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1 #!/usr/bin/perl -w
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2
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3 # (c) Andrei Nigmatulin, 2005
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4 #
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5 # this script provided "as is", without any warranties. use it at your own risk.
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6 #
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7 # special thanx to Andrew Sitnikov for perl port
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8 #
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9 # this script converts CSV geoip database (free download at http://www.maxmind.com/app/geoip_country)
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10 # to format, suitable for use with nginx_http_geo module (http://sysoev.ru/nginx)
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11 #
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12 # for example, line with ip range
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13 #
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14 # "62.16.68.0","62.16.127.255","1041253376","1041268735","RU","Russian Federation"
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15 #
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16 # will be converted to four subnetworks:
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17 #
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18 # 62.16.68.0/22 RU;
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19 # 62.16.72.0/21 RU;
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20 # 62.16.80.0/20 RU;
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21 # 62.16.96.0/19 RU;
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22
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23
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24 use warnings;
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25 use strict;
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26
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27 while( <STDIN> ){
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28 if (/"[^"]+","[^"]+","([^"]+)","([^"]+)","([^"]+)"/){
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29 print_subnets($1, $2, $3);
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30 }
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31 }
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32
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33 sub print_subnets {
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34 my ($a1, $a2, $c) = @_;
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35 my $l;
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36 while ($a1 <= $a2) {
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37 for ($l = 0; ($a1 & (1 << $l)) == 0 && ($a1 + ((1 << ($l + 1)) - 1)) <= $a2; $l++){};
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38 print long2ip($a1) . "/" . (32 - $l) . " " . $c . ";\n";
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39 $a1 += (1 << $l);
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40 }
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41 }
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42
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43 sub long2ip {
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44 my $ip = shift;
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45
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46 my $str = 0;
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47
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48 $str = ($ip & 255);
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49
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50 $ip >>= 8;
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51 $str = ($ip & 255).".$str";
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52
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53 $ip >>= 8;
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54 $str = ($ip & 255).".$str";
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55
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56 $ip >>= 8;
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57 $str = ($ip & 255).".$str";
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58 }
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