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f1a9971c82
If shared mode is false, then the server should disconnect other connections before the current connection is allowed to proceed.
1608 lines
48 KiB
JavaScript
1608 lines
48 KiB
JavaScript
/*
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* noVNC: HTML5 VNC client
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* Copyright (C) 2010 Joel Martin
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* Licensed under LGPL-3 (see LICENSE.txt)
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*
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* See README.md for usage and integration instructions.
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*/
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"use strict";
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/*jslint white: false, browser: true, bitwise: false, plusplus: false */
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/*global window, WebSocket, Util, Canvas, VNC_native_ws, Base64, DES */
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function RFB(conf) {
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conf = conf || {}; // Configuration
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var that = {}, // Public API interface
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// Pre-declare private functions used before definitions (jslint)
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init_vars, updateState, init_msg, normal_msg, recv_message,
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framebufferUpdate, print_stats,
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pixelFormat, clientEncodings, fbUpdateRequest,
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keyEvent, pointerEvent, clientCutText,
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extract_data_uri, scan_tight_imgQ,
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send_array, checkEvents, // Overridable for testing
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//
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// Private RFB namespace variables
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//
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rfb_host = '',
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rfb_port = 5900,
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rfb_password = '',
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rfb_state = 'disconnected',
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rfb_version = 0,
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rfb_max_version= 3.8,
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rfb_auth_scheme= '',
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// In preference order
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encodings = [
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['COPYRECT', 0x01 ],
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['TIGHT_PNG', -260 ],
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['HEXTILE', 0x05 ],
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['RRE', 0x02 ],
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['RAW', 0x00 ],
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['DesktopSize', -223 ],
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['Cursor', -239 ],
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// Psuedo-encoding settings
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['JPEG_quality_lo', -32 ],
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//['JPEG_quality_hi', -23 ],
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['compress_lo', -255 ]
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//['compress_hi', -247 ]
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],
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encHandlers = {},
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encNames = {},
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encStats = {}, // [rectCnt, rectCntTot]
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ws = null, // Web Socket object
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canvas = null, // Canvas object
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sendTimer = null, // Send Queue check timer
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connTimer = null, // connection timer
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disconnTimer = null, // disconnection timer
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msgTimer = null, // queued handle_message timer
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// Receive and send queues
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rQ = [], // Receive Queue
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rQi = 0, // Receive Queue Index
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rQmax = 100000, // Max size before compacting
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sQ = "", // Send Queue
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// Frame buffer update state
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FBU = {
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rects : 0,
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subrects : 0, // RRE
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lines : 0, // RAW
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tiles : 0, // HEXTILE
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bytes : 0,
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x : 0,
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y : 0,
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width : 0,
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height : 0,
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encoding : 0,
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subencoding : -1,
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background : null,
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imgQ : [] // TIGHT_PNG image queue
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},
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fb_Bpp = 4,
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fb_depth = 3,
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fb_width = 0,
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fb_height = 0,
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fb_name = "",
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scan_imgQ_rate = 100,
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last_req_time = 0,
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rre_chunk_sz = 100,
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timing = {
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last_fbu : 0,
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fbu_total : 0,
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fbu_total_cnt : 0,
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full_fbu_total : 0,
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full_fbu_cnt : 0,
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fbu_rt_start : 0,
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fbu_rt_total : 0,
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fbu_rt_cnt : 0
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},
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test_mode = false,
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/* Mouse state */
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mouse_buttonMask = 0,
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mouse_arr = [];
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//
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// Configuration settings
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//
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function cdef(v, type, defval, desc) {
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Util.conf_default(conf, that, v, type, defval, desc); }
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cdef('target', 'str', 'VNC_canvas', 'VNC viewport rendering Canvas');
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cdef('focusContainer', 'dom', document, 'Area that traps keyboard input');
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cdef('encrypt', 'bool', false, 'Use TLS/SSL/wss encryption');
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cdef('true_color', 'bool', true, 'Request true color pixel data');
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cdef('local_cursor', 'bool', false, 'Request locally rendered cursor');
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cdef('shared', 'bool', true, 'Request shared mode');
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cdef('connectTimeout', 'int', 2, 'Time (s) to wait for connection');
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cdef('disconnectTimeout', 'int', 3, 'Time (s) to wait for disconnection');
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cdef('check_rate', 'int', 217, 'Timing (ms) of send/receive check');
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cdef('fbu_req_rate', 'int', 1413, 'Timing (ms) of frameBufferUpdate requests');
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cdef('updateState',
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'func', function() { Util.Debug("updateState stub"); },
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'callback: state update');
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cdef('clipboardReceive',
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'func', function() { Util.Debug("clipboardReceive stub"); },
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'callback: clipboard contents received');
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// Override/add some specific getters/setters
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that.set_local_cursor = function(cursor) {
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if ((!cursor) || (cursor in {'0':1, 'no':1, 'false':1})) {
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conf.local_cursor = false;
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} else {
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if (canvas.get_cursor_uri()) {
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conf.local_cursor = true;
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} else {
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Util.Warn("Browser does not support local cursor");
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}
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}
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};
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that.get_canvas = function() {
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return canvas;
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};
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//
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// Private functions
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//
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//
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// Receive Queue functions
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//
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function rQlen() {
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return rQ.length - rQi;
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}
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function rQshift16() {
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return (rQ[rQi++] << 8) +
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(rQ[rQi++] );
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}
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function rQshift32() {
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return (rQ[rQi++] << 24) +
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(rQ[rQi++] << 16) +
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(rQ[rQi++] << 8) +
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(rQ[rQi++] );
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}
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function rQshiftStr(len) {
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var arr = rQ.slice(rQi, rQi + len);
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rQi += len;
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return arr.map(function (num) {
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return String.fromCharCode(num); } ).join('');
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}
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function rQshiftBytes(len) {
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rQi += len