NAME

IP::China - decide whether an internet address is from China

SYNOPSIS

    use utf8;
    use IP::China 'chinese_ip';
    if (chinese_ip ('127.0.0.1')) {
        print '你好';
    }

VERSION

This documents IP::China version 20170704 corresponding to git commit 72e6c5fac49cb99a8f4052ecff15d513047c4453 released on Sun Jul 30 15:30:33 2017 +0900.

This module incorporates the MaxMind GeoLite data of date 20170704 (YYYYMMDD).

DESCRIPTION

Decide whether an IP address originates from China.

FUNCTIONS

The module has only one function:

chinese_ip

    my $is_chinese = chinese_ip ('255.255.255.255');

Given an internet protocol string (version 4), decide whether it is Chinese or not. The return value is a true value (-1) if the address is from China, and a false value (0) if the address is not from China.

UPDATES

The module will be periodically updated. Allocated addresses for China may change. The script to build updates is included in the git repository for this distribution.

The script also includes some errata for the MaxMind list.

ERRATA

The data block as follows:

    74.125.16.64/26,1814991,6252001,,0,0

is recorded as in China (country code 1814991), but this block seems to belong to Google & not be in China, so this is discounted from the results.

SEE ALSO

http://www.lemoda.net/networking/block-china/ contains an article and some links to further information.

AUTHOR

Ben Bullock, <bkb@cpan.org>

COPYRIGHT & LICENCE

This package and associated files are copyright (C) 2013-2017 Ben Bullock.

You can use, copy, modify and redistribute this package and associated files under the Perl Artistic Licence or the GNU General Public Licence.

DATA COPYRIGHT

This product includes GeoLite data created by MaxMind, available from http://www.maxmind.com. The GeoLite databases are distributed under the Creative Commons Attribution-ShareAlike 3.0 Unported License. The GeoLite data is in the file block-china-data.c of the distribution.