telebit.js/bin/telebitd.js

1228 lines
37 KiB
JavaScript
Executable File

#!/usr/bin/env node
(function () {
'use strict';
var PromiseA;
try {
PromiseA = require('bluebird');
} catch(e) {
PromiseA = global.Promise;
}
var pkg = require('../package.json');
var url = require('url');
var path = require('path');
var os = require('os');
var fs = require('fs');
var common = require('../lib/cli-common.js');
var http = require('http');
var TOML = require('toml');
var YAML = require('js-yaml');
var recase = require('recase').create({});
var camelCopy = recase.camelCopy.bind(recase);
var snakeCopy = recase.snakeCopy.bind(recase);
var TPLS = TOML.parse(fs.readFileSync(path.join(__dirname, "../lib/en-us.toml"), 'utf8'));
var startTime = Date.now();
var connectTimes = [];
var TelebitRemote = require('../lib/daemon/index.js').TelebitRemote;
var state = { homedir: os.homedir(), servernames: {}, ports: {}, keepAlive: { state: false } };
var argv = process.argv.slice(2);
var confIndex = argv.indexOf('--config');
var confpath;
var confargs;
if (-1 === confIndex) {
confIndex = argv.indexOf('-c');
}
if (-1 !== confIndex) {
confargs = argv.splice(confIndex, 2);
confpath = confargs[1];
}
var cancelUpdater = require('../lib/updater')(pkg);
function help() {
console.info(TPLS.daemon.help.main.replace(/{version}/g, pkg.version));
}
var verstr = [ pkg.name + ' daemon v' + pkg.version ];
if (-1 === confIndex) {
// We have two possible valid paths if no --config is given (i.e. run from an npm-only install)
// * {install}/etc/telebitd.yml
// * ~/.config/telebit/telebitd.yml
// We'll asume the later since the installers include --config in the system launcher script
confpath = common.DEFAULT_CONFIG_PATH;
verstr.push('(--config "' + confpath + '")');
}
if (-1 !== argv.indexOf('-h') || -1 !== argv.indexOf('--help')) {
help();
process.exit(0);
}
if (!confpath || /^--/.test(confpath)) {
help();
process.exit(1);
}
state._confpath = confpath;
var tokenpath = path.join(path.dirname(state._confpath), 'access_token.txt');
var token;
try {
token = fs.readFileSync(tokenpath, 'ascii').trim();
//console.log('[DEBUG] access_token', typeof token, token);
} catch(e) {
// ignore
}
var controlServer;
var myRemote;
function getServername(servernames, sub) {
if (state.servernames[sub]) {
return sub;
}
var names = Object.keys(servernames).map(function (servername) {
if ('*.' === servername.slice(0,2)) {
return servername;
}
return '*.' + servername;
}).sort(function (a, b) {
return b.length - a.length;
});
return names.filter(function (pattern) {
// '.example.com' = '*.example.com'.split(1)
var subPiece = pattern.slice(1);
// '.com' = 'sub.example.com'.slice(-4)
// '.example.com' = 'sub.example.com'.slice(-12)
if (subPiece === sub.slice(-subPiece.length)) {
return subPiece;
}
})[0];
}
function saveConfig(cb) {
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), cb);
}
var controllers = {};
controllers.http = function (req, res, opts) {
function getAppname(pathname) {
// port number
if (String(pathname) === String(parseInt(pathname, 10))) {
return String(pathname);
}
var paths = pathname.split(/[\\\/\:]/);
// rid trailing slash(es)
while (!paths[paths.length -1]) {
paths.pop();
}
var name = paths.pop();
name = path.basename(name, path.extname(name));
name = name.replace(/\./, '-').replace(/-+/, '-');
return name;
}
if (!opts.body) {
res.statusCode = 422;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({"error":{"message":"module \'http\' needs more arguments"}}));
return;
}
var active = true;
var portOrPath = opts.body[0];
var appname = getAppname(portOrPath);
var subdomain = opts.body[1];
var remoteHost;
// Assign an FQDN to brief subdomains
// ex: foo => foo.rando.telebit.cloud
if (subdomain && !/\./.test(subdomain)) {
Object.keys(state.servernames).some(function (key) {
if (state.servernames[key].wildcard) {
subdomain += '.' + key;
}
});
}
if ('none' === portOrPath || 'none' === subdomain) {
