GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  NETADDR::IP::UTILPP (3)

.ds Aq ’

NAME

NetAddr::IP::UtilPP -- pure Perl functions for NetAddr::IP::Util

CONTENTS

SYNOPSIS



  use NetAddr::IP::UtilPP qw(
        hasbits
        isIPv4
        shiftleft
        addconst
        add128
        sub128
        notcontiguous
        ipv4to6
        mask4to6
        ipanyto6
        maskanyto6
        ipv6to4
        bin2bcd
        bcd2bin
  );

  use NetAddr::IP::UtilPP qw(:all)

  $rv = hasbits($bits128);
  $rv = isIPv4($bits128);
  $bitsX2 = shiftleft($bits128,$n);
  $carry = addconst($ipv6naddr,$signed_32con);
  ($carry,$ipv6naddr)=addconst($ipv6naddr,$signed_32con);
  $carry = add128($ipv6naddr1,$ipv6naddr2);
  ($carry,$ipv6naddr)=add128($ipv6naddr1,$ipv6naddr2);
  $carry = sub128($ipv6naddr1,$ipv6naddr2);
  ($spurious,$cidr) = notcontiguous($mask128);
  ($carry,$ipv6naddr)=sub128($ipv6naddr1,$ipv6naddr2);
  $ipv6naddr = ipv4to6($netaddr);
  $ipv6naddr = mask4to6($netaddr);
  $ipv6naddr = ipanyto6($netaddr);
  $ipv6naddr = maskanyto6($netaddr);
  $netaddr = ipv6to4($pv6naddr);
  $bcdtext = bin2bcd($bits128);
  $bits128 = bcd2bin($bcdtxt);



DESCRIPTION

<B>NetAddr::IP::UtilPPB> provides pure Perl functions for <B>NetAddr::IP::UtilB>
o $rv = hasbits($bits128);

This function returns true if there are one’s present in the 128 bit string and false if all the bits are zero.



  i.e.  if (hasbits($bits128)) {
          &do_something;
        }

  or    if (hasbits($bits128 & $mask128) {
          &do_something;
        }



This allows the implementation of logical functions of the form of:



        if ($bits128 & $mask128) {
            ...

  input:        128 bit IPv6 string
  returns:      true if any bits are present



o $rv = isIPv4($bits128);

This function returns true if there are no on bits present in the IPv6 portion of the 128 bit string and false otherwise.

o $bitsXn = shiftleft($bits128,$n);



  input:        128 bit string variable,
                number of shifts [optional]
  returns:      bits X n shifts

  NOTE: a single shift is performed
        if $n is not specified



o addconst($ipv6naddr,$signed_32con);

Add a signed constant to a 128 bit string variable.



  input:        128 bit IPv6 string,
                signed 32 bit integer
  returns:  scalar      carry
            array       (carry, result)



o add128($ipv6naddr1,$ipv6naddr2);

Add two 128 bit string variables.



  input:        128 bit string var1,
                128 bit string var2
  returns:  scalar      carry
            array       (carry, result)



o sub128($ipv6naddr1,$ipv6naddr2);

Subtract two 128 bit string variables.



  input:        128 bit string var1,
                128 bit string var2
  returns:  scalar      carry
            array       (carry, result)



Note: The carry from this operation is the result of adding the one’s complement of ARG2 +1 to the ARG1. It is logically <B>NOT borrowB>.



        i.e.    if ARG1 >= ARG2 then carry = 1
        or      if ARG1  < ARG2 then carry = 0



o ($cidr,$spurious) = notcontiguous($mask128);

This function counts the bit positions remaining in the mask when the rightmost ’0’s are removed.



        input:  128 bit netmask
        returns true if there are spurious
                    zero bits remaining in the
                    mask, false if the mask is
                    contiguous ones,
                128 bit cidr



o $ipv6naddr = ipv4to6($netaddr);

Convert an ipv4 network address into an ipv6 network address.



  input:        32 bit network address
  returns:      128 bit network address



o $ipv6naddr = mask4to6($netaddr);

Convert an ipv4 netowrk address into an ipv6 network mask.



  input:        32 bit network/mask address
  returns:      128 bit network/mask address



NOTE: returns the high 96 bits as one’s

o $ipv6naddr = ipanyto6($netaddr);

Similar to ipv4to6 except that this function takes either an IPv4 or IPv6 input and always returns a 128 bit IPv6 network address.



  input:        32 or 128 bit network address
  returns:      128 bit network address



o $ipv6naddr = maskanyto6($netaddr);

Similar to mask4to6 except that this function takes either an IPv4 or IPv6 netmask and always returns a 128 bit IPv6 netmask.



  input:        32 or 128 bit network mask
  returns:      128 bit network mask



o $netaddr = ipv6to4($pv6naddr);

Truncate the upper 96 bits of a 128 bit address and return the lower 32 bits. Returns an IPv4 address as returned by inet_aton.



  input:        128 bit network address
  returns:      32 bit inet_aton network address



o $bcdtext = bin2bcd($bits128);

Convert a 128 bit binary string into binary coded decimal text digits.



  input:        128 bit string variable
  returns:      string of bcd text digits



o $bits128 = bcd2bin($bcdtxt);

Convert a bcd text string to 128 bit string variable



  input:        string of bcd text digits
  returns:      128 bit string variable



EXPORT_OK



        hasbits
        isIPv4
        shiftleft
        addconst
        add128
        sub128
        notcontiguous
        ipv4to6
        mask4to6
        ipanyto6
        maskanyto6
        ipv6to4
        bin2bcd
        bcd2bin
        comp128
        bin2bcdn
        bcdn2txt
        bcdn2bin
        simple_pack



AUTHOR

Michael Robinton <michael@bizsystems.com>

COPYRIGHT

Copyright 2006, Michael Robinton <michael@bizsystems.com>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License (except as noted otherwise in individuals sub modules) published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

AUTHOR

Michael Robinton <michael@bizsystems.com>
Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 NETADDR::IP::UTILPP (3) 2006-06-13

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.