Data::Validate::IP(3) User Contributed Perl DocumentationData::Validate::IP(3)
NAME
Data::Validate::IP - IPv4 and IPv6 validation methods
VERSION
version 0.27
SYNOPSIS
use Data::Validate::IP qw(is_ipv4 is_ipv6);
my $suspect = '1.2.3.4';
if (is_ipv4($suspect)) {
print "Looks like an IPv4 address";
}
else {
print "Not an IPv4 address\n";
}
$suspect = '::1234';
if (is_ipv6($suspect)) {
print "Looks like an IPv6 address";
}
else {
print "Not an IPv6 address\n";
}
DESCRIPTION
This module provides a number IP address validation subs that both
validate and untaint their input. This includes both basic validation
("is_ipv4()" and "is_ipv6()") and special cases like checking whether
an address belongs to a specific network or whether an address is
public or private (reserved).
FUNCTIONS
All of the functions below are exported by default.
All functions return an untainted value if the test passes and undef if
it fails. In theory, this means that you should always check for a
defined status explicitly but in practice there are no valid IP
addresses where the string form evaluates to false in Perl.
Note that none of these functions actually attempt to test whether the
given IP address is routable from your device; they are purely semantic
checks.
is_ipv4($ip), is_ipv6($ip), is_ip($ip)
These functions simply check whether the address is a valid IPv4 or
IPv6 address.
is_innet_ipv4($ip, $network)
This subroutine checks whether the address belongs to the given IPv4
network. The $network argument can either be a string in CIDR notation
like "15.0.15.0/24" or a NetAddr::IP object.
This subroutine used to accept many more forms of network
specifications (anything Net::Netmask accepts) but this has been
deprecated.
is_unroutable_ipv4($ip)
This subroutine checks whether the address belongs to any of several
special use IPv4 networks - "0.0.0.0/8", "100.64.0.0/10",
"192.0.0.0/29", "198.18.0.0/15", "240.0.0.0/4" - as defined by RFC 5735
<http://tools.ietf.org/html/rfc5735>;, RFC 6333
<http://tools.ietf.org/html/rfc6333>;, and RFC 6958
<http://tools.ietf.org/html/rfc6598>;.
Arguably, these should be broken down further but this subroutine will
always exist for backwards compatibility.
is_private_ipv4($ip)
This subroutine checks whether the address belongs to any of the
private IPv4 networks - "10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"
- as defined by RFC 5735 <http://tools.ietf.org/html/rfc5735>;.
is_loopback_ipv4($ip)
This subroutine checks whether the address belongs to the IPv4 loopback
network - "127.0.0.0/8" - as defined by RFC 5735
<http://tools.ietf.org/html/rfc5735>;.
is_linklocal_ipv4($ip)
This subroutine checks whether the address belongs to the IPv4 link
local network - "169.254.0.0/16" - as defined by RFC 5735
<http://tools.ietf.org/html/rfc5735>;.
is_testnet_ipv4($ip)
This subroutine checks whether the address belongs to any of the IPv4
TEST-NET networks for use in documentation and example code -
"192.0.2.0/24", "198.51.100.0/24", and "203.0.113.0/24" - as defined by
RFC 5735 <http://tools.ietf.org/html/rfc5735>;.
is_anycast_ipv4($ip)
This subroutine checks whether the address belongs to the 6to4 relay
anycast network - "192.88.99.0/24" - as defined by RFC 5735
<http://tools.ietf.org/html/rfc5735>;.
is_multicast_ipv4($ip)
This subroutine checks whether the address belongs to the IPv4
multicast network - "224.0.0.0/4" - as defined by RFC 5735
<http://tools.ietf.org/html/rfc5735>;.
is_loopback_ipv6($ip)
This subroutine checks whether the address is the IPv6 loopback address
- "::1/128" - as defined by RFC 4291
<http://tools.ietf.org/html/rfc4291>;.
is_ipv4_mapped_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6
IPv4-mapped address network - "::ffff:0:0/96" - as defined by RFC 4291
<http://tools.ietf.org/html/rfc4291>;.
is_discard_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6 discard
prefix network - "100::/64" - as defined by RFC 6666
<http://tools.ietf.org/html/rfc6666>;.
is_special_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6 special
network - "2001::/23" - as defined by RFC 2928
<http://tools.ietf.org/html/rfc2928>;.
is_teredo_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6 TEREDO
network - "2001::/32" - as defined by RFC 4380
<http://tools.ietf.org/html/rfc4380>;.