// ~/telebit http none // turn off all
// ~/telebit http none none // (same as above)
// ~/telebit http 3000 none // turn off this handler
// ~/telebit http none sub.example.com // turn off this subdomain
// ~/telebit http none sub // TODO
Object.keys(state.servernames).forEach(function (key) {
if ('none' === portOrPath && 'none' === subdomain) {
delete state.servernames[key].handler;
return;
}
if (state.servernames[key].handler === portOrPath) {
delete state.servernames[key].handler;
return;
}
if (!subdomain || key === subdomain) {
if (state.servernames[key].sub) {
delete state.servernames[key];
} else {
delete state.servernames[key].handler;
}
return;
}
});
delete state.servernames[subdomain];
remoteHost = 'none';
} else if (subdomain && 'none' !== subdomain) {
// use a subdomain with this handler
var handlerName = getServername(state.servernames, subdomain);
if (!handlerName) {
active = false;
}
if (!state.servernames[subdomain]) {
state.servernames[subdomain] = { sub: true };
}
if ('none' === portOrPath) {
delete state.servernames[subdomain].handler;
} else {
state.servernames[subdomain].handler = portOrPath;
}
remoteHost = subdomain;
} else {
// just replace the default domain
if (!Object.keys(state.servernames).sort(function (a, b) {
return b.length - a.length;
}).some(function (key) {
if (state.servernames[key].handler === appname) {
// example.com.handler: 3000 // already set
remoteHost = key;
return true;
}
if (state.servernames[key].wildcard) {
//var prefix = appname + '.' + key;
var prefix = key;
if (!state.servernames[prefix]) {
state.servernames[prefix] = { sub: undefined };
}
state.servernames[prefix].handler = portOrPath;
remoteHost = prefix;
return true;
}
})) {
Object.keys(state.servernames).some(function (key) {
//var prefix = appname + '.' + key;
var prefix = key;
state.servernames[key].handler = portOrPath;
remoteHost = prefix;
return true;
});
}
}
state.config.servernames = state.servernames;
saveConfig(function (err) {
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({
success: true
, active: active
, remote: remoteHost
, local: portOrPath
, saved: !err
, module: 'http'
}));
});
};
controllers.tcp = function (req, res, opts) {
if (!opts.body) {
res.statusCode = 422;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({ error: { message: "module 'tcp' needs more arguments" } }));
return;
}
var active;
var remotePort = opts.body[1];
var portOrPath = opts.body[0];
// portnum
if (remotePort) {
if (!state.ports[remotePort]) {
active = false;
} else {
// forward-to port-or-module
// TODO with the connect event bug fixed, we should now be able to send files over tcp
state.ports[remotePort].handler = portOrPath;
}
} else {
if (!Object.keys(state.ports).some(function (key) {
if (!state.ports[key].handler) {
state.ports[key].handler = portOrPath;
remotePort = key;
return true;
}
})) {
Object.keys(state.ports).some(function (key) {
state.ports[key].handler = portOrPath;
remotePort = key;
return true;
});
}
}
state.config.ports = state.ports;
saveConfig(function (err) {
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({
success: true
, active: active
, remote: remotePort
, local: portOrPath
, saved: !err
, module: 'tcp'
}));
});
};
controllers.ssh = function (req, res, opts) {
if (!opts.body) {
res.statusCode = 422;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({"error":{"message":"module 'ssh' needs more arguments"}}));
return;
}
function sshSuccess() {
//state.config.sshAuto = state.sshAuto;
saveConfig(function (err) {
var local = state.config.sshAuto;
if (false !== local && !local) {
local = 22;
}
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({
success: true
, active: true
, remote: Object.keys(state.config.ports)[0]
, local: local
, saved: !err
, module: 'ssh'
}));
});
}
var sshAuto = opts.body[0];
if (-1 !== [ 'false', 'none', 'off', 'disable' ].indexOf(sshAuto)) {
state.config.sshAuto = false;
sshSuccess();
return;
}
