734 lines
48 KiB
JavaScript
734 lines
48 KiB
JavaScript
/**
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* @description MeshCentral connection relay module
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* @author Ylian Saint-Hilaire
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* @copyright Intel Corporation 2018-2021
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* @license Apache-2.0
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* @version v0.0.1
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*/
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/*jslint node: true */
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/*jshint node: true */
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/*jshint strict:false */
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/*jshint -W097 */
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/*jshint esversion: 6 */
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"use strict";
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function checkDeviceSharePublicIdentifier(parent, domain, nodeid, pid, func) {
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// Check the public id
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parent.db.GetAllTypeNodeFiltered([nodeid], domain.id, 'deviceshare', null, function (err, docs) {
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if ((err != null) || (docs.length == 0)) { func(false); return; }
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// Search for the device share public identifier
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var found = false;
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for (var i = 0; i < docs.length; i++) { if (docs[i].publicid == pid) { found = true; } }
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func(found);
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});
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}
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module.exports.CreateMeshRelay = function (parent, ws, req, domain, user, cookie) {
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if ((cookie != null) && (typeof cookie.nid == 'string') && (typeof cookie.pid == 'string')) {
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checkDeviceSharePublicIdentifier(parent, domain, cookie.nid, cookie.pid, function (result) {
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// If the identifier if not found, close the connection
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if (result == false) { try { ws.close(); } catch (e) { } return; }
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// Public device sharing identifier found, continue as normal.
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CreateMeshRelayEx(parent, ws, req, domain, user, cookie);
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});
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} else {
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CreateMeshRelayEx(parent, ws, req, domain, user, cookie);
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}
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}
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function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
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const currentTime = Date.now();
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if (cookie) {
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if ((typeof cookie.expire == 'number') && (cookie.expire <= currentTime)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Expires cookie (' + req.clientIp + ')'); } catch (e) { console.log(e); } return; }
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if (typeof cookie.nid == 'string') { req.query.nodeid = cookie.nid; }
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}
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var obj = {};
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obj.ws = ws;
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obj.id = req.query.id;
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obj.user = user;
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obj.ruserid = null;
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obj.req = req; // Used in multi-server.js
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// Setup subscription for desktop sharing public identifier
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// If the identifier is removed, drop the connection
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if ((cookie != null) && (typeof cookie.pid == 'string')) {
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obj.pid = cookie.pid;
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parent.parent.AddEventDispatch([cookie.nid], obj);
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obj.HandleEvent = function (source, event, ids, id) { if ((event.action == 'removedDeviceShare') && (obj.pid == event.publicid)) { closeBothSides(); } }
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}
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// Check relay authentication
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if ((user == null) && (obj.req.query != null) && (obj.req.query.rauth != null)) {
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const rcookie = parent.parent.decodeCookie(obj.req.query.rauth, parent.parent.loginCookieEncryptionKey, 240); // Cookie with 4 hour timeout
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if (rcookie.ruserid != null) { obj.ruserid = rcookie.ruserid; }
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}
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// If there is no authentication, drop this connection
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if ((obj.id != null) && (obj.id.startsWith('meshmessenger/') == false) && (obj.user == null) && (obj.ruserid == null)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Connection with no authentication (' + obj.req.clientIp + ')'); } catch (e) { console.log(e); } return; }
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// Relay session count (we may remove this in the future)
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obj.relaySessionCounted = true;
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parent.relaySessionCount++;
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// Setup slow relay is requested. This will show down sending any data to this peer.
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if ((req.query.slowrelay != null)) {
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var sr = null;
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try { sr = parseInt(req.query.slowrelay); } catch (ex) { }
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if ((typeof sr == 'number') && (sr > 0) && (sr < 1000)) { obj.ws.slowRelay = sr; }
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}
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// Mesh Rights
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const MESHRIGHT_EDITMESH = 1;
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const MESHRIGHT_MANAGEUSERS = 2;
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const MESHRIGHT_MANAGECOMPUTERS = 4;
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const MESHRIGHT_REMOTECONTROL = 8;
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const MESHRIGHT_AGENTCONSOLE = 16;
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const MESHRIGHT_SERVERFILES = 32;
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const MESHRIGHT_WAKEDEVICE = 64;
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const MESHRIGHT_SETNOTES = 128;
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const MESHRIGHT_REMOTEVIEW = 256;
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// Site rights
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const SITERIGHT_SERVERBACKUP = 1;
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const SITERIGHT_MANAGEUSERS = 2;
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const SITERIGHT_SERVERRESTORE = 4;
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const SITERIGHT_FILEACCESS = 8;
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const SITERIGHT_SERVERUPDATE = 16;
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const SITERIGHT_LOCKED = 32;
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// Clean a IPv6 address that encodes a IPv4 address
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function cleanRemoteAddr(addr) { if (addr.startsWith('::ffff:')) { return addr.substring(7); } else { return addr; } }
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// Disconnect this agent
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obj.close = function (arg) {
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if ((arg == 1) || (arg == null)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Soft disconnect (' + obj.req.clientIp + ')'); } catch (e) { console.log(e); } } // Soft close, close the websocket
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if (arg == 2) { try { ws._socket._parent.end(); parent.parent.debug('relay', 'Relay: Hard disconnect (' + obj.req.clientIp + ')'); } catch (e) { console.log(e); } } // Hard close, close the TCP socket
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// Aggressive cleanup
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delete obj.id;
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delete obj.ws;
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delete obj.peer;
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delete obj.expireTimer;
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// Unsubscribe
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if (obj.pid != null) { parent.parent.RemoveAllEventDispatch(obj); }
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};
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obj.sendAgentMessage = function (command, userid, domainid) {
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var rights, mesh;
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if (command.nodeid == null) return false;
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var user = parent.users[userid];
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if (user == null) return false;
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var splitnodeid = command.nodeid.split('/');
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// Check that we are in the same domain and the user has rights over this node.
