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telebit.js/bin/telebit-remote.js

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#!/usr/bin/env node
(function () {
'use strict';
var pkg = require('../package.json');
var os = require('os');
//var url = require('url');
var path = require('path');
var http = require('http');
//var https = require('https');
var YAML = require('js-yaml');
var recase = require('recase').create({});
var camelCopy = recase.camelCopy.bind(recase);
//var snakeCopy = recase.snakeCopy.bind(recase);
var urequest = require('@coolaj86/urequest');
var common = require('../lib/cli-common.js');
var argv = process.argv.slice(2);
var argIndex = argv.indexOf('--config');
var confpath;
var useTty;
var state = {};
if (-1 === argIndex) {
argIndex = argv.indexOf('-c');
}
if (-1 !== argIndex) {
confpath = argv.splice(argIndex, 2)[1];
}
argIndex = argv.indexOf('--tty');
if (-1 !== argIndex) {
useTty = argv.splice(argIndex, 1);
}
function help() {
//console.info('');
//console.info('Telebit Remote v' + pkg.version);
console.info('');
console.info('Usage:');
console.info('');
console.info('\ttelebit [--config <path>] <module> <module-options>');
console.info('');
console.info('Examples:');
console.info('');
//console.info('\ttelebit init # bootstrap the config files');
//console.info('');
console.info('\ttelebit status # whether enabled or disabled');
console.info('\ttelebit enable # allow incoming connections');
console.info('\ttelebit disable # disallow incoming connections');
console.info('');
console.info('\ttelebit list # list rules for servernames and ports');
console.info('');
console.info('\ttelebit http none # remove all https handlers');
console.info('\ttelebit http 3000 # forward all https traffic to port 3000');
console.info('\ttelebit http /module/path # load a node module to handle all https traffic');
console.info('');
console.info('\ttelebit http none example.com # remove https handler from example.com');
console.info('\ttelebit http 3001 sub.example.com # forward https traffic for sub.example.com to port 3001');
console.info('\ttelebit http /module/path sub # forward https traffic for sub.example.com to port 3001');
console.info('');
console.info('\ttelebit tcp none # remove all tcp handlers');
console.info('\ttelebit tcp 5050 # forward all tcp to port 5050');
console.info('\ttelebit tcp /module/path # handle all tcp with a node module');
console.info('');
console.info('\ttelebit tcp none 6565 # remove tcp handler from external port 6565');
console.info('\ttelebit tcp 5050 6565 # forward external port 6565 to local 5050');
console.info('\ttelebit tcp /module/path 6565 # handle external port 6565 with a node module');
console.info('');
console.info('Config:');
console.info('');
console.info('\tSee https://git.coolaj86.com/coolaj86/telebit.js');
console.info('');
console.info('');
}
var verstr = [ pkg.name + ' remote v' + pkg.version ];
if (!confpath) {
confpath = path.join(os.homedir(), '.config/telebit/telebit.yml');
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);
}
function askForConfig(state, mainCb) {
var fs = require('fs');
var ttyname = '/dev/tty';
var stdin = useTty ? fs.createReadStream(ttyname, {
fd: fs.openSync(ttyname, fs.constants.O_RDONLY | fs.constants.O_NOCTTY)
}) : process.stdin;
var readline = require('readline');
var rl = readline.createInterface({
input: stdin
, output: process.stdout
// https://github.com/nodejs/node/issues/21771
// https://github.com/nodejs/node/issues/21319
, terminal: !/^win/i.test(os.platform()) && !useTty
});
state._useTty = useTty;
// NOTE: Use of setTimeout
// We're using setTimeout just to make the user experience a little
// nicer, as if we're doing something inbetween steps, so that it
// is a smooth rather than jerky experience.
