mirror of
https://github.com/Ylianst/MeshCentral.git
synced 2024-11-27 11:57:45 +03:00
310 lines
16 KiB
JavaScript
310 lines
16 KiB
JavaScript
/**
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* @description Mesh Agent Transport Module - using websocket relay
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* @author Ylian Saint-Hilaire
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* @version v0.0.1f
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*/
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// Construct a MeshServer agent direction object
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var CreateAgentRedirect = function (meshserver, module, serverPublicNamePort, authCookie, rauthCookie, domainUrl) {
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var obj = {};
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obj.m = module; // This is the inner module (Terminal or Desktop)
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module.parent = obj;
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obj.meshserver = meshserver;
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obj.authCookie = authCookie;
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obj.rauthCookie = rauthCookie;
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obj.State = 0; // 0 = Disconnected, 1 = Connected, 2 = Connected to server, 3 = End-to-end connection.
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obj.nodeid = null;
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obj.options = null;
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obj.socket = null;
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obj.connectstate = -1;
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obj.tunnelid = Math.random().toString(36).substring(2); // Generate a random client tunnel id
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obj.protocol = module.protocol; // 1 = SOL, 2 = KVM, 3 = IDER, 4 = Files, 5 = FileTransfer
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obj.onStateChanged = null;
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obj.ctrlMsgAllowed = true;
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obj.attemptWebRTC = false;
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obj.webRtcActive = false;
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obj.webSwitchOk = false;
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obj.webchannel = null;
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obj.webrtc = null;
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obj.debugmode = 0;
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obj.serverIsRecording = false;
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obj.urlname = 'meshrelay.ashx';
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obj.latency = { lastSend: null, current: -1, callback: null };
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if (domainUrl == null) { domainUrl = '/'; }
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// Console Message
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obj.consoleMessage = null;
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obj.onConsoleMessageChange = null;
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// Session Metadata
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obj.metadata = null;
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obj.onMetadataChange = null;
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// Private method
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//obj.debug = function (msg) { console.log(msg); }
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// Display websocket or webrtc data to the console
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function logData(e, name) {
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if (typeof e.data == 'object') {
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var view = new Uint8Array(e.data), cmd = (view[0] << 8) + view[1], cmdsize = (view[2] << 8) + view[3];
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console.log(name + ' binary data', cmd, cmdsize, e.data.byteLength, buf2hex(e.data).substring(0, 24));
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} else if (typeof e.data == 'string') {
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console.log(name + ' string data', e.data.length, e.data);
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} else {
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console.log(name + ' unknown data', e.data);
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}
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}
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obj.Start = function (nodeid) {
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var url2, url = window.location.protocol.replace('http', 'ws') + '//' + window.location.host + window.location.pathname.substring(0, window.location.pathname.lastIndexOf('/')) + '/' + obj.urlname + '?browser=1&p=' + obj.protocol + (nodeid?('&nodeid=' + nodeid):'') + '&id=' + obj.tunnelid;
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//if (serverPublicNamePort) { url2 = window.location.protocol.replace('http', 'ws') + '//' + serverPublicNamePort + '/meshrelay.ashx?id=' + obj.tunnelid; } else { url2 = url; }
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if ((authCookie != null) && (authCookie != '')) { url += '&auth=' + authCookie; }
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if ((urlargs != null) && (urlargs.slowrelay != null)) { url += '&slowrelay=' + urlargs.slowrelay; }
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obj.nodeid = nodeid;
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obj.connectstate = 0;
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obj.socket = new WebSocket(url);
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obj.socket.binaryType = 'arraybuffer';
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obj.socket.onopen = obj.xxOnSocketConnected;
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obj.socket.onmessage = obj.xxOnMessage;
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//obj.socket.onmessage = function (e) { logData(e, 'WebSocket'); obj.xxOnMessage(e); }
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obj.socket.onerror = function (e) { /* console.error(e); */ }
