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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" NetAddr::IP::UtilPP \-\- pure Perl functions for NetAddr::IP::Util .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 10 \& use NetAddr::IP::UtilPP qw( \& hasbits \& shiftleft \& addconst \& add128 \& sub128 \& notcontiguous \& ipv4to6 \& mask4to6 \& ipanyto6 \& maskanyto6 \& ipv6to4 \& bin2bcd \& bcd2bin \& ); \& \& use NetAddr::IP::UtilPP qw(:all) \& \& $rv = hasbits($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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBNetAddr::IP::UtilPP\fR provides pure Perl functions for \fBNetAddr::IP::Util\fR .IP "\(bu" 4 \&\f(CW$rv\fR = hasbits($bits128); .Sp This function returns true if there are one's present in the 128 bit string and false if all the bits are zero. .Sp .Vb 3 \& i.e. if (hasbits($bits128)) { \& &do_something; \& } \& \& or if (hasbits($bits128 & $mask128) { \& &do_something; \& } .Ve .Sp This allows the implementation of logical functions of the form of: .Sp .Vb 2 \& if ($bits128 & $mask128) { \& ... \& \& input: 128 bit IPv6 string \& returns: true if any bits are present .Ve .IP "\(bu" 4 \&\f(CW$bitsXn\fR = shiftleft($bits128,$n); .Sp .Vb 3 \& input: 128 bit string variable, \& number of shifts [optional] \& returns: bits X n shifts \& \& NOTE: input bits are returned \& if $n is not specified .Ve .IP "\(bu" 4 addconst($ipv6naddr,$signed_32con); .Sp Add a signed constant to a 128 bit string variable. .Sp .Vb 4 \& input: 128 bit IPv6 string, \& signed 32 bit integer \& returns: scalar carry \& array (carry, result) .Ve .IP "\(bu" 4 add128($ipv6naddr1,$ipv6naddr2); .Sp Add two 128 bit string variables. .Sp .Vb 4 \& input: 128 bit string var1, \& 128 bit string var2 \& returns: scalar carry \& array (carry, result) .Ve .IP "\(bu" 4 sub128($ipv6naddr1,$ipv6naddr2); .Sp Subtract two 128 bit string variables. .Sp .Vb 4 \& input: 128 bit string var1, \& 128 bit string var2 \& returns: scalar carry \& array (carry, result) .Ve .Sp Note: The carry from this operation is the result of adding the one's complement of \s-1ARG2 +1\s0 to the \s-1ARG1.\s0 It is logically \&\fB\s-1NOT\s0 borrow\fR. .Sp .Vb 2 \& i.e. if ARG1 >= ARG2 then carry = 1 \& or if ARG1 < ARG2 then carry = 0 .Ve .IP "\(bu" 4 ($spurious,$cidr) = notcontiguous($mask128); .Sp This function counts the bit positions remaining in the mask when the rightmost '0's are removed. .Sp .Vb 6 \& input: 128 bit netmask \& returns true if there are spurious \& zero bits remaining in the \& mask, false if the mask is \& contiguous one\*(Aqs, \& 128 bit cidr .Ve .IP "\(bu" 4 \&\f(CW$ipv6naddr\fR = ipv4to6($netaddr); .Sp Convert an ipv4 network address into an ipv6 network address. .Sp .Vb 2 \& input: 32 bit network address \& returns: 128 bit network address .Ve .IP "\(bu" 4 \&\f(CW$ipv6naddr\fR = mask4to6($netaddr); .Sp Convert an ipv4 netowrk address into an ipv6 network mask. .Sp .Vb 2 \& input: 32 bit network/mask address \& returns: 128 bit network/mask address .Ve .Sp \&\s-1NOTE:\s0 returns the high 96 bits as one's .IP "\(bu" 4 \&\f(CW$ipv6naddr\fR = ipanyto6($netaddr); .Sp Similar to ipv4to6 except that this function takes either an IPv4 or IPv6 input and always returns a 128 bit IPv6 network address. .Sp .Vb 2 \& input: 32 or 128 bit network address \& returns: 128 bit network address .Ve .IP "\(bu" 4 \&\f(CW$ipv6naddr\fR = maskanyto6($netaddr); .Sp Similar to mask4to6 except that this function takes either an IPv4 or IPv6 netmask and always returns a 128 bit IPv6 netmask. .Sp .Vb 2 \& input: 32 or 128 bit network mask \& returns: 128 bit network mask .Ve .IP "\(bu" 4 \&\f(CW$netaddr\fR = ipv6to4($pv6naddr); .Sp 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. .Sp .Vb 2 \& input: 128 bit network address \& returns: 32 bit inet_aton network address .Ve .IP "\(bu" 4 \&\f(CW$bcdtext\fR = bin2bcd($bits128); .Sp Convert a 128 bit binary string into binary coded decimal text digits. .Sp .Vb 2 \& input: 128 bit string variable \& returns: string of bcd text digits .Ve .IP "\(bu" 4 \&\f(CW$bits128\fR = bcd2bin($bcdtxt); .Sp Convert a bcd text string to 128 bit string variable .Sp .Vb 2 \& input: string of bcd text digits \& returns: 128 bit string variable .Ve .SH "EXPORT_OK" .IX Header "EXPORT_OK" .Vb 10 \& hasbits \& shiftleft \& addconst \& add128 \& sub128 \& notcontiguous \& ipv4to6 \& mask4to6 \& ipanyto6 \& maskanyto6 \& ipv6to4 \& bin2bcd \& bcd2bin \& comp128 \& bin2bcdn \& bcdn2txt \& bcdn2bin \& simple_pack \& threads .Ve .SH "AUTHOR" .IX Header "AUTHOR" Michael Robinton <michael@bizsystems.com> .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2003 \- 2012, Michael Robinton <michael@bizsystems.com> .PP All rights reserved. .PP This program is free software; you can redistribute it and/or modify it under the terms of either: .PP .Vb 3 \& a) the GNU General Public License as published by the Free \& Software Foundation; either version 2, or (at your option) any \& later version, or \& \& b) the "Artistic License" which comes with this distribution. .Ve .PP This program is distributed in the hope that it will be useful, but \s-1WITHOUT ANY WARRANTY\s0; without even the implied warranty of \&\s-1MERCHANTABILITY\s0 or \s-1FITNESS FOR A PARTICULAR PURPOSE. \s0 See either the \s-1GNU\s0 General Public License or the Artistic License for more details. .PP You should have received a copy of the Artistic License with this distribution, in the file named \*(L"Artistic\*(R". If not, I'll be glad to provide one. .PP You should also have received a copy of the \s-1GNU\s0 General Public License along with this program in the file named \*(L"Copying\*(R". If not, write to the .PP .Vb 3 \& Free Software Foundation, Inc., \& 51 Franklin Street, Fifth Floor \& Boston, MA 02110\-1301 USA .Ve .PP or visit their web page on the internet at: .PP .Vb 1 \& http://www.gnu.org/copyleft/gpl.html. .Ve .SH "AUTHOR" .IX Header "AUTHOR" Michael Robinton <michael@bizsystems.com>
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