mirror of
https://github.com/Ylianst/MeshCentral.git
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632 lines
38 KiB
JavaScript
632 lines
38 KiB
JavaScript
/**
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* @description MeshCentral Multi-Server Support
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* @author Ylian Saint-Hilaire
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* @copyright Intel Corporation 2018
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* @license Apache-2.0
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* @version v0.0.1
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*/
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// Construct a Mesh Multi-Server object. This is used for MeshCentral-to-MeshCentral communication.
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module.exports.CreateMultiServer = function (parent, args) {
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var obj = {};
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const WebSocket = require('ws');
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obj.parent = parent;
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obj.crypto = require('crypto');
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obj.peerConfig = parent.config.peers;
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obj.forge = require('node-forge');
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obj.outPeerServers = {}; // Outgoing peer servers
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obj.peerServers = {}; // All connected servers (in & out). Only present in this list if the connection is setup
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obj.serverid = null;
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// Create a mesh server module that will connect to other servers
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obj.CreatePeerOutServer = function (parent, serverid, url) {
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var obj = {};
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obj.parent = parent;
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obj.serverid = serverid;
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obj.url = url;
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obj.ws = null;
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obj.certificates = parent.parent.certificates;
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obj.common = require('./common.js');
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obj.forge = require('node-forge');
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obj.crypto = require('crypto');
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obj.connectionState = 0;
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obj.retryTimer = null;
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obj.retryBackoff = 0;
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obj.connectHandler = null;
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obj.webCertificateHash = obj.parent.parent.webserver.webCertificateHash;
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obj.agentCertificateHashBase64 = obj.parent.parent.webserver.agentCertificateHashBase64;
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obj.agentCertificateAsn1 = obj.parent.parent.webserver.agentCertificateAsn1;
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obj.peerServerId = null;
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obj.authenticated = 0;
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obj.serverCertHash = null;
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// Disconnect from the server and/or stop trying
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obj.stop = function () {
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obj.connectionState = 0;
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disconnect();
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}
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// Make one attempt at connecting to the server
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function connect() {
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obj.retryTimer = null;
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obj.connectionState = 1;
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// Get the web socket setup
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obj.ws = new WebSocket(obj.url + 'meshserver.ashx', { rejectUnauthorized: false, cert: obj.certificates.agent.cert, key: obj.certificates.agent.key });
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obj.parent.parent.debug(1, 'OutPeer ' + obj.serverid + ': Connecting to: ' + url + 'meshserver.ashx');
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// Register the connection failed event
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obj.ws.on('error', function (error) { obj.parent.parent.debug(1, 'OutPeer ' + obj.serverid + ': Error: ' + error); disconnect(); });
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obj.ws.on('close', function () { obj.parent.parent.debug(1, 'OutPeer ' + obj.serverid + ': Disconnected'); disconnect(); });
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// Register the connection event
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obj.ws.on('open', function () {
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obj.parent.parent.debug(1, 'OutPeer ' + obj.serverid + ': Connected');
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obj.connectionState |= 2;
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obj.nonce = obj.crypto.randomBytes(48).toString('binary');
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// Get the peer server's certificate and compute the server public key hash
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if (obj.ws._socket == null) return;
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var serverCert = obj.forge.pki.certificateFromAsn1(obj.forge.asn1.fromDer(obj.ws._socket.getPeerCertificate().raw.toString('binary')));
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obj.serverCertHash = obj.forge.pki.getPublicKeyFingerprint(serverCert.publicKey, { encoding: 'binary', md: obj.forge.md.sha384.create() });
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// Start authenticate the peer server by sending a auth nonce & server TLS cert hash.