if (-1 !== [ 'true', 'auto', 'on', 'enable' ].indexOf(sshAuto)) {
state.config.sshAuto = 22;
sshSuccess();
return;
}
sshAuto = parseInt(sshAuto, 10);
if (!sshAuto || sshAuto <= 0 || sshAuto > 65535) {
res.statusCode = 400;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({ error: { message: "bad ssh_auto option '" + opts.body[0] + "'" } }));
return;
}
state.config.sshAuto = sshAuto;
sshSuccess();
};
var serveStatic = require('serve-static')(path.join(__dirname, '../lib/admin/'));
function handleRemoteClient(req, res) {
if (/^\/(rpc|api)\//.test(req.url)) {
return handleApi(req, res);
}
serveStatic(req, res, require('finalhandler')(req, res));
}
function handleApi(req, res) {
var opts = url.parse(req.url, true);
if (false && opts.query._body) {
try {
opts.body = JSON.parse(decodeURIComponent(opts.query._body, true));
} catch(e) {
res.statusCode = 500;
res.end('{"error":{"message":"?_body={{bad_format}}"}}');
return;
}
}
function listSuccess() {
var dumpy = {
servernames: state.servernames
, ports: state.ports
, ssh: state.config.sshAuto || 'disabled'
, code: 'CONFIG'
};
if (state.otp) {
dumpy.device_pair_code = state.otp;
}
if (state._can_pair && state.config.email && !state.token) {
dumpy.code = "AWAIT_AUTH";
dumpy.message = "Please run 'telebit init' to authenticate.";
}
res.end(JSON.stringify(dumpy));
}
function getConfigOnly() {
var resp = JSON.parse(JSON.stringify(state.config));
resp.version = pkg.version;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify(resp));
}
//
// without proper config
//
function saveAndReport() {
console.log('[DEBUG] saveAndReport config write', confpath);
console.log(YAML.safeDump(snakeCopy(state.config)));
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
if (err) {
res.statusCode = 500;
res.setHeader('Content-Type', 'application/json');
res.end('{"error":{"message":"Could not save config file after init: ' + err.message.replace(/"/g, "'")
+ '.\nPerhaps check that the file exists and your user has permissions to write it?"}}');
return;
}
listSuccess();
});
}
function initOrConfig() {
var conf = {};
if (!opts.body) {
res.statusCode = 422;
res.end('{"error":{"message":"module \'init\' needs more arguments"}}');
return;
}
// relay, email, agree_tos, servernames, ports
//
opts.body.forEach(function (opt) {
var parts = opt.split(/:/);
if ('true' === parts[1]) {
parts[1] = true;
} else if ('false' === parts[1]) {
parts[1] = false;
} else if ('null' === parts[1]) {
parts[1] = null;
} else if ('undefined' === parts[1]) {
parts[1] = undefined;
}
conf[parts[0]] = parts[1];
});
// TODO camelCase query
state.config.email = conf.email || state.config.email || '';
if ('undefined' !== typeof conf.agreeTos
|| 'undefined' !== typeof conf.agreeTos ) {
state.config.agreeTos = conf.agreeTos || conf.agree_tos;
}
state.otp = conf._otp; // this should only be done on the client side
state.config.relay = conf.relay || state.config.relay || '';
console.log();
console.log('conf.token', typeof conf.token, conf.token);
console.log('state.config.token', typeof state.config.token, state.config.token);
state.config.token = conf.token || state.config.token || null;
state.config.secret = conf.secret || state.config.secret || null;
state.pretoken = conf.pretoken || state.config.pretoken || null;
if (state.secret) {
console.log('state.secret');
state.token = common.signToken(state);
}
if (!state.token) {
console.log('!state.token');
state.token = conf._token;
}
console.log();
console.log('JSON.stringify(conf)');
console.log(JSON.stringify(conf));
console.log();
console.log('JSON.stringify(state)');
console.log(JSON.stringify(state));
console.log();
if ('undefined' !== typeof conf.newsletter) {
state.config.newsletter = conf.newsletter;
}
if ('undefined' !== typeof conf.communityMember
|| 'undefined' !== typeof conf.community_member) {
state.config.communityMember = conf.communityMember || conf.community_member;
}
if ('undefined' !== typeof conf.telemetry) {
