peer-vnc
Version:
access to VNC desktop from anywhere
1,228 lines (1,030 loc) • 89.4 kB
JavaScript
/*
* noVNC: HTML5 VNC client
* Copyright (C) 2012 Joel Martin
* Copyright (C) 2013 Samuel Mannehed for Cendio AB
* Licensed under MPL 2.0 (see LICENSE.txt)
*
* See README.md for usage and integration instructions.
*
* TIGHT decoder portion:
* (c) 2012 Michael Tinglof, Joe Balaz, Les Piech (Mercuri.ca)
*/
/*jslint white: false, browser: true */
/*global window, Util, Display, Keyboard, Mouse, Websock, Websock_native, Base64, DES */
var RFB;
(function () {
"use strict";
RFB = function (defaults) {
if (!defaults) {
defaults = {};
}
this._rfb_host = '';
this._rfb_port = 5900;
this._rfb_password = '';
this._rfb_path = '';
this._rfb_state = 'disconnected';
this._rfb_version = 0;
this._rfb_max_version = 3.8;
this._rfb_auth_scheme = '';
this._rfb_tightvnc = false;
this._rfb_xvp_ver = 0;
// In preference order
this._encodings = [
['COPYRECT', 0x01 ],
['TIGHT', 0x07 ],
['TIGHT_PNG', -260 ],
['HEXTILE', 0x05 ],
['RRE', 0x02 ],
['RAW', 0x00 ],
['DesktopSize', -223 ],
['Cursor', -239 ],
// Psuedo-encoding settings
//['JPEG_quality_lo', -32 ],
['JPEG_quality_med', -26 ],
//['JPEG_quality_hi', -23 ],
//['compress_lo', -255 ],
['compress_hi', -247 ],
['last_rect', -224 ],
['xvp', -309 ],
['ExtendedDesktopSize', -308 ]
];
this._encHandlers = {};
this._encNames = {};
this._encStats = {};
this._sock = null; // Websock object
this._display = null; // Display object
this._keyboard = null; // Keyboard input handler object
this._mouse = null; // Mouse input handler object
this._sendTimer = null; // Send Queue check timer
this._disconnTimer = null; // disconnection timer
this._msgTimer = null; // queued handle_msg timer
// Frame buffer update state
this._FBU = {
rects: 0,
subrects: 0, // RRE
lines: 0, // RAW
tiles: 0, // HEXTILE
bytes: 0,
x: 0,
y: 0,
width: 0,
height: 0,
encoding: 0,
subencoding: -1,
background: null,
zlib: [] // TIGHT zlib streams
};
this._fb_Bpp = 4;
this._fb_depth = 3;
this._fb_width = 0;
this._fb_height = 0;
this._fb_name = "";
this._destBuff = null;
this._paletteBuff = new Uint8Array(1024); // 256 * 4 (max palette size * max bytes-per-pixel)
this._rre_chunk_sz = 100;
this._timing = {
last_fbu: 0,
fbu_total: 0,
fbu_total_cnt: 0,
full_fbu_total: 0,
full_fbu_cnt: 0,
fbu_rt_start: 0,
fbu_rt_total: 0,
fbu_rt_cnt: 0,
pixels: 0
};
this._supportsSetDesktopSize = false;
this._screen_id = 0;
this._screen_flags = 0;
// Mouse state
this._mouse_buttonMask = 0;
this._mouse_arr = [];
this._viewportDragging = false;
this._viewportDragPos = {};
this._viewportHasMoved = false;
// set the default value on user-facing properties
Util.set_defaults(this, defaults, {
'target': 'null', // VNC display rendering Canvas object
'focusContainer': document, // DOM element that captures keyboard input
'encrypt': false, // Use TLS/SSL/wss encryption
'true_color': true, // Request true color pixel data
'local_cursor': false, // Request locally rendered cursor
'shared': true, // Request shared mode
'view_only': false, // Disable client mouse/keyboard
'xvp_password_sep': '@', // Separator for XVP password fields
'disconnectTimeout': 3, // Time (s) to wait for disconnection
'wsProtocols': ['binary'], // Protocols to use in the WebSocket connection
'repeaterID': '', // [UltraVNC] RepeaterID to connect to
'viewportDrag': false, // Move the viewport on mouse drags
// Callback functions
'onUpdateState': function () { }, // onUpdateState(rfb, state, oldstate, statusMsg): state update/change
'onPasswordRequired': function () { }, // onPasswordRequired(rfb): VNC password is required
'onClipboard': function () { }, // onClipboard(rfb, text): RFB clipboard contents received
'onBell': function () { }, // onBell(rfb): RFB Bell message received
'onFBUReceive': function () { }, // onFBUReceive(rfb, fbu): RFB FBU received but not yet processed
'onFBUComplete': function () { }, // onFBUComplete(rfb, fbu): RFB FBU received and processed
'onFBResize': function () { }, // onFBResize(rfb, width, height): frame buffer resized
'onDesktopName': function () { }, // onDesktopName(rfb, name): desktop name received
