Net::IP::XS(3) IPv4/IPv6 address library


use Net::IP::XS;
my $ip = new Net::IP::XS ('193.0.1/24') or die (Net::IP::XS::Error());
print ("IP : ".$ip->ip()."\n");
print ("Sho : ".$ip->short()."\n");
print ("Bin : ".$ip->binip()."\n");
print ("Int : ".$ip->intip()."\n");
print ("Mask: ".$ip->mask()."\n");
print ("Last: ".$ip->last_ip()."\n");
print ("Len : ".$ip->prefixlen()."\n");
print ("Size: ".$ip->size()."\n");
print ("Type: ".$ip->iptype()."\n");
print ("Rev: ".$ip->reverse_ip()."\n");


An XS (C) implementation of Net::IP. See Net::IP's documentation (as at version 1.25) for the functions and methods that are available.


Nothing is exported by default.
Error messages
In some instances this won't set error codes or messages where "Net::IP" would, though it should be mostly the same.
Object-oriented interface
The object-oriented interface uses function calls and hashref lookups internally, such that subclassing "Net::IP::XS" will not have the same effect as it does with "Net::IP".
Returns "undef" on failure, instead of dying.
Returns "undef" if either of the bitstring arguments is more than 128 characters in length.

Any character of the bitstring that is not a 0 is treated as a 1. The "Net::IP" version returns different results for different digits, and treats non-digits as 0.

The integer returned will be at most ((1 << 128) - 1) (i.e. the largest possible IPv6 address). "Net::IP" handles bitstrings of arbitrary length.
Returns "undef" if the IPv6 address argument is invalid.
Returns "undef" if the "len" argument is negative or greater than 32.
Does not set "Error" or "Errno" where there is a problem with an embedded IPv4 address within an IPv6 address.

Returns the zero IP address if the empty string is provided. The "Net::IP" version returns "undef".

Returns a full IPv6 address if a partial address is provided (e.g. returns 'ffff:ffff:0000:0000:0000:0000:0000:0000' if 'ffff:ffff' is provided). The "Net::IP" version returns the partial address.

Returns "undef" on an invalid IPv4/IPv6 address. The "Net::IP" version returns the zero address for IPv4 and whatever was provided for IPv6.

The mask returned will always have a length equal to the number of bits in an address of the specified IP version (e.g. an IPv4 mask will always comprise 32 characters). The "Net::IP" version will return a longer mask when the "len" argument is larger than the number of bits in the specified IP version.

If a negative "len" is provided, it will be treated as zero.

The bitstring returned will always be either 32 or 128 characters in length, and it returns "undef" if the integer argument would require more than 128 characters to represent as a bitstring. If an invalid version is provided, the returned bitstring will be 128 characters in length. The "Net::IP" version handles arbitrary integers and expands to accommodate those integers, regardless of the version argument. Also, if an invalid version is provided, the returned bitstring is only as long as is necessary to accommodate the bitstring.
Returns "undef" on an invalid IPv4/IPv6 address.
Returns an empty string if an invalid version (i.e. not 4 or 6) is provided. If the bitstring provided is longer than the number of bits in the specified version, then only the first 32/128 bits will be used in determining the last address. If the "len" provided is invalid (negative or more than 32/128 depending on the version), it will be treated as the maximum length of the specified version.
For the 'plus' style of string (e.g. ' + 255'), whitespace between the plus character and the parts before and after it is optional. In the "Net::IP" version, there has to be some whitespace before and after the plus character. Also, "undef" will be returned if the part after the plus sign is not a number. The "Net::IP" version will return two copies of the single address in this instance.

For the 'prefix range' style of string (e.g. ''), the part after the slash must be a number. If it is not, "undef" will be returned. The "Net::IP" version will return two copies of the single address in this instance.

Returns "undef" if the version argument is invalid.
The "len" argument determines the length of the reverse domain - e.g., if the arguments are '', '16' and '4', the reverse domain will be ''. The "Net::IP" version does not take the "len" argument into account for IPv4 addresses. For IPv6 addresses, a compressed IP address string may be provided.
Returns "undef" unless the first component of the string is less than or equal to 64 characters in length. The "Net::IP" version handles strings of arbitrary length.
Returns a string with a prefix length of zero (e.g. '') where "prefixlen" is not defined in the object. The "Net::IP" version will not include any prefix length in the returned string (e.g. '').


Tom Harrison, "<[email protected]>"


Please report any bugs or feature requests to "bug-net-ip-xs at", or through the web interface at <>.


Manuel Valente ("<[email protected]>") and the other authors of Net::IP.


Copyright (C) 2010-2015 Tom Harrison <[email protected]>.

Original inet_pton4 and inet_pton6 functions are copyright (C) 2006 Free Software Foundation.

Original interface, and the auth and ip_auth functions, are copyright (C) 1999-2002 RIPE NCC.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.