| NetAddr::IP::UtilPP(3) | User Contributed Perl Documentation | NetAddr::IP::UtilPP(3) |
NAME¶
NetAddr::IP::UtilPP -- pure Perl functions for NetAddr::IP::Util
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¶
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,$ipv6naddr2);
Subtract two 128 bit string variables.
input: 128 bit string var1, 128 bit string var2 returns: scalar carry array (carry, result)Note: The carry from this operation is the result of adding the one's complement of ARG2 +1 to the ARG1. It is logically NOT borrow.
i.e. if ARG1 >= ARG2 then carry = 1 or if ARG1 < ARG2 then carry = 0 - ($spurious,$cidr) = notcontiguous($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 addressNOTE: 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
EXPORT_OK¶
hasbits
isIPv4
shiftleft
addconst
add128
sub128
notcontiguous
ipv4to6
mask4to6
ipanyto6
maskanyto6
ipv6to4
bin2bcd
bcd2bin
comp128
bin2bcdn
bcdn2txt
bcdn2bin
simple_pack
threads
AUTHOR¶
Michael Robinton <michael@bizsystems.com>
COPYRIGHT¶
Copyright 2006 - 2008, 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>
| 2008-12-09 | perl v5.10.1 |