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#!/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";
}