goldilocks.js/match-ips.js

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2016-10-06 22:42:38 +00:00
'use strict';
var PromiseA = require('bluebird');
module.exports.match = function (servername, opts) {
return PromiseA.promisify(require('ipify'))().then(function (ip) {
var dns = PromiseA.promisifyAll(require('dns'));
opts.externalIps = [ { address: ip, family: 'IPv4' } ];
opts.ifaces = require('./local-ip.js').find({ externals: opts.externalIps });
opts.externalIfaces = Object.keys(opts.ifaces).reduce(function (all, iname) {
var iface = opts.ifaces[iname];
iface.ipv4.forEach(function (addr) {
if (addr.external) {
addr.iface = iname;
all.push(addr);
}
});
iface.ipv6.forEach(function (addr) {
if (addr.external) {
addr.iface = iname;
all.push(addr);
}
});
return all;
}, []).filter(Boolean);
function resolveIps(hostname) {
var allIps = [];
return PromiseA.all([
dns.resolve4Async(hostname).then(function (records) {
records.forEach(function (ip) {
allIps.push({
address: ip
, family: 'IPv4'
});
});
}, function () {})
, dns.resolve6Async(hostname).then(function (records) {
records.forEach(function (ip) {
allIps.push({
address: ip
, family: 'IPv6'
});
});
}, function () {})
]).then(function () {
return allIps;
});
}
function resolveIpsAndCnames(hostname) {
return PromiseA.all([
resolveIps(hostname)
, dns.resolveCnameAsync(hostname).then(function (records) {
return PromiseA.all(records.map(function (hostname) {
return resolveIps(hostname);
})).then(function (allIps) {
return allIps.reduce(function (all, ips) {
return all.concat(ips);
}, []);
});
}, function () {
return [];
})
]).then(function (ips) {
return ips.reduce(function (all, set) {
return all.concat(set);
}, []);
});
}
return resolveIpsAndCnames(servername).then(function (allIps) {
var matchingIps = [];
if (!allIps.length) {
console.warn("Could not resolve '" + servername + "'");
}
// { address, family }
allIps.some(function (ip) {
function match(addr) {
if (ip.address === addr.address) {
matchingIps.push(addr);
}
}
opts.externalIps.forEach(match);
// opts.externalIfaces.forEach(match);
Object.keys(opts.ifaces).forEach(function (iname) {
var iface = opts.ifaces[iname];
iface.ipv4.forEach(match);
iface.ipv6.forEach(match);
});
return matchingIps.length;
});
return matchingIps;
});
});
};