mirror of
https://github.com/Ylianst/MeshCentral.git
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Web relay improvements, #4240
This commit is contained in:
Ylian Saint-Hilaire
parent
3b16b51b08
commit
9dac8b7807
3 changed files with 95 additions and 80 deletions
33
apprelays.js
33
apprelays.js
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@ -84,6 +84,8 @@ module.exports.CreateWebRelaySession = function (parent, db, req, args, domain,
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var tunnels = {};
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var errorCount = 0; // If we keep closing tunnels without processing requests, fail the requests
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parent.parent.debug('webrelay', 'CreateWebRelaySession, userid:' + userid + ', addr:' + addr + ', port:' + port);
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// Any HTTP cookie set by the device is going to be shared between all tunnels to that device.
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obj.webCookies = {};
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@ -110,12 +112,14 @@ module.exports.CreateWebRelaySession = function (parent, db, req, args, domain,
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// Handle new HTTP request
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obj.handleRequest = function (req, res) {
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parent.parent.debug('webrelay', 'handleRequest, url:' + req.url);
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pendingRequests.push([req, res, false]);
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handleNextRequest();
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}
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// Handle new websocket request
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obj.handleWebSocket = function (ws, req) {
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parent.parent.debug('webrelay', 'handleWebSocket, url:' + req.url);
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pendingRequests.push([req, ws, true]);
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handleNextRequest();
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}
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@ -146,19 +150,26 @@ module.exports.CreateWebRelaySession = function (parent, db, req, args, domain,
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function launchNewTunnel() {
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// Launch a new tunnel
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parent.parent.debug('webrelay', 'launchNewTunnel');
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const tunnel = module.exports.CreateWebRelay(obj, db, args, domain);
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tunnel.onclose = function (tunnelId, processedCount) {
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if (tunnels == null) return;
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parent.parent.debug('webrelay', 'tunnel-onclose');
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if (processedCount == 0) { errorCount++; } // If this tunnel closed without processing any requests, mark this as an error
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delete tunnels[tunnelId];
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handleNextRequest();
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}
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tunnel.onconnect = function (tunnelId) {
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if (tunnels == null) return;
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parent.parent.debug('webrelay', 'tunnel-onconnect');
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if (pendingRequests.length > 0) {
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const x = pendingRequests.shift();
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if (x[2] == true) { tunnels[tunnelId].processWebSocket(x[0], x[1]); } else { tunnels[tunnelId].processRequest(x[0], x[1]); }
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}
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}
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tunnel.oncompleted = function (tunnelId) {
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if (tunnels == null) return;
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parent.parent.debug('webrelay', 'tunnel-oncompleted');
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errorCount = 0; // Something got completed, clear any error count
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if (pendingRequests.length > 0) {
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const x = pendingRequests.shift();
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@ -170,10 +181,14 @@ module.exports.CreateWebRelaySession = function (parent, db, req, args, domain,
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tunnels[tunnel.tunnelId] = tunnel;
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}
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// Close all tunnels
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obj.close = function () { close(); }
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// Close all tunnels
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function close() {
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// Set the session as closed
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if (obj.closed == true) return;
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parent.parent.debug('webrelay', 'tunnel-close');
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obj.closed = true;
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// Close all tunnels
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@ -291,7 +306,7 @@ module.exports.CreateWebRelay = function (parent, db, args, domain) {
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function sendWebSocketFrameToDevice(op, payload) {
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// Select a random mask
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const mask = parent.parent.crypto.randomBytes(4)
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const mask = parent.parent.parent.crypto.randomBytes(4)
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// Setup header and mask
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var header = null;
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@ -376,7 +391,7 @@ module.exports.CreateWebRelay = function (parent, db, args, domain) {
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// Encode a cookie for the mesh relay
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const cookieContent = { userid: userid, domainid: domain.id, nodeid: nodeid, tcpport: port };
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if (addr != null) { cookieContent.tcpaddr = addr; }
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const cookie = parent.parent.encodeCookie(cookieContent, parent.parent.loginCookieEncryptionKey);
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const cookie = parent.parent.parent.encodeCookie(cookieContent, parent.parent.parent.loginCookieEncryptionKey);
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try {
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// Setup the correct URL with domain and use TLS only if needed.
