102 lines
3.3 KiB
JavaScript
102 lines
3.3 KiB
JavaScript
'use strict';
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module.exports.create = function (deps, conf) {
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var network = deps.PromiseA.promisify(deps.recase.camelCopy(require('network')));
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var loopback = require('./loopback').create(deps, conf);
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var dnsCtrl = require('./dns-ctrl').create(deps, conf);
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var localAddr, gateway;
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var tunnelActive = false;
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async function checkNetworkEnv() {
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// Since we can't detect the OS level events when a user plugs in an ethernet cable to recheck
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// what network environment we are in we check our local network address and the gateway to
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// determine if we need to run the loopback check and router configuration again.
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var gw = await network.getGatewayIpAsync();
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var addr = await network.getPrivateIpAsync();
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if (localAddr === addr && gateway === gw) {
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return;
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}
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localAddr = addr;
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gateway = gw;
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var loopResult = await loopback('seth.daplie.me');
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var notLooped = Object.keys(loopResult.ports).filter(function (port) {
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return !loopResult.ports[port];
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});
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// if (notLooped.length) {
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// // TODO: try to automatically configure router to forward ports to us.
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// }
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// If we are on a public accress or all ports we are listening on are forwarded to us then
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// we don't need the tunnel and we can set the DNS records for all our domains to our public
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// address. Otherwise we need to use the tunnel to accept traffic.
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if (!notLooped.length) {
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if (tunnelActive) {
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deps.tunnelClients.disconnect();
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tunnelActive = false;
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}
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} else {
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if (!tunnelActive) {
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var session = await getSession();
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await deps.tunnelClients.start(session, conf.dns.domains);
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tunnelActive = true;
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}
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}
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}
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async function getSession() {
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var sessions = await deps.storage.owners.all();
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var session = sessions.filter(function (sess) {
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return sess.token.scp.indexOf('dns') >= 0;
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})[0];
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if (!session) {
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throw new Error('no sessions with DNS grants');
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}
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// The OAUTH3 library stores some things on the root session object that we usually
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// just leave inside the token, but we need to pull those out before we use it here
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session.provider_uri = session.provider_uri || session.token.provider_uri || session.token.iss;
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session.client_uri = session.client_uri || session.token.azp;
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session.scope = session.scope || session.token.scp;
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return session;
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}
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var publicAddress;
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async function recheckPubAddr() {
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if (!conf.ddns.enabled) {
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return;
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}
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await checkNetworkEnv();
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if (tunnelActive) {
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return;
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}
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var session = await getSession();
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var directives = await deps.OAUTH3.discover(session.token.aud);
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var addr = await loopback.checkPublicAddr(directives.api);
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if (publicAddress === addr) {
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return;
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}
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if (conf.debug) {
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console.log('previous public address',publicAddress, 'does not match current public address', addr);
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}
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await dnsCtrl.setDeviceAddress(session, addr, conf.ddns.domains);
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publicAddress = addr;
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}
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recheckPubAddr();
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setInterval(recheckPubAddr, 5*60*1000);
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return {
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loopbackServer: loopback.server
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, setDeviceAddress: dnsCtrl.setDeviceAddress
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, getDeviceAddresses: dnsCtrl.getDeviceAddresses
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, recheckPubAddr: recheckPubAddr
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};
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};
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