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if ((splitnodeid[0] == 'node') && (splitnodeid[1] == domainid)) {
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// Get the user object
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// See if the node is connected
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var agent = parent.wsagents[command.nodeid];
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if (agent != null) {
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// Check if we have permission to send a message to that node
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rights = parent.GetNodeRights(user, agent.dbMeshKey, agent.dbNodeKey);
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mesh = parent.meshes[agent.dbMeshKey];
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if ((rights != null) && (mesh != null) || ((rights & MESHRIGHT_REMOTECONTROL) != 0)) {
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if (ws.sessionId) { command.sessionid = ws.sessionId; } // Set the session id, required for responses.
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command.rights = rights; // Add user rights flags to the message
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if (typeof command.consent == 'number') { command.consent = command.consent | mesh.consent; } else { command.consent = mesh.consent; } // Add user consent
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if (typeof domain.userconsentflags == 'number') { command.consent |= domain.userconsentflags; } // Add server required consent flags
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command.username = user.name; // Add user name
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command.realname = user.realname; // Add real name
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if (typeof domain.desktopprivacybartext == 'string') { command.privacybartext = domain.desktopprivacybartext; } // Privacy bar text
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delete command.nodeid; // Remove the nodeid since it's implyed.
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agent.send(JSON.stringify(command));
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return true;
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}
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} else {
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// Check if a peer server is connected to this agent
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var routing = parent.parent.GetRoutingServerIdNotSelf(command.nodeid, 1); // 1 = MeshAgent routing type
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if (routing != null) {
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// Check if we have permission to send a message to that node
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rights = parent.GetNodeRights(user, routing.meshid, command.nodeid);
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mesh = parent.meshes[routing.meshid];
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if (rights != null || ((rights & MESHRIGHT_REMOTECONTROL) != 0)) {
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if (ws.sessionId) { command.fromSessionid = ws.sessionId; } // Set the session id, required for responses.
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command.rights = rights; // Add user rights flags to the message
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if (typeof command.consent == 'number') { command.consent = command.consent | mesh.consent; } else { command.consent = mesh.consent; } // Add user consent
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if (typeof domain.userconsentflags == 'number') { command.consent |= domain.userconsentflags; } // Add server required consent flags
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command.username = user.name; // Add user name
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command.realname = user.realname; // Add real name
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if (typeof domain.desktopprivacybartext == 'string') { command.privacybartext = domain.desktopprivacybartext; } // Privacy bar text
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parent.parent.multiServer.DispatchMessageSingleServer(command, routing.serverid);
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return true;
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}
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}
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}
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}
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return false;
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};
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// Send a PING/PONG message
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function sendPing() {
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try { obj.ws.send('{"ctrlChannel":"102938","type":"ping"}'); } catch (ex) { }
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try { if (obj.peer != null) { obj.peer.ws.send('{"ctrlChannel":"102938","type":"ping"}'); } } catch (ex) { }
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}
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function sendPong() {
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try { obj.ws.send('{"ctrlChannel":"102938","type":"pong"}'); } catch (ex) { }
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try { if (obj.peer != null) { obj.peer.ws.send('{"ctrlChannel":"102938","type":"pong"}'); } } catch (ex) { }
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}
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function performRelay() {
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if (obj.id == null) { try { obj.close(); } catch (e) { } return null; } // Attempt to connect without id, drop this.
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ws._socket.setKeepAlive(true, 240000); // Set TCP keep alive
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// If this is a MeshMessenger session, the ID is the two userid's and authentication must match one of them.
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if (obj.id.startsWith('meshmessenger/')) {
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if ((obj.id.startsWith('meshmessenger/user/') == true) && (user == null)) { try { obj.close(); } catch (e) { } return null; } // If user-to-user, both sides need to be authenticated.
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var x = obj.id.split('/'), user1 = x[1] + '/' + x[2] + '/' + x[3], user2 = x[4] + '/' + x[5] + '/' + x[6];
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if ((x[1] != 'user') && (x[4] != 'user')) { try { obj.close(); } catch (e) { } return null; } // MeshMessenger session must have at least one authenticated user
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if ((x[1] == 'user') && (x[4] == 'user')) {
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// If this is a user-to-user session, you must be authenticated to join.
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if ((user._id != user1) && (user._id != user2)) { try { obj.close(); } catch (e) { } return null; }
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} else {
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// If only one side of the session is a user
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// !!!!! TODO: Need to make sure that one of the two sides is the correct user. !!!!!
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}
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}
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// Validate that the id is valid, we only need to do this on non-authenticated sessions.
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// TODO: Figure out when this needs to be done.
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/*
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if (!parent.args.notls) {
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// Check the identifier, if running without TLS, skip this.
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var ids = obj.id.split(':');
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if (ids.length != 3) { ws.close(); delete obj.id; return null; } // Invalid ID, drop this.
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if (parent.crypto.createHmac('SHA384', parent.relayRandom).update(ids[0] + ':' + ids[1]).digest('hex') != ids[2]) { ws.close(); delete obj.id; return null; } // Invalid HMAC, drop this.
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if ((Date.now() - parseInt(ids[1])) > 120000) { ws.close(); delete obj.id; return null; } // Expired time, drop this.
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obj.id = ids[0];
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}
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*/
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// Check the peer connection status
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{
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var relayinfo = parent.wsrelays[obj.id];
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if (relayinfo) {
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if (relayinfo.state == 1) {
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// Check that at least one connection is authenticated
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if ((obj.authenticated != true) && (relayinfo.peer1.authenticated != true)) {
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ws.close();
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parent.parent.debug('relay', 'Relay without-auth: ' + obj.id + ' (' + obj.req.clientIp + ')');
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delete obj.id;
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delete obj.ws;
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delete obj.peer;
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return null;
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}
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// Check that both connection are for the same user
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if (!obj.id.startsWith('meshmessenger/')) {
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var u1 = obj.user ? obj.user._id : obj.ruserid;
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var u2 = relayinfo.peer1.user ? relayinfo.peer1.user._id : relayinfo.peer1.ruserid;
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if (parent.args.user != null) { // If the server is setup with a default user, correct the userid now.