state.config.telemetry = conf.telemetry;
}
if (conf._servernames) {
(conf._servernames||'').split(/,/g).forEach(function (key) {
if (!state.config.servernames[key]) {
state.config.servernames[key] = { sub: undefined };
}
});
}
if (conf._ports) {
(conf._ports||'').split(/,/g).forEach(function (key) {
if (!state.config.ports[key]) {
state.config.ports[key] = {};
}
});
}
if (!state.config.relay || !state.config.email || !state.config.agreeTos) {
console.warn('missing config');
res.statusCode = 400;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({
error: {
code: "E_INIT"
, message: "Missing important config file params"
, _params: JSON.stringify(conf)
, _config: JSON.stringify(state.config)
, _body: JSON.stringify(opts.body)
}
}));
return;
}
// init also means enable
delete state.config.disable;
safeStartTelebitRemote(true).then(saveAndReport).catch(handleError);
}
function restart() {
console.info("[telebitd.js] server closing...");
state.keepAlive.state = false;
if (myRemote) {
myRemote.end();
myRemote.on('end', respondAndClose);
// failsafe
setTimeout(function () {
console.info("[telebitd.js] closing too slowly, force quit");
respondAndClose();
}, 5 * 1000);
} else {
respondAndClose();
}
function respondAndClose() {
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({ success: true }));
controlServer.close(function () {
console.info("[telebitd.js] server closed");
setTimeout(function () {
// system daemon will restart the process
process.exit(22); // use non-success exit code
}, 100);
});
}
}
function invalidConfig() {
res.statusCode = 400;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({
error: { code: "E_CONFIG", message: "Invalid config file. Please run 'telebit init'" }
}));
}
function saveAndCommit() {
state.config.servernames = state.servernames;
state.config.ports = state.ports;
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
if (err) {
res.statusCode = 500;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({
"error":{"message":"Could not save config file. Perhaps you're not running as root?"}
}));
return;
}
listSuccess();
});
}
function handleError(err) {
res.statusCode = 500;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({
error: { message: err.message, code: err.code }
}));
}
function enable() {
delete state.config.disable;// = undefined;
state.keepAlive.state = true;
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
if (err) {
err.message = "Could not save config file. Perhaps you're user doesn't have permission?";
handleError(err);
return;
}
// TODO XXX myRemote.active
if (myRemote) {
listSuccess();
return;
}
safeStartTelebitRemote(true).then(listSuccess).catch(handleError);
});
}
function disable() {
state.config.disable = true;
state.keepAlive.state = false;
if (myRemote) { myRemote.end(); myRemote = null; }
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
res.setHeader('Content-Type', 'application/json');
if (err) {
err.message = "Could not save config file. Perhaps you're user doesn't have permission?";
handleError(err);
return;
}
res.end('{"success":true}');
});
}
function getStatus() {
var now = Date.now();
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify(
{ module: 'status'
, port: (state.config.ipc && state.config.ipc.port || state._ipc.port || undefined)
, status: (state.config.disable ? 'disabled' : 'enabled')
, ready: ((state.config.relay && (state.config.token || state.config.agreeTos)) ? true : false)
, active: !!myRemote
, connected: 'maybe (todo)'
, version: pkg.version
, servernames: state.servernames
, proctime: Math.round(process.uptime() * 1000)
, uptime: now - startTime
, runtime: connectTimes.length && (now - connectTimes[0]) || 0
, reconnects: connectTimes.length
}
));
}
function route() {
if (/\b(config)\b/.test(opts.pathname) && /get/i.test(req.method)) {
getConfigOnly();
return;
}
if (/\b(init|config)\b/.test(opts.pathname)) {
initOrConfig();
return;
}
if (/restart/.test(opts.pathname)) {
restart();
