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@ -1,555 +1,16 @@ |
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'use strict'; |
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var url = require('url'); |
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var PromiseA = require('bluebird'); |
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var sni = require('sni'); |
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var Packer = require('proxy-packer'); |
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var PortServers = {}; |
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function timeoutPromise(duration) { |
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return new PromiseA(function (resolve) { |
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setTimeout(resolve, duration); |
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}); |
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var Packer = require('proxy-packer'); |
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var PromiseA; |
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try { |
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PromiseA = require('bluebird'); |
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} catch(e) { |
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PromiseA = global.Promise; |
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} |
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var Devices = require('./device-tracker'); |
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var pipeWs = require('./pipe-ws.js'); |
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var Server = { |
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_initCommandHandlers: function (state, srv) { |
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var commandHandlers = { |
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add_token: function addToken(newAuth) { |
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return Server.addToken(state, srv, newAuth); |
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} |
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, delete_token: function (token) { |
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return state.Promise.resolve(function () { |
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var err; |
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if (token !== '*') { |
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err = Server.removeToken(state, srv, token); |
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if (err) { return state.Promise.reject(err); } |
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} |
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Object.keys(srv.grants).some(function (jwtoken) { |
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err = Server.removeToken(state, srv, jwtoken); |
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return err; |
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}); |
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if (err) { return state.Promise.reject(err); } |
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return null; |
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}); |
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} |
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}; |
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commandHandlers.auth = commandHandlers.add_token; |
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commandHandlers.authn = commandHandlers.add_token; |
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commandHandlers.authz = commandHandlers.add_token; |
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srv._commandHandlers = commandHandlers; |
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} |
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, _initPackerHandlers: function (state, srv) { |
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var packerHandlers = { |
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oncontrol: function (tun) { |
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var cmd; |
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try { |
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cmd = JSON.parse(tun.data.toString()); |
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} catch (e) {} |
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if (!Array.isArray(cmd) || typeof cmd[0] !== 'number') { |
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var msg = 'received bad command "' + tun.data.toString() + '"'; |
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console.warn(msg, 'from websocket', srv.socketId); |
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Server.sendTunnelMsg(srv, null, [0, {message: msg, code: 'E_BAD_COMMAND'}], 'control'); |
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return; |
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} |
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if (cmd[0] < 0) { |
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// We only ever send one command and we send it once, so we just hard coded the ID as 1.
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if (cmd[0] === -1) { |
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if (cmd[1]) { |
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console.warn('received error response to hello from', srv.socketId, cmd[1]); |
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} |
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} |
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else { |
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console.warn('received response to unknown command', cmd, 'from', srv.socketId); |
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} |
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return; |
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} |
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if (cmd[0] === 0) { |
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console.warn('received dis-associated error from', srv.socketId, cmd[1]); |
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return; |
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} |
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function onSuccess() { |
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Server.sendTunnelMsg(srv, null, [-cmd[0], null], 'control'); |
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} |
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function onError(err) { |
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Server.sendTunnelMsg(srv, null, [-cmd[0], err], 'control'); |
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} |
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if (!srv._commandHandlers[cmd[1]]) { |
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onError({ message: 'unknown command "'+cmd[1]+'"', code: 'E_UNKNOWN_COMMAND' }); |
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return; |
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} |
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console.log('command:', cmd[1], cmd.slice(2)); |
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return srv._commandHandlers[cmd[1]].apply(null, cmd.slice(2)).then(onSuccess, onError); |
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} |
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, onconnection: function (tun) { |
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// I don't think this event can happen since this relay
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// is acting the part of the client, but just in case...
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// (in fact it should probably be explicitly disallowed)
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console.error("[SANITY FAIL] reverse connection start"); |
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} |
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, onmessage: function (tun) { |
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var cid = Packer.addrToId(tun); |
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if (state.debug) { console.log("remote '" + Server.logName(state, srv) + "' has data for '" + cid + "'", tun.data.byteLength); } |
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var browserConn = Server.getBrowserConn(state, srv, cid); |
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if (!browserConn) { |
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Server.sendTunnelMsg(srv, tun, {message: 'no matching connection', code: 'E_NO_CONN'}, 'error'); |
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return; |
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} |
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browserConn.write(tun.data); |
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// tunnelRead is how many bytes we've read from the tunnel, and written to the browser.