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if (u1 != null) { u1 = 'user/' + domain.id + '/' + parent.args.user.toLowerCase(); }
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if (u2 != null) { u2 = 'user/' + domain.id + '/' + parent.args.user.toLowerCase(); }
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}
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if (u1 != u2) {
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ws.close();
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parent.parent.debug('relay', 'Relay auth mismatch (' + u1 + ' != ' + u2 + '): ' + obj.id + ' (' + obj.req.clientIp + ')');
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delete obj.id;
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delete obj.ws;
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delete obj.peer;
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return null;
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}
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}
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// Connect to peer
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obj.peer = relayinfo.peer1;
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obj.peer.peer = obj;
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relayinfo.peer2 = obj;
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relayinfo.state = 2;
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relayinfo.peer1.ws._socket.resume(); // Release the traffic
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relayinfo.peer2.ws._socket.resume(); // Release the traffic
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ws.time = relayinfo.peer1.ws.time = Date.now();
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relayinfo.peer1.ws.peer = relayinfo.peer2.ws;
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relayinfo.peer2.ws.peer = relayinfo.peer1.ws;
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// Remove the timeout
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if (relayinfo.timeout) { clearTimeout(relayinfo.timeout); delete relayinfo.timeout; }
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// Setup the agent PING/PONG timers
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if ((typeof parent.parent.args.agentping == 'number') && (obj.pingtimer == null)) { obj.pingtimer = setInterval(sendPing, parent.parent.args.agentping * 1000); }
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else if ((typeof parent.parent.args.agentpong == 'number') && (obj.pongtimer == null)) { obj.pongtimer = setInterval(sendPong, parent.parent.args.agentpong * 1000); }
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// Setup session recording
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var sessionUser = obj.user;
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if (sessionUser == null) { sessionUser = obj.peer.user; }
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if ((obj.req.query.p != null) && (obj.req.query.nodeid != null) && (sessionUser != null) && (domain.sessionrecording == true || ((typeof domain.sessionrecording == 'object') && ((domain.sessionrecording.protocols == null) || (domain.sessionrecording.protocols.indexOf(parseInt(obj.req.query.p)) >= 0))))) {
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// Get the computer name
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parent.db.Get(obj.req.query.nodeid, function (err, nodes) {
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var xusername = '', xdevicename = '', xdevicename2 = null, node = null;
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if ((nodes != null) && (nodes.length == 1)) { node = nodes[0]; xdevicename2 = node.name; xdevicename = '-' + parent.common.makeFilename(node.name); }
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// Check again if we need to do recording
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if (domain.sessionrecording.onlyselecteddevicegroups === true) {
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var mesh = parent.meshes[node.meshid];
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if ((mesh.flags == null) || ((mesh.flags & 4) == 0)) {
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// Do not record the session, just send session start
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try { ws.send('c'); } catch (ex) { } // Send connect to both peers
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try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
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return;
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}
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}
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// Get the username and make it acceptable as a filename
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if (sessionUser._id) { xusername = '-' + parent.common.makeFilename(sessionUser._id.split('/')[2]); }
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var now = new Date(Date.now());
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var recFilename = 'relaysession' + ((domain.id == '') ? '' : '-') + domain.id + '-' + now.getUTCFullYear() + '-' + parent.common.zeroPad(now.getUTCMonth(), 2) + '-' + parent.common.zeroPad(now.getUTCDate(), 2) + '-' + parent.common.zeroPad(now.getUTCHours(), 2) + '-' + parent.common.zeroPad(now.getUTCMinutes(), 2) + '-' + parent.common.zeroPad(now.getUTCSeconds(), 2) + xusername + xdevicename + '-' + obj.id + '.mcrec'
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var recFullFilename = null;
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if (domain.sessionrecording.filepath) {
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try { parent.parent.fs.mkdirSync(domain.sessionrecording.filepath); } catch (e) { }
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recFullFilename = parent.parent.path.join(domain.sessionrecording.filepath, recFilename);
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} else {
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try { parent.parent.fs.mkdirSync(parent.parent.recordpath); } catch (e) { }
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recFullFilename = parent.parent.path.join(parent.parent.recordpath, recFilename);
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}
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parent.parent.fs.open(recFullFilename, 'w', function (err, fd) {
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if (err != null) {
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// Unable to record
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parent.parent.debug('relay', 'Relay: Unable to record to file: ' + recFullFilename);
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try { ws.send('c'); } catch (ex) { } // Send connect to both peers
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try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
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} else {
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// Write the recording file header
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parent.parent.debug('relay', 'Relay: Started recoding to file: ' + recFullFilename);
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var metadata = { magic: 'MeshCentralRelaySession', ver: 1, userid: sessionUser._id, username: sessionUser.name, sessionid: obj.id, ipaddr1: obj.req.clientIp, ipaddr2: obj.peer.req.clientIp, time: new Date().toLocaleString(), protocol: (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.p), nodeid: (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.nodeid ) };
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if (xdevicename2 != null) { metadata.devicename = xdevicename2; }
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var firstBlock = JSON.stringify(metadata);
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var logfile = { fd: fd, lock: false, filename: recFullFilename, startTime: Date.now(), size: 0 };
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if (node != null) { logfile.nodeid = node._id; logfile.meshid = node.meshid; logfile.name = node.name; logfile.icon = node.icon; }
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recordingEntry(logfile, 1, 0, firstBlock, function () {
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try { relayinfo.peer1.ws.logfile = ws.logfile = logfile; } catch (ex) {
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try { ws.send('c'); } catch (ex) { } // Send connect to both peers, 'cr' indicates the session is being recorded.
