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
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
This function returns true if there are no on bits present in the IPv6 portion of the 128 bit string and false otherwise.
input: 128 bit string variable, number of shifts [optional] returns: bits X n shifts NOTE: input bits are returned if $n is not specified
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)
Add two 128 bit string variables.
input: 128 bit string var1, 128 bit string var2 returns: scalar carry array (carry, result)
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
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
Convert an ipv4 network address into an ipv6 network address.
input: 32 bit network address returns: 128 bit network address
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
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
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
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
Convert a 128 bit binary string into binary coded decimal text digits.
input: 128 bit string variable returns: string of bcd text digits
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.
Michael Robinton <michael@bizsystems.com>