'onXvpInit': function () { }, // onXvpInit(version): XVP extensions active for this connection
});
// main setup
Util.Debug(">> RFB.constructor");
// populate encHandlers with bound versions
Object.keys(RFB.encodingHandlers).forEach(function (encName) {
this._encHandlers[encName] = RFB.encodingHandlers[encName].bind(this);
}.bind(this));
// Create lookup tables based on encoding number
for (var i = 0; i < this._encodings.length; i++) {
this._encHandlers[this._encodings[i][1]] = this._encHandlers[this._encodings[i][0]];
this._encNames[this._encodings[i][1]] = this._encodings[i][0];
this._encStats[this._encodings[i][1]] = [0, 0];
}
// NB: nothing that needs explicit teardown should be done
// before this point, since this can throw an exception
try {
this._display = new Display({target: this._target});
} catch (exc) {
Util.Error("Display exception: " + exc);
throw exc;
}
this._keyboard = new Keyboard({target: this._focusContainer,
onKeyPress: this._handleKeyPress.bind(this)});
this._mouse = new Mouse({target: this._target,
onMouseButton: this._handleMouseButton.bind(this),
onMouseMove: this._handleMouseMove.bind(this),
notify: this._keyboard.sync.bind(this._keyboard)});
this._sock = new Websock();
this._sock.on('message', this._handle_message.bind(this));
this._sock.on('open', function () {
if (this._rfb_state === 'connect') {
this._updateState('ProtocolVersion', "Starting VNC handshake");
} else {
this._fail("Got unexpected WebSocket connection");
}
}.bind(this));
this._sock.on('close', function (e) {
Util.Warn("WebSocket on-close event");
var msg = "";
if (e.code) {
msg = " (code: " + e.code;
if (e.reason) {
msg += ", reason: " + e.reason;
}
msg += ")";
}
if (this._rfb_state === 'disconnect') {
this._updateState('disconnected', 'VNC disconnected' + msg);
} else if (this._rfb_state === 'ProtocolVersion') {
this._fail('Failed to connect to server' + msg);
} else if (this._rfb_state in {'failed': 1, 'disconnected': 1}) {
Util.Error("Received onclose while disconnected" + msg);
} else {
this._fail("Server disconnected" + msg);
}
this._sock.off('close');
}.bind(this));
this._sock.on('error', function (e) {
Util.Warn("WebSocket on-error event");
});
this._init_vars();
var rmode = this._display.get_render_mode();
if (Websock_native) {
Util.Info("Using native WebSockets");
this._updateState('loaded', 'noVNC ready: native WebSockets, ' + rmode);
} else {
this._cleanupSocket('fatal');
throw new Error("WebSocket support is required to use noVNC");
}
Util.Debug("<< RFB.constructor");
};
RFB.prototype = {
// Public methods
connect: function (host, port, password, path) {
this._rfb_host = host;
this._rfb_port = port;
this._rfb_password = (password !== undefined) ? password : "";
this._rfb_path = (path !== undefined) ? path : "";
if (!this._rfb_host || !this._rfb_port) {
return this._fail("Must set host and port");
}
this._updateState('connect');
},
disconnect: function () {
this._updateState('disconnect', 'Disconnecting');
this._sock.off('error');
this._sock.off('message');
this._sock.off('open');
},
sendPassword: function (passwd) {
this._rfb_password = passwd;
this._rfb_state = 'Authentication';
setTimeout(this._init_msg.bind(this), 1);
},
sendCtrlAltDel: function () {
if (this._rfb_state !== 'normal' || this._view_only) { return false; }
Util.Info("Sending Ctrl-Alt-Del");
RFB.messages.keyEvent(this._sock, XK_Control_L, 1);
RFB.messages.keyEvent(this._sock, XK_Alt_L, 1);
RFB.messages.keyEvent(this._sock, XK_Delete, 1);
RFB.messages.keyEvent(this._sock, XK_Delete, 0);
RFB.messages.keyEvent(this._sock, XK_Alt_L, 0);
RFB.messages.keyEvent(this._sock, XK_Control_L, 0);
this._sock.flush();
},
xvpOp: function (ver, op) {
if (this._rfb_xvp_ver < ver) { return false; }
Util.Info("Sending XVP operation " + op + " (version " + ver + ")");
this._sock.send_string("\xFA\x00" + String.fromCharCode(ver) + String.fromCharCode(op));
return true;
},
xvpShutdown: function () {
return this.xvpOp(1, 2);
},
xvpReboot: function () {
return this.xvpOp(1, 3);
},
xvpReset: function () {
return this.xvpOp(1, 4);
},
// Send a key press. If 'down' is not specified then send a down key
// followed by an up key.