// >= 300ms is long enough to become distracted and change focus (a full blink, time for an idea to form as a thought)
// <= 100ms is shorter than normal human reaction time (ability to place events chronologically, which happened first)
// ~ 150-250ms is the sweet spot for most humans (long enough to notice change and not be jarred, but stay on task)
var firstSet = [
function askEmail(cb) {
if (state.config.email) { cb(); return; }
//console.info("");
console.info("Welcome!");
console.info("");
console.info("By using Telebit you agree to:");
console.info("");
console.info(" [x] Accept the Telebit™ terms of service");
console.info(" [x] Accept the Let's Encrypt™ terms of service");
console.info("");
console.info("Enter your email to agree and login/create your account:");
console.info("");
// TODO attempt to read email from npmrc or the like?
rl.question('email: ', function (email) {
email = /@/.test(email) && email.trim();
if (!email) { askEmail(cb); return; }
state.config.email = email.trim();
state.config.agreeTos = true;
console.info("");
setTimeout(cb, 250);
});
}
, function askRelay(cb) {
function checkRelay(relay) {
// TODO parse and check https://{{relay}}/.well-known/telebit.cloud/directives.json
if (!relay) { relay = 'telebit.cloud'; }
relay = relay.trim();
var urlstr = common.parseUrl(relay) + common.apiDirectory;
urequest({ url: urlstr, json: true }, function (err, resp, body) {
if (err) {
console.error("[Network Error] Failed to retrieve '" + urlstr + "'");
console.error(err);
askRelay(cb);
return;
}
if (200 !== resp.statusCode || (Buffer.isBuffer(body) || 'object' !== typeof body) || !body.api_host) {
console.warn("===================");
console.warn(" WARNING ");
console.warn("===================");
console.warn("");
console.warn("[" + resp.statusCode + "] '" + urlstr + "'");
console.warn("This server does not describe a current telebit version (but it may still work).");
console.warn("");
console.warn(body);
} else if (body && body.pair_request) {
state._can_pair = true;
}
state.config.relay = relay;
cb();
});
}
if (state.config.relay) { checkRelay(state.config.relay); return; }
console.info("");
console.info("");
console.info("What relay will you be using? (press enter for default)");
console.info("");
rl.question('relay [default: telebit.cloud]: ', checkRelay);
}
, function checkRelay(cb) {
nextSet = [];
if ('telebit.cloud' !== state.config.relay) {
nextSet = nextSet.concat(standardSet);
}
if (!state._can_pair) {
nextSet = nextSet.concat(fossSet);
}
cb();
}
];
var standardSet = [
// There are questions that we need to aks in the CLI
// if we can't guarantee that they are being asked in the web interface
function askAgree(cb) {
if (state.config.agreeTos) { cb(); return; }
console.info("");
console.info("");
console.info("Do you accept the terms of service for each and all of the following?");
console.info("");
console.info("\tTelebit - End-to-End Encrypted Relay");
console.info("\tGreenlock - Automated HTTPS");
console.info("\tLet's Encrypt - TLS Certificates");
console.info("");
console.info("Type 'y' or 'yes' to accept these Terms of Service.");
console.info("");
rl.question('agree to all? [y/N]: ', function (resp) {
resp = resp.trim();
if (!/^y(es)?$/i.test(resp) && 'true' !== resp) {
throw new Error("You didn't accept the Terms of Service... not sure what to do...");
}
state.config.agreeTos = true;
console.info("");
setTimeout(cb, 250);
});
}
, function askUpdates(cb) {
// required means transactional, security alerts, mandatory updates
var options = [ 'newsletter', 'important', 'required' ];
if (-1 !== options.indexOf(state._updates)) { cb(); return; }
console.info("");
console.info("");
console.info("What updates would you like to receive? (" + options.join(',') + ")");
console.info("");
rl.question('messages (default: important): ', function (updates) {
state._updates = (updates || '').trim().toLowerCase();
if (!state._updates) { state._updates = 'important'; }
if (-1 === options.indexOf(state._updates)) { askUpdates(cb); return; }
if ('newsletter' === state._updates) {
state.config.newsletter = true;
state.config.communityMember = true;
} else if ('important' === state._updates) {
state.config.communityMember = true;
}
setTimeout(cb, 250);
});
}
, function askTelemetry(cb) {
if (state.config.telemetry) { cb(); return; }
console.info("");
console.info("");