return;
}
//
// Check for proper config
//
if (!state.config.relay || !state.config.email || !state.config.agreeTos) {
invalidConfig();
return;
}
//
// With proper config
//
if (/http/.test(opts.pathname)) {
controllers.http(req, res, opts);
return;
}
if (/tcp/.test(opts.pathname)) {
controllers.tcp(req, res, opts);
return;
}
if (/save|commit/.test(opts.pathname)) {
saveAndCommit();
return;
}
if (/ssh/.test(opts.pathname)) {
controllers.ssh(req, res, opts);
return;
}
if (/enable/.test(opts.pathname)) {
enable();
return;
}
if (/disable/.test(opts.pathname)) {
disable();
return;
}
if (/status/.test(opts.pathname)) {
getStatus();
return;
}
if (/list/.test(opts.pathname)) {
listSuccess();
return;
}
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({"error":{"message":"unrecognized rpc"}}));
}
if (!req.headers['content-length'] && !req.headers['content-type']) {
route();
return;
}
var body = '';
req.on('readable', function () {
var data;
while (true) {
data = req.read();
if (!data) { break; }
body += data.toString();
}
});
req.on('end', function () {
try {
opts.body = JSON.parse(body);
} catch(e) {
res.statusCode = 400;
res.end('{"error":{"message":"POST body is not valid json"}}');
return;
}
route();
});
}
function serveControlsHelper() {
controlServer = http.createServer(handleRemoteClient);
if (fs.existsSync(state._ipc.path)) {
fs.unlinkSync(state._ipc.path);
}
// mask is so that processes owned by other users
// can speak to this process, which is probably root-owned
var oldUmask = process.umask(0x0000);
var serverOpts = {
writableAll: true
, readableAll: true
, exclusive: false
};
if (!state.config.ipc) {
state.config.ipc = {};
}
if (!state.config.ipc.path) {
state.config.ipc.path = path.dirname(state._ipc.path);
}
require('mkdirp').sync(state.config.ipc.path);
if (!state.config.ipc.type) {
state.config.ipc.type = 'port';
}
var portFile = path.join(state.config.ipc.path, 'telebit.port');
if (fs.existsSync(portFile)) {
state._ipc.port = parseInt(fs.readFileSync(portFile, 'utf8').trim(), 10);
}
if ('socket' === state._ipc.type) {
require('mkdirp').sync(path.dirname(state._ipc.path));
}
// https://nodejs.org/api/net.html#net_server_listen_options_callback
// path is ignore if port is defined
// https://git.coolaj86.com/coolaj86/telebit.js/issues/23#issuecomment-326
if ('port' === state.config.ipc.type) {
serverOpts.host = 'localhost';
serverOpts.port = state._ipc.port || 0;
} else {
serverOpts.path = state._ipc.path;
}
controlServer.listen(serverOpts, function () {
process.umask(oldUmask);
var address = this.address();
if (address.port) {
common.setPort(state.config, address.port);
}
//console.log(this.address());
console.info("[info] Listening for commands on", address);
});
controlServer.on('error', function (err) {
if ('EADDRINUSE' === err.code) {
try {
fs.unlinkSync(portFile);
} catch(e) {
// nada
}
setTimeout(function () {
console.log("trying again");
serveControlsHelper();
}, 1000);
return;
}
console.error('failed to start c&c server:', err);
});
}
function serveControls() {
serveControlsHelper();
if (state.config.disable) {
console.info("[info] starting disabled");
return;
}
// This will remain in a disconnect state and wait for an init
if (!(state.config.relay && (state.config.token || state.config.pretoken))) {
console.info("[info] waiting for init/authentication (missing relay and/or token)");
return;
}
console.info("[info] connecting with stored token");
return safeStartTelebitRemote().catch(function (err) {
// ignore, it'll keep looping anyway
console.warn("[debug] error that (supposedly) shouldn't matter:");
console.warn(err);
});
}
function parseConfig(err, text) {
function run() {
if (!state.config) {
state.config = {};
}
common._init(
state.config.root || path.join(os.homedir(), '.local/share/telebit') // || path.join(__dirname, '..')
, (state.config.root && path.join(state.config.root, 'etc')) || path.resolve(common.DEFAULT_CONFIG_PATH, '..')