sendKey: function (code, down) {
if (this._rfb_state !== "normal" || this._view_only) { return false; }
if (typeof down !== 'undefined') {
Util.Info("Sending key code (" + (down ? "down" : "up") + "): " + code);
RFB.messages.keyEvent(this._sock, code, down ? 1 : 0);
} else {
Util.Info("Sending key code (down + up): " + code);
RFB.messages.keyEvent(this._sock, code, 1);
RFB.messages.keyEvent(this._sock, code, 0);
}
this._sock.flush();
},
clipboardPasteFrom: function (text) {
if (this._rfb_state !== 'normal') { return; }
RFB.messages.clientCutUTF8Text(this._sock, text);
this._sock.flush();
},
// Requests a change of remote desktop size. This message is an extension
// and may only be sent if we have received an ExtendedDesktopSize message
requestDesktopSize: function (width, height) {
if (this._rfb_state !== "normal") { return; }
if (this._supportsSetDesktopSize) {
RFB.messages.setDesktopSize(this._sock, width, height,
this._screen_id, this._screen_flags);
this._sock.flush();
}
},
// Private methods
_connect: function () {
Util.Debug(">> RFB.connect");
var uri;
if (typeof UsingSocketIO !== 'undefined') {
uri = 'http';
} else {
uri = this._encrypt ? 'wss' : 'ws';
}
uri += '://' + this._rfb_host + ':' + this._rfb_port + '/' + this._rfb_path;
Util.Info("connecting to " + uri);
this._sock.open(uri, this._wsProtocols);
Util.Debug("<< RFB.connect");
},
_init_vars: function () {
// reset state
this._FBU.rects = 0;
this._FBU.subrects = 0; // RRE and HEXTILE
this._FBU.lines = 0; // RAW
this._FBU.tiles = 0; // HEXTILE
this._FBU.zlibs = []; // TIGHT zlib encoders
this._mouse_buttonMask = 0;
this._mouse_arr = [];
this._rfb_tightvnc = false;
// Clear the per connection encoding stats
var i;
for (i = 0; i < this._encodings.length; i++) {
this._encStats[this._encodings[i][1]][0] = 0;
}
for (i = 0; i < 4; i++) {
this._FBU.zlibs[i] = new inflator.Inflate();
}
},
_print_stats: function () {
Util.Info("Encoding stats for this connection:");
var i, s;
for (i = 0; i < this._encodings.length; i++) {
s = this._encStats[this._encodings[i][1]];
if (s[0] + s[1] > 0) {
Util.Info(" " + this._encodings[i][0] + ": " + s[0] + " rects");
}
}
Util.Info("Encoding stats since page load:");
for (i = 0; i < this._encodings.length; i++) {
s = this._encStats[this._encodings[i][1]];
Util.Info(" " + this._encodings[i][0] + ": " + s[1] + " rects");
}
},
_cleanupSocket: function (state) {
if (this._sendTimer) {
clearInterval(this._sendTimer);
this._sendTimer = null;
}
if (this._msgTimer) {
clearInterval(this._msgTimer);
this._msgTimer = null;
}
if (this._display && this._display.get_context()) {
this._keyboard.ungrab();
this._mouse.ungrab();
if (state !== 'connect' && state !== 'loaded') {
this._display.defaultCursor();
}
if (Util.get_logging() !== 'debug' || state === 'loaded') {
// Show noVNC logo on load and when disconnected, unless in
// debug mode
this._display.clear();
}
}
this._sock.close();
},
/*
* Page states:
* loaded - page load, equivalent to disconnected
* disconnected - idle state
* connect - starting to connect (to ProtocolVersion)
* normal - connected
* disconnect - starting to disconnect
* failed - abnormal disconnect
* fatal - failed to load page, or fatal error
*
* RFB protocol initialization states:
* ProtocolVersion
* Security
* Authentication
* password - waiting for password, not part of RFB
* SecurityResult
* ClientInitialization - not triggered by server message
* ServerInitialization (to normal)
*/
_updateState: function (state, statusMsg) {
var oldstate = this._rfb_state;
if (state === oldstate) {
// Already here, ignore
Util.Debug("Already in state '" + state + "', ignoring");
}
/*
* These are disconnected states. A previous connect may
* asynchronously cause a connection so make sure we are closed.