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try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
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return;
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}
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try { ws.send('cr'); } catch (ex) { } // Send connect to both peers, 'cr' indicates the session is being recorded.
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try { relayinfo.peer1.ws.send('cr'); } catch (ex) { }
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});
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}
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});
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});
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} else {
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// Send session start
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try { ws.send('c'); } catch (ex) { } // Send connect to both peers
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try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
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}
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parent.parent.debug('relay', 'Relay connected: ' + obj.id + ' (' + obj.req.clientIp + ' --> ' + obj.peer.req.clientIp + ')');
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// Log the connection
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if (sessionUser != null) {
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var msg = 'Started relay session', msgid = 13;
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if (obj.req.query.p == 1) { msg = 'Started terminal session'; msgid = 14; }
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else if (obj.req.query.p == 2) { msg = 'Started desktop session'; msgid = 15; }
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else if (obj.req.query.p == 5) { msg = 'Started file management session'; msgid = 16; }
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var event = { etype: 'relay', action: 'relaylog', domain: domain.id, userid: sessionUser._id, username: sessionUser.name, msgid: msgid, msgArgs: [obj.id, obj.peer.req.clientIp, req.clientIp], msg: msg + ' \"' + obj.id + '\" from ' + obj.peer.req.clientIp + ' to ' + req.clientIp, protocol: req.query.p, nodeid: req.query.nodeid };
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parent.parent.DispatchEvent(['*', sessionUser._id], obj, event);
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}
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} else {
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// Connected already, drop (TODO: maybe we should re-connect?)
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ws.close();
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parent.parent.debug('relay', 'Relay duplicate: ' + obj.id + ' (' + obj.req.clientIp + ')');
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delete obj.id;
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delete obj.ws;
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delete obj.peer;
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return null;
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}
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} else {
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// Wait for other relay connection
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ws._socket.pause(); // Hold traffic until the other connection
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parent.wsrelays[obj.id] = { peer1: obj, state: 1, timeout: setTimeout(closeBothSides, 30000) };
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parent.parent.debug('relay', 'Relay holding: ' + obj.id + ' (' + obj.req.clientIp + ') ' + (obj.authenticated ? 'Authenticated' : ''));
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// Check if a peer server has this connection
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if (parent.parent.multiServer != null) {
|
|
var rsession = parent.wsPeerRelays[obj.id];
|
|
if ((rsession != null) && (rsession.serverId > parent.parent.serverId)) {
|
|
// We must initiate the connection to the peer
|
|
parent.parent.multiServer.createPeerRelay(ws, req, rsession.serverId, obj.req.session.userid);
|
|
delete parent.wsrelays[obj.id];
|
|
} else {
|
|
// Send message to other peers that we have this connection
|
|
parent.parent.multiServer.DispatchMessage(JSON.stringify({ action: 'relay', id: obj.id }));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ws.flushSink = function () { try { ws._socket.resume(); } catch (ex) { console.log(ex); } };
|
|
|
|
// When data is received from the mesh relay web socket
|
|
ws.on('message', function (data) {
|
|
//console.log(typeof data, data.length);
|
|
if (this.peer != null) {
|
|
//if (typeof data == 'string') { console.log('Relay: ' + data); } else { console.log('Relay:' + data.length + ' byte(s)'); }
|
|
if (this.peer.slowRelay == null) {
|
|
try {
|
|
this._socket.pause();
|
|
if (this.logfile != null) {
|
|
// Write data to log file then perform relay
|
|
var xthis = this;
|
|
recordingEntry(this.logfile, 2, ((obj.req.query.browser) ? 2 : 0), data, function () { xthis.peer.send(data, ws.flushSink); });
|
|
} else {
|
|
// Perform relay
|
|
this.peer.send(data, ws.flushSink);
|
|
}
|
|
} catch (ex) { console.log(ex); }
|
|
} else {
|
|
try {
|
|
this._socket.pause();
|
|
if (this.logfile != null) {
|
|
// Write data to log file then perform slow relay
|
|
var xthis = this;
|
|
recordingEntry(this.logfile, 2, ((obj.req.query.browser) ? 2 : 0), data, function () {
|
|
setTimeout(function () { xthis.peer.send(data, ws.flushSink); }, xthis.peer.slowRelay);
|
|
});
|
|
} else {
|
|
// Perform slow relay
|
|
var xthis = this;
|
|
setTimeout(function () { xthis.peer.send(data, ws.flushSink); }, xthis.peer.slowRelay);
|
|
}
|
|
} catch (ex) { console.log(ex); }
|
|
}
|
|
}
|
|
});
|
|
|
|
// If error, close both sides of the relay.
|
|
ws.on('error', function (err) {
|
|
parent.relaySessionErrorCount++;
|
|
if (obj.relaySessionCounted) { parent.relaySessionCount--; delete obj.relaySessionCounted; }
|
|
console.log('Relay error from ' + obj.req.clientIp + ', ' + err.toString().split('\r')[0] + '.');
|
|
closeBothSides();
|
|
});
|
|
|
|
// If the relay web socket is closed, close both sides.
|
|
ws.on('close', function (req) {
|
|
if (obj.relaySessionCounted) { parent.relaySessionCount--; delete obj.relaySessionCounted; }
|
|
closeBothSides();
|
|
});
|
|
|
|
// Close both our side and the peer side.