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// Send 384 bits SHA384 hash of TLS cert public key + 384 bits nonce
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obj.ws.send(obj.common.ShortToStr(1) + obj.serverCertHash + obj.nonce); // Command 1, hash + nonce
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});
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// If a message is received
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obj.ws.on('message', function (msg) {
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if (typeof msg != 'string') { msg = msg.toString('binary'); }
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if (msg.length < 2) return;
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if (msg.charCodeAt(0) == 123) {
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if (obj.connectionState == 15) { processServerData(msg); }
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} else {
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var cmd = obj.common.ReadShort(msg, 0);
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switch (cmd) {
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case 1: {
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// Server authentication request
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if (msg.length != 98) { obj.parent.parent.debug(1, 'OutPeer: BAD MESSAGE(A1)'); return; }
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// Check that the server hash matches the TLS server certificate public key hash
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if (obj.serverCertHash != msg.substring(2, 50)) { obj.parent.parent.debug(1, 'OutPeer: Server hash mismatch.'); disconnect(); return; }
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obj.servernonce = msg.substring(50);
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// Perform the hash signature using the server agent certificate
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obj.parent.parent.certificateOperations.acceleratorPerformSignature(0, msg.substring(2) + obj.nonce, function (signature) {
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// Send back our certificate + signature
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obj.ws.send(obj.common.ShortToStr(2) + obj.common.ShortToStr(obj.agentCertificateAsn1.length) + obj.agentCertificateAsn1 + signature); // Command 2, certificate + signature
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});
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break;
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}
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case 2: {
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// Server certificate
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var certlen = obj.common.ReadShort(msg, 2), serverCert = null;
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var serverCertPem = '-----BEGIN CERTIFICATE-----\r\n' + new Buffer(msg.substring(4, 4 + certlen), 'binary').toString('base64') + '\r\n-----END CERTIFICATE-----';
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try { serverCert = obj.forge.pki.certificateFromAsn1(obj.forge.asn1.fromDer(msg.substring(4, 4 + certlen))); } catch (e) { }
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if (serverCert == null) { obj.parent.parent.debug(1, 'OutPeer: Invalid server certificate.'); disconnect(); return; }
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var serverid = new Buffer(obj.forge.pki.getPublicKeyFingerprint(serverCert.publicKey, { encoding: 'binary', md: obj.forge.md.sha384.create() }), 'binary').toString('base64').replace(/\+/g, '@').replace(/\//g, '$');
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if (serverid !== obj.agentCertificateHashBase64) { obj.parent.parent.debug(1, 'OutPeer: Server hash mismatch.'); disconnect(); return; }
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// Server signature, verify it. This is the fast way, without using forge. (TODO: Use accelerator for this?)
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const verify = obj.parent.crypto.createVerify('SHA384');
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verify.end(new Buffer(obj.serverCertHash + obj.nonce + obj.servernonce, 'binary'));
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if (verify.verify(serverCertPem, new Buffer(msg.substring(4 + certlen), 'binary')) !== true) { obj.parent.parent.debug(1, 'OutPeer: Server sign check failed.'); disconnect(); return; }
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// Connection is a success, clean up
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delete obj.nonce;
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delete obj.servernonce;
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obj.serverCertHash = new Buffer(obj.serverCertHash, 'binary').toString('base64').replace(/\+/g, '@').replace(/\//g, '$'); // Change this value to base64
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obj.connectionState |= 4;
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obj.retryBackoff = 0; // Set backoff connection timer back to fast.
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obj.parent.parent.debug(1, 'OutPeer ' + obj.serverid + ': Verified peer connection to ' + obj.url);
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// Send information about our server to the peer
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if (obj.connectionState == 15) { obj.ws.send(JSON.stringify({ action: 'info', serverid: obj.parent.serverid, dbid: obj.parent.parent.db.identifier, key: obj.parent.parent.serverKey.toString('hex'), serverCertHash: obj.parent.parent.webserver.webCertificateHashBase64 })); }
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//if ((obj.connectionState == 15) && (obj.connectHandler != null)) { obj.connectHandler(1); }
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break;
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}
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case 4: {
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// Server confirmed authentication, we are allowed to send commands to the server
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obj.connectionState |= 8;
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if (obj.connectionState == 15) { obj.ws.send(JSON.stringify({ action: 'info', serverid: obj.parent.serverid, dbid: obj.parent.parent.db.identifier, key: obj.parent.parent.serverKey.toString('hex'), serverCertHash: obj.parent.parent.webserver.webCertificateHashBase64 })); }
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//if ((obj.connectionState == 15) && (obj.connectHandler != null)) { obj.connectHandler(1); }
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break;
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}
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default: {
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obj.parent.parent.debug(1, 'OutPeer ' + obj.serverid + ': Un-handled command: ' + cmd);
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break;
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}
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}
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}
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});
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}
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// Disconnect from the server, if we need to, try again with a delay.
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function disconnect() {
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if (obj.authenticated == 3) { obj.parent.ClearPeerServer(obj, obj.peerServerId); obj.authenticated = 0; }
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if ((obj.connectionState == 15) && (obj.connectHandler != null)) { obj.connectHandler(0); }
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if (obj.ws != null) { obj.ws.close(); obj.ws = null; }
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if (obj.retryTimer != null) { clearTimeout(obj.retryTimer); obj.retryTimer = null; }
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// Re-try connection
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if (obj.connectionState >= 1) { obj.connectionState = 1; if (obj.retryTimer == null) { obj.retryTimer = setTimeout(connect, getConnectRetryTime()); } }
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}
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// Get the next retry time in milliseconds
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function getConnectRetryTime() {
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if (obj.retryBackoff < 30000) { obj.retryBackoff += Math.floor((Math.random() * 3000) + 1000); }
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return obj.retryBackoff;
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}
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// Send a JSON message to the peer server
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obj.send = function (msg) {
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try {
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if (obj.ws == null || obj.connectionState != 15) { return; }
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if (typeof msg == 'object') { obj.ws.send(JSON.stringify(msg)); return; }
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if (typeof msg == 'string') { obj.ws.send(msg); return; }
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} catch (e) { }
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}
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// Process incoming peer server JSON data
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function processServerData(msg) {
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var str = msg.toString('utf8');
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if (str[0] == '{') {
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try { command = JSON.parse(str) } catch (e) { obj.parent.parent.debug(1, 'Unable to parse server JSON (' + obj.remoteaddr + ').'); return; } // If the command can't be parsed, ignore it.
