contrib/geo2nginx.pl - nginx source code

Data types defined

long2ip
print_subnets
Source code

#!/usr/bin/perl -w





# (c) Andrei Nigmatulin, 2005


#


# this script provided "as is", without any warranties. use it at your own risk.


#


# special thanx to Andrew Sitnikov for perl port


#


# this script converts CSV geoip database (free download at http://www.maxmind.com/app/geoip_country)


# to format, suitable for use with nginx_http_geo module (http://sysoev.ru/nginx)


#


# for example, line with ip range


#


#   "62.16.68.0","62.16.127.255","1041253376","1041268735","RU","Russian Federation"


#


# will be converted to four subnetworks:


#


#   62.16.68.0/22 RU;


#   62.16.72.0/21 RU;


#   62.16.80.0/20 RU;


#   62.16.96.0/19 RU;








use warnings;


use strict;





while( <STDIN> ){


    if (/"[^"]+","[^"]+","([^"]+)","([^"]+)","([^"]+)"/){


        print_subnets($1, $2, $3);


    }


}





‌sub  print_subnets {


    my ($a1, $a2, $c) = @_;


    my $l;


    while ($a1 <= $a2) {


        for ($l = 0; ($a1 & (1 << $l)) == 0 && ($a1 + ((1 << ($l + 1)) - 1)) <= $a2; $l++){};


        print long2ip($a1) . "/" . (32 - $l) . " " . $c . ";\n";


        $a1 += (1 << $l);


    }


}





‌sub long2ip {


    my $ip = shift;





    my $str = 0;





    $str = ($ip & 255);





    $ip >>= 8;


    $str = ($ip & 255).".$str";





    $ip >>= 8;


    $str = ($ip & 255).".$str";





    $ip >>= 8;


    $str = ($ip & 255).".$str";


}