|
|
function closeBothSides() {
|
|
if (obj.id != null) {
|
|
var relayinfo = parent.wsrelays[obj.id];
|
|
if (relayinfo != null) {
|
|
if (relayinfo.state == 2) {
|
|
var peer = (relayinfo.peer1 == obj) ? relayinfo.peer2 : relayinfo.peer1;
|
|
|
|
// Disconnect the peer
|
|
try { if (peer.relaySessionCounted) { parent.relaySessionCount--; delete peer.relaySessionCounted; } } catch (ex) { console.log(ex); }
|
|
parent.parent.debug('relay', 'Relay disconnect: ' + obj.id + ' (' + obj.req.clientIp + ' --> ' + peer.req.clientIp + ')');
|
|
try { peer.ws.close(); } catch (e) { } // Soft disconnect
|
|
try { peer.ws._socket._parent.end(); } catch (e) { } // Hard disconnect
|
|
|
|
// Log the disconnection
|
|
if (ws.time) {
|
|
var msg = 'Ended relay session', msgid = 9;
|
|
if (obj.req.query.p == 1) { msg = 'Ended terminal session', msgid = 10; }
|
|
else if (obj.req.query.p == 2) { msg = 'Ended desktop session', msgid = 11; }
|
|
else if (obj.req.query.p == 5) { msg = 'Ended file management session', msgid = 12; }
|
|
if (user) {
|
|
var event = { etype: 'relay', action: 'relaylog', domain: domain.id, userid: user._id, username: user.name, msgid: msgid, msgArgs: [obj.id, obj.req.clientIp, obj.peer.req.clientIp, Math.floor((Date.now() - ws.time) / 1000)], msg: msg + ' \"' + obj.id + '\" from ' + obj.req.clientIp + ' to ' + obj.peer.req.clientIp + ', ' + Math.floor((Date.now() - ws.time) / 1000) + ' second(s)', protocol: obj.req.query.p, nodeid: obj.req.query.nodeid };
|
|
parent.parent.DispatchEvent(['*', user._id], obj, event);
|
|
} else if (peer.user) {
|
|
var event = { etype: 'relay', action: 'relaylog', domain: domain.id, userid: peer.user._id, username: peer.user.name, msgid: msgid, msgArgs: [obj.id, obj.req.clientIp, obj.peer.req.clientIp, Math.floor((Date.now() - ws.time) / 1000)], msg: msg + ' \"' + obj.id + '\" from ' + obj.req.clientIp + ' to ' + obj.peer.req.clientIp + ', ' + Math.floor((Date.now() - ws.time) / 1000) + ' second(s)', protocol: obj.req.query.p, nodeid: obj.req.query.nodeid };
|
|
parent.parent.DispatchEvent(['*', peer.user._id], obj, event);
|
|
}
|
|
}
|
|
|
|
// Aggressive peer cleanup
|
|
delete peer.id;
|
|
delete peer.ws;
|
|
delete peer.peer;
|
|
if (peer.pingtimer != null) { clearInterval(peer.pingtimer); delete peer.pingtimer; }
|
|
if (peer.pongtimer != null) { clearInterval(peer.pongtimer); delete peer.pongtimer; }
|
|
} else {
|
|
parent.parent.debug('relay', 'Relay disconnect: ' + obj.id + ' (' + obj.req.clientIp + ')');
|
|
}
|
|
|
|
// Close the recording file if needed
|
|
if (ws.logfile != null) {
|
|
var logfile = ws.logfile;
|
|
delete ws.logfile;
|
|
if (peer.ws) { delete peer.ws.logfile; }
|
|
recordingEntry(logfile, 3, 0, 'MeshCentralMCREC', function (logfile, tag) {
|
|
parent.parent.fs.close(logfile.fd);
|
|
|
|
// Now that the recording file is closed, check if we need to index this file.
|
|
if (domain.sessionrecording.index !== false) { parent.parent.certificateOperations.acceleratorPerformOperation('indexMcRec', tag.logfile.filename); }
|
|
|
|
// Compute session length
|
|
var sessionLength = null;
|
|
if (tag.logfile.startTime != null) { sessionLength = Math.round((Date.now() - tag.logfile.startTime) / 1000); }
|
|
|
|
// Add a event entry about this recording
|
|
var basefile = parent.parent.path.basename(tag.logfile.filename);
|
|
var event = { etype: 'relay', action: 'recording', domain: domain.id, nodeid: tag.logfile.nodeid, msg: "Finished recording session" + (sessionLength ? (', ' + sessionLength + ' second(s)') : ''), filename: basefile, size: tag.logfile.size };
|
|
if (user) { event.userids = [user._id]; } else if (peer.user) { event.userids = [peer.user._id]; }
|
|
var xprotocol = (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.p);
|
|
if (xprotocol != null) { event.protocol = parseInt(xprotocol); }
|
|
var mesh = parent.meshes[tag.logfile.meshid];
|
|
if (mesh != null) { event.meshname = mesh.name; event.meshid = mesh._id; }
|
|
if (tag.logfile.startTime) { event.startTime = tag.logfile.startTime; event.lengthTime = sessionLength; }
|
|
if (tag.logfile.name) { event.name = tag.logfile.name; }
|
|
if (tag.logfile.icon) { event.icon = tag.logfile.icon; }
|
|
parent.parent.DispatchEvent(['*', 'recording', obj.nodeid, obj.meshid], obj, event);
|
|
|
|
cleanUpRecordings();
|
|
}, { ws: ws, pws: peer.ws, logfile: logfile });
|
|
}
|
|
|
|
try { ws.close(); } catch (ex) { }
|
|
delete parent.wsrelays[obj.id];
|
|
}
|
|
}
|
|
|
|
// Aggressive cleanup
|
|
delete obj.id;
|
|
delete obj.ws;
|
|
delete obj.peer;
|
|
if (obj.pingtimer != null) { clearInterval(obj.pingtimer); delete obj.pingtimer; }
|
|
if (obj.pongtimer != null) { clearInterval(obj.pongtimer); delete obj.pongtimer; }
|
|
|
|
// Unsubscribe
|
|
if (obj.pid != null) { parent.parent.RemoveAllEventDispatch(obj); }
|
|
}
|
|
|
|
// Record a new entry in a recording log
|
|
function recordingEntry(logfile, type, flags, data, func, tag) {
|
|
try {
|
|
if (typeof data == 'string') {
|
|
// String write
|
|
var blockData = Buffer.from(data), header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
|
|
header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data)
|
|
header.writeInt16BE(flags, 2); // Flags (1 = Binary, 2 = User)
|
|
header.writeInt32BE(blockData.length, 4); // Size
|
|
header.writeIntBE(new Date(), 10, 6); // Time
|
|
var block = Buffer.concat([header, blockData]);
|
|
parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
|
|
logfile.size += block.length;
|
|
} else {
|
|
// Binary write
|
|
var header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
|
|
header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data)
|
|
header.writeInt16BE(flags | 1, 2); // Flags (1 = Binary, 2 = User)
|
|
header.writeInt32BE(data.length, 4); // Size
|
|
header.writeIntBE(new Date(), 10, 6); // Time
|
|
var block = Buffer.concat([header, data]);
|
|
parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
|
|
logfile.size += block.length;
|
|
}
|
|
} catch (ex) { console.log(ex); func(logfile, tag); }
|
|
}
|
|
|
|
// If this session has a expire time, setup the expire timer now.
