Data::Validate::IP - ip validation methods
use Data::Validate::IP qw(is_ipv4); if(is_ipv4($suspect)){ print "Looks like an ip address"; } else { print "Not an ip address\n"; } # or as an object my $v = Data::Validate::IP->new(); die "not an ip" unless ($v->is_ipv4('domain.com'));
This module collects ip validation routines to make input validation, and untainting easier and more readable.
All functions return an untainted value if the test passes, and undef if it fails. This means that you should always check for a defined status explicitly. Don't assume the return will be true. (e.g. is_username('0'))
The value to test is always the first (and often only) argument.
$obj = Data::Validate::IP->new();
Returns a Data::Validator::IP object. This lets you access all the validator function calls as methods without importing them into your namespace or using the clumsy Data::Validate::IP::function_name() format.
None
Returns a Data::Validate::IP object
is_ipv4($value); or $obj->is_ipv4($value);
Returns the untainted ip address if the test value appears to be a well-formed ip address.
The potential ip to test.
Returns the untainted ip on success, undef on failure.
The function does not make any attempt to check whether an ip actually exists. It only looks to see that the format is appropriate.
is_ipv6($value);
is_private_ipv4($value); or $obj->is_private_ipv4($value);
Returns the untainted ip address if the test value appears to be a well-formed private ip address.
The function does not make any attempt to check whether an ip actually exists.
10.0.0.0/8 - This block is set aside for use in private networks. Its intended use is documented in [RFC1918]. Addresses within this block should not appear on the public Internet. 172.16.0.0/12 - This block is set aside for use in private networks. Its intended use is documented in [RFC1918]. Addresses within this block should not appear on the public Internet. 192.168.0.0/16 - This block is set aside for use in private networks. Its intended use is documented in [RFC1918]. Addresses within this block should not appear on the public Internet.
is_loopback_ipv4($value); or $obj->is_loopback_ipv4($value);
Returns the untainted ip address if the test value appears to be a well-formed loopback ip address.
127.0.0.0/8 - This block is assigned for use as the Internet host loopback address. A datagram sent by a higher level protocol to an address anywhere within this block should loop back inside the host. This is ordinarily implemented using only 127.0.0.1/32 for loopback, but no addresses within this block should ever appear on any network anywhere [RFC1700, page 5].
is_testnet_ipv4($value); or $obj->is_testnet_ipv4($value);
Returns the untainted ip address if the test value appears to be a well-formed testnet ip address.
192.0.2.0/24 - This block is assigned as "TEST-NET" for use in documentation and example code. It is often used in conjunction with domain names example.com or example.net in vendor and protocol documentation. Addresses within this block should not appear on the public Internet.
is_multicast_ipv4($value); or $obj->is_multicast_ipv4($value);
Returns the untainted ip addres if the test value appears to be a well-formed multicast ip address.
224.0.0.0/4 - This block, formerly known as the Class D address space, is allocated for use in IPv4 multicast address assignments. The IANA guidelines for assignments from this space are described in [RFC3171].
is_linklocal_ipv4($value); or $obj->is_linklocal_ipv4($value);
Returns the untainted ip addres if the test value appears to be a well-formed link-local ip address.
169.254.0.0/16 - This is the "link local" block. It is allocated for communication between hosts on a single link. Hosts obtain these addresses by auto-configuration, such as when a DHCP server may not be found.
is_linklocal_ipv6($value); or $obj->is_linklocal_ipv6($value);
A link-local address is formed by prepending the well-known link- local prefix FE80::0 [ADDR-ARCH] (of appropriate length) to the interface identifier. If the interface identifier has a length of N bits, the interface identifier replaces the right-most N zero bits of the link-local prefix. If the interface identifier is more than 118 bits in length, autoconfiguration fails and manual configuration is required. Note that interface identifiers will typically be 64-bits long and based on EUI-64 identifiers as described in [ADDR-ARCH].
is_public_ipv4($value); or $obj->is_public_ipv4($value);
Returns the untainted ip address if the test value appears to be a well-formed public ip address.
The function does not make any attempt to check whether an ip actually exists or could truly route. This is true for any non- private/testnet/loopback ip.
IPv4
b<[RFC 3330] [RFC 1918] [RFC 1700]>
IPv6
b<[RFC 2460] [RFC 4291] [RFC 4294]>
IPv6 Support is new, please test it thoroughly and report any bugs.
Neil Neely <neil@neely.cx>.
Thanks to Richard Sonnen <sonnen@richardsonnen.com> for writing the Data::Validate module.
Thanks to Matt Dainty <matt@bodgit-n-scarper.com> for adding the is_multicast_ipv4 and is_linklocal_ipv4 code.
Copyright (c) 2005-2009 Neil Neely.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.2 or, at your option, any later version of Perl 5 you may have available.
To install Data::Validate::IP, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Data::Validate::IP
CPAN shell
perl -MCPAN -e shell install Data::Validate::IP
For more information on module installation, please visit the detailed CPAN module installation guide.