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@ -385,9 +400,9 @@ module.exports.CreateWebRelay = function (parent, db, args, domain) {
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var domainadd = '';
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if ((domain.dns == null) && (domain.id != '')) { domainadd = domain.id + '/' }
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const url = protocol + '://localhost:' + args.port + '/' + domainadd + (((obj.mtype == 3) && (obj.relaynodeid == null)) ? 'local' : 'mesh') + 'relay.ashx?p=14&auth=' + cookie; // Protocol 14 is Web-TCP
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parent.parent.debug('relay', 'TCP: Connection websocket to ' + url);
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parent.parent.parent.debug('relay', 'TCP: Connection websocket to ' + url);
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obj.wsClient = new WebSocket(url, options);
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obj.wsClient.on('open', function () { parent.parent.debug('relay', 'TCP: Relay websocket open'); });
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obj.wsClient.on('open', function () { parent.parent.parent.debug('relay', 'TCP: Relay websocket open'); });
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obj.wsClient.on('message', function (data) { // Make sure to handle flow control.
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if (obj.tls) {
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// WS --> TLS
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@ -402,13 +417,13 @@ module.exports.CreateWebRelay = function (parent, db, args, domain) {
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// TLSSocket to encapsulate TLS communication, which then tunneled via SerialTunnel
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const tlsoptions = { socket: obj.ser, rejectUnauthorized: false };
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obj.tls = require('tls').connect(tlsoptions, function () {
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parent.parent.debug('relay', "Web Relay Secure TLS Connection");
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parent.parent.parent.debug('relay', "Web Relay Secure TLS Connection");
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obj.relayActive = true;
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parent.lastOperation = obj.lastOperation = Date.now(); // Update time of last opertion performed
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if (obj.onconnect) { obj.onconnect(obj.tunnelId); } // Event connection
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});
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obj.tls.setEncoding('binary');
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obj.tls.on('error', function (err) { parent.parent.debug('relay', "Web Relay TLS Connection Error", err); obj.close(); });
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obj.tls.on('error', function (err) { parent.parent.parent.debug('relay', "Web Relay TLS Connection Error", err); obj.close(); });
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// Decrypted tunnel from TLS communcation to be forwarded to the browser
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obj.tls.on('data', function (data) { processHttpData(data); }); // TLS ---> Browser
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@ -423,8 +438,8 @@ module.exports.CreateWebRelay = function (parent, db, args, domain) {
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processRawHttpData(data);
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}
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});
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obj.wsClient.on('close', function () { parent.parent.debug('relay', 'TCP: Relay websocket closed'); obj.close(); });
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obj.wsClient.on('error', function (err) { parent.parent.debug('relay', 'TCP: Relay websocket error: ' + err); obj.close(); });
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obj.wsClient.on('close', function () { parent.parent.parent.debug('relay', 'TCP: Relay websocket closed'); obj.close(); });
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obj.wsClient.on('error', function (err) { parent.parent.parent.debug('relay', 'TCP: Relay websocket error: ' + err); obj.close(); });
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} catch (ex) {
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console.log(ex);
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}
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@ -656,7 +671,7 @@ module.exports.CreateWebRelay = function (parent, db, args, domain) {
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// Send data thru the relay tunnel. Written to use TLS if needed.
