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59 lines
1.2 KiB
Perl
59 lines
1.2 KiB
Perl
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#!/usr/bin/perl -w
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# (c) Andrei Nigmatulin, 2005
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#
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# this script provided "as is", without any warranties. use it at your own risk.
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#
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# special thanx to Andrew Sitnikov for perl port
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#
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# this script converts CSV geoip database (free download at http://www.maxmind.com/app/geoip_country)
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# to format, suitable for use with nginx_http_geo module (http://sysoev.ru/nginx)
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#
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# for example, line with ip range
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#
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# "62.16.68.0","62.16.127.255","1041253376","1041268735","RU","Russian Federation"
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#
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# will be converted to four subnetworks:
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#
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# 62.16.68.0/22 RU;
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# 62.16.72.0/21 RU;
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# 62.16.80.0/20 RU;
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# 62.16.96.0/19 RU;
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use warnings;
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use strict;
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while( <STDIN> ){
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if (/"[^"]+","[^"]+","([^"]+)","([^"]+)","([^"]+)"/){
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print_subnets($1, $2, $3);
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}
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}
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sub print_subnets {
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my ($a1, $a2, $c) = @_;
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my $l;
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while ($a1 <= $a2) {
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for ($l = 0; ($a1 & (1 << $l)) == 0 && ($a1 + ((1 << ($l + 1)) - 1)) <= $a2; $l++){};
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print long2ip($a1) . "/" . (32 - $l) . " " . $c . ";\n";
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$a1 += (1 << $l);
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}
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}
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sub long2ip {
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my $ip = shift;
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my $str = 0;
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$str = ($ip & 255);
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$ip >>= 8;
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$str = ($ip & 255).".$str";
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$ip >>= 8;
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$str = ($ip & 255).".$str";
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$ip >>= 8;
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$str = ($ip & 255).".$str";
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}
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