*/
if (state in {'disconnected': 1, 'loaded': 1, 'connect': 1,
'disconnect': 1, 'failed': 1, 'fatal': 1}) {
this._cleanupSocket(state);
}
if (oldstate === 'fatal') {
Util.Error('Fatal error, cannot continue');
}
var cmsg = typeof(statusMsg) !== 'undefined' ? (" Msg: " + statusMsg) : "";
var fullmsg = "New state '" + state + "', was '" + oldstate + "'." + cmsg;
if (state === 'failed' || state === 'fatal') {
Util.Error(cmsg);
} else {
Util.Warn(cmsg);
}
if (oldstate === 'failed' && state === 'disconnected') {
// do disconnect action, but stay in failed state
this._rfb_state = 'failed';
} else {
this._rfb_state = state;
}
if (this._disconnTimer && this._rfb_state !== 'disconnect') {
Util.Debug("Clearing disconnect timer");
clearTimeout(this._disconnTimer);
this._disconnTimer = null;
this._sock.off('close'); // make sure we don't get a double event
}
switch (state) {
case 'normal':
if (oldstate === 'disconnected' || oldstate === 'failed') {
Util.Error("Invalid transition from 'disconnected' or 'failed' to 'normal'");
}
break;
case 'connect':
this._init_vars();
this._connect();
// WebSocket.onopen transitions to 'ProtocolVersion'
break;
case 'disconnect':
this._disconnTimer = setTimeout(function () {
this._fail("Disconnect timeout");
}.bind(this), this._disconnectTimeout * 1000);
this._print_stats();
// WebSocket.onclose transitions to 'disconnected'
break;
case 'failed':
if (oldstate === 'disconnected') {
Util.Error("Invalid transition from 'disconnected' to 'failed'");
} else if (oldstate === 'normal') {
Util.Error("Error while connected.");
} else if (oldstate === 'init') {
Util.Error("Error while initializing.");
}
// Make sure we transition to disconnected
setTimeout(function () {
this._updateState('disconnected');
}.bind(this), 50);
break;
default:
// No state change action to take
}
if (oldstate === 'failed' && state === 'disconnected') {
this._onUpdateState(this, state, oldstate);
} else {
this._onUpdateState(this, state, oldstate, statusMsg);
}
},
_fail: function (msg) {
this._updateState('failed', msg);
return false;
},
_handle_message: function () {
if (this._sock.rQlen() === 0) {
Util.Warn("handle_message called on an empty receive queue");
return;
}
switch (this._rfb_state) {
case 'disconnected':
case 'failed':
Util.Error("Got data while disconnected");
break;
case 'normal':
if (this._normal_msg() && this._sock.rQlen() > 0) {
// true means we can continue processing
// Give other events a chance to run
if (this._msgTimer === null) {
Util.Debug("More data to process, creating timer");
this._msgTimer = setTimeout(function () {
this._msgTimer = null;
this._handle_message();
}.bind(this), 10);
} else {
Util.Debug("More data to process, existing timer");
}
}
break;
default:
this._init_msg();
break;
}
},
_handleKeyPress: function (keysym, down) {
if (this._view_only) { return; } // View only, skip keyboard, events
RFB.messages.keyEvent(this._sock, keysym, down);
this._sock.flush();
},
_handleMouseButton: function (x, y, down, bmask) {
if (down) {
this._mouse_buttonMask |= bmask;
} else {
this._mouse_buttonMask ^= bmask;
}
if (this._viewportDrag) {
if (down && !this._viewportDragging) {
this._viewportDragging = true;
this._viewportDragPos = {'x': x, 'y': y};
// Skip sending mouse events
return;
} else {
this._viewportDragging = false;
// If the viewport didn't actually move, then treat as a mouse click event
// Send the button down event here, as the button up event is sent at the end of this function
if (!this._viewportHasMoved && !this._view_only) {
RFB.messages.pointerEvent(this._sock, this._display.absX(x), this._display.absY(y), bmask);
}
this._viewportHasMoved = false;
}
}
if (this._view_only) { return; } // View only, skip mouse events
if (this._rfb_state !== "normal") { return; }
RFB.messages.pointerEvent(this._sock, this._display.absX(x), this._display.absY(y), this._mouse_buttonMask);
},
_handleMouseMove: function (x, y) {
if (this._viewportDragging) {
var deltaX = this._viewportDragPos.x - x;
var deltaY = this._viewportDragPos.y - y;
// The goal is to trigger on a certain physical width, the
// devicePixelRatio brings us a bit closer but is not optimal.