console.info("Contribute project telemetry data? (press enter for default [yes])");
console.info("");
rl.question('telemetry [Y/n]: ', function (telemetry) {
if (!telemetry || /^y(es)?$/i.test(telemetry)) {
state.config.telemetry = true;
}
setTimeout(cb, 250);
});
}
];
var fossSet = [
function askTokenOrSecret(cb) {
if (state._can_pair || state.token || state.config.token
|| state.secret || state.config.secret) { cb(); return; }
console.info("");
console.info("");
console.info("What's your authorization for '" + state.config.relay + "'?");
console.info("");
// TODO check .well-known to learn supported token types
console.info("Currently supported:");
console.info("");
console.info("\tToken (JWT format)");
console.info("\tShared Secret (HMAC hex)");
//console.info("\tPrivate key (hex)");
console.info("");
rl.question('auth: ', function (resp) {
var jwt = require('jsonwebtoken');
resp = (resp || '').trim();
try {
jwt.decode(resp);
state.config.token = resp;
} catch(e) {
// is not jwt
}
if (!state.config.token) {
resp = resp.toLowerCase();
if (resp === Buffer.from(resp, 'hex').toString('hex')) {
state.config.secret = resp;
}
}
if (!state.config.token && !state.config.secret) {
askTokenOrSecret(cb);
return;
}
setTimeout(cb, 250);
});
}
, function askServernames(cb) {
if (!state.config.secret || state.config._servernames) { cb(); return; }
console.info("");
console.info("");
console.info("What servername(s) will you be relaying here?");
console.info("(use a comma-separated list such as example.com,example.net)");
console.info("");
rl.question('domain(s): ', function (resp) {
resp = (resp || '').trim().split(/,/g);
if (!resp.length) { askServernames(); return; }
// TODO validate the domains
state.config._servernames = resp;
setTimeout(cb, 250);
});
}
, function askPorts(cb) {
if (!state.config.secret || state.config._ports) { cb(); return; }
console.info("");
console.info("");
console.info("What tcp port(s) will you be relaying here?");
console.info("(use a comma-separated list such as 2222,5050)");
console.info("");
rl.question('port(s) [default:none]: ', function (resp) {
resp = (resp || '').trim().split(/,/g);
if (!resp.length) { askPorts(); return; }
// TODO validate the domains
state.config._ports = resp;
setTimeout(cb, 250);
});
}
];
var nextSet = firstSet;
function next() {
var q = nextSet.shift();
if (!q) {
// https://github.com/nodejs/node/issues/21319
if (useTty) { try { stdin.push(null); } catch(e) { /*ignore*/ } }
rl.close();
if (useTty) { try { stdin.close(); } catch(e) { /*ignore*/ } }
mainCb(null, state);
return;
}
q(next);
}
next();
}
var utils = {
request: function request(opts, fn) {
if (!opts) { opts = {}; }
var service = opts.service || 'config';
var req = http.request({
socketPath: state._ipc.path
, method: opts.method || 'GET'
, path: '/rpc/' + service
}, function (resp) {
var body = '';
function finish() {
if (200 !== resp.statusCode) {
console.warn(resp.statusCode);
console.warn(body || ('get' + service + ' failed'));
//cb(new Error("not okay"), body);
return;
}
if (!body) { fn(null, null); return; }
try {
body = JSON.parse(body);
} catch(e) {
// ignore
}
fn(null, body);
}
if (resp.headers['content-length']) {
resp.on('data', function (chunk) {
body += chunk.toString();
});
resp.on('end', function () {
finish();
});
} else {
finish();
}
});
req.on('error', function (err) {
// ENOENT - never started, cleanly exited last start, or creating socket at a different path
// ECONNREFUSED - leftover socket just needs to be restarted
if ('ENOENT' === err.code || 'ECONNREFUSED' === err.code) {
if (opts._taketwo) {
console.error("Either the telebit service was not already (and could not be started) or its socket could not be written to.");
console.error(err);
return;
}
require('../usr/share/install-launcher.js').install({ env: process.env }, function (err) {
if (err) { fn(err); return; }
opts._taketwo = true;
utils.request(opts, fn);
});
return;
}
if ('ENOTSOCK' === err.code) {
console.error(err);
return;
}
console.error(err);
return;
});
req.end();
}
, putConfig: function putConfig(service, args, fn) {
var req = http.request({
socketPath: state._ipc.path
, method: 'POST'
, path: '/rpc/' + service + '?_body=' + encodeURIComponent(JSON.stringify(args))
}, function (resp) {
function finish() {
if ('function' === typeof fn) {
fn(null, resp);
return;
}
console.info("");
if (200 !== resp.statusCode) {
console.warn("'" + service + "' may have failed."