);
state._ipc = common.pipename(state.config, true);
console.info('');
console.info(verstr.join(' '));
if (!state.config.sock) {
console.info('(' + state._ipc.comment + ': "' + state._ipc.path + '")');
}
console.info('');
state.token = state.token || state.config.token || token;
state.pretoken = state.pretoken || state.config.pretoken;
state._confpath = confpath;
if (!state.config.servernames) {
state.config.servernames = {};
}
if (!state.config.ports) {
state.config.ports = {};
}
state.servernames = JSON.parse(JSON.stringify(state.config.servernames));
state.ports = JSON.parse(JSON.stringify(state.config.ports));
serveControls();
}
try {
state.config = JSON.parse(text || '{}');
} catch(e1) {
try {
state.config = YAML.safeLoad(text || '{}');
} catch(e2) {
console.error(e1.message);
console.error(e2.message);
process.exit(1);
return;
}
}
state.config = camelCopy(state.config || {}) || {};
run();
if ((err && 'ENOENT' === err.code) || !Object.keys(state.config).length) {
if (!err || 'ENOENT' === err.code) {
console.warn("Empty config file. Run 'telebit init' to configure.\n");
} else {
console.warn("Couldn't load config:\n\n\t" + err.message + "\n");
}
}
}
function approveDomains(opts, certs, cb) {
// Even though it's being tunneled by a trusted source
// we need to make sure we don't get rate-limit spammed
// with wildcard domains
// TODO: finish implementing dynamic dns for wildcard certs
if (getServername(state.servernames, opts.domains[0])) {
opts.email = state.greenlockConf.email || state.config.email;
opts.agreeTos = state.greenlockConf.agree || state.greenlockConf.agreeTos || state.config.agreeTos;
cb(null, { options: opts, certs: certs });
return;
}
cb(new Error("servername not found in allowed list"));
}
function greenlockHelper(state) {
// TODO Check undefined vs false for greenlock config
state.greenlockConf = state.config.greenlock || {};
state.greenlockConfig = {
version: state.greenlockConf.version || 'draft-11'
, server: state.greenlockConf.server || 'https://acme-v02.api.letsencrypt.org/directory'
, communityMember: state.greenlockConf.communityMember || state.config.communityMember
, _communityPackage: 'telebit.js'
, telemetry: state.greenlockConf.telemetry || state.config.telemetry
, configDir: state.greenlockConf.configDir
|| (state.config.root && path.join(state.config.root, 'etc/acme'))
|| path.join(os.homedir(), '.config/telebit/acme')
// TODO, store: require(state.greenlockConf.store.name || 'le-store-certbot').create(state.greenlockConf.store.options || {})
, approveDomains: approveDomains
};
state.insecure = state.config.relay_ignore_invalid_certificates;
}
function promiseTimeout(t) {
return new PromiseA(function (resolve) {
setTimeout(resolve, t);
});
}
var promiseWss = PromiseA.promisify(function (state, fn) {
return common.api.wss(state, fn);
});
var trPromise;
function safeStartTelebitRemote(forceOn) {
// whatever is currently going will not restart
state.keepAlive.state = false;
if (trPromise && !forceOn) { return trPromise; }
// if something is running, this will kill it
// (TODO option to use known-good active instead of restarting)
// this won't restart either
trPromise = rawStartTelebitRemote(state.keepAlive);
trPromise.then(function () {
console.log("[debug] success on raw start, keepAlive = true");
state.keepAlive.state = true;
trPromise = null;
}).catch(function () {
console.log("[debug] failure on raw start, { keepAlive = true }");
// this will restart
state.keepAlive = { state: true };
trPromise = rawStartTelebitRemote(state.keepAlive);
trPromise.then(function () {
console.log("[debug] success on 2nd start keepAlive:", state.keepAlive.state);
trPromise = null;
}).catch(function () {
console.log("[debug] failure on 2nd start. keepAlive", state.keepAlive.state);
trPromise = null;
});
});
return trPromise;
}
function rawStartTelebitRemote(keepAlive) {
var err;
var exiting = false;
var localRemote = myRemote;
myRemote = null;
if (localRemote) { /*console.log('DEBUG destroy() existing');*/ localRemote.destroy(); }
function safeReload(delay) {
if (exiting) {
// return a junk promise as the prior call
// already passed flow-control to the next promise
// (this is a second or delayed error or close event)
return PromiseA.resolve();
}
exiting = true;
// TODO state.keepAlive?