var dragThreshold = 10 * (window.devicePixelRatio || 1);
if (this._viewportHasMoved || (Math.abs(deltaX) > dragThreshold ||
Math.abs(deltaY) > dragThreshold)) {
this._viewportHasMoved = true;
this._viewportDragPos = {'x': x, 'y': y};
this._display.viewportChangePos(deltaX, deltaY);
}
// Skip sending mouse events
return;
}
if (this._view_only) { return; } // View only, skip mouse events
if (this._rfb_state !== "normal") { return; }
RFB.messages.pointerEvent(this._sock, this._display.absX(x), this._display.absY(y), this._mouse_buttonMask);
},
// Message Handlers
_negotiate_protocol_version: function () {
if (this._sock.rQlen() < 12) {
return this._fail("Incomplete protocol version");
}
var sversion = this._sock.rQshiftStr(12).substr(4, 7);
Util.Info("Server ProtocolVersion: " + sversion);
var is_repeater = 0;
switch (sversion) {
case "000.000": // UltraVNC repeater
is_repeater = 1;
break;
case "003.003":
case "003.006": // UltraVNC
case "003.889": // Apple Remote Desktop
this._rfb_version = 3.3;
break;
case "003.007":
this._rfb_version = 3.7;
break;
case "003.008":
case "004.000": // Intel AMT KVM
case "004.001": // RealVNC 4.6
this._rfb_version = 3.8;
break;
default:
return this._fail("Invalid server version " + sversion);
}
if (is_repeater) {
var repeaterID = this._repeaterID;
while (repeaterID.length < 250) {
repeaterID += "\0";
}
this._sock.send_string(repeaterID);
return true;
}
if (this._rfb_version > this._rfb_max_version) {
this._rfb_version = this._rfb_max_version;
}
// Send updates either at a rate of 1 update per 50ms, or
// whatever slower rate the network can handle
this._sendTimer = setInterval(this._sock.flush.bind(this._sock), 50);
var cversion = "00" + parseInt(this._rfb_version, 10) +
".00" + ((this._rfb_version * 10) % 10);
this._sock.send_string("RFB " + cversion + "\n");
this._updateState('Security', 'Sent ProtocolVersion: ' + cversion);
},
_negotiate_security: function () {
if (this._rfb_version >= 3.7) {
// Server sends supported list, client decides
var num_types = this._sock.rQshift8();
if (this._sock.rQwait("security type", num_types, 1)) { return false; }
if (num_types === 0) {
var strlen = this._sock.rQshift32();
var reason = this._sock.rQshiftStr(strlen);
return this._fail("Security failure: " + reason);
}
this._rfb_auth_scheme = 0;
var types = this._sock.rQshiftBytes(num_types);
Util.Debug("Server security types: " + types);
for (var i = 0; i < types.length; i++) {
if (types[i] > this._rfb_auth_scheme && (types[i] <= 16 || types[i] == 22)) {
this._rfb_auth_scheme = types[i];
}
}
if (this._rfb_auth_scheme === 0) {
return this._fail("Unsupported security types: " + types);
}
this._sock.send([this._rfb_auth_scheme]);
} else {
// Server decides
if (this._sock.rQwait("security scheme", 4)) { return false; }
this._rfb_auth_scheme = this._sock.rQshift32();
}
this._updateState('Authentication', 'Authenticating using scheme: ' + this._rfb_auth_scheme);
return this._init_msg(); // jump to authentication
},
// authentication
_negotiate_xvp_auth: function () {
var xvp_sep = this._xvp_password_sep;
var xvp_auth = this._rfb_password.split(xvp_sep);
if (xvp_auth.length < 3) {
this._updateState('password', 'XVP credentials required (user' + xvp_sep +
'target' + xvp_sep + 'password) -- got only ' + this._rfb_password);
this._onPasswordRequired(this);
return false;
}
var xvp_auth_str = String.fromCharCode(xvp_auth[0].length) +
String.fromCharCode(xvp_auth[1].length) +
xvp_auth[0] +
xvp_auth[1];
this._sock.send_string(xvp_auth_str);
this._rfb_password = xvp_auth.slice(2).join(xvp_sep);
this._rfb_auth_scheme = 2;
return this._negotiate_authentication();
},
_negotiate_std_vnc_auth: function () {
if (this._rfb_password.length === 0) {
// Notify via both callbacks since it's kind of
// an RFB state change and a UI interface issue
this._updateState('password', "Password Required");
this._onPasswordRequired(this);
return false;
}
if (this._sock.rQwait("auth challenge", 16)) { return false; }
// TODO(directxman12): make genDES not require an Array
var challenge = Array.prototype.slice.call(this._sock.rQshiftBytes(16));
var response = RFB.genDES(this._rfb_password, challenge);
this._sock.send(response);
this._updateState("SecurityResult");
return true;
},
_negotiate_tight_tunnels: function (numTunnels) {
var clientSupportedTunnelTypes = {
0: { vendor: 'TGHT', signature: 'NOTUNNEL' }
};
var serverSupportedTunnelTypes = {};
// receive tunnel capabilities
for (var i = 0; i < numTunnels; i++) {
var cap_code = this._sock.rQshift32();
var cap_vendor = this._sock.rQshiftStr(4);
var cap_signature = this._sock.rQshiftStr(8);
serverSupportedTunnelTypes[cap_code] = { vendor: cap_vendor, signature: cap_signature };
}
// choose the notunnel type
if (serverSupportedTunnelTypes[0]) {
if (serverSupportedTunnelTypes[0].vendor != clientSupportedTunnelTypes[0].vendor ||
serverSupportedTunnelTypes[0].signature != clientSupportedTunnelTypes[0].signature) {