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function send(data) { try { if (obj.tls) { obj.tls.write(data); } else { obj.wsClient.send(data); } } catch (ex) { } }
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parent.parent.debug('relay', 'TCP: Request for web relay');
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parent.parent.parent.debug('relay', 'TCP: Request for web relay');
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return obj;
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};
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@ -29,7 +29,6 @@ module.exports.CreateWebRelayServer = function (parent, db, args, certificates,
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obj.webRelayServer = null;
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obj.port = 0;
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obj.cleanupTimer = null;
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var nextSessionId = 1;
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var relaySessions = {} // RelayID --> Web Mutli-Tunnel
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const constants = (require('crypto').constants ? require('crypto').constants : require('constants')); // require('constants') is deprecated in Node 11.10, use require('crypto').constants instead.
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var tlsSessionStore = {}; // Store TLS session information for quick resume.
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@ -68,14 +67,14 @@ module.exports.CreateWebRelayServer = function (parent, db, args, certificates,
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httpOnly: true,
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keys: [args.sessionkey], // If multiple instances of this server are behind a load-balancer, this secret must be the same for all instances
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secure: (args.tlsoffload == null), // Use this cookie only over TLS (Check this: https://expressjs.com/en/guide/behind-proxies.html)
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sameSite: args.sessionsamesite
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sameSite: (args.sessionsamesite ? args.sessionsamesite : 'lax')
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}
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if (args.sessiontime != null) { sessionOptions.maxAge = (args.sessiontime * 60 * 1000); }
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obj.app.use(obj.session(sessionOptions));
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// Add HTTP security headers to all responses
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obj.app.use(function (req, res, next) {
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parent.debug('webrequest', req.url + ' (RelayServer)');
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parent.debug('webrelay', req.url);
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res.removeHeader('X-Powered-By');
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res.set({
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'strict-transport-security': 'max-age=60000; includeSubDomains',
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@ -83,7 +82,7 @@ module.exports.CreateWebRelayServer = function (parent, db, args, certificates,
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'x-frame-options': 'SAMEORIGIN',
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'X-XSS-Protection': '1; mode=block',
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'X-Content-Type-Options': 'nosniff',
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'Content-Security-Policy': "default-src 'none'; style-src 'self' 'unsafe-inline';"
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'Content-Security-Policy': "default-src 'self'; style-src 'self' 'unsafe-inline';"
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});
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// Set the real IP address of the request
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@ -121,8 +120,8 @@ module.exports.CreateWebRelayServer = function (parent, db, args, certificates,
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return next();
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} else {
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// If this is a normal request (GET, POST, etc) handle it here
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if ((req.session.userid != null) && (req.session.rid != null)) {
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var relaySession = relaySessions[req.session.userid + '/' + req.session.rid];
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if ((req.session.userid != null) && (req.session.x != null)) {
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var relaySession = relaySessions[req.session.userid + '/' + req.session.x];
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if (relaySession != null) {
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// The web relay session is valid, use it
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relaySession.handleRequest(req, res);
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@ -154,8 +153,8 @@ module.exports.CreateWebRelayServer = function (parent, db, args, certificates,
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// Handle incoming web socket calls
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obj.app.ws('/*', function (ws, req) {
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if ((req.session.userid != null) && (req.session.rid != null)) {
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var relaySession = relaySessions[req.session.userid + '/' + req.session.rid];
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if ((req.session.userid != null) && (req.session.x != null)) {
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var relaySession = relaySessions[req.session.userid + '/' + req.session.x];
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if (relaySession != null) {
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// The multi-tunnel session is valid, use it
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relaySession.handleWebSocket(ws, req);
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@ -173,10 +172,10 @@ module.exports.CreateWebRelayServer = function (parent, db, args, certificates,
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obj.app.get('/control-redirect.ashx', function (req, res) {
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if ((req.session == null) || (req.session.userid == null)) { res.redirect('/'); return; }
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res.set({ 'Cache-Control': 'no-store' });
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parent.debug('web', 'webRelaySetup');
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parent.debug('webrelay', 'webRelaySetup');
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// Check that all the required arguments are present
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if ((req.session.userid == null) || (req.query.n == null) || (req.query.p == null) || ((req.query.appid != 1) && (req.query.appid != 2))) { res.redirect('/'); return; }
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if ((req.session.userid == null) || (req.session.x == null) || (req.query.n == null) || (req.query.p == null) || ((req.query.appid != 1) && (req.query.appid != 2))) { res.redirect('/'); return; }