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if (command.action == 'info') {
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if (obj.authenticated != 3) {
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// We get the peer's serverid and database identifier.
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if ((command.serverid != null) && (command.dbid != null)) {
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if (command.serverid == obj.parent.serverid) { console.log('ERROR: Same server ID, trying to peer with self. (' + obj.url + ', ' + command.serverid + ').'); return; }
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if (command.dbid != obj.parent.parent.db.identifier) { console.log('ERROR: Database ID mismatch. Trying to peer to a server with the wrong database. (' + obj.url + ', ' + command.serverid + ').'); return; }
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if (obj.serverCertHash != command.serverCertHash) { console.log('ERROR: Outer certificate hash mismatch (2). (' + obj.url + ', ' + command.serverid + ').'); return; }
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obj.peerServerId = command.serverid;
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obj.peerServerKey = new Buffer(command.key, 'hex');
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obj.authenticated = 3;
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obj.parent.SetupPeerServer(obj, obj.peerServerId);
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}
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}
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} else if (obj.authenticated == 3) {
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// Pass the message to the parent object for processing.
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obj.parent.ProcessPeerServerMessage(obj, obj.peerServerId, command);
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}
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}
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}
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connect();
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return obj;
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}
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// Create a mesh server module that received a connection to another server
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obj.CreatePeerInServer = function (parent, ws, req) {
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var obj = {};
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obj.ws = ws;
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obj.parent = parent;
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obj.common = require('./common.js');
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obj.forge = require('node-forge');
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obj.crypto = require('crypto');
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obj.authenticated = 0;
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obj.remoteaddr = obj.ws._socket.remoteAddress;
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obj.receivedCommands = 0;
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obj.webCertificateHash = obj.parent.parent.webserver.webCertificateHash;
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obj.agentCertificateHashBase64 = obj.parent.parent.webserver.agentCertificateHashBase64;
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obj.agentCertificateAsn1 = obj.parent.parent.webserver.agentCertificateAsn1;
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obj.infoSent = 0;
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obj.peerServerId = null;
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obj.serverCertHash = null;
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if (obj.remoteaddr.startsWith('::ffff:')) { obj.remoteaddr = obj.remoteaddr.substring(7); }
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obj.parent.parent.debug(1, 'InPeer: Connected (' + obj.remoteaddr + ')');
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// Send a message to the peer server
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obj.send = function (data) {
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try {
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if (typeof data == 'string') { obj.ws.send(new Buffer(data, 'binary')); return; }
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if (typeof data == 'object') { obj.ws.send(JSON.stringify(data)); return; }
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obj.ws.send(data);
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} catch (e) { }
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}
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// Disconnect this server
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obj.close = function (arg) {
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if ((arg == 1) || (arg == null)) { try { obj.ws.close(); obj.parent.parent.debug(1, 'InPeer: Soft disconnect ' + obj.peerServerId + ' (' + obj.remoteaddr + ')'); } catch (e) { console.log(e); } } // Soft close, close the websocket
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if (arg == 2) { try { obj.ws._socket._parent.end(); obj.parent.parent.debug(1, 'InPeer: Hard disconnect ' + obj.peerServerId + ' (' + obj.remoteaddr + ')'); } catch (e) { console.log(e); } } // Hard close, close the TCP socket
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if (obj.authenticated == 3) { obj.parent.ClearPeerServer(obj, obj.peerServerId); obj.authenticated = 0; }
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}
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// When data is received from the peer server web socket
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ws.on('message', function (msg) {
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if (typeof msg != 'string') { msg = msg.toString('binary'); }
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if (msg.length < 2) return;
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if (obj.authenticated >= 2) { // We are authenticated
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if (msg.charCodeAt(0) == 123) { processServerData(msg); }
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if (msg.length < 2) return;
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var cmdid = obj.common.ReadShort(msg, 0);
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// Process binary commands (if any). None right now.
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}
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else if (obj.authenticated < 2) { // We are not authenticated
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var cmd = obj.common.ReadShort(msg, 0);
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if (cmd == 1) {
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// Peer server authentication request
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if ((msg.length != 98) || ((obj.receivedCommands & 1) != 0)) return;
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obj.receivedCommands += 1; // Peer server can't send the same command twice on the same connection ever. Block DOS attack path.