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obj.socket.onclose = obj.xxOnSocketClosed;
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obj.xxStateChange(1);
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if (obj.meshserver != null) {
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var rurl = '*' + domainUrl + 'meshrelay.ashx?p=' + obj.protocol + '&nodeid=' + nodeid + '&id=' + obj.tunnelid;
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if ((rauthCookie != null) && (rauthCookie != '')) { rurl += ('&rauth=' + rauthCookie); }
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obj.meshserver.send({ action: 'msg', type: 'tunnel', nodeid: obj.nodeid, value: rurl, usage: obj.protocol });
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//obj.debug('Agent Redir Start: ' + url);
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}
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}
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obj.xxOnSocketConnected = function () {
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if (obj.debugmode == 1) { console.log('onSocketConnected'); }
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//obj.debug('Agent Redir Socket Connected');
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obj.xxStateChange(2);
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}
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// Called to pass websocket control messages
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obj.xxOnControlCommand = function (msg) {
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var controlMsg;
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try { controlMsg = JSON.parse(msg); } catch (e) { return; }
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if (controlMsg.ctrlChannel != '102938') { if (obj.m.ProcessData) { obj.m.ProcessData(msg); } else { console.log(msg); } return; }
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if ((typeof args != 'undefined') && args.redirtrace) { console.log('RedirRecv', controlMsg); }
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if (controlMsg.type == 'console') {
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obj.setConsoleMessage(controlMsg.msg, controlMsg.msgid, controlMsg.msgargs, controlMsg.timeout);
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} else if (controlMsg.type == 'metadata') {
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obj.metadata = controlMsg;
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if (obj.onMetadataChange) obj.onMetadataChange(obj.metadata);
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} else if ((controlMsg.type == 'rtt') && (typeof controlMsg.time == 'number')) {
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obj.latency.current = (new Date().getTime()) - controlMsg.time;
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if (obj.latency.callbacks != null) { obj.latency.callback(obj.latency.current); }
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} else if (obj.webrtc != null) {
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if (controlMsg.type == 'answer') {
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obj.webrtc.setRemoteDescription(new RTCSessionDescription(controlMsg), function () { /*console.log('WebRTC remote ok');*/ }, obj.xxCloseWebRTC);
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} else if (controlMsg.type == 'webrtc0') {
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obj.webSwitchOk = true; // Other side is ready for switch over
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performWebRtcSwitch();
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} else if (controlMsg.type == 'webrtc1') {
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obj.sendCtrlMsg('{"ctrlChannel":"102938","type":"webrtc2"}'); // Confirm we got end of data marker, indicates data will no longer be received on websocket.
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} else if (controlMsg.type == 'webrtc2') {
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// TODO: Resume/Start sending data over WebRTC
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}
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} else if (controlMsg.type == 'ping') { // if we get a ping, respond with a pong.
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obj.sendCtrlMsg('{"ctrlChannel":"102938","type":"pong"}');
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}
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}
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// Set the console message
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obj.setConsoleMessage = function (str, id, args, timeout) {
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if (obj.consoleMessage == str) return;
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obj.consoleMessage = str;
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obj.consoleMessageId = id;
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obj.consoleMessageArgs = args;
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obj.consoleMessageTimeout = timeout;
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if (obj.onConsoleMessageChange) { obj.onConsoleMessageChange(obj, obj.consoleMessage, obj.consoleMessageId); }
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}
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obj.sendCtrlMsg = function (x) { if (obj.ctrlMsgAllowed == true) { if ((typeof args != 'undefined') && args.redirtrace) { console.log('RedirSend', typeof x, x); } try { obj.socket.send(x); } catch (ex) { } } }
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function performWebRtcSwitch() {
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if ((obj.webSwitchOk == true) && (obj.webRtcActive == true)) {
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obj.latency.current = -1; // RTT will no longer be calculated when WebRTC is enabled
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obj.sendCtrlMsg('{"ctrlChannel":"102938","type":"webrtc0"}'); // Indicate to the meshagent that it can start traffic switchover
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obj.sendCtrlMsg('{"ctrlChannel":"102938","type":"webrtc1"}'); // Indicate to the meshagent that data traffic will no longer be sent over websocket.