|
|
if (cookie && (typeof cookie.expire == 'number')) { obj.expireTimer = setTimeout(closeBothSides, cookie.expire - currentTime); }
|
|
|
|
// Mark this relay session as authenticated if this is the user end.
|
|
obj.authenticated = (user != null);
|
|
if (obj.authenticated) {
|
|
// Kick off the routing, if we have agent routing instructions, process them here.
|
|
// Routing instructions can only be given by a authenticated user
|
|
if ((cookie != null) && (cookie.nodeid != null) && (cookie.tcpport != null) && (cookie.domainid != null)) {
|
|
// We have routing instructions in the cookie, but first, check user access for this node.
|
|
parent.db.Get(cookie.nodeid, function (err, docs) {
|
|
if (docs.length == 0) { console.log('ERR: Node not found'); try { obj.close(); } catch (e) { } return; } // Disconnect websocket
|
|
const node = docs[0];
|
|
|
|
// Check if this user has permission to manage this computer
|
|
if ((parent.GetNodeRights(user, node.meshid, node._id) & MESHRIGHT_REMOTECONTROL) == 0) { console.log('ERR: Access denied (1)'); try { obj.close(); } catch (e) { } return; }
|
|
|
|
// Send connection request to agent
|
|
const rcookie = parent.parent.encodeCookie({ ruserid: user._id }, parent.parent.loginCookieEncryptionKey);
|
|
if (obj.id == null) { obj.id = ('' + Math.random()).substring(2); } // If there is no connection id, generate one.
|
|
const command = { nodeid: cookie.nodeid, action: 'msg', type: 'tunnel', userid: user._id, value: '*/meshrelay.ashx?id=' + obj.id + '&rauth=' + rcookie, tcpport: cookie.tcpport, tcpaddr: cookie.tcpaddr, soptions: {} };
|
|
if (typeof domain.consentmessages == 'object') {
|
|
if (typeof domain.consentmessages.title == 'string') { command.soptions.consentTitle = domain.consentmessages.title; }
|
|
if (typeof domain.consentmessages.desktop == 'string') { command.soptions.consentMsgDesktop = domain.consentmessages.desktop; }
|
|
if (typeof domain.consentmessages.terminal == 'string') { command.soptions.consentMsgTerminal = domain.consentmessages.terminal; }
|
|
if (typeof domain.consentmessages.files == 'string') { command.soptions.consentMsgFiles = domain.consentmessages.files; }
|
|
}
|
|
if (typeof domain.notificationmessages == 'object') {
|
|
if (typeof domain.notificationmessages.title == 'string') { command.soptions.notifyTitle = domain.notificationmessages.title; }
|
|
if (typeof domain.notificationmessages.desktop == 'string') { command.soptions.notifyMsgDesktop = domain.notificationmessages.desktop; }
|
|
if (typeof domain.notificationmessages.terminal == 'string') { command.soptions.notifyMsgTerminal = domain.notificationmessages.terminal; }
|
|
if (typeof domain.notificationmessages.files == 'string') { command.soptions.notifyMsgFiles = domain.notificationmessages.files; }
|
|
}
|
|
parent.parent.debug('relay', 'Relay: Sending agent tunnel command: ' + JSON.stringify(command));
|
|
if (obj.sendAgentMessage(command, user._id, cookie.domainid) == false) { delete obj.id; parent.parent.debug('relay', 'Relay: Unable to contact this agent (' + obj.req.clientIp + ')'); }
|
|
performRelay();
|
|
});
|
|
return obj;
|
|
} else if ((obj.req.query.nodeid != null) && ((obj.req.query.tcpport != null) || (obj.req.query.udpport != null))) {
|
|
// We have routing instructions in the URL arguments, but first, check user access for this node.
|
|
parent.db.Get(obj.req.query.nodeid, function (err, docs) {
|
|
if (docs.length == 0) { console.log('ERR: Node not found'); try { obj.close(); } catch (e) { } return; } // Disconnect websocket
|
|
const node = docs[0];
|
|
|
|
// Check if this user has permission to manage this computer
|
|
if ((parent.GetNodeRights(user, node.meshid, node._id) & MESHRIGHT_REMOTECONTROL) == 0) { console.log('ERR: Access denied (2)'); try { obj.close(); } catch (e) { } return; }
|
|
|
|
// Send connection request to agent
|
|
if (obj.id == null) { obj.id = ('' + Math.random()).substring(2); } // If there is no connection id, generate one.