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// Check that the server hash matches out own web certificate hash
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if (obj.webCertificateHash != msg.substring(2, 50)) { obj.close(); return; }
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obj.peernonce = msg.substring(50);
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// Perform the hash signature using the server agent certificate
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obj.parent.parent.certificateOperations.acceleratorPerformSignature(0, msg.substring(2) + obj.nonce, function (signature) {
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// Send back our certificate + signature
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obj.send(obj.common.ShortToStr(2) + obj.common.ShortToStr(obj.agentCertificateAsn1.length) + obj.agentCertificateAsn1 + signature); // Command 2, certificate + signature
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});
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// Check the peer server signature if we can
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if (obj.unauthsign != null) {
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if (processPeerSignature(obj.unauthsign) == false) { disconnect(); return; } else { completePeerServerConnection(); }
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}
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}
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else if (cmd == 2) {
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// Peer server certificate
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if ((msg.length < 4) || ((obj.receivedCommands & 2) != 0)) { obj.parent.parent.debug(1, 'InPeer: Invalid command 2.'); return; }
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obj.receivedCommands += 2; // Peer server can't send the same command twice on the same connection ever. Block DOS attack path.
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// Decode the certificate
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var certlen = obj.common.ReadShort(msg, 2);
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obj.unauth = {};
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try { obj.unauth.nodeid = new Buffer(obj.forge.pki.getPublicKeyFingerprint(obj.forge.pki.certificateFromAsn1(obj.forge.asn1.fromDer(msg.substring(4, 4 + certlen))).publicKey, { encoding: 'binary', md: obj.forge.md.sha384.create() }), 'binary').toString('base64').replace(/\+/g, '@').replace(/\//g, '$'); } catch (e) { console.log(e); return; }
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obj.unauth.nodeCertPem = '-----BEGIN CERTIFICATE-----\r\n' + new Buffer(msg.substring(4, 4 + certlen), 'binary').toString('base64') + '\r\n-----END CERTIFICATE-----';
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// Check the peer server signature if we can
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if (obj.peernonce == null) {
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obj.unauthsign = msg.substring(4 + certlen);
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} else {
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if (processPeerSignature(msg.substring(4 + certlen)) == false) { obj.parent.parent.debug(1, 'InPeer: Invalid signature.'); obj.close(); return; }
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}
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completePeerServerConnection();
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}
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else if (cmd == 3) {
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if ((msg.length < 56) || ((obj.receivedCommands & 4) != 0)) { obj.parent.parent.debug(1, 'InPeer: Invalid command 3.'); return; }
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obj.receivedCommands += 4; // Peer server can't send the same command twice on the same connection ever. Block DOS attack path.
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completePeerServerConnection();
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}
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}
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});
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// If error, do nothing
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ws.on('error', function (err) { obj.parent.parent.debug(1, 'InPeer: Connection Error: ' + err); });
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// If the peer server web socket is closed, clean up.
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ws.on('close', function (req) { obj.parent.parent.debug(1, 'InPeer disconnect ' + obj.nodeid + ' (' + obj.remoteaddr + ')'); obj.close(0); });
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// obj.ws._socket._parent.on('close', function (req) { obj.parent.parent.debug(1, 'Peer server TCP disconnect ' + obj.nodeid + ' (' + obj.remoteaddr + ')'); });
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// Start authenticate the peer server by sending a auth nonce & server TLS cert hash.
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// Send 384 bits SHA382 hash of TLS cert public key + 384 bits nonce
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obj.nonce = obj.crypto.randomBytes(48).toString('binary');
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obj.send(obj.common.ShortToStr(1) + obj.webCertificateHash + obj.nonce); // Command 1, hash + nonce
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// Once we get all the information about an peer server, run this to hook everything up to the server
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function completePeerServerConnection() {
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if (obj.authenticated != 1) return;
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obj.send(obj.common.ShortToStr(4));
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obj.send(JSON.stringify({ action: 'info', serverid: obj.parent.serverid, dbid: obj.parent.parent.db.identifier, key: obj.parent.parent.serverKey.toString('hex'), serverCertHash: obj.parent.parent.webserver.webCertificateHashBase64 }));
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obj.authenticated = 2;
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}
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// Verify the peer server signature
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function processPeerSignature(msg) {
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// Verify the signature. This is the fast way, without using forge.