+ " Consider peaking at the logs either with 'journalctl -xeu telebit' or /opt/telebit/var/log/error.log");
console.warn(resp.statusCode, body);
//cb(new Error("not okay"), body);
return;
}
if (!body) {
console.info("👌");
return;
}
try {
body = JSON.parse(body);
} catch(e) {
// ignore
}
if ("AWAIT_AUTH" === body.code) {
console.info(body.message);
} else if ("CONFIG" === body.code) {
delete body.code;
console.info(YAML.safeDump(body));
} else {
if ('http' === body.module) {
// TODO we'll support slingshot-ing in the future
if (String(body.local) === String(parseInt(body.local, 10))) {
console.info('> Forwarding https://' + body.remote + ' => localhost:' + body.local);
} else {
console.info('> Serving ' + body.local + ' as https://' + body.remote);
}
} else if ('tcp' === body.module) {
console.info('> Forwarding ' + state.config.relay + ':' + body.remote + ' => localhost:' + body.local);
} else if ('ssh' === body.module) {
console.info('> Forwarding ' + state.config.relay + ' -p ' + body.remote + ' => localhost:' + body.local);
console.info('> Forwarding ssh+https (openssl proxy) => localhost:' + body.local);
} else {
console.info(JSON.stringify(body, null, 2));
}
console.info();
}
}
var body = '';
if (resp.headers['content-length']) {
resp.on('data', function (chunk) {
body += chunk.toString();
});
resp.on('end', function () {
finish();
});
} else {
finish();
}
});
req.on('error', function (err) {
console.error('Put Config Error:');
console.error(err);
return;
});
req.end();
}
};
// Two styles:
// http 3000
// http modulename
function makeRpc(key) {
if (key !== argv[0]) {
return false;
}
utils.putConfig(argv[0], argv.slice(1));
return true;
}
function packConfig(config) {
return Object.keys(config).map(function (key) {
var val = config[key];
if ('undefined' === val) {
throw new Error("'undefined' used as a string value");
}
if ('undefined' === typeof val) {
//console.warn('[DEBUG]', key, 'is present but undefined');
return;
}
if (val && 'object' === typeof val && !Array.isArray(val)) {
val = JSON.stringify(val);
}
return key + ':' + val; // converts arrays to strings with ,
});
}
function getToken(err, state) {
if (err) {
console.error("Error while initializing config [init]:");
throw err;
}
state.relay = state.config.relay;
// { _otp, config: {} }
common.api.token(state, {
error: function (err/*, next*/) {
console.error("[Error] common.api.token:");
console.error(err);
return;
}
, directory: function (dir, next) {
//console.log('[directory] Telebit Relay Discovered:');
//console.log(dir);
state._apiDirectory = dir;
next();
}
, tunnelUrl: function (tunnelUrl, next) {
//console.log('[tunnelUrl] Telebit Relay Tunnel Socket:', tunnelUrl);
state.wss = tunnelUrl;
next();
}
, requested: function (authReq, next) {
//console.log("[requested] Pairing Requested");
state.config._otp = state.config._otp = authReq.otp;
if (!state.config.token && state._can_pair) {
console.info("");
console.info("==============================================");
console.info(" Hey, Listen! ");
console.info("==============================================");
console.info(" ");
console.info(" GO CHECK YOUR EMAIL! ");
console.info(" ");
console.info(" DEVICE PAIR CODE: 0000 ".replace(/0000/g, state.config._otp));
console.info(" ");
console.info("==============================================");
console.info("");
}
next();
}