return this._fail("Client's tunnel type had the incorrect vendor or signature");
}
this._sock.send([0, 0, 0, 0]); // use NOTUNNEL
return false; // wait until we receive the sub auth count to continue
} else {
return this._fail("Server wanted tunnels, but doesn't support the notunnel type");
}
},
_negotiate_tight_auth: function () {
if (!this._rfb_tightvnc) { // first pass, do the tunnel negotiation
if (this._sock.rQwait("num tunnels", 4)) { return false; }
var numTunnels = this._sock.rQshift32();
if (numTunnels > 0 && this._sock.rQwait("tunnel capabilities", 16 * numTunnels, 4)) { return false; }
this._rfb_tightvnc = true;
if (numTunnels > 0) {
this._negotiate_tight_tunnels(numTunnels);
return false; // wait until we receive the sub auth to continue
}
}
// second pass, do the sub-auth negotiation
if (this._sock.rQwait("sub auth count", 4)) { return false; }
var subAuthCount = this._sock.rQshift32();
if (this._sock.rQwait("sub auth capabilities", 16 * subAuthCount, 4)) { return false; }
var clientSupportedTypes = {
'STDVNOAUTH__': 1,
'STDVVNCAUTH_': 2
};
var serverSupportedTypes = [];
for (var i = 0; i < subAuthCount; i++) {
var capNum = this._sock.rQshift32();
var capabilities = this._sock.rQshiftStr(12);
serverSupportedTypes.push(capabilities);
}
for (var authType in clientSupportedTypes) {
if (serverSupportedTypes.indexOf(authType) != -1) {
this._sock.send([0, 0, 0, clientSupportedTypes[authType]]);
switch (authType) {
case 'STDVNOAUTH__': // no auth
this._updateState('SecurityResult');
return true;
case 'STDVVNCAUTH_': // VNC auth
this._rfb_auth_scheme = 2;
return this._init_msg();
default:
return this._fail("Unsupported tiny auth scheme: " + authType);
}
}
}
this._fail("No supported sub-auth types!");
},
_negotiate_authentication: function () {
switch (this._rfb_auth_scheme) {
case 0: // connection failed
if (this._sock.rQwait("auth reason", 4)) { return false; }
var strlen = this._sock.rQshift32();
var reason = this._sock.rQshiftStr(strlen);
return this._fail("Auth failure: " + reason);
case 1: // no auth
if (this._rfb_version >= 3.8) {
this._updateState('SecurityResult');
return true;
}
this._updateState('ClientInitialisation', "No auth required");
return this._init_msg();
case 22: // XVP auth
return this._negotiate_xvp_auth();
case 2: // VNC authentication
return this._negotiate_std_vnc_auth();
case 16: // TightVNC Security Type
return this._negotiate_tight_auth();
default:
return this._fail("Unsupported auth scheme: " + this._rfb_auth_scheme);
}
},
_handle_security_result: function () {
if (this._sock.rQwait('VNC auth response ', 4)) { return false; }
switch (this._sock.rQshift32()) {
case 0: // OK
this._updateState('ClientInitialisation', 'Authentication OK');
return this._init_msg();
case 1: // failed
if (this._rfb_version >= 3.8) {
var length = this._sock.rQshift32();
if (this._sock.rQwait("SecurityResult reason", length, 8)) { return false; }
var reason = this._sock.rQshiftStr(length);
return this._fail(reason);
} else {
return this._fail("Authentication failure");
}
return false;
case 2:
return this._fail("Too many auth attempts");
}
},
_negotiate_server_init: function () {
if (this._sock.rQwait("server initialization", 24)) { return false; }
/* Screen size */
this._fb_width = this._sock.rQshift16();
this._fb_height = this._sock.rQshift16();
this._destBuff = new Uint8Array(this._fb_width * this._fb_height * 4);
/* PIXEL_FORMAT */
var bpp = this._sock.rQshift8();
var depth = this._sock.rQshift8();
var big_endian = this._sock.rQshift8();
var true_color = this._sock.rQshift8();
var red_max = this._sock.rQshift16();
var green_max = this._sock.rQshift16();
var blue_max = this._sock.rQshift16();
var red_shift = this._sock.rQshift8();
var green_shift = this._sock.rQshift8();
var blue_shift = this._sock.rQshift8();
this._sock.rQskipBytes(3); // padding
// NB(directxman12): we don't want to call any callbacks or print messages until
// *after* we're past the point where we could backtrack
/* Connection name/title */
var name_length = this._sock.rQshift32();
if (this._sock.rQwait('server init name', name_length, 24)) { return false; }
///this._fb_name = Util.decodeUTF8(this._sock.rQshiftStr(name_length));
this._fb_name = ((this._sock.rQshiftStr(name_length)) || 'DeskTop').toString();
if (this._rfb_tightvnc) {
if (this._sock.rQwait('TightVNC extended server init header', 8, 24 + name_length)) { return false; }
// In TightVNC mode, ServerInit message is extended
var numServerMessages = this._sock.rQshift16();
var numClientMessages = this._sock.rQshift16();
var numEncodings = this._sock.rQshift16();
this._sock.rQskipBytes(2); // padding
var totalMessagesLength = (numServerMessages + numClientMessages + numEncodings) * 16;
if (this._sock.rQwait('TightVNC extended server init header', totalMessagesLength, 32 + name_length)) { return false; }
// we don't actually do anything with the capability information that TIGHT sends,
// so we just skip the all of this.