return promiseTimeout(delay).then(function () {
return rawStartTelebitRemote(keepAlive);
});
}
if (state.config.disable) {
//console.log('DEBUG disabled or incapable');
err = new Error("connecting is disabled");
err.code = 'EDISABLED';
return PromiseA.reject(err);
}
if (!(state.config.token || state.config.agreeTos)) {
//console.log('DEBUG Must agreeTos to generate preauth');
err = new Error("Must either supply token (for auth) or agreeTos (for preauth)");
err.code = 'ENOAGREE';
return PromiseA.reject(err);
}
state.relay = state.config.relay;
if (!state.relay) {
//console.log('DEBUG no relay');
err = new Error("'" + state._confpath + "' is missing 'relay'");
err.code = 'ENORELAY';
return PromiseA.reject(err);
}
// TODO: we need some form of pre-authorization before connecting,
// otherwise we'll get disconnected pretty quickly
if (!(state.token || state.pretoken)) {
//console.log('DEBUG no token');
err = new Error("no jwt token or preauthorization");
err.code = 'ENOAUTH';
return PromiseA.reject(err);
}
return PromiseA.resolve().then(function () {
//console.log('DEBUG rawStartTelebitRemote');
function startHelper() {
//console.log('DEBUG startHelper');
greenlockHelper(state);
// Saves the token
// state.handlers.access_token({ jwt: token });
// Adds the token to the connection
// tun.append(token);
//console.log("[DEBUG] token", typeof token, token);
//state.sortingHat = state.config.sortingHat;
// { relay, config, servernames, ports, sortingHat, net, insecure, token, handlers, greenlockConfig }
return new PromiseA(function (myResolve, myReject) {
function reject(err) {
if (myReject) {
myReject(err);
myResolve = null;
myReject = null;
} else {
//console.log('DEBUG double rejection');
}
}
function resolve(val) {
//console.log('[DEBUG] pre-resolve');
if (myResolve) {
myResolve(val);
myResolve = null;
myReject = null;
} else {
//console.log('DEBUG double resolution');
}
}
function onConnect() {
connectTimes.unshift(Date.now());
console.info('[connect] relay established');
myRemote.removeListener('error', onConnectError);
myRemote.once('error', function (err) {
console.log("[debug] Error after connect.");
console.log(err);
if (!keepAlive.state) {
reject(err);
return;
}
retryLoop();
});
resolve(myRemote);
return;
}
function onConnectError(err) {
myRemote = null;
if (handleError(err, 'onConnectError')) {
if (!keepAlive.state) {
reject(err);
return;
}
safeReload(10 * 1000).then(resolve).catch(reject);
return;
}
console.error('[Error] onConnectError: no retry (possibly bad auth):');
console.error(err);
reject(err);
return;
}
function retryLoop() {
console.warn('[Warn] disconnected. Will retry?', keepAlive.state);
if (keepAlive.state) {
safeReload(10 * 1000).then(resolve).catch(reject);
}
}
myRemote = TelebitRemote.createConnection({
relay: state.relay
, wss: state.wss
, config: state.config
, otp: state.otp
, sortingHat: state.config.sortingHat
, net: state.net
, insecure: state.insecure
, token: state.token || state.pretoken // instance
, servernames: state.servernames
, ports: state.ports
, handlers: state.handlers
, greenlockConfig: state.greenlockConfig
}, onConnect);
myRemote.once('error', onConnectError);
myRemote.once('close', retryLoop);
myRemote.on('grant', state.handlers.grant);
myRemote.on('access_token', state.handlers.access_token);
});
}
if (state.wss) {
return startHelper();
}
function handleError(err, prefix) {
// Likely causes:
// * DNS lookup failed (no Internet)
// * Rejected (bad authn)
if ('ENOTFOUND' === err.code) {
// DNS issue, probably network is disconnected
err.message = [
'[warn] (' + prefix + '): DNS address not found.'
, ' Either the remote does not exist or local network is down or blocked.'
, ' You might check wifi, eth, paywall, etc.'
].join('\n');
if (keepAlive.error !== err.code) {
console.warn(err.message);
keepAlive.error = err.code;
console.warn("(retrying silently)");
}
return true;
} else if ('ECONNREFUSED' === err.code) {
// Server issue. If it's the development server, it's probably down
err.message = [
'[warn] onConnectError: Connection Refused.'
, ' Either the remote does not exist or local network is blocking it.'