|
|
const rcookie = parent.parent.encodeCookie({ ruserid: user._id }, parent.parent.loginCookieEncryptionKey);
|
|
|
|
if (obj.req.query.tcpport != null) {
|
|
const command = { nodeid: obj.req.query.nodeid, action: 'msg', type: 'tunnel', userid: user._id, value: '*/meshrelay.ashx?id=' + obj.id + '&rauth=' + rcookie, tcpport: obj.req.query.tcpport, tcpaddr: ((obj.req.query.tcpaddr == null) ? '127.0.0.1' : obj.req.query.tcpaddr), soptions: {} };
|
|
if (typeof domain.consentmessages == 'object') {
|
|
if (typeof domain.consentmessages.title == 'string') { command.soptions.consentTitle = domain.consentmessages.title; }
|
|
if (typeof domain.consentmessages.desktop == 'string') { command.soptions.consentMsgDesktop = domain.consentmessages.desktop; }
|
|
if (typeof domain.consentmessages.terminal == 'string') { command.soptions.consentMsgTerminal = domain.consentmessages.terminal; }
|
|
if (typeof domain.consentmessages.files == 'string') { command.soptions.consentMsgFiles = domain.consentmessages.files; }
|
|
}
|
|
if (typeof domain.notificationmessages == 'object') {
|
|
if (typeof domain.notificationmessages.title == 'string') { command.soptions.notifyTitle = domain.notificationmessages.title; }
|
|
if (typeof domain.notificationmessages.desktop == 'string') { command.soptions.notifyMsgDesktop = domain.notificationmessages.desktop; }
|
|
if (typeof domain.notificationmessages.terminal == 'string') { command.soptions.notifyMsgTerminal = domain.notificationmessages.terminal; }
|
|
if (typeof domain.notificationmessages.files == 'string') { command.soptions.notifyMsgFiles = domain.notificationmessages.files; }
|
|
}
|
|
parent.parent.debug('relay', 'Relay: Sending agent TCP tunnel command: ' + JSON.stringify(command));
|
|
if (obj.sendAgentMessage(command, user._id, domain.id) == false) { delete obj.id; parent.parent.debug('relay', 'Relay: Unable to contact this agent (' + obj.req.clientIp + ')'); }
|
|
} else if (obj.req.query.udpport != null) {
|
|
const command = { nodeid: obj.req.query.nodeid, action: 'msg', type: 'tunnel', userid: user._id, value: '*/meshrelay.ashx?id=' + obj.id + '&rauth=' + rcookie, udpport: obj.req.query.udpport, udpaddr: ((obj.req.query.udpaddr == null) ? '127.0.0.1' : obj.req.query.udpaddr), soptions: {} };
|
|
if (typeof domain.consentmessages == 'object') {
|
|
if (typeof domain.consentmessages.title == 'string') { command.soptions.consentTitle = domain.consentmessages.title; }
|
|
if (typeof domain.consentmessages.desktop == 'string') { command.soptions.consentMsgDesktop = domain.consentmessages.desktop; }
|
|
if (typeof domain.consentmessages.terminal == 'string') { command.soptions.consentMsgTerminal = domain.consentmessages.terminal; }
|
|
if (typeof domain.consentmessages.files == 'string') { command.soptions.consentMsgFiles = domain.consentmessages.files; }
|
|
}
|
|
if (typeof domain.notificationmessages == 'object') {
|
|
if (typeof domain.notificationmessages.title == 'string') { command.soptions.notifyTitle = domain.notificationmessages.title; }
|
|
if (typeof domain.notificationmessages.desktop == 'string') { command.soptions.notifyMsgDesktop = domain.notificationmessages.desktop; }
|
|
if (typeof domain.notificationmessages.terminal == 'string') { command.soptions.notifyMsgTerminal = domain.notificationmessages.terminal; }
|
|
if (typeof domain.notificationmessages.files == 'string') { command.soptions.notifyMsgFiles = domain.notificationmessages.files; }
|
|
}
|
|
parent.parent.debug('relay', 'Relay: Sending agent UDP tunnel command: ' + JSON.stringify(command));
|
|
if (obj.sendAgentMessage(command, user._id, domain.id) == false) { delete obj.id; parent.parent.debug('relay', 'Relay: Unable to contact this agent (' + obj.req.clientIp + ')'); }
|
|
}
|
|
performRelay();
|
|
});
|
|
return obj;
|
|
} else if ((cookie != null) && (cookie.nid != null) && (typeof cookie.r == 'number') && (typeof cookie.p == 'number') && (typeof cookie.cf == 'number') && (typeof cookie.gn == 'string')) {
|
|
// We have routing instructions in the cookie, but first, check user access for this node.