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browserConn.tunnelRead = (browserConn.tunnelRead || 0) + tun.data.byteLength; |
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// If we have more than 1MB buffered data we need to tell the other side to slow down.
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// Once we've finished sending what we have we can tell the other side to keep going.
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// If we've already sent the 'pause' message though don't send it again, because we're
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// probably just dealing with data queued before our message got to them.
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if (!browserConn.remotePaused && browserConn.bufferSize > 1024*1024) { |
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Server.sendTunnelMsg(srv, tun, browserConn.tunnelRead, 'pause'); |
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browserConn.remotePaused = true; |
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browserConn.once('drain', function () { |
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Server.sendTunnelMsg(srv, tun, browserConn.tunnelRead, 'resume'); |
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browserConn.remotePaused = false; |
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}); |
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} |
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} |
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, onpause: function (tun) { |
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var cid = Packer.addrToId(tun); |
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console.log('[TunnelPause]', cid); |
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var browserConn = Server.getBrowserConn(state, srv, cid); |
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if (browserConn) { |
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browserConn.manualPause = true; |
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browserConn.pause(); |
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} else { |
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Server.sendTunnelMsg(srv, tun, {message: 'no matching connection', code: 'E_NO_CONN'}, 'error'); |
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} |
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} |
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, onresume: function (tun) { |
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var cid = Packer.addrToId(tun); |
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console.log('[TunnelResume]', cid); |
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var browserConn = Server.getBrowserConn(state, srv, cid); |
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if (browserConn) { |
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browserConn.manualPause = false; |
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browserConn.resume(); |
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} else { |
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Server.sendTunnelMsg(srv, tun, {message: 'no matching connection', code: 'E_NO_CONN'}, 'error'); |
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} |
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} |
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, onend: function (tun) { |
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var cid = Packer.addrToId(tun); |
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console.log('[TunnelEnd]', cid); |
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Server.closeBrowserConn(state, srv, cid); |
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} |
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, onerror: function (tun) { |
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var cid = Packer.addrToId(tun); |
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console.warn('[TunnelError]', cid, tun.message); |
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Server.closeBrowserConn(state, srv, cid); |
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} |
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}; |
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srv._packerHandlers = packerHandlers; |
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srv.unpacker = Packer.create(srv._packerHandlers); |
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} |
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, _initSocketHandlers: function (state, srv) { |
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function refreshTimeout() { |
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srv.lastActivity = Date.now(); |
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} |
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function checkTimeout() { |
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// Determine how long the connection has been "silent", ie no activity.
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var silent = Date.now() - srv.lastActivity; |
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// If we have had activity within the last activityTimeout then all we need to do is
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// call this function again at the soonest time when the connection could be timed out.
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if (silent < state.activityTimeout) { |
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srv.timeoutId = setTimeout(checkTimeout, state.activityTimeout - silent); |
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} |
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// Otherwise we check to see if the pong has also timed out, and if not we send a ping
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// and call this function again when the pong will have timed out.
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else if (silent < state.activityTimeout + state.pongTimeout) { |
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if (state.debug) { console.log('pinging', Server.logName(state, srv)); } |
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try { |
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srv.ws.ping(); |
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} catch (err) { |
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console.warn('failed to ping home cloud', Server.logName(state, srv)); |
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} |
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srv.timeoutId = setTimeout(checkTimeout, state.pongTimeout); |
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} |
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// Last case means the ping we sent before didn't get a response soon enough, so we
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// need to close the websocket connection.
