Net-IP-Util version 1.02
========================

The README is used to introduce the module and provide instructions on
how to install the module, any machine dependencies it may have (for
example C compilers and installed libraries) and any other information
that should be provided before the module is installed.

A README file is required for CPAN modules since CPAN extracts the
README file from a module distribution so that people browsing the
archive can use it get an idea of the modules uses. It is usually a
good idea to provide version information here so that people can
decide whether fixes for the module are worth downloading.

INSTALLATION

To install this module type the following:

   perl Makefile.PL
   make
   make test
   make install

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.