Ben Bullock

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 20180703 corresponding to git commit 3e01997b421c99d7ef5beb8e695a7a756b031f23 released on Wed Jul 11 15:44:59 2018 +0900.

This module incorporates the MaxMind GeoLite data of date 20180703 (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) 2013-2018 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.

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.