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else { |
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console.warn('home cloud', Server.logName(state, srv), 'connection timed out'); |
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srv.ws.close(1013, 'connection timeout'); |
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} |
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} |
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function forwardMessage(chunk) { |
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refreshTimeout(); |
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if (state.debug) { console.log('[ws] device => client : demultiplexing message ', chunk.byteLength, 'bytes'); } |
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//console.log(chunk.toString());
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srv.unpacker.fns.addChunk(chunk); |
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} |
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function hangup() { |
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clearTimeout(srv.timeoutId); |
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console.log('[ws] device hangup', Server.logName(state, srv), 'connection closing'); |
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// remove the allowed domains from the list (but leave the socket)
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Object.keys(srv.grants).forEach(function (jwtoken) { |
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Server.removeToken(state, srv, jwtoken); |
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}); |
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srv.ws.terminate(); |
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// remove the socket from the list, period
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Devices.close(state.deviceLists, srv); |
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} |
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srv.lastActivity = Date.now(); |
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srv.timeoutId = null; |
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srv.timeoutId = setTimeout(checkTimeout, state.activityTimeout); |
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// Note that our websocket library automatically handles pong responses on ping requests
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// before it even emits the event.
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srv.ws.on('ping', refreshTimeout); |
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srv.ws.on('pong', refreshTimeout); |
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srv.ws.on('message', forwardMessage); |
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srv.ws.on('close', hangup); |
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srv.ws.on('error', hangup); |
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} |
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, init: function init(state, srv) { |
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Server._initCommandHandlers(state, srv); |
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Server._initPackerHandlers(state, srv); |
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Server._initSocketHandlers(state, srv); |
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// Status Code '1' for Status 'hello'
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Server.sendTunnelMsg(srv, null, [1, 'hello', [srv.unpacker._version], Object.keys(srv._commandHandlers)], 'control'); |
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} |
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, sendTunnelMsg: function sendTunnelMsg(srv, addr, data, service) { |
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if (data && !Buffer.isBuffer()) { |
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data = Buffer.from(JSON.stringify(data)); |
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} |
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srv.ws.send(Packer.packHeader(addr, data, service), {binary: true}); |
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srv.ws.send(data, {binary: true}); |
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} |
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, logName: function logName(state, srv) { |
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var result = Object.keys(srv.grants).map(function (jwtoken) { |
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return srv.grants[jwtoken].currentDesc; |
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}).join(';'); |
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return result || srv.socketId; |
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} |
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, onAuth: function onAuth(state, srv, newAuth, grant) { |
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console.log('\n[relay.js] onAuth'); |
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console.log(newAuth); |
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console.log(grant); |
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//var stringauth;
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var err; |
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if (!grant || 'object' !== typeof grant) { |
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console.log('[relay.js] invalid token', grant); |
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err = new Error("invalid access token"); |
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err.code = "E_INVALID_TOKEN"; |
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return state.Promise.reject(err); |
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} |
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if ('string' !== typeof newAuth) { |
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newAuth = JSON.stringify(newAuth); |
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} |
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console.log('check for upgrade token'); |
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if (grant.jwt && newAuth !== grant.jwt) { |
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console.log('new token to send back'); |
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// Access Token
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Server.sendTunnelMsg( |
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srv |
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, null |
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, [ 3 |
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, 'access_token' |
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, { jwt: grant.jwt } |
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] |
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, 'control' |
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); |
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// these aren't needed internally once they're sent
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grant.jwt = null; |
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} |
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/* |
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if (!Array.isArray(grant.domains) || !grant.domains.length) { |
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err = new Error("invalid domains array"); |
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err.code = "E_INVALID_NAME"; |
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return state.Promise.reject(err); |
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} |
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*/ |
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if (grant.domains.some(function (name) { return typeof name !== 'string'; })) { |
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console.log('bad domain names'); |
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err = new Error("invalid domain name(s)"); |
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err.code = "E_INVALID_NAME"; |
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return state.Promise.reject(err); |
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} |
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console.log('strolling through pleasantries'); |
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// Add the custom properties we need to manage this remote, then add it to all the relevant
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// domains and the list of all this websocket's grants.