, ' Is the relay service provider\'s website up? Did you make a typo?'
, ' Is there a local firewall or paywall? Might the relay be otherwise blocked?'
].join('\n');
if (keepAlive.error !== err.code) {
console.warn(err.message);
keepAlive.error = err.code;
console.warn("(retrying silently)");
}
return true;
}
}
// get the wss url
function retryWssLoop(err) {
if (!keepAlive.state) {
console.log("[debug] error getting wss url:");
console.log(err);
return PromiseA.reject(err);
}
myRemote = null;
if (handleError(err, 'retryWssLoop')) {
// Always retry at this stage. It *is* a connectivity problem.
// Since the internet is disconnected, try again and again and again.
return safeReload(2 * 1000);
} else {
console.error("[error] retryWssLoop (will not retry):");
console.error(err.message);
return PromiseA.reject(err);
}
}
// It makes since for this to be in here because the server
// could be restarting to force a change of the metadata
return promiseWss(state).then(function (wss) {
state.wss = wss;
console.log("[debug] got wss url");
keepAlive.error = null;
return startHelper();
}).catch(retryWssLoop);
});
}
state.handlers = {
grant: function (grants) {
console.info("");
console.info("Connect to your device by any of the following means:");
console.info("");
grants.forEach(function (arr) {
if ('https' === arr[0]) {
if (!state.servernames[arr[1]]) {
state.servernames[arr[1]] = {};
}
state.servernames[arr[1]].wildcard = true;
} else if ('tcp' === arr[0]) {
if (!state.ports[arr[2]]) {
state.ports[arr[2]] = {};
}
}
if ('ssh+https' === arr[0]) {
console.info("SSH+HTTPS");
} else if ('ssh' === arr[0]) {
console.info("SSH");
} else if ('tcp' === arr[0]) {
console.info("TCP");
} else if ('https' === arr[0]) {
console.info("HTTPS");
}
console.info('\t' + arr[0] + '://' + arr[1] + (arr[2] ? (':' + arr[2]) : ''));
if ('ssh+https' === arr[0]) {
console.info("\tex: ssh -o ProxyCommand='openssl s_client -connect %h:%p -servername %h -quiet' " + arr[1] + " -p 443\n");
} else if ('ssh' === arr[0]) {
console.info("\tex: ssh " + arr[1] + " -p " + arr[2] + "\n");
} else if ('tcp' === arr[0]) {
console.info("\tex: netcat " + arr[1] + " " + arr[2] + "\n");
} else if ('https' === arr[0]) {
console.info("\tex: curl https://" + arr[1] + "\n");
}
});
}
, access_token: function (opts) {
if ('undefined' === opts.jwt || !opts.jwt) {
console.error("Granted empty access token... ??");
console.error(JSON.stringify(opts));
return;
}
state.token = opts.jwt || opts.access_token;
state.config.token = opts.jwt || opts.access_token;
console.info("Updating '" + tokenpath + "' with new token:");
try {
fs.writeFileSync(tokenpath, opts.jwt);
fs.writeFileSync(confpath, YAML.safeDump(snakeCopy(state.config)));
} catch (e) {
console.error("Token not saved:");
console.error(e);
}
}
};
function sigHandler() {
process.removeListener('SIGINT', sigHandler);
console.info('Received kill signal. Attempting to exit cleanly...');
state.keepAlive.state = false;
// We want to handle cleanup properly unless something is broken in our cleanup process
// that prevents us from exitting, in which case we want the user to be able to send
// the signal again and exit the way it normally would.
if (myRemote) {
myRemote.end();
myRemote = null;
}
if (controlServer) {
controlServer.close();
}
cancelUpdater();
}
// reverse 2FA otp
process.on('SIGINT', sigHandler);
state.net = state.net || {
createConnection: function (info, cb) {
// data is the hello packet / first chunk
// info = { data, servername, port, host, remoteFamily, remoteAddress, remotePort }
var net = require('net');
// socket = { write, push, end, events: [ 'readable', 'data', 'error', 'end' ] };
var socket = net.createConnection({ port: info.port, host: info.host }, cb);
return socket;
}
};
fs.readFile(confpath, 'utf8', parseConfig);
}());