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An IP type for Perl6.


This library tries to fill a gap of a standard type for IP addresses that can be used in programs and other libraries. Preferrably Perl6 would ship with a default implementation for this common type, but until then, this is one attempt at defining such a type.

For our purposes, an IP address is an array of bytes. For IPv4, there are four bytes. For IPv6, sixteen. Perl6 only provides a byte type for native interfaces, and this doesn't have adequate degradation in case of errors, so I have opted to use my own Subsets::Common which defines a UInt8 subset that integrates nicely for common use.

This library parses common formats for IP address and creates a UInt8 array of the right size that is well-formed. That means values that are bytes (between 0 and 255). This means you may be able to create instances that are syntactically correct but are not applicable to real use given some point of IP specification. This library does not concern itself with determining if you instantiate a reserved or otherwise practically useless IP address, I leave this to you to determine.

There is also support for a CIDR type which lets you stipulate network ranges.

The best set of examples for use can be found in the tests in basic.t in the repository with this library.

IPv6 is complex. Please let me know what I have not properly supported.


use v6;
use Subsets::Common; # required
use Net::IP::Parse;

my IP $ipv4_from_str = IP.new(addr=><>);
my IP $ipv4_from_octets = IP.new(octets=>Array[UInt8].new(1,2,3,4));
say 'equal' if ($ipv4_from_str ip== $ipv4_from_octets);

my IP $ipv6_from_str = IP.new(addr=>'dfea:dfea:dfea:dfea:dfea:dfea:dfea:dfea');
my IP $ipv6_from_octets = IP.new(octets=>Array[UInt8].new(223,234,223,234,223,234,223,234,223,234,223,234,223,234,223,234));
say 'equal' if ($ipv6_from_str ip== $ipv6_from_octets);

my IP $ip1 = IP.new(addr=><2001:db8:a0b:12f0::1:1>);
say 'equal' if ($ip1.str eq '2001:db8:a0b:12f0:0:0:1:1');
my IP $ip2 = IP.new(addr=><2001:db8:a0b:12f0:0:0:1:1>);
say 'equal' if ($ip ip1== $ip2);

my IP $ip3 = IP.new(addr=><1:0:0:0:1:0:0:1>);
my $compressed = $ip3.compress_str;
say 'equal' if ($compressed eq '1::1:0:0:1');

my CIDR $cidr_ipv4 = CIDR.new(cidr=>'');
my IP $ip4 = IP.new(addr=>'');
say 'in' if ($ip4 in_cidr $cidr_ipv4);

my CIDR $cidr_ipv6 = CIDR.new(cidr=>'2001:db8::/32');
my IP $ip5 = IP.new(addr=>'2001:0db8:0000:0000:0000:0000:0000:0001');
say 'in' if ($ip5 in_cidr $cidr_ipv6);


Brad Clawsie (PAUSE:bradclawsie, email:brad@b7j0c.org)


This module is licensed under the BSD license, see: https://b7j0c.org/stuff/license.txt