Note that this network is a subnet of the larger special network at
"2001::/23".
is_orchid_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6 ORCHID
network - "2001::/32" - as defined by RFC 4380
<http://tools.ietf.org/html/rfc4380>;.
Note that this network is a subnet of the larger special network at
"2001::/23".
This network is currently scheduled to be returned to the special pool
in March of 2014 unless the IETF extends its use. If that happens this
subroutine will continue to exist but will always return false.
is_documentation_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6
documentation network - "2001:DB8::/32" - as defined by RFC 3849
<http://tools.ietf.org/html/rfc3849>;.
is_private_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6 private
network - "FC00::/7" - as defined by RFC 4193
<http://tools.ietf.org/html/rfc4193>;.
is_linklocal_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6 link-
local unicast network - "FE80::/10" - as defined by RFC 4291
<http://tools.ietf.org/html/rfc4291>;.
is_multicast_ipv6($ip)
This subroutine checks whether the address belongs to the IPv6
multicast network - "FF00::/8" - as defined by RFC 4291
<http://tools.ietf.org/html/rfc4291>;.
is_public_ipv4($ip), is_public_ipv6($ip), is_public_ip($ip)
These subroutines check whether the given IP address belongs to any of
the special case networks defined previously. Note that this is not
simply the opposite of checking "is_private_ipv4()" or
"is_private_ipv6()". The private networks are a subset of all the
special case networks.
is_linklocal_ip($ip)
This subroutine checks whether the address belongs to the IPv4 or IPv6
link-local unicast network.
is_loopback_ip($ip)
This subroutine checks whether the address is the IPv4 or IPv6 loopback
address.
is_multicast_ip($ip)
This subroutine checks whether the address belongs to the IPv4 or IPv6
multicast network.
is_private_ip($ip)
This subroutine checks whether the address belongs to the IPv4 or IPv6
private network.
OBJECT-ORIENTED INTERFACE
This module can also be used as a class. You can call
"Data::Validate::IP->new()" to get an object and then call any of the
validation subroutines as methods on that object. This is somewhat
pointless since the object will never contain any state but this
interface is kept for backwards compatibility.
SEE ALSO
IPv4
[RFC 5735] [RFC 1918]
IPv6
[RFC 2460] [RFC 4193] [RFC 4291] [RFC 6434]
ACKNOWLEDGEMENTS
Thanks to Richard Sonnen <sonnen AT richardsonnen.com> for writing the
Data::Validate module.
Thanks to Matt Dainty <matt AT bodgit-n-scarper.com> for adding the
"is_multicast_ipv4()" and "is_linklocal_ipv4()" code.
BUGS
Please report any bugs or feature requests to
"bug-data-validate-ip AT rt.org", or through the web interface at
<http://rt.cpan.org>;. I will be notified, and then you'll automatically
be notified of progress on your bug as I make changes.
Bugs may be submitted through
<https://github.com/houseabsolute/Data-Validate-IP/issues>;.
AUTHORS
o Neil Neely <neil AT neely.cx>
o Dave Rolsky <autarch AT urth.org>
CONTRIBUTOR
Gregory Oschwald <goschwald AT maxmind.com>
COPYRIGHT AND LICENSE
This software is copyright (c) 2016 by Neil Neely.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
perl v5.26.3 2016-11-17 Data::Validate::IP(3)
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