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grant.domains.forEach(function (domainname) { |
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console.log('add', domainname, 'to device lists'); |
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srv.domainsMap[domainname] = true; |
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Devices.add(state.deviceLists, domainname, srv); |
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}); |
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srv.domains = Object.keys(srv.domainsMap); |
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srv.currentDesc = (grant.device && (grant.device.id || grant.device.hostname)) || srv.domains.join(','); |
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grant.currentDesc = (grant.device && (grant.device.id || grant.device.hostname)) || grant.domains.join(','); |
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grant.srv = srv; |
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//grant.ws = srv.ws;
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//grant.upgradeReq = srv.upgradeReq;
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grant.clients = {}; |
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if (!grant.ports) { grant.ports = []; } |
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function openPort(serviceport) { |
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function tcpListener(conn) { |
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Server.onDynTcpConn(state, srv, srv.portsMap[serviceport], conn); |
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} |
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serviceport = parseInt(serviceport, 10) || 0; |
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if (!serviceport) { |
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// TODO error message about bad port
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return; |
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} |
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if (PortServers[serviceport]) { |
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console.log('reuse', serviceport, 'for this connection'); |
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//grant.ports = [];
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srv.portsMap[serviceport] = PortServers[serviceport]; |
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srv.portsMap[serviceport].on('connection', tcpListener); |
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srv.portsMap[serviceport].tcpListener = tcpListener; |
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Devices.add(state.deviceLists, serviceport, srv); |
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} else { |
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try { |
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console.log('use new', serviceport, 'for this connection'); |
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srv.portsMap[serviceport] = PortServers[serviceport] = require('net').createServer(tcpListener); |
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srv.portsMap[serviceport].tcpListener = tcpListener; |
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srv.portsMap[serviceport].listen(serviceport, function () { |
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console.info('[DynTcpConn] Port', serviceport, 'now open for', grant.currentDesc); |
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Devices.add(state.deviceLists, serviceport, srv); |
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}); |
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srv.portsMap[serviceport].on('error', function (e) { |
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// TODO try again with random port
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console.error("Server Error assigning a dynamic port to a new connection:", e); |
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}); |
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} catch(e) { |
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// what a wonderful problem it will be the day that this bug needs to be fixed
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// (i.e. there are enough users to run out of ports)
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console.error("Error assigning a dynamic port to a new connection:", e); |
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} |
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} |
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} |
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grant.ports.forEach(openPort); |
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srv.grants[newAuth] = grant; |
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console.info("[ws] authorized", srv.socketId, "for", grant.currentDesc); |