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// Get the user and domain information
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const userid = req.session.userid;
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@ -188,36 +187,31 @@ module.exports.CreateWebRelayServer = function (parent, db, args, certificates,
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const appid = parseInt(req.query.appid);
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// Check to see if we already have a multi-relay session that matches exactly this device and port for this user
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var relaySession = null;
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for (var i in relaySessions) {
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const xrelaySession = relaySessions[i];
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if ((xrelaySession.domain.id == domain.id) && (xrelaySession.userid == userid) && (xrelaySession.nodeid == nodeid) && (xrelaySession.addr == addr) && (xrelaySession.port == port) && (xrelaySession.appid == appid)) {
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relaySession = xrelaySession; // We found an exact match
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}
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const xrelaySession = relaySessions[req.session.userid + '/' + req.session.x];
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if ((xrelaySession != null) && (xrelaySession.domain.id == domain.id) && (xrelaySession.userid == userid) && (xrelaySession.nodeid == nodeid) && (xrelaySession.addr == addr) && (xrelaySession.port == port) && (xrelaySession.appid == appid)) {
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// We found an exact match, we are all setup already, redirect to root
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res.redirect('/');
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return;
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}
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if (relaySession != null) {
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// Since we found a match, use it
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req.session.rid = relaySession.sessionId;
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} else {
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// Create a web relay session
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relaySession = require('./apprelays.js').CreateWebRelaySession(parent, db, req, args, domain, userid, nodeid, addr, port, appid);
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relaySession.onclose = function (sessionId) {
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// Remove the relay session
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delete relaySessions[sessionId];
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// If there are not more relay sessions, clear the cleanup timer
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if ((Object.keys(relaySessions).length == 0) && (obj.cleanupTimer != null)) { clearInterval(obj.cleanupTimer); obj.cleanupTimer = null; }
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}
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relaySession.sessionId = nextSessionId++;
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// There is a relay session, but it's not correct, close it.
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if (xrelaySession != null) { xrelaySession.close(); delete relaySessions[req.session.userid + '/' + req.session.x]; }
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// Set the multi-tunnel session
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relaySessions[userid + '/' + relaySession.sessionId] = relaySession;
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req.session.rid = relaySession.sessionId;
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// Setup the cleanup timer if needed
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if (obj.cleanupTimer == null) { obj.cleanupTimer = setInterval(checkTimeout, 10000); }
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// Create a web relay session
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const relaySession = require('./apprelays.js').CreateWebRelaySession(obj, db, req, args, domain, userid, nodeid, addr, port, appid);
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relaySession.onclose = function (sessionId) {
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// Remove the relay session
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delete relaySessions[sessionId];
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// If there are not more relay sessions, clear the cleanup timer
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if ((Object.keys(relaySessions).length == 0) && (obj.cleanupTimer != null)) { clearInterval(obj.cleanupTimer); obj.cleanupTimer = null; }
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}
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// Set the multi-tunnel session
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relaySessions[userid + '/' + req.session.x] = relaySession;
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// Setup the cleanup timer if needed
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if (obj.cleanupTimer == null) { obj.cleanupTimer = setInterval(checkTimeout, 10000); }
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// Redirect to root
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res.redirect('/');
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});
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78
webserver.js
78
webserver.js
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@ -5758,11 +5758,11 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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}
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}
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}
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//obj.app.use(obj.bodyParser.urlencoded({ extended: false }));
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// Setup the cookie session
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var sessionOptions = {
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name: 'xid', // Recommended security practice to not use the default cookie name
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httpOnly: true,
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domain: (certificates.CommonName != 'un-configured' ? "." + certificates.CommonName : null),
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keys: [obj.args.sessionkey], // If multiple instances of this server are behind a load-balancer, this secret must be the same for all instances
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secure: (obj.args.tlsoffload == null), // Use this cookie only over TLS (Check this: https://expressjs.com/en/guide/behind-proxies.html)
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sameSite: (obj.args.sessionsamesite ? obj.args.sessionsamesite : 'lax')
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@ -5876,7 +5876,9 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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}
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// If this is a web relay connection, handle it here.