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// TODO: Hold/Stop sending data over websocket
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if (obj.onStateChanged != null) { obj.onStateChanged(obj, obj.State); }
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}
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}
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obj.xxOnMessage = function (e) {
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//console.log('Recv', e.data, e.data.byteLength, obj.State);
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if (obj.State < 3) {
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if ((e.data == 'c') || (e.data == 'cr')) {
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if (e.data == 'cr') { obj.serverIsRecording = true; }
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if (obj.options != null) { delete obj.options.action; obj.options.type = 'options'; try { obj.sendCtrlMsg(JSON.stringify(obj.options)); } catch (ex) { } }
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try { obj.socket.send(obj.protocol); } catch (ex) { }
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obj.xxStateChange(3);
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if (obj.attemptWebRTC == true) {
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// Try to get WebRTC setup
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var configuration = null; //{ "iceServers": [ { 'urls': 'stun:stun.services.mozilla.com' }, { 'urls': 'stun:stun.l.google.com:19302' } ] };
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if (typeof RTCPeerConnection !== 'undefined') { obj.webrtc = new RTCPeerConnection(configuration); }
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else if (typeof webkitRTCPeerConnection !== 'undefined') { obj.webrtc = new webkitRTCPeerConnection(configuration); }
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if ((obj.webrtc != null) && (obj.webrtc.createDataChannel)) {
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obj.webchannel = obj.webrtc.createDataChannel('DataChannel', {}); // { ordered: false, maxRetransmits: 2 }
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obj.webchannel.binaryType = 'arraybuffer';
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obj.webchannel.onmessage = obj.xxOnMessage;
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//obj.webchannel.onmessage = function (e) { logData(e, 'WebRTC'); obj.xxOnMessage(e); }
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obj.webchannel.onopen = function () { obj.webRtcActive = true; performWebRtcSwitch(); };
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obj.webchannel.onclose = function (event) { if (obj.webRtcActive) { obj.Stop(); } }
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obj.webrtc.onicecandidate = function (e) {
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if (e.candidate == null) {
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try { obj.sendCtrlMsg(JSON.stringify(obj.webrtcoffer)); } catch (ex) { } // End of candidates, send the offer
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} else {
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obj.webrtcoffer.sdp += ('a=' + e.candidate.candidate + '\r\n'); // New candidate, add it to the SDP
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}
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}
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obj.webrtc.oniceconnectionstatechange = function () {
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if (obj.webrtc != null) {
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if (obj.webrtc.iceConnectionState == 'disconnected') { if (obj.webRtcActive == true) { obj.Stop(); } else { obj.xxCloseWebRTC(); } }
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else if (obj.webrtc.iceConnectionState == 'failed') { obj.xxCloseWebRTC(); }
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}
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}
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obj.webrtc.createOffer(function (offer) {
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// Got the offer
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obj.webrtcoffer = offer;
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obj.webrtc.setLocalDescription(offer, function () { /*console.log('WebRTC local ok');*/ }, obj.xxCloseWebRTC);
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}, obj.xxCloseWebRTC, { mandatory: { OfferToReceiveAudio: false, OfferToReceiveVideo: false } });
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}
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}
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return;
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}
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}
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// Control messages, most likely WebRTC setup
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//console.log('New data', e.data.byteLength);
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if (typeof e.data == 'string') {
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if (e.data[0] == '~') { obj.m.ProcessData(e.data); } else { obj.xxOnControlCommand(e.data); }
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} else {
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// Send the data to the module
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if (obj.m.ProcessBinaryCommand) {
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// If only 1 byte
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if ((cmdAccLen == 0) && (e.data.byteLength < 4)) return; // Ignore any commands less than 4 bytes.
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// Send as Binary Command
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if (cmdAccLen != 0) {
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// Accumulator is active
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var view = new Uint8Array(e.data);
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cmdAcc.push(view);
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cmdAccLen += view.byteLength;
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//console.log('Accumulating', cmdAccLen);
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if (cmdAccCmdSize <= cmdAccLen) {
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var tmp = new Uint8Array(cmdAccLen), tmpPtr = 0;
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for (var i in cmdAcc) { tmp.set(cmdAcc[i], tmpPtr); tmpPtr += cmdAcc[i].byteLength; }
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//console.log('AccumulatorCompleted');
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obj.m.ProcessBinaryCommand(cmdAccCmd, cmdAccCmdSize, tmp);
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cmdAccCmd = 0, cmdAccCmdSize = 0, cmdAccLen = 0, cmdAcc = [];
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}
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} else {
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// Accumulator is not active
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var view = new Uint8Array(e.data), cmd = (view[0] << 8) + view[1], cmdsize = (view[2] << 8) + view[3];
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if ((cmd == 27) && (cmdsize == 8)) { cmd = (view[8] << 8) + view[9]; cmdsize = (view[5] << 16) + (view[6] << 8) + view[7]; view = view.slice(8); }
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//console.log(cmdsize, view.byteLength);
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if (cmdsize != view.byteLength) {
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//console.log('AccumulatorRequired', cmd, cmdsize, view.byteLength);
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cmdAccCmd = cmd; cmdAccCmdSize = cmdsize; cmdAccLen = view.byteLength, cmdAcc = [view];
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} else {
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obj.m.ProcessBinaryCommand(cmd, cmdsize, view);
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}
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}
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} else if (obj.m.ProcessBinaryData) {
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// Send as Binary
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obj.m.ProcessBinaryData(new Uint8Array(e.data));
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} else {
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// Send as Text
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if (e.data.byteLength < 16000) { // Process small data block
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obj.m.ProcessData(String.fromCharCode.apply(null, new Uint8Array(e.data))); // This will stack overflow on Chrome with 100k+ blocks.