, connect: function (pretoken, next) {
//console.log("[connect] Enabling Pairing Locally...");
state.config.pretoken = pretoken;
state._connecting = true;
// TODO use php-style object querification
utils.putConfig('config', packConfig(state.config), function (err/*, body*/) {
if (err) {
state._error = err;
console.error("Error while initializing config [connect]:");
console.error(err);
return;
}
console.info("waiting...");
next();
});
}
, offer: function (token, next) {
//console.log("[offer] Pairing Enabled by Relay");
state.config.token = token;
if (state._error) {
return;
}
state._connecting = true;
try {
require('jsonwebtoken').decode(token);
//console.log(require('jsonwebtoken').decode(token));
} catch(e) {
console.warn("[warning] could not decode token");
}
utils.putConfig('config', packConfig(state.config), function (err/*, body*/) {
if (err) {
state._error = err;
console.error("Error while initializing config [offer]:");
console.error(err);
return;
}
//console.log("Pairing Enabled Locally");
next();
});
}
, granted: function (_, next) {
//console.log("[grant] Pairing complete!");
next();
}
, end: function () {
utils.putConfig('enable', [], function (err) {
if (err) { console.error(err); return; }
console.info("Success");
// workaround for https://github.com/nodejs/node/issues/21319
if (state._useTty) {
setTimeout(function () {
console.info("Some fun things to try first:\n");
console.info(" ~/telebit http 3000");
console.info(" ~/telebit tcp 5050");
console.info(" ~/telebit ssh auto");
console.info();
console.info("Press any key to continue...");
console.info();
process.exit(0);
}, 0.5 * 1000);
return;
}
// end workaround
parseCli(state);
});
}
});
}
function parseCli(/*state*/) {
var special = [
'false', 'none', 'off', 'disable'
, 'true', 'auto', 'on', 'enable'
];
if (-1 !== argv.indexOf('init')) {
utils.putConfig('list', []/*, function (err) {
}*/);
return;
}
if ([ 'ssh', 'http', 'tcp' ].some(function (key) {
if (key !== argv[0]) {
return false;
}
if (argv[1]) {
if (String(argv[1]) === String(parseInt(argv[1], 10))) {
// looks like a port
argv[1] = parseInt(argv[1], 10);
} else if (/\/|\\/.test(argv[1])) {
// looks like a path
argv[1] = path.resolve(argv[1]);
// TODO make a default assignment here
} else if (-1 === special.indexOf(argv[1])) {
console.error("Not sure what you meant by '" + argv[1] + "'.");
console.error("Remember: paths should begin with ." + path.sep + ", like '." + path.sep + argv[1] + "'");
return true;
}
utils.putConfig(argv[0], argv.slice(1));
return true;
}
return true;
})) {
return;
}
if ([ 'status', 'enable', 'disable', 'restart', 'list', 'save' ].some(makeRpc)) {
return;
}
help();
process.exit(11);
}
function handleConfig(err, config) {
//console.log('CONFIG');
//console.log(config);
state.config = config;
var verstr = [ pkg.name + ' daemon v' + state.config.version ];
console.info(verstr.join(' '));
if (err) { console.error(err); process.exit(101); return; }
//
// check for init first, before anything else
// because it has arguments that may help in
// the next steps
//
if (-1 !== argv.indexOf('init')) {
parsers.init(argv, getToken);
return;
}
if (!state.config.relay || !state.config.token) {
if (!state.config.relay) {
state.config.relay = 'telebit.cloud';
}
//console.log("question the user?", Date.now());
askForConfig(state, function (err, state) {
// no errors actually get passed, so this is just future-proofing