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console.log('notify of grants', grant.domains, grant.ports); |
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Server.sendTunnelMsg( |
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srv |
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, null |
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, [ 2 |
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, 'grant' |
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, [ ['ssh+https', grant.domains[0], 443 ] |
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, ['ssh', 'ssh.' + state.config.sharedDomain, grant.ports ] |
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, ['tcp', 'tcp.' + state.config.sharedDomain, grant.ports ] |
|
|
|
, ['https', grant.domains[0] ] |
|
|
|
] |
|
|
|
] |
|
|
|
, 'control' |
|
|
|
); |
|
|
|
return null; |
|
|
|
} |
|
|
|
, onDynTcpConn: function onDynTcpConn(state, srv, server, conn) { |
|
|
|
var serviceport = server.address().port; |
|
|
|
console.log('[DynTcpConn] new connection on', serviceport); |
|
|
|
var nextDevice = Devices.next(state.deviceLists, serviceport); |
|
|
|
|
|
|
|
if (!nextDevice) { |
|
|
|
conn.write("[Sanity Error] I've got a blank space baby, but nowhere to write your name."); |
|
|
|
conn.end(); |
|
|
|
try { |
|
|
|
server.close(); |
|
|
|
} catch(e) { |
|
|
|
console.error("[DynTcpConn] failed to close server:", e); |
|
|
|
} |
|
|
|
return; |
|
|
|
} |
|
|
|
|
|
|
|
// When using raw TCP we're already paired to the client by port
|
|
|
|
// and we can begin connecting right away, but we'll wait just a sec
|
|
|
|
// to reject known bad connections
|
|
|
|
var sendConnection = setTimeout(function () { |
|
|
|
conn.removeListener('data', peekFirstPacket) |
|
|
|
console.log("[debug tcp conn] Connecting possible telnet client to device..."); |
|
|
|
pipeWs(null, 'tcp', nextDevice, conn, serviceport); |
|
|
|
}, 350); |
|
|
|
function peekFirstPacket(firstChunk) { |
|
|
|
clearTimeout(sendConnection); |
|
|
|
if (state.debug) { console.log("[DynTcp]", serviceport, "examining firstChunk from", Packer.socketToId(conn)); } |
|
|
|
conn.pause(); |
|
|
|
//conn.unshift(firstChunk);
|
|
|
|
conn._handle.onread(firstChunk.length, firstChunk); |
|
|
|
|
|
|
|
var servername; |
|
|
|
var hostname; |
|
|
|
var str; |
|
|
|
var m; |
|
|
|
|
|
|
|
if (22 === firstChunk[0]) { |
|
|
|
servername = (sni(firstChunk)||'').toLowerCase(); |
|
|
|
} else if (firstChunk[0] > 32 && firstChunk[0] < 127) { |
|
|
|
str = firstChunk.toString(); |
|
|
|
m = str.match(/(?:^|[\r\n])Host: ([^\r\n]+)[\r\n]*/im); |
|
|
|
hostname = (m && m[1].toLowerCase() || '').split(':')[0]; |
|
|
|
} |
|
|
|
|
|
|
|
if (servername || hostname) { |
|
|
|
if (servername) { |
|
|
|
conn.write("TLS with sni is allowed only on standard ports. If you've registered '" + servername + "' use port 443."); |
|
|
|
} else { |
|
|
|
conn.write("HTTP with Host headers is not allowed on dynamic ports. If you've registered '" + hostname + "' use port 80."); |
|
|
|
} |
|
|
|
conn.end(); |
|
|
|
return; |
|
|
|
} |
|
|
|
|
|
|
|
// pipeWs(servername, servicename, srv, client, serviceport)
|
|
|
|
// remote.clients is managed as part of the piping process
|
|
|
|
if (state.debug) { console.log("[DynTcp]", serviceport, "piping to srv (via loadbal)"); } |
|
|
|
pipeWs(null, 'tcp', nextDevice, conn, serviceport); |
|
|
|
|
|
|
|
process.nextTick(function () { conn.resume(); }); |
|
|
|
} |
|
|
|
conn.once('data', peekFirstPacket); |
|
|
|
} |
|
|
|
, addToken: function addToken(state, srv, newAuth) { |
|
|
|
console.log("addToken", newAuth); |
|
|
|
if (srv.grants[newAuth]) { |
|
|
|
console.log("addToken - duplicate"); |
|
|
|
// return { message: "token sent multiple times", code: "E_TOKEN_REPEAT" };
|
|
|
|
return state.Promise.resolve(null); |
|
|
|
} |
|
|
|
|
|
|
|
return state.authenticate({ auth: newAuth }).then(function (authnToken) { |
|
|
|
|
|
|
|
console.log('\n[relay.js] newAuth'); |
|
|
|
console.log(newAuth); |
|
|
|
|
|
|
|
console.log('\n[relay.js] authnToken'); |
|
|
|
console.log(authnToken); |
|
|
|
|
|
|
|
if (authnToken.id) { |
|
|
|
state.srvs[authnToken.id] = state.srvs[authnToken.id] || {}; |
|
|
|
state.srvs[authnToken.id].updateAuth = function (validToken) { |
|
|
|
return Server.onAuth(state, srv, newAuth, validToken); |
|
|
|
}; |
|
|
|
} |
|
|
|
|
|
|
|
// will return rejection if necessary
|
|
|
|
return state.srvs[authnToken.id].updateAuth(authnToken); |
|
|
|
}); |
|
|
|
} |
|
|
|
, removeToken: function removeToken(state, srv, jwtoken) { |
|
|
|
var grant = srv.grants[jwtoken]; |
|
|
|
if (!grant) { |
|
|
|
return { message: 'specified token not present', code: 'E_INVALID_TOKEN'}; |
|
|
|
} |
|
|
|
|
|
|
|
// Prevent any more browser connections for this grant being sent to this srv,
|
|
|
|
// and any existing connections from trying to send more data across the connection.