// TIGHT server message capabilities
this._sock.rQskipBytes(16 * numServerMessages);
// TIGHT client message capabilities
this._sock.rQskipBytes(16 * numClientMessages);
// TIGHT encoding capabilities
this._sock.rQskipBytes(16 * numEncodings);
}
// NB(directxman12): these are down here so that we don't run them multiple times
// if we backtrack
Util.Info("Screen: " + this._fb_width + "x" + this._fb_height +
", bpp: " + bpp + ", depth: " + depth +
", big_endian: " + big_endian +
", true_color: " + true_color +
", red_max: " + red_max +
", green_max: " + green_max +
", blue_max: " + blue_max +
", red_shift: " + red_shift +
", green_shift: " + green_shift +
", blue_shift: " + blue_shift);
if (big_endian !== 0) {
Util.Warn("Server native endian is not little endian");
}
if (red_shift !== 16) {
Util.Warn("Server native red-shift is not 16");
}
if (blue_shift !== 0) {
Util.Warn("Server native blue-shift is not 0");
}
// we're past the point where we could backtrack, so it's safe to call this
this._onDesktopName(this, this._fb_name);
if (this._true_color && this._fb_name === "Intel(r) AMT KVM") {
Util.Warn("Intel AMT KVM only supports 8/16 bit depths. Disabling true color");
this._true_color = false;
}
this._display.set_true_color(this._true_color);
this._display.resize(this._fb_width, this._fb_height);
this._onFBResize(this, this._fb_width, this._fb_height);
this._keyboard.grab();
this._mouse.grab();
if (this._true_color) {
this._fb_Bpp = 4;
this._fb_depth = 3;
} else {
this._fb_Bpp = 1;
this._fb_depth = 1;
}
RFB.messages.pixelFormat(this._sock, this._fb_Bpp, this._fb_depth, this._true_color);
RFB.messages.clientEncodings(this._sock, this._encodings, this._local_cursor, this._true_color);
RFB.messages.fbUpdateRequests(this._sock, this._display.getCleanDirtyReset(), this._fb_width, this._fb_height);
this._timing.fbu_rt_start = (new Date()).getTime();
this._timing.pixels = 0;
this._sock.flush();
if (this._encrypt) {
this._updateState('normal', 'Connected (encrypted) to: ' + this._fb_name);
} else {
this._updateState('normal', 'Connected (unencrypted) to: ' + this._fb_name);
}
},
_init_msg: function () {
switch (this._rfb_state) {
case 'ProtocolVersion':
return this._negotiate_protocol_version();
case 'Security':
return this._negotiate_security();
case 'Authentication':
return this._negotiate_authentication();
case 'SecurityResult':
return this._handle_security_result();
case 'ClientInitialisation':
this._sock.send([this._shared ? 1 : 0]); // ClientInitialisation
this._updateState('ServerInitialisation', "Authentication OK");
return true;
case 'ServerInitialisation':
return this._negotiate_server_init();
}
},
_handle_set_colour_map_msg: function () {
Util.Debug("SetColorMapEntries");
this._sock.rQskip8(); // Padding
var first_colour = this._sock.rQshift16();
var num_colours = this._sock.rQshift16();
if (this._sock.rQwait('SetColorMapEntries', num_colours * 6, 6)) { return false; }
for (var c = 0; c < num_colours; c++) {
var red = parseInt(this._sock.rQshift16() / 256, 10);
var green = parseInt(this._sock.rQshift16() / 256, 10);
var blue = parseInt(this._sock.rQshift16() / 256, 10);
this._display.set_colourMap([blue, green, red], first_colour + c);
}
Util.Debug("colourMap: " + this._display.get_colourMap());
Util.Info("Registered " + num_colours + " colourMap entries");
return true;
},
_handle_server_cut_text: function () {
Util.Debug("ServerCutText");
if (this._sock.rQwait("ServerCutText header", 7, 1)) { return false; }
this._sock.rQskipBytes(3); // Padding
var length = this._sock.rQshift32();
if (this._sock.rQwait("ServerCutText", length, 8)) { return false; }
var text = this._sock.rQshiftStr(length);
this._onClipboard(this, text);
return true;
},
_handle_xvp_msg: function () {
if (this._sock.rQwait("XVP version and message", 3, 1)) { return false; }
this._sock.rQskip8(); // Padding
var xvp_ver = this._sock.rQshift8();
var xvp_msg = this._sock.rQshift8();
switch (xvp_msg) {
case 0: // XVP_FAIL
this._updateState(this._rfb_state, "Operation Failed");
break;
case 1: // XVP_INIT
this._rfb_xvp_ver = xvp_ver;
Util.Info("XVP extensions enabled (version " + this._rfb_xvp_ver + ")");
