NAME

Sys::Domainname - Get IP address information about this host

SYNOPSIS

use Sys::Domainname;

my $sysaddr = Sys::HostAddr.new;
my $string = $sysaddr->public;

my @addresses = $sysaddr->addresses;
my @interfaces = $sysaddr->interfaces;
my @on-int-addresses = $sysaddr->addresses-on-interface('eth0');

DESCRIPTION

This module provides methods for determining IP address information about a local host.

WARNING

This module only functions on relatively recent Linux.

ATTRIBUTES

ipv

This attribute refers to the IP Version the class operates against. It must be set to either 4 or 6. This defaults to 4.

ipv4-url

This is the API URL used to obtain the host's public IPv4 address. It defaults to using https://api.ipify.org. The URL must return the address as a plain text response.

ipv6-url

This is the API URL used to obtain the host's public IPv4 address. It defaults to using https://api6.ipify.org. The URL must return the address as a plain text response.

user-agent

This is the user agent string used to idenfiy this module when making web calls. It defaults to this module's name and version.

filter-localhost

If filter-localhost is true, only non-localhost addresses will be returned by this class's methods. This defaults to true.

Localhost is defined as any IPv4 address that begins with 127. or the IPv6 address ::1.

filter-link-local

If filter-link-local is true, only non-link-local addresses will be returned by this class's methods. This defaults to true and has no impact when ipv is set to 4.

Link local is defined as any IPv4 address that belong to fe80::/10.

METHODS

public(-->Str:D)

my $ha = Sys::HostAddr.new;
say "My public IP: { $ha.public }";

Returns the public IP address used by this host, as determined by contacting an external web service. When the ipv property is set to 6, this may return an IPv4 address if the API endpoint is not reachable via IPv6.

interfaces(-->Seq:D)

my $ha = Sys::HostAddr.new;
@interfaces = $ha.interfaces.list;

Returns the interface names for the interfaces on the system. Note that all interfaces available to the ip command will be returned, even if they do not have IP addresses assigned. If the ip command cannot be executed (for instance, on Windows), this will return a sequene with no members.

addresses(-->Seq:D)

my $ha = Sys::HostAddr.new;
@addresses = $ha.addresses.list;

Returns the addresses on the system. If the ip command cannot be executed (for instance, on Windows), this will return a sequene with no members.

addresses-on-interface(Str:D $interface -->Seq:D)

my $ha = Sys::HostAddr.new;
@addresses = $ha.addresses-on-interface("eth1").list;

Returns the addresses on the interface provided. If the ip command cannot be executed (for instance, on Windows), this will return a sequene with no members.

guess-ip-for-host(Str:D $ip -->Str)

my $ha = Sys::HostAddr.new;
$address = $ha.guess-ip-for-host('192.0.2.1');

Returns an address associated with the interface used to route packets to the given destination. Where more than one address exists on that interface, or more than one interface has a route to the given host, only one will be returned.

This will return Str (undefined type object) if either the host isn't routed in the routing table or if the ip command cannot be executed (for instance, on Windows).

guess-main(-->Str)

my $ha = Sys::HostAddr.new;
$address = $ha.guess-main-for-ipv4

Returns the result of either .guess-ip-for-host('0.0.0.0') or .guess-ip-for-host('2000::') depending on the value of $.ipv4.

guess-main-for-ipv6(-->Str)

my $ha = Sys::HostAddr.new;
$address = $ha.guess-main-for-ipv6

Returns the result of .guess-ip-for-host('2000::').

AUTHOR

Joelle Maslak jmaslak@antelope.net

Inspired by Perl 5 Sys::Hostname by Jeremy Kiester.

COPYRIGHT AND LICENSE

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.