NAME

Net::IP::Util - Common useful routines like converting decimal address to binary and vice versa, determining address class, determining default mask, subnets and hosts and broadcast addresses for hosts in subnet.

SYNOPSIS

use Net::IP::Util;                       ## subroutines isClassAddrA-E, bin2decIpAddr, dec2binIpAddr
use Net::IP::Util qw/:class/;            ## subroutines isClassAddrA-E, getAddrClass
use Net::IP::Util qw/:convert/;          ## subroutines bin2decIpAddr, dec2binIpAddr 
use Net::IP::Util qw/getAddrMaskDefault 
                     getAddrClass
                     isValidMask
                     extendMaskByBits
                     calcSubnetsNHosts
                     getBroadcastAddr    ## Explicit inclusions

isClassAddrA('127.0.32.45');
isClassAddrA('00001111.11110010.00100100.10000001');

dec2binIpAddr('128.0.0.56');
bin2decIpAddr('10001000.10100001.00010101.00000001');

getAddrMaskDefault('124.45.0.0');
getAddrMaskDefault('10000000.00000001.01010101.10000001');

getAddrClass('124.45.0.0');
getAddrClass('00001111.11110010.00100100.10000001');

isValidMask('255.255.252.0');
isValidMask('11111111.00000000.00000000.00000000');

extendMaskByBits('255.255.0.0',2);
extendMaskByBits('11111111.00000000.00000000.00000000',2);

calcSubnetsNHosts('128.0.0.1',4);
calcSubnetsNHosts('10001000.10100001.00010101.00000001',4);
                         
getBroadcastAddr('198.23.16.0','255.255.255.240','255.255.255.252');
getBroadcastAddr('10000000.00000001.01010101.10000001',
                 '11111111.11111111.11111111.11110000',
                 '11111111.11111111.11111111.11111100',);

ABSTRACT

This module tries provide the basic functionalities related to IPv4 addresses.
Address class, subnet masks, subnet addresses, broadcast addresses can be deduced
using the given methods. Ip addresses passed are also validated implicitly.

Provision has been given to specify IP addresses in either dotted decimal notation
or dotted binary notation, methods have been provided for conversion to-from these
to notations which are internally used by other methods too.

METHODS

isClassAddrA,isClassAddrB,isClassAddrC,isClassAddrD,isClassAddrE

isClassAddrA(<addr in decimal/binary>) : returns 1 if true
eg.
isClassAddrA('127.0.32.45');
isClassAddrA('00001111.11110010.00100100.10000001');

dec2binIpAddr

dec2binIpAddr(<ip addr in dotted decimal notation>) : returns ip in binary dotted notation
eg.
dec2binIpAddr('128.0.0.56');

bin2decIpAddr

bin2decIpAddr(<ip addr in dotted binary notation>) : returns ip in decimal dotted notation
eg.
bin2decIpAddr('10001000.10100001.00010101.00000001');

getAddrMaskDefault

getAddrMaskDefault(<ip addr in decimal/binary notation>) : returns default subnet mask in dotted decimal notation
eg.
getAddrMaskDefault('124.45.0.0'); >> 255.0.0.0
getAddrMaskDefault('10000000.00000001.01010101.10000001'); >> 255.0.0.0

getAddrClass

getAddrClass(<ip addr in decimal/binary notation>) : returns class (A/B/C/D/E) of ip address
eg.  
getAddrClass('124.45.0.0');
getAddrClass('00001111.11110010.00100100.10000001');

isValidMask

isValidMask(<ip addr in decimal/binary notation>) : returns 1 if valid mask
eg.
isValidMask('255.255.252.0');
isValidMask('11111111.00000000.00000000.00000000');

extendMaskByBits

extendMaskByBits(<ip addr in decimal/binary notation>,<no.of bits to extend>)
  : returns mask after extending/turning on given no. of bits after the already on bits of the mask
eg.
extendMaskByBits('255.255.0.0',2); >> 255.255.192.0
extendMaskByBits('11111111.00000000.00000000.00000000',2); >> 11111111.11000000.00000000.00000000

calcSubnetsNHosts

calcSubnetsNHosts(ip addr in decimal/binary notation>,no. of borrowed bits)
  : returns (no. of subnets, no. of hosts)
eg.
calcSubnetsNHosts('128.0.0.1',4);
calcSubnetsNHosts('10001000.10100001.00010101.00000001',4);

getBroadcastAddr

getBroadcastAddr(<ip addr in decimal/binary notation>,
                 <default mask in decimal/binary notation>,
                 <subnet mask in decimal/binary notation>,
                 ) : returns broadcast addresses after subnetting as a list
eg.
getBroadcastAddr('198.23.16.0','255.255.255.240','255.255.255.252'); >> ('198.23.16.0','198.23.16.4','198.23.16.8','198.23.16.12')
getBroadcastAddr('10000000.00000001.01010101.10000001',
                 '11111111.11111111.11111111.11110000',
                 '11111111.11111111.11111111.11111100',);

CAVEAT

IPv4 only

Similar Modules

Net::IP, Net::IpAddr etc.

SUPPORT

debashish@cpan.org

ACKNOWLEDGEMENTS

COPYRIGHT & LICENSE

Copyright 2013 Debashish Parasar, all rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

cpanm Net::IP::Util

perl -MCPAN -e shell
install Net::IP::Util