if (err) { throw err; }
if (!state.config.token && state._can_pair) {
state.config._otp = common.otp();
}
//console.log("done questioning:", Date.now());
if (!state.token && !state.config.token) {
getToken(err, state);
} else {
parseCli(state);
}
});
return;
}
//console.log("no questioning:");
parseCli(state);
}
function parseConfig(err, text) {
console.info("");
console.info(verstr.join(' '));
try {
state._clientConfig = JSON.parse(text || '{}');
} catch(e1) {
try {
state._clientConfig = YAML.safeLoad(text || '{}');
} catch(e2) {
console.error(e1.message);
console.error(e2.message);
process.exit(1);
return;
}
}
state._clientConfig = camelCopy(state._clientConfig || {}) || {};
common._init(
// make a default working dir and log dir
state._clientConfig.root || path.join(os.homedir(), '.local/share/telebit')
, (state._clientConfig.root && path.join(state._clientConfig.root, 'etc'))
|| path.resolve(common.DEFAULT_CONFIG_PATH, '..')
);
state._ipc = common.pipename(state._clientConfig, true);
if (!Object.keys(state._clientConfig).length) {
console.info('(' + state._ipc.comment + ": " + state._ipc.path + ')');
console.info("");
}
if ((err && 'ENOENT' === err.code) || !Object.keys(state._clientConfig).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");
}
}
utils.request({ service: 'config' }, handleConfig);
}
var parsers = {
init: function (argv, parseCb) {
var answers = {};
var boolish = [ '--advanced' ];
if ('init' !== argv[0]) {
throw new Error("init must be the first argument");
}
argv.shift();
// init --foo bar
argv.forEach(function (arg, i) {
if (!/^--/.test(arg)) { return; }
if (-1 !== boolish.indexOf(arg)) {
answers['_' + arg.replace(/^--/, '')] = true;
}
if (/^-/.test(argv[i + 1])) {
throw new Error(argv[i + 1] + ' requires an argument');
}
answers[arg] = argv[i + 1];
});
// init foo:bar
argv.forEach(function (arg) {
if (/^--/.test(arg)) { return; }
var parts = arg.split(/:/g);
if (2 !== parts.length) {
throw new Error("bad option to init: '" + arg + "'");
}
if (answers[parts[0]]) {
throw new Error("duplicate key to init '" + parts[0] + "'");
}
answers[parts[0]] = parts[1];
});
if (answers.relay) {
console.info("using --relay " + answers.relay);
}
// things that aren't straight-forward copy-over
if (!answers.advanced && !answers.relay) {
answers.relay = 'telebit.cloud';
}
if (Array.isArray(common._NOTIFICATIONS[answers.update])) {
common._NOTIFICATIONS[answers.update].forEach(function (name) {
state.config[name] = true;
});
}
if (answers.servernames) {
state.config._servernames = answers.servernames;
}
if (answers.ports) {
state.config._ports = answers.ports;
}
// things that are straight-forward copy-over
common.CONFIG_KEYS.forEach(function (key) {
if ('true' === answers[key]) { answers[key] = true; }
if ('false' === answers[key]) { answers[key] = false; }
if ('null' === answers[key]) { answers[key] = null; }
if ('undefined' === answers[key]) { delete answers[key]; }
if ('undefined' !== typeof answers[key]) {
state.config[key] = answers[key];
}
});
askForConfig(state, function (err, state) {
if (err) { parseCb(err); return; }
if (!state.config.token && state._can_pair) {
state.config._otp = common.otp();
}
argv.unshift('init');
parseCb(null, state);
});
}
};
require('fs').readFile(confpath, 'utf8', parseConfig);
}());
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