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} else { // Process large data block
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var bb = new Blob([new Uint8Array(e.data)]), f = new FileReader();
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f.onload = function (e) { obj.m.ProcessData(e.target.result); };
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f.readAsBinaryString(bb);
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}
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}
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}
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};
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// Command accumulator, this is used for WebRTC fragmentation
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var cmdAccCmd = 0, cmdAccCmdSize = 0, cmdAccLen = 0, cmdAcc = [];
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obj.sendText = function (x) {
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if (typeof x != 'string') { x = JSON.stringify(x); } // Turn into a string if needed
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obj.send(encode_utf8(x)); // Encode UTF8 correctly
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}
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obj.send = function (x) {
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//obj.debug('Agent Redir Send(' + obj.webRtcActive + ', ' + x.length + '): ' + rstr2hex(x));
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//console.log('Agent Redir Send(' + obj.webRtcActive + ', ' + x.length + '): ' + ((typeof x == 'string')?x:rstr2hex(x)));
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if ((typeof args != 'undefined') && args.redirtrace) { console.log('RedirSend', typeof x, x.length, (x[0] == '{') ? x : rstr2hex(x).substring(0, 64)); }
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try {
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if (obj.socket != null && obj.socket.readyState == WebSocket.OPEN) {
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if (typeof x == 'string') {
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if (obj.debugmode == 1) {
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var b = new Uint8Array(x.length), c = [];
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for (var i = 0; i < x.length; ++i) { b[i] = x.charCodeAt(i); c.push(x.charCodeAt(i)); }
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if (obj.webRtcActive == true) { obj.webchannel.send(b.buffer); } else { obj.socket.send(b.buffer); }
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//console.log('Send', c);
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} else {
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var b = new Uint8Array(x.length);
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for (var i = 0; i < x.length; ++i) { b[i] = x.charCodeAt(i); }
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if (obj.webRtcActive == true) { obj.webchannel.send(b.buffer); } else { obj.socket.send(b.buffer); }
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}
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} else {
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//if (obj.debugmode == 1) { console.log('Send', x); }
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if (obj.webRtcActive == true) { obj.webchannel.send(x); } else { obj.socket.send(x); }
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}
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}
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} catch (ex) { }
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}
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obj.xxOnSocketClosed = function () {
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//obj.debug('Agent Redir Socket Closed');
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//if (obj.debugmode == 1) { console.log('onSocketClosed'); }
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obj.Stop(1);
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}
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obj.xxStateChange = function(newstate) {
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if (obj.State == newstate) return;
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obj.State = newstate;
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obj.m.xxStateChange(obj.State);
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if (obj.onStateChanged != null) obj.onStateChanged(obj, obj.State);
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}
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// Close the WebRTC connection, should be called if a problem occurs during WebRTC setup.
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obj.xxCloseWebRTC = function () {
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if (obj.webchannel != null) { try { obj.webchannel.close(); } catch (e) { } obj.webchannel = null; }
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if (obj.webrtc != null) { try { obj.webrtc.close(); } catch (e) { } obj.webrtc = null; }
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obj.webRtcActive = false;
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}
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obj.Stop = function (x) {
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if (obj.debugmode == 1) { console.log('stop', x); }
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// Clean up WebRTC
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obj.xxCloseWebRTC();
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//obj.debug('Agent Redir Socket Stopped');
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obj.connectstate = -1;
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if (obj.socket != null) {
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try { if (obj.socket.readyState == 1) { obj.sendCtrlMsg('{"ctrlChannel":"102938","type":"close"}'); obj.socket.close(); } } catch (e) { }
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obj.socket = null;
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}
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obj.xxStateChange(0);
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}
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// Buffer is an ArrayBuffer
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function buf2hex(buffer) { return [...new Uint8Array(buffer)].map(x => x.toString(16).padStart(2, '0')).join(''); }
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return obj;
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}
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