Data::Validate::IP(3pm)

1Data::Validate::IP(3) User Contributed Perl DocumentationData::Validate::IP(3)
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NAME

6       Data::Validate::IP - IPv4 and IPv6 validation methods
7

VERSION

9       version 0.27
10

SYNOPSIS

12         use Data::Validate::IP qw(is_ipv4 is_ipv6);
13
14         my $suspect = '1.2.3.4';
15         if (is_ipv4($suspect)) {
16             print "Looks like an IPv4 address";
17         }
18         else {
19             print "Not an IPv4 address\n";
20         }
21
22         $suspect = '::1234';
23         if (is_ipv6($suspect)) {
24             print "Looks like an IPv6 address";
25         }
26         else {
27             print "Not an IPv6 address\n";
28         }
29

DESCRIPTION

31       This module provides a number IP address validation subs that both
32       validate and untaint their input. This includes both basic validation
33       ("is_ipv4()" and "is_ipv6()") and special cases like checking whether
34       an address belongs to a specific network or whether an address is
35       public or private (reserved).
36

FUNCTIONS

38       All of the functions below are exported by default.
39
40       All functions return an untainted value if the test passes and undef if
41       it fails. In theory, this means that you should always check for a
42       defined status explicitly but in practice there are no valid IP
43       addresses where the string form evaluates to false in Perl.
44
45       Note that none of these functions actually attempt to test whether the
46       given IP address is routable from your device; they are purely semantic
47       checks.
48
49   is_ipv4($ip), is_ipv6($ip), is_ip($ip)
50       These functions simply check whether the address is a valid IPv4 or
51       IPv6 address.
52
53   is_innet_ipv4($ip, $network)
54       This subroutine checks whether the address belongs to the given IPv4
55       network. The $network argument can either be a string in CIDR notation
56       like "15.0.15.0/24" or a NetAddr::IP object.
57
58       This subroutine used to accept many more forms of network
59       specifications (anything Net::Netmask accepts) but this has been
60       deprecated.
61
62   is_unroutable_ipv4($ip)
63       This subroutine checks whether the address belongs to any of several
64       special use IPv4 networks - "0.0.0.0/8", "100.64.0.0/10",
65       "192.0.0.0/29", "198.18.0.0/15", "240.0.0.0/4" - as defined by RFC 5735
66       <http://tools.ietf.org/html/rfc5735>, RFC 6333
67       <http://tools.ietf.org/html/rfc6333>, and RFC 6958
68       <http://tools.ietf.org/html/rfc6598>.
69
70       Arguably, these should be broken down further but this subroutine will
71       always exist for backwards compatibility.
72
73   is_private_ipv4($ip)
74       This subroutine checks whether the address belongs to any of the
75       private IPv4 networks - "10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"
76       - as defined by RFC 5735 <http://tools.ietf.org/html/rfc5735>.
77
78   is_loopback_ipv4($ip)
79       This subroutine checks whether the address belongs to the IPv4 loopback
80       network - "127.0.0.0/8" - as defined by RFC 5735
81       <http://tools.ietf.org/html/rfc5735>.
82
83   is_linklocal_ipv4($ip)
84       This subroutine checks whether the address belongs to the IPv4 link
85       local network - "169.254.0.0/16" - as defined by RFC 5735
86       <http://tools.ietf.org/html/rfc5735>.
87
88   is_testnet_ipv4($ip)
89       This subroutine checks whether the address belongs to any of the IPv4
90       TEST-NET networks for use in documentation and example code -
91       "192.0.2.0/24", "198.51.100.0/24", and "203.0.113.0/24" - as defined by
92       RFC 5735 <http://tools.ietf.org/html/rfc5735>.
93
94   is_anycast_ipv4($ip)
95       This subroutine checks whether the address belongs to the 6to4 relay
96       anycast network - "192.88.99.0/24" - as defined by RFC 5735
97       <http://tools.ietf.org/html/rfc5735>.
98
99   is_multicast_ipv4($ip)
100       This subroutine checks whether the address belongs to the IPv4
101       multicast network - "224.0.0.0/4" - as defined by RFC 5735
102       <http://tools.ietf.org/html/rfc5735>.
103
104   is_loopback_ipv6($ip)
105       This subroutine checks whether the address is the IPv6 loopback address
106       - "::1/128" - as defined by RFC 4291
107       <http://tools.ietf.org/html/rfc4291>.
108
109   is_ipv4_mapped_ipv6($ip)
110       This subroutine checks whether the address belongs to the IPv6
111       IPv4-mapped address network - "::ffff:0:0/96" - as defined by RFC 4291
112       <http://tools.ietf.org/html/rfc4291>.
113
114   is_discard_ipv6($ip)
115       This subroutine checks whether the address belongs to the IPv6 discard
116       prefix network - "100::/64" - as defined by RFC 6666
117       <http://tools.ietf.org/html/rfc6666>.
118
119   is_special_ipv6($ip)
120       This subroutine checks whether the address belongs to the IPv6 special
121       network - "2001::/23" - as defined by RFC 2928
122       <http://tools.ietf.org/html/rfc2928>.
123
124   is_teredo_ipv6($ip)
125       This subroutine checks whether the address belongs to the IPv6 TEREDO
126       network - "2001::/32" - as defined by RFC 4380
127       <http://tools.ietf.org/html/rfc4380>.
128
129       Note that this network is a subnet of the larger special network at
130       "2001::/23".
131
132   is_orchid_ipv6($ip)
133       This subroutine checks whether the address belongs to the IPv6 ORCHID
134       network - "2001::/32" - as defined by RFC 4380
135       <http://tools.ietf.org/html/rfc4380>.
136
137       Note that this network is a subnet of the larger special network at
138       "2001::/23".
139
140       This network is currently scheduled to be returned to the special pool
141       in March of 2014 unless the IETF extends its use. If that happens this
142       subroutine will continue to exist but will always return false.
143
144   is_documentation_ipv6($ip)
145       This subroutine checks whether the address belongs to the IPv6
146       documentation network - "2001:DB8::/32" - as defined by RFC 3849
147       <http://tools.ietf.org/html/rfc3849>.
148
149   is_private_ipv6($ip)
150       This subroutine checks whether the address belongs to the IPv6 private
151       network - "FC00::/7" - as defined by RFC 4193
152       <http://tools.ietf.org/html/rfc4193>.
153
154   is_linklocal_ipv6($ip)
155       This subroutine checks whether the address belongs to the IPv6 link-
156       local unicast network - "FE80::/10" - as defined by RFC 4291
157       <http://tools.ietf.org/html/rfc4291>.
158
159   is_multicast_ipv6($ip)
160       This subroutine checks whether the address belongs to the IPv6
161       multicast network - "FF00::/8" - as defined by RFC 4291
162       <http://tools.ietf.org/html/rfc4291>.
163
164   is_public_ipv4($ip), is_public_ipv6($ip), is_public_ip($ip)
165       These subroutines check whether the given IP address belongs to any of
166       the special case networks defined previously. Note that this is not
167       simply the opposite of checking "is_private_ipv4()" or
168       "is_private_ipv6()". The private networks are a subset of all the
169       special case networks.
170
171   is_linklocal_ip($ip)
172       This subroutine checks whether the address belongs to the IPv4 or IPv6
173       link-local unicast network.
174
175   is_loopback_ip($ip)
176       This subroutine checks whether the address is the IPv4 or IPv6 loopback
177       address.
178
179   is_multicast_ip($ip)
180       This subroutine checks whether the address belongs to the IPv4 or IPv6
181       multicast network.
182
183   is_private_ip($ip)
184       This subroutine checks whether the address belongs to the IPv4 or IPv6
185       private network.
186