|
|
|
|
grant.domains.forEach(function (domainname) { |
|
|
|
Devices.remove(state.deviceLists, domainname, srv); |
|
|
|
}); |
|
|
|
grant.ports.forEach(function (portnumber) { |
|
|
|
Devices.remove(state.deviceLists, portnumber, srv); |
|
|
|
if (!srv.portsMap[portnumber]) { return; } |
|
|
|
try { |
|
|
|
srv.portsMap[portnumber].close(function () { |
|
|
|
console.log("[DynTcpConn] closing server for ", portnumber); |
|
|
|
delete srv.portsMap[portnumber]; |
|
|
|
delete PortServers[portnumber]; |
|
|
|
}); |
|
|
|
} catch(e) { /*ignore*/ } |
|
|
|
}); |
|
|
|
|
|
|
|
// Close all of the existing browser connections associated with this websocket connection.
|
|
|
|
Object.keys(grant.clients).forEach(function (cid) { |
|
|
|
Server.closeBrowserConn(state, srv, cid); |
|
|
|
}); |
|
|
|
delete srv.grants[jwtoken]; |
|
|
|
console.log("[ws] removed token '" + grant.currentDesc + "' from", srv.socketId); |
|
|
|
return null; |
|
|
|
} |
|
|
|
, getBrowserConn: function getBrowserConn(state, srv, cid) { |
|
|
|
return srv.clients[cid]; |
|
|
|
} |
|
|
|
, closeBrowserConn: function closeBrowserConn(state, srv, cid) { |
|
|
|
if (!srv.clients[cid]) { |
|
|
|
return; |
|
|
|
} |
|
|
|
|
|
|
|
PromiseA.resolve().then(function () { |
|
|
|
var conn = srv.clients[cid]; |
|
|
|
conn.tunnelClosing = true; |
|
|
|
conn.end(); |
|
|
|
|
|
|
|
// If no data is buffered for writing then we don't need to wait for it to drain.
|
|
|
|
if (!conn.bufferSize) { |
|
|
|
return timeoutPromise(500); |
|
|
|
} |
|
|
|
// Otherwise we want the connection to be able to finish, but we also want to impose
|
|
|
|
// a time limit for it to drain, since it shouldn't have more than 1MB buffered.
|
|
|
|
return new PromiseA(function (resolve) { |
|
|
|
var timeoutId = setTimeout(resolve, 60*1000); |
|
|
|
conn.once('drain', function () { |
|
|
|
clearTimeout(timeoutId); |
|
|
|
setTimeout(resolve, 500); |
|
|
|
}); |
|
|
|
}); |
|
|
|
}).then(function () { |
|
|
|
if (srv.clients[cid]) { |
|
|
|
console.warn(cid, 'browser connection still present after calling `end`'); |
|
|
|
srv.clients[cid].destroy(); |
|
|
|
return timeoutPromise(500); |
|
|
|
} |
|
|
|
}).then(function () { |
|
|
|
if (srv.clients[cid]) { |
|
|
|
console.error(cid, 'browser connection still present after calling `destroy`'); |
|
|
|
delete srv.clients[cid]; |
|
|
|
} |
|
|
|
}).catch(function (err) { |
|
|
|
console.warn('failed to close browser connection', cid, err); |
|
|
|
}); |
|
|
|
} |
|
|
|
, parseAuth: function parseAuth(state, srv) { |
|
|
|
var authn = (srv.upgradeReq.headers.authorization||'').split(/\s+/); |
|
|
|
if (authn[0] && 'basic' === authn[0].toLowerCase()) { |
|
|
|
try { |
|
|
|
authn = new Buffer(authn[1], 'base64').toString('ascii').split(':'); |
|
|
|
return authn[1]; |
|
|
|
} catch (err) { } |
|
|
|
} |
|
|
|
return url.parse(srv.upgradeReq.url, true).query.access_token; |
|
|
|
} |
|
|
|
}; |
|
|
|
var Server = require('./server.js'); |
|
|
|
|
|
|
|
module.exports.store = { Devices: Devices }; |
|
|
|
module.exports.create = function (state) { |
|
|
|
@ -588,6 +49,8 @@ module.exports.create = function (state) { |
|
|
|
srv.domainsMap = {}; |
|
|
|
srv.portsMap = {}; |
|
|
|
srv.pausedConns = []; |
|
|
|
srv.domains = []; |
|
|
|
srv.ports = []; |
|
|
|
|
|
|
|
if (state.debug) { console.log('[ws] connection', srv.socketId); } |
|
|
|
|
|
|
|
|