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const verify = obj.parent.crypto.createVerify('SHA384');
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verify.end(new Buffer(obj.parent.parent.webserver.webCertificateHash + obj.nonce + obj.peernonce, 'binary'));
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if (verify.verify(obj.unauth.nodeCertPem, new Buffer(msg, 'binary')) !== true) { console.log('Peer sign fail 1'); return false; }
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if (obj.unauth.nodeid !== obj.agentCertificateHashBase64) { console.log('Peer sign fail 2'); return false; }
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// Connection is a success, clean up
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obj.nodeid = obj.unauth.nodeid;
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delete obj.nonce;
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delete obj.peernonce;
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delete obj.unauth;
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if (obj.unauthsign) delete obj.unauthsign;
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obj.authenticated = 1;
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return true;
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}
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// Process incoming peer server JSON data
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function processServerData(msg) {
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var str = msg.toString('utf8');
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if (str[0] == '{') {
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try { command = JSON.parse(str) } catch (e) { obj.parent.parent.debug(1, 'Unable to parse server JSON (' + obj.remoteaddr + ').'); return; } // If the command can't be parsed, ignore it.
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if (command.action == 'info') {
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if (obj.authenticated != 3) {
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// We get the peer's serverid and database identifier.
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if ((command.serverid != null) && (command.dbid != null)) {
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if (command.serverid == obj.parent.serverid) { console.log('ERROR: Same server ID, trying to peer with self. (' + obj.remoteaddr + ', ' + command.serverid + ').'); return; }
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if (command.dbid != obj.parent.parent.db.identifier) { console.log('ERROR: Database ID mismatch. Trying to peer to a server with the wrong database. (' + obj.remoteaddr + ', ' + command.serverid + ').'); return; }
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if (obj.parent.peerConfig.servers[command.serverid] == null) { console.log('ERROR: Unknown peer serverid: ' + command.serverid + ' (' + obj.remoteaddr + ').'); return; }
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obj.peerServerId = command.serverid;
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obj.peerServerKey = new Buffer(command.key, 'hex');
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obj.serverCertHash = command.serverCertHash;
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obj.authenticated = 3;
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obj.parent.SetupPeerServer(obj, obj.peerServerId);
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}
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}
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} else if (obj.authenticated == 3) {
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// Pass the message to the parent object for processing.
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obj.parent.ProcessPeerServerMessage(obj, obj.peerServerId, command);
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}
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}
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}
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return obj;
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}
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// If we have no peering configuration, don't setup this object
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if (obj.peerConfig == null) { return null; }
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obj.serverid = obj.parent.config.peers.serverId;
|
|
if (obj.serverid == null) { obj.serverid = require("os").hostname().toLowerCase(); }
|
|
if (obj.parent.config.peers.servers[obj.serverid] == null) { console.log("Error: Unable to peer with other servers, \"" + obj.serverid + "\" not present in peer servers list."); return null; }
|
|
|
|
// Return the private key of a peer server
|
|
obj.getServerCookieKey = function (serverid) {
|
|
var server = obj.peerServers[serverid];
|
|
if (server && server.peerServerKey) return server.peerServerKey;
|
|
return null;
|
|
}
|
|
|
|
// Dispatch an event to all other MeshCentral2 peer servers
|
|
obj.DispatchEvent = function (ids, source, event) {
|
|
var busmsg = JSON.stringify({ action: 'bus', ids: ids, event: event });
|
|
for (var serverid in obj.peerServers) { obj.peerServers[serverid].send(busmsg); }
|
|
}
|
|
|
|
// Dispatch a message to other MeshCentral2 peer servers
|
|
obj.DispatchMessage = function (msg) {
|
|
for (var serverid in obj.peerServers) { obj.peerServers[serverid].send(msg); }
|
|
}
|
|
|
|
// Dispatch a message to other MeshCentral2 peer servers
|
|
obj.DispatchMessageSingleServer = function (msg, serverid) {
|
|
var server = obj.peerServers[serverid];
|
|
if (server != null) { server.send(msg); }
|
|
}
|
|
|
|
// Attempt to connect to all peers
|
|
obj.ConnectToPeers = function () {
|
|
for (serverId in obj.peerConfig.servers) {
|
|
// We will only connect to names that are larger then ours. This way, eveyone has one connection to everyone else (no cross-connections).