OBJECT-ORIENTED INTERFACE

188       This module can also be used as a class. You can call
189       "Data::Validate::IP->new()" to get an object and then call any of the
190       validation subroutines as methods on that object. This is somewhat
191       pointless since the object will never contain any state but this
192       interface is kept for backwards compatibility.
193

ACKNOWLEDGEMENTS

204       Thanks to Richard Sonnen <sonnen@richardsonnen.com> for writing the
205       Data::Validate module.
206
207       Thanks to Matt Dainty <matt@bodgit-n-scarper.com> for adding the
208       "is_multicast_ipv4()" and "is_linklocal_ipv4()" code.
209

BUGS

211       Please report any bugs or feature requests to
212       "bug-data-validate-ip@rt.cpan.org", or through the web interface at
213       <http://rt.cpan.org>. I will be notified, and then you'll automatically
214       be notified of progress on your bug as I make changes.
215
216       Bugs may be submitted through
217       <https://github.com/houseabsolute/Data-Validate-IP/issues>.
218

AUTHORS

220       •   Neil Neely <neil@neely.cx>
221
222       •   Dave Rolsky <autarch@urth.org>
223

CONTRIBUTOR

225       Gregory Oschwald <goschwald@maxmind.com>
226

COPYRIGHT AND LICENSE

228       This software is copyright (c) 2016 by Neil Neely.
229
230       This is free software; you can redistribute it and/or modify it under
231       the same terms as the Perl 5 programming language system itself.
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235perl v5.32.1                      2021-01-27             Data::Validate::IP(3)