this._onXvpInit(this._rfb_xvp_ver);
break;
default:
this._fail("Disconnected: illegal server XVP message " + xvp_msg);
break;
}
return true;
},
_normal_msg: function () {
var msg_type;
if (this._FBU.rects > 0) {
msg_type = 0;
} else {
msg_type = this._sock.rQshift8();
}
switch (msg_type) {
case 0: // FramebufferUpdate
var ret = this._framebufferUpdate();
if (ret) {
RFB.messages.fbUpdateRequests(this._sock, this._display.getCleanDirtyReset(), this._fb_width, this._fb_height);
this._sock.flush();
}
return ret;
case 1: // SetColorMapEntries
return this._handle_set_colour_map_msg();
case 2: // Bell
Util.Debug("Bell");
this._onBell(this);
return true;
case 3: // ServerCutText
return this._handle_server_cut_text();
case 250: // XVP
return this._handle_xvp_msg();
default:
this._fail("Disconnected: illegal server message type " + msg_type);
Util.Debug("sock.rQslice(0, 30): " + this._sock.rQslice(0, 30));
return true;
}
},
_framebufferUpdate: function () {
var ret = true;
var now;
if (this._FBU.rects === 0) {
if (this._sock.rQwait("FBU header", 3, 1)) { return false; }
this._sock.rQskip8(); // Padding
this._FBU.rects = this._sock.rQshift16();
this._FBU.bytes = 0;
this._timing.cur_fbu = 0;
if (this._timing.fbu_rt_start > 0) {
now = (new Date()).getTime();
Util.Info("First FBU latency: " + (now - this._timing.fbu_rt_start));
}
}
while (this._FBU.rects > 0) {
if (this._rfb_state !== "normal") { return false; }
if (this._sock.rQwait("FBU", this._FBU.bytes)) { return false; }
if (this._FBU.bytes === 0) {
if (this._sock.rQwait("rect header", 12)) { return false; }
/* New FramebufferUpdate */
var hdr = this._sock.rQshiftBytes(12);
this._FBU.x = (hdr[0] << 8) + hdr[1];
this._FBU.y = (hdr[2] << 8) + hdr[3];
this._FBU.width = (hdr[4] << 8) + hdr[5];
this._FBU.height = (hdr[6] << 8) + hdr[7];
this._FBU.encoding = parseInt((hdr[8] << 24) + (hdr[9] << 16) +
(hdr[10] << 8) + hdr[11], 10);
this._onFBUReceive(this,
{'x': this._FBU.x, 'y': this._FBU.y,
'width': this._FBU.width, 'height': this._FBU.height,
'encoding': this._FBU.encoding,
'encodingName': this._encNames[this._FBU.encoding]});
if (!this._encNames[this._FBU.encoding]) {
this._fail("Disconnected: unsupported encoding " +
this._FBU.encoding);
return false;
}
}
this._timing.last_fbu = (new Date()).getTime();
var handler = this._encHandlers[this._FBU.encoding];
try {
//ret = this._encHandlers[this._FBU.encoding]();
ret = handler();
} catch (ex) {
console.log("missed " + this._FBU.encoding + ": " + handler);
ret = this._encHandlers[this._FBU.encoding]();
}
now = (new Date()).getTime();
this._timing.cur_fbu += (now - this._timing.last_fbu);
if (ret) {
this._encStats[this._FBU.encoding][0]++;
this._encStats[this._FBU.encoding][1]++;
this._timing.pixels += this._FBU.width * this._FBU.height;
}
if (this._timing.pixels >= (this._fb_width * this._fb_height)) {
if ((this._FBU.width === this._fb_width && this._FBU.height === this._fb_height) ||
this._timing.fbu_rt_start > 0) {
this._timing.full_fbu_total += this._timing.cur_fbu;
this._timing.full_fbu_cnt++;
Util.Info("Timing of full FBU, curr: " +
this._timing.cur_fbu + ", total: " +
this._timing.full_fbu_total + ", cnt: " +
this._timing.full_fbu_cnt + ", avg: " +
(this._timing.full_fbu_total / this._timing.full_fbu_cnt));
}
if (this._timing.fbu_rt_start > 0) {
var fbu_rt_diff = now - this._timing.fbu_rt_start;
this._timing.fbu_rt_total += fbu_rt_diff;
this._timing.fbu_rt_cnt++;
Util.Info("full FBU round-trip, cur: " +
fbu_rt_diff + ", total: " +
this._timing.fbu_rt_total + ", cnt: " +
this._timing.fbu_rt_cnt + ", avg: " +
(this._timing.fbu_rt_total / this._timing.fbu_rt_cnt));
this._timing.fbu_rt_start = 0;
}
}
if (!ret) { return ret; } // need more data
}
this._onFBUComplete(this,
{'x': this._FBU.x, 'y': this._FBU.y,
'width': this._FBU.width, 'height': this._FBU.height,
'encoding': this._FBU.encoding,
'encodingName': this._encNames[this._FBU.encoding]});
return true; // We finished this FBU
},
};
Util.make_properties(RFB, [
['target', 'wo', 'dom'], // VNC display rendering Canvas object
['focusContainer', 'wo', 'dom'], // DOM element that captures keyboard input
['encrypt', 'rw', 'bool'],