|
|
if ((serverId > obj.serverid) && (obj.peerConfig.servers[serverId].url != null) && (obj.outPeerServers[serverId] == null)) {
|
|
obj.outPeerServers[serverId] = obj.CreatePeerOutServer(obj, serverId, obj.peerConfig.servers[serverId].url);
|
|
}
|
|
}
|
|
}
|
|
|
|
// We connected to a peer server, setup everything
|
|
obj.SetupPeerServer = function (server, peerServerId) {
|
|
console.log('Connected to peer server ' + peerServerId + '.');
|
|
obj.peerServers[peerServerId] = server;
|
|
|
|
// Send the list of connections to the peer
|
|
server.send(JSON.stringify({ action: 'connectivityTable', connectivityTable: obj.parent.peerConnectivityByNode[obj.parent.serverId] }));
|
|
|
|
// Send a list of user sessions to the peer
|
|
server.send(JSON.stringify({ action: 'sessionsTable', sessionsTable: Object.keys(obj.parent.webserver.wssessions2) }));
|
|
}
|
|
|
|
// We disconnected to a peer server, clean up everything
|
|
obj.ClearPeerServer = function (server, peerServerId) {
|
|
console.log('Disconnected from peer server ' + peerServerId + '.');
|
|
|
|
// Clean up the connectivity state
|
|
delete obj.peerServers[peerServerId];
|
|
var oldList = obj.parent.peerConnectivityByNode[peerServerId];
|
|
obj.parent.peerConnectivityByNode[peerServerId] = {};
|
|
obj.parent.UpdateConnectivityState(oldList);
|
|
|
|
// Clean up the sessions list
|
|
for (var i in obj.parent.webserver.wsPeerSessions[peerServerId]) { delete obj.parent.webserver.wsPeerSessions2[obj.parent.webserver.wsPeerSessions[peerServerId][i]]; }
|
|
delete obj.parent.webserver.wsPeerSessions[peerServerId];
|
|
delete obj.parent.webserver.wsPeerSessions3[peerServerId];
|
|
obj.parent.webserver.recountSessions(); // Recount all sessions
|
|
}
|
|
|
|
// Process a message coming from a peer server
|
|
obj.ProcessPeerServerMessage = function (server, peerServerId, msg) {
|
|
//console.log('ProcessPeerServerMessage', peerServerId, msg);
|
|
switch (msg.action) {
|
|
case 'bus': {
|
|
obj.parent.DispatchEvent(msg.ids, null, msg.event, true); // Dispatch the peer event
|
|
break;
|
|
}
|
|
case 'connectivityTable': {
|
|
obj.parent.peerConnectivityByNode[peerServerId] = msg.connectivityTable;
|
|
obj.parent.UpdateConnectivityState(msg.connectivityTable);
|
|
break;
|
|
}
|
|
case 'sessionsTable': {
|
|
obj.parent.webserver.wsPeerSessions[peerServerId] = msg.sessionsTable;
|
|
var userToSession = {};
|
|
for (var i in msg.sessionsTable) {
|
|
var sessionid = msg.sessionsTable[i];
|
|
obj.parent.webserver.wsPeerSessions2[sessionid] = peerServerId;
|
|
var userid = sessionid.split('/').slice(0, 3).join('/'); // Take the sessionid and keep only the userid partion
|
|
if (userToSession[userid] == null) { userToSession[userid] = [sessionid]; } else { userToSession[userid].push(sessionid); } // UserId -> [ SessionId ]
|
|
}
|
|
obj.parent.webserver.wsPeerSessions3[peerServerId] = userToSession; // ServerId --> UserId --> SessionId
|
|
obj.parent.webserver.recountSessions(); // Recount all sessions
|
|
break;
|
|
}
|
|
case 'sessionStart': {
|
|
obj.parent.webserver.wsPeerSessions[peerServerId].push(msg.sessionid);
|
|
obj.parent.webserver.wsPeerSessions2[msg.sessionid] = peerServerId;
|
|
var userid = msg.sessionid.split('/').slice(0, 3).join('/');
|
|
if (obj.parent.webserver.wsPeerSessions3[peerServerId] == null) { obj.parent.webserver.wsPeerSessions3[peerServerId] = {}; }
|
|
if (obj.parent.webserver.wsPeerSessions3[peerServerId][userid] == null) { obj.parent.webserver.wsPeerSessions3[peerServerId][userid] = [ msg.sessionid ]; } else { obj.parent.webserver.wsPeerSessions3[peerServerId][userid].push(msg.sessionid); }
|
|
obj.parent.webserver.recountSessions(msg.sessionid); // Recount a specific user
|
|
break;
|
|
}
|
|
case 'sessionEnd': {
|
|
var i = obj.parent.webserver.wsPeerSessions[peerServerId].indexOf(msg.sessionid);
|
|
if (i >= 0) { obj.parent.webserver.wsPeerSessions[peerServerId].splice(i, 1); }
|
|
delete obj.parent.webserver.wsPeerSessions2[msg.sessionid];
|
|
var userid = msg.sessionid.split('/').slice(0, 3).join('/');
|
|
if (obj.parent.webserver.wsPeerSessions3[peerServerId][userid] != null) {
|
|
i = obj.parent.webserver.wsPeerSessions3[peerServerId][userid].indexOf(msg.sessionid);
|
|
if (i >= 0) {
|
|
obj.parent.webserver.wsPeerSessions3[peerServerId][userid].splice(i, 1);
|
|
if (obj.parent.webserver.wsPeerSessions3[peerServerId][userid].length == 0) { delete obj.parent.webserver.wsPeerSessions3[peerServerId][userid]; }
|
|
}
|
|
}
|
|
obj.parent.webserver.recountSessions(msg.sessionid); // Recount a specific user
|
|
break;
|
|
}
|
|
case 'SetConnectivityState': {
|
|
obj.parent.SetConnectivityState(msg.meshid, msg.nodeid, msg.connectTime, msg.connectType, msg.powerState, peerServerId);
|
|
break;
|
|
}
|
|
case 'ClearConnectivityState': {
|
|
obj.parent.ClearConnectivityState(msg.meshid, msg.nodeid, msg.connectType, peerServerId);
|
|
break;
|
|
}
|
|
case 'relay': {
|
|
// Check if there is a waiting session
|
|
var rsession = obj.parent.webserver.wsrelays[msg.id];
|
|
if (rsession != null) {
|
|
// Yes, there is a waiting session, see if we must initiate.
