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
calcSubnet
calcSubnetCIDR
calcSubnetExt
getNetworkAddr ## 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);
calcSubnet('128.8.9.0');
calcSubnet('10001000.10100001.00010101.00000001');
calcSubnetCIDR('128.9.0.218/24');
calcSubnetCIDR('128.9.0.218/28', '255.255.255.0');
calcSubnetExt('128.0.0.1',4);
calcSubnetExt('10001000.10100001.00010101.00000001',4);
getNetworkAddr('198.23.16.0','255.255.255.240','255.255.255.252');
getNetworkAddr('198.23.16.0','255.255.255.240','255.255.255.252', 1);
getNetworkAddr('10000000.00000001.01010101.10000001',
'11111111.11111111.11111111.11110000',
'11111111.11111111.11111111.11111100',);
getNetworkAddr('10000000.00000001.01010101.10000001',
'11111111.11111111.11111111.11110000',
'11111111.11111111.11111111.11111100', 1);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'); >> 255.0.0.0getAddrClass
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); >> 11111111.11000000.00000000.00000000calcSubnet
calcSubnet(<ip addr in decimal/binary notation>) : returns (no. of subnets, no. of hosts)
calcSubnet('128.90.80.12');
calcSubnet('11000000.00000000.11000000.01011100');
- These always assumes Default Mask in calculation - hence no of subnets returned is always 0calcSubnetCIDR
calcSubnetCIDR(<ip addr in decimal/binary CIDR notation>, [<mask in decimal/binary notation>])
: returns (no. of subnets, no. of hosts)
calcSubnetCIDR('128.87.56.26/28');
calcSubnetCIDR('128.87.56.26/28','255.255.252.0');calcSubnetExt
calcSubnetExt(ip addr in decimal/binary notation>, no. of bits to extend in default mask OR no. of borrowed bits)
: returns (no. of subnets, no. of hosts)
eg.
calcSubnetExt('128.0.0.1',4);
calcSubnetExt('10001000.10100001.00010101.00000001',4);
Expln : no. of borrowed bits is added to the default subnet mask of ip addr to subnet mask
and subnetting is done so :
***************************************************
127.0.40.1 = ip addr
255.0.0.0 = default subnet mask
no. of borrowed bits = 4
=> 255.240.0.0 = extended mask
***************************************************getNetworkAddr
getNetworkAddr(<ip addr in decimal/binary notation>,
<default mask in decimal/binary notation>,
<subnet mask in decimal/binary notation>,
<true flag - if you want broadcast addresses instead of n/w addresses
) : returns network/broadcast addresses of the subnets after subnetting as a list
eg.
getNetworkAddr('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')
getNetworkAddr('198.23.16.0','255.255.255.240','255.255.255.252',1); >> ('198.23.16.3','198.23.16.7','198.23.16.11','198.23.16.15')
getNetworkAddr('10000000.00000001.01010101.10000001',
'11111111.11111111.11111111.11110000',
'11111111.11111111.11111111.11111100',); >> Always returns n/w addresses in dotted decimal irrespective of binary/decimal
address parameter passedCAVEAT
IPv4 only
Validation of IP addresses are done, but because of conversions here and there it may not show the IP address properly in the error message
as passed earlier by the user.Similar Modules
Net::IP, Net::IpAddr etc.SUPPORT
debashish@cpan.orgACKNOWLEDGEMENTS
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.