|
|
parent.db.Get(cookie.nid, function (err, docs) {
|
|
if (docs.length == 0) { console.log('ERR: Node not found'); try { obj.close(); } catch (e) { } return; } // Disconnect websocket
|
|
const node = docs[0];
|
|
|
|
// Check if this user has permission to manage this computer
|
|
if ((parent.GetNodeRights(user, node.meshid, node._id) & MESHRIGHT_REMOTECONTROL) == 0) { console.log('ERR: Access denied (2)'); try { obj.close(); } catch (e) { } return; }
|
|
|
|
// Send connection request to agent
|
|
if (obj.id == null) { obj.id = ('' + Math.random()).substring(2); }
|
|
const rcookie = parent.parent.encodeCookie({ ruserid: user._id, nodeid: node._id }, parent.parent.loginCookieEncryptionKey);
|
|
const command = { nodeid: node._id, action: 'msg', type: 'tunnel', userid: user._id, value: '*/meshrelay.ashx?p=' + cookie.p + '&id=' + obj.id + '&rauth=' + rcookie + '&nodeid=' + node._id, soptions: {}, usage: 2, rights: cookie.r, guestname: cookie.gn, consent: cookie.cf, remoteaddr: cleanRemoteAddr(obj.req.clientIp) };
|
|
if (typeof domain.consentmessages == 'object') {
|
|
if (typeof domain.consentmessages.title == 'string') { command.soptions.consentTitle = domain.consentmessages.title; }
|
|
if (typeof domain.consentmessages.desktop == 'string') { command.soptions.consentMsgDesktop = domain.consentmessages.desktop; }
|
|
if (typeof domain.consentmessages.terminal == 'string') { command.soptions.consentMsgTerminal = domain.consentmessages.terminal; }
|
|
if (typeof domain.consentmessages.files == 'string') { command.soptions.consentMsgFiles = domain.consentmessages.files; }
|
|
}
|
|
if (typeof domain.notificationmessages == 'object') {
|
|
if (typeof domain.notificationmessages.title == 'string') { command.soptions.notifyTitle = domain.notificationmessages.title; }
|
|
if (typeof domain.notificationmessages.desktop == 'string') { command.soptions.notifyMsgDesktop = domain.notificationmessages.desktop; }
|
|
if (typeof domain.notificationmessages.terminal == 'string') { command.soptions.notifyMsgTerminal = domain.notificationmessages.terminal; }
|
|
if (typeof domain.notificationmessages.files == 'string') { command.soptions.notifyMsgFiles = domain.notificationmessages.files; }
|
|
}
|
|
parent.parent.debug('relay', 'Relay: Sending agent tunnel command: ' + JSON.stringify(command));
|
|
if (obj.sendAgentMessage(command, user._id, domain.id) == false) { delete obj.id; parent.parent.debug('relay', 'Relay: Unable to contact this agent (' + obj.req.clientIp + ')'); }
|
|
|
|
performRelay(0);
|
|
});
|
|
return obj;
|
|
}
|
|
}
|
|
|
|
// If there is a recording quota, remove any old recordings if needed
|
|
function cleanUpRecordings() {
|
|
if ((parent.cleanUpRecordingsActive !== true) && domain.sessionrecording && ((typeof domain.sessionrecording.maxrecordings == 'number') || (typeof domain.sessionrecording.maxrecordingsizemegabytes == 'number'))) {
|
|
parent.cleanUpRecordingsActive = true;
|
|
setTimeout(function () {
|
|
var recPath = null, fs = require('fs');
|
|
if (domain.sessionrecording.filepath) { recPath = domain.sessionrecording.filepath; } else { recPath = parent.parent.recordpath; }
|
|
fs.readdir(recPath, function (err, files) {
|
|
if ((err != null) || (files == null)) { delete parent.cleanUpRecordingsActive; return; }
|
|
var recfiles = [];
|
|
for (var i in files) {
|
|
if (files[i].endsWith('.mcrec')) {
|
|
var j = files[i].indexOf('-');
|
|
if (j > 0) {
|
|
var size = null;
|
|
try { size = fs.statSync(parent.parent.path.join(recPath, files[i])).size } catch (ex) { }
|
|
if (size != null) { recfiles.push({ n: files[i], r: files[i].substring(j + 1), s: size }); }
|
|
}
|
|
}
|
|
}
|
|
recfiles.sort(function (a, b) { if (a.r < b.r) return 1; if (a.r > b.r) return -1; return 0; });
|
|
var totalFiles = 0, totalSize = 0;
|
|
for (var i in recfiles) {
|
|
var overQuota = false;
|
|
if ((typeof domain.sessionrecording.maxrecordings == 'number') && (totalFiles >= domain.sessionrecording.maxrecordings)) { overQuota = true; }
|
|
else if ((typeof domain.sessionrecording.maxrecordingsizemegabytes == 'number') && (totalSize >= (domain.sessionrecording.maxrecordingsizemegabytes * 1048576))) { overQuota = true; }
|
|
if (overQuota) { fs.unlinkSync(parent.parent.path.join(recPath, recfiles[i].n)); }
|
|
totalFiles++;
|
|
totalSize += recfiles[i].s;
|
|
}
|
|
delete parent.cleanUpRecordingsActive;
|
|
});
|
|
}, 500);
|
|
}
|
|
}
|
|
|
|
// If this is not an authenticated session, or the session does not have routing instructions, just go ahead an connect to existing session.
|
|
performRelay();
|
|
return obj;
|
|
};
|
|
|
|
/*
|
|
Relay session recording required that "SessionRecording":true be set in the domain section of the config.json.
|
|
Once done, a folder "meshcentral-recordings" will be created next to "meshcentral-data" that will contain all
|
|
of the recording files with the .mcrec extension.
|
|
|
|
The recording files are binary and contain a set of:
|
|
|
|
<HEADER><DATABLOCK><HEADER><DATABLOCK><HEADER><DATABLOCK><HEADER><DATABLOCK>...
|
|
|
|
The header is always 16 bytes long and is encoded like this:
|
|
|
|
TYPE 2 bytes, 1 = Header, 2 = Network Data, 3 = EndBlock
|
|
FLAGS 2 bytes, 0x0001 = Binary, 0x0002 = User
|
|
SIZE 4 bytes, Size of the data following this header.
|
|
TIME 8 bytes, Time this record was written, number of milliseconds since 1 January, 1970 UTC.
|
|
|
|
All values are BigEndian encoded. The first data block is of TYPE 1 and contains a JSON string with information
|
|
about this recording. It looks something like this:
|
|
|
|
{
|
|
magic: 'MeshCentralRelaySession',
|
|
ver: 1,
|
|
userid: "user\domain\userid",
|
|
username: "username",
|
|
sessionid: "RandomValue",
|
|
ipaddr1: 1.2.3.4,
|
|
ipaddr2: 1.2.3.5,
|
|
time: new Date().toLocaleString()
|
|
}
|
|
|
|
The rest of the data blocks are all network traffic that was relayed thru the server. They are of TYPE 2 and have
|
|
a given size and timestamp. When looking at network traffic the flags are important:
|
|
|
|
- If traffic has the first (0x0001) flag set, the data is binary otherwise it's a string.
|
|
- If the traffic has the second (0x0002) flag set, traffic is coming from the user's browser, if not, it's coming from the MeshAgent.
|
|
*/ |