|
|
if (peerServerId > obj.parent.serverId) {
|
|
// We must initiate the connection to the peer
|
|
var userid = null;
|
|
if (rsession.peer1.req.session != null) { userid = rsession.peer1.req.session.userid; }
|
|
obj.createPeerRelay(rsession.peer1.ws, rsession.peer1.req, peerServerId, userid);
|
|
delete obj.parent.webserver.wsrelays[msg.id];
|
|
}
|
|
} else {
|
|
// Add this relay session to the peer relay list
|
|
obj.parent.webserver.wsPeerRelays[msg.id] = { serverId: peerServerId, time: Date.now() };
|
|
|
|
// Clear all relay sessions that are more than 1 minute
|
|
var oneMinuteAgo = Date.now() - 60000;
|
|
for (var id in obj.parent.webserver.wsPeerRelays) { if (obj.parent.webserver.wsPeerRelays[id].time < oneMinuteAgo) { delete obj.parent.webserver.wsPeerRelays[id]; } }
|
|
}
|
|
break;
|
|
}
|
|
case 'msg': {
|
|
if (msg.sessionid != null) {
|
|
// Route this message to a connected user session
|
|
if (command.fromNodeid != null) { command.nodeid = command.fromNodeid; delete command.fromNodeid; }
|
|
var ws = obj.parent.webserver.wssessions2[command.sessionid];
|
|
if (ws != null) { ws.send(JSON.stringify(command)); }
|
|
} else if (msg.nodeid != null) {
|
|
// Route this message to a connected agent
|
|
if (command.fromSessionid != null) { command.sessionid = command.fromSessionid; delete command.fromSessionid; }
|
|
var agent = obj.parent.webserver.wsagents[msg.nodeid];
|
|
if (agent != null) { delete msg.nodeid; agent.send(JSON.stringify(msg)); } // Remove the nodeid since it's implyed and send the message to the agent
|
|
} else if (msg.meshid != null) {
|
|
// Route this message to all users of this mesh
|
|
if (command.fromNodeid != null) { command.nodeid = command.fromNodeid; delete command.fromNodeid; }
|
|
var cmdstr = JSON.stringify(command);
|
|
for (var userid in obj.parent.webserver.wssessions) { // Find all connected users for this mesh and send the message
|
|
var user = obj.parent.webserver.users[userid];
|
|
if (user) {
|
|
var rights = user.links[msg.meshid];
|
|
if (rights != null) { // TODO: Look at what rights are needed for message routing
|
|
var sessions = obj.parent.webserver.wssessions[userid];
|
|
// Send the message to all users on this server
|
|
for (var i in sessions) { sessions[i].send(cmdstr); }
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Create a tunnel connection to a peer server
|
|
obj.createPeerRelay = function (ws, req, serverid, user) {
|
|
var server = obj.peerServers[serverid];
|
|
if ((server == null) || (server.peerServerKey == null)) { return null; }
|
|
var cookieKey = server.peerServerKey;
|
|
|
|
// Parse the user if needed
|
|
if (typeof user == 'string') { user = { _id: user, domain: user.split('/')[1] }; }
|
|
|
|
// Build the connection URL
|
|
var path = req.path;
|
|
if (path[0] == '/') path = path.substring(1);
|
|
if (path.substring(path.length - 11) == '/.websocket') { path = path.substring(0, path.length - 11); }
|
|
var queryStr = ''
|
|
for (var i in req.query) { queryStr += ((queryStr == '') ? '?' : '&') + i + '=' + req.query[i]; }
|
|
if (user != null) { queryStr += ((queryStr == '') ? '?' : '&') + 'auth=' + obj.parent.encodeCookie({ userid: user._id, domainid: user.domain }, cookieKey); }
|
|
var url = obj.peerConfig.servers[serverid].url + path + queryStr;
|
|
|
|
// Setup an connect the web socket
|
|
var tunnel = obj.createPeerRelayEx(ws, url, serverid);
|
|
tunnel.connect();
|
|
}
|
|
|
|
// Create a tunnel connection to a peer server
|
|
// We assume that "ws" is paused already.