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if ((obj.webRelayRouter != null) && (req.hostname == obj.args.relaydns)) { return obj.webRelayRouter(req, res); }
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if ((obj.webRelayRouter != null) && (req.hostname == obj.args.relaydns)) {
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if (['GET', 'POST', 'PUT', 'HEAD'].indexOf(req.method) >= 0) { return obj.webRelayRouter(req, res); } else { res.sendStatus(404); return; }
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}
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// Get the domain for this request
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const domain = req.xdomain = getDomain(req);
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@ -6590,7 +6592,7 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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parent.debug('web', 'webRelaySetup');
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// Check that all the required arguments are present
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if ((req.session.userid == null) || (req.query.n == null) || (req.query.p == null) || ((req.query.appid != 1) && (req.query.appid != 2))) { res.redirect('/'); return; }
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if ((req.session.userid == null) || (req.session.x == null) || (req.query.n == null) || (req.query.p == null) || ((req.query.appid != 1) && (req.query.appid != 2))) { res.redirect('/'); return; }
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// Get the user and domain information
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const userid = req.session.userid;
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@ -6602,45 +6604,49 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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const appid = parseInt(req.query.appid);
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// Check to see if we already have a multi-relay session that matches exactly this device and port for this user
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var relaySession = null;
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for (var i in webRelaySessions) {
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const xrelaySession = webRelaySessions[i];
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if ((xrelaySession.domain.id == domain.id) && (xrelaySession.userid == userid) && (xrelaySession.nodeid == nodeid) && (xrelaySession.addr == addr) && (xrelaySession.port == port) && (xrelaySession.appid == appid)) {
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relaySession = xrelaySession; // We found an exact match
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}
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const xrelaySession = webRelaySessions[req.session.userid + '/' + req.session.x];
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if ((xrelaySession != null) && (xrelaySession.domain.id == domain.id) && (xrelaySession.userid == userid) && (xrelaySession.nodeid == nodeid) && (xrelaySession.addr == addr) && (xrelaySession.port == port) && (xrelaySession.appid == appid)) {
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// We found an exact match, we are all setup already, redirect to root
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res.redirect('/');
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return;
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}
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if (relaySession != null) {
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// Since we found a match, use it
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req.session.rid = relaySession.sessionId;
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} else {
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// Create a web relay session
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relaySession = require('./apprelays.js').CreateWebRelaySession(parent, db, req, args, domain, userid, nodeid, addr, port, appid);
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relaySession.onclose = function (sessionId) {
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// Remove the relay session
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delete webRelaySessions[sessionId];
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// If there are not more relay sessions, clear the cleanup timer
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if ((Object.keys(webRelaySessions).length == 0) && (webRelayCleanupTimer != null)) { clearInterval(webRelayCleanupTimer); webRelayCleanupTimer = null; }
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}
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relaySession.sessionId = webRelayNextSessionId++;
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// Set the multi-tunnel session
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webRelaySessions[userid + '/' + relaySession.sessionId] = relaySession;
|
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req.session.rid = relaySession.sessionId;
|
||||
|
||||
// Setup the cleanup timer if needed
|
||||
if (webRelayCleanupTimer == null) { webRelayCleanupTimer = setInterval(checkWebRelaySessionsTimeout, 10000); }
|
||||
// There is a relay session, but it's not correct, close it.
