const request = require('request');
const ip = require('ip');

request('https://raw.githubusercontent.com/client9/ipcat/master/datacenters.csv', (error, response, body) => {
    if(error || response.statusCode != 200) {
        return console.error("Failed to get database");
    }

    var lines = body.split('\n').map(e => {
        return e.split(',');
    });

    lines.forEach(e => {

        if(e.length != 4) return;

        let start = ip.toLong(e[0]);
        let end = ip.toLong(e[1]);

        console.log('deny '+e[0] +'/'+ ((~(start^end))>>>0).toString(2).indexOf('0') +'; # '+e[2]);
    });
});