|
|
obj.createPeerRelayEx = function (ws, url, serverid) {
|
|
var peerTunnel = { parent: obj, ws1: ws, ws2: null, url: url, serverid: serverid };
|
|
|
|
peerTunnel.connect = function () {
|
|
// Get the web socket setup
|
|
peerTunnel.parent.parent.debug(1, 'FTunnel ' + peerTunnel.serverid + ': Start connect to ' + peerTunnel.url);
|
|
peerTunnel.ws2 = new WebSocket(peerTunnel.url, { rejectUnauthorized: false });
|
|
|
|
// Register the connection failed event
|
|
peerTunnel.ws2.on('error', function (error) { peerTunnel.parent.parent.debug(1, 'FTunnel ' + obj.serverid + ': Connection error'); peerTunnel.close(); });
|
|
|
|
// If the peer server web socket is closed, clean up.
|
|
peerTunnel.ws2.on('close', function (req) { peerTunnel.parent.parent.debug(1, 'FTunnel disconnect ' + peerTunnel.serverid); peerTunnel.close(); });
|
|
|
|
// If a message is received from the peer, Peer ---> Browser (TODO: Pipe this?)
|
|
peerTunnel.ws2.on('message', function (msg) { try { peerTunnel.ws2.pause(); peerTunnel.ws1.send(msg, function () { peerTunnel.ws2.resume(); }); } catch (e) { } });
|
|
|
|
// Register the connection event
|
|
peerTunnel.ws2.on('open', function () {
|
|
peerTunnel.parent.parent.debug(1, 'FTunnel ' + peerTunnel.serverid + ': Connected');
|
|
|
|
// Get the peer server's certificate and compute the server public key hash
|
|
var serverCert = obj.forge.pki.certificateFromAsn1(obj.forge.asn1.fromDer(peerTunnel.ws2._socket.getPeerCertificate().raw.toString('binary')));
|
|
var serverCertHashHex = new Buffer(obj.forge.pki.getPublicKeyFingerprint(serverCert.publicKey, { encoding: 'binary', md: obj.forge.md.sha384.create() }), 'binary').toString('base64').replace(/\+/g, '@').replace(/\//g, '$');
|
|
|
|
// Check if the peer certificate is the expected one for this serverid
|
|
if (obj.peerServers[serverid] == null || obj.peerServers[serverid].serverCertHash != serverCertHashHex) { console.log('ERROR: Outer certificate hash mismatch (1). (' + peerTunnel.url + ', ' + peerTunnel.serverid + ').'); peerTunnel.close(); return; }
|
|
|
|
// Connection accepted, resume the web socket to start the data flow
|
|
peerTunnel.ws1.resume();
|
|
});
|
|
|
|
// If a message is received from the browser, Browser ---> Peer
|
|
peerTunnel.ws1.on('message', function (msg) { try { peerTunnel.ws1.pause(); peerTunnel.ws2.send(msg, function () { peerTunnel.ws1.resume(); }); } catch (e) { } });
|
|
|
|
// If error, do nothing
|
|
peerTunnel.ws1.on('error', function (err) { peerTunnel.close(); });
|
|
|
|
// If the web socket is closed, close the associated TCP connection.
|
|
peerTunnel.ws1.on('close', function (req) { peerTunnel.parent.parent.debug(1, 'FTunnel disconnect ' + peerTunnel.serverid); peerTunnel.close(); });
|
|
}
|
|
|
|
// Disconnect both sides of the tunnel
|
|
peerTunnel.close = function (arg) {
|
|
if (arg == 2) {
|
|
// Hard close, close the TCP socket
|
|
if (peerTunnel.ws1 != null) { try { peerTunnel.ws1._socket._parent.end(); peerTunnel.parent.parent.debug(1, 'FTunnel1: Hard disconnect'); } catch (e) { console.log(e); } }
|
|
if (peerTunnel.ws2 != null) { try { peerTunnel.ws2._socket._parent.end(); peerTunnel.parent.parent.debug(1, 'FTunnel2: Hard disconnect'); } catch (e) { console.log(e); } }
|
|
} else {
|
|
// Soft close, close the websocket
|
|
if (peerTunnel.ws1 != null) { try { peerTunnel.ws1.close(); peerTunnel.parent.parent.debug(1, 'FTunnel1: Soft disconnect '); } catch (e) { console.log(e); } }
|
|
if (peerTunnel.ws2 != null) { try { peerTunnel.ws2.close(); peerTunnel.parent.parent.debug(1, 'FTunnel2: Soft disconnect '); } catch (e) { console.log(e); } }
|
|
}
|
|
}
|
|
|
|
return peerTunnel;
|
|
}
|
|
|
|
setTimeout(function () { obj.ConnectToPeers(); }, 1000); // Delay this a little to make sure we are ready on our side.
|
|
return obj;
|
|
}
|