned by
ipv4NetConvert.
IPV4BRDCST¶
This is the ordinal index of the broadcast address as returned by
ipv4NetConvert.
IPV4MASK¶
This is the ordinal index of the network mask as returned by
ipv4NetConvert.
DEPENDENCIES¶
- o
- Paranoid
- o
- Paranoid::Network::Socket
BUGS AND LIMITATIONS¶
AUTHOR¶
Arthur Corliss (corliss@digitalmages.com)
LICENSE AND COPYRIGHT¶
This software is licensed under the same terms as Perl, itself. Please see
http://dev.perl.org/licenses/ for more information.
(c) 2012, Arthur Corliss (corliss@digitalmages.com)