|
||||
if (xrelaySession != null) {
|
||||
xrelaySession.close();
|
||||
delete webRelaySessions[req.session.userid + '/' + req.session.x];
|
||||
}
|
||||
|
||||
// Create a web relay session
|
||||
const relaySession = require('./apprelays.js').CreateWebRelaySession(obj, db, req, args, domain, userid, nodeid, addr, port, appid);
|
||||
relaySession.onclose = function (sessionId) {
|
||||
// Remove the relay session
|
||||
delete webRelaySessions[sessionId];
|
||||
// If there are not more relay sessions, clear the cleanup timer
|
||||
if ((Object.keys(webRelaySessions).length == 0) && (obj.cleanupTimer != null)) { clearInterval(webRelayCleanupTimer); obj.cleanupTimer = null; }
|
||||
}
|
||||
|
||||
// Set the multi-tunnel session
|
||||
webRelaySessions[userid + '/' + req.session.x] = relaySession;
|
||||
|
||||
// Setup the cleanup timer if needed
|
||||
if (obj.cleanupTimer == null) { webRelayCleanupTimer = setInterval(checkWebRelaySessionsTimeout, 10000); }
|
||||
|
||||
// Redirect to root
|
||||
res.redirect('/');
|
||||
});
|
||||
|
||||
// Handle all incoming requests as web relays
|
||||
obj.webRelayRouter.get('/*', function (req, res) { handleWebRelayRequest(req, res); })
|
||||
obj.webRelayRouter.get('/*', function (req, res) { try { handleWebRelayRequest(req, res); } catch (ex) { console.log(ex); } })
|
||||
|
||||
// Handle all incoming requests as web relays
|
||||
obj.webRelayRouter.post('/*', function (req, res) { handleWebRelayRequest(req, res); })
|
||||
obj.webRelayRouter.post('/*', function (req, res) { try { handleWebRelayRequest(req, res); } catch (ex) { console.log(ex); } })
|
||||
|
||||
// Handle all incoming requests as web relays
|
||||
obj.webRelayRouter.put('/*', function (req, res) { try { handleWebRelayRequest(req, res); } catch (ex) { console.log(ex); } })
|
||||
|
||||
// Handle all incoming requests as web relays
|
||||
obj.webRelayRouter.head('/*', function (req, res) { try { handleWebRelayRequest(req, res); } catch (ex) { console.log(ex); } })
|
||||
}
|
||||
|
||||
// Indicates to ExpressJS that the override public folder should be used to serve static files.
|
||||
|
|
@ -6685,8 +6691,8 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
|
|||
|
||||
// Handle an incoming request as a web relay
|
||||
function handleWebRelayRequest(req, res) {
|
||||
if ((req.session.userid != null) && (req.session.rid != null)) {
|
||||
var relaySession = webRelaySessions[req.session.userid + '/' + req.session.rid];
|
||||
if ((req.session.userid != null) && (req.session.x != null)) {
|
||||
var relaySession = webRelaySessions[req.session.userid + '/' + req.session.x];
|
||||
if (relaySession != null) {
|
||||
// The web relay session is valid, use it
|
||||
relaySession.handleRequest(req, res);
|
||||
|
|
@ -6702,8 +6708,8 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
|
|||
|
||||
// Handle an incoming websocket connection as a web relay
|
||||
function handleWebRelayWebSocket(ws, req) {
|
||||
if ((req.session.userid != null) && (req.session.rid != null)) {
|
||||
var relaySession = webRelaySessions[req.session.userid + '/' + req.session.rid];
|
||||
if ((req.session.userid != null) && (req.session.x != null)) {
|
||||
var relaySession = webRelaySessions[req.session.userid + '/' + req.session.x];
|
||||
if (relaySession != null) {
|
||||
// The multi-tunnel session is valid, use it
|
||||
relaySession.handleWebSocket(ws, req);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue