NetAddr::IP::UtilPP -- pure Perl functions for NetAddr::IP::Util
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);
NetAddr::IP::UtilPP provides pure Perl functions for NetAddr::IP::Util
$rv = hasbits($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
$rv = isIPv4($bits128);
This function returns true if there are no on bits present in the IPv6 portion of the 128 bit string and false otherwise.
$bitsXn = shiftleft($bits128,$n);
input: 128 bit string variable, number of shifts [optional] returns: bits X n shifts NOTE: input bits are returned if $n is not specified
addconst($ipv6naddr,$signed_32con);
Add a signed constant to a 128 bit string variable.
input: 128 bit IPv6 string, signed 32 bit integer returns: scalar carry array (carry, result)
add128($ipv6naddr1,$ipv6naddr2);
Add two 128 bit string variables.
input: 128 bit string var1, 128 bit string var2 returns: scalar carry array (carry, result)
sub128($ipv6naddr1,$ipv6naddr2);
Subtract two 128 bit string variables.
Note: The carry from this operation is the result of adding the one's complement of ARG2 +1 to the ARG1. It is logically NOT borrow.
i.e. if ARG1 >= ARG2 then carry = 1 or if ARG1 < ARG2 then carry = 0
($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 one's, 128 bit cidr
$ipv6naddr = ipv4to6($netaddr);
Convert an ipv4 network address into an ipv6 network address.
input: 32 bit network address returns: 128 bit network address
$ipv6naddr = mask4to6($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
$ipv6naddr = ipanyto6($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
$ipv6naddr = maskanyto6($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
$netaddr = ipv6to4($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
$bcdtext = bin2bcd($bits128);
Convert a 128 bit binary string into binary coded decimal text digits.
input: 128 bit string variable returns: string of bcd text digits
$bits128 = bcd2bin($bcdtxt);
Convert a bcd text string to 128 bit string variable
input: string of bcd text digits returns: 128 bit string variable
hasbits isIPv4 shiftleft addconst add128 sub128 notcontiguous ipv4to6 mask4to6 ipanyto6 maskanyto6 ipv6to4 bin2bcd bcd2bin comp128 bin2bcdn bcdn2txt bcdn2bin simple_pack
Michael Robinton <michael@bizsystems.com>
Copyright 2006 - 2007, 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.
To install NetAddr::IP, copy and paste the appropriate command in to your terminal.
cpanm
cpanm NetAddr::IP
CPAN shell
perl -MCPAN -e shell install NetAddr::IP
For more information on module installation, please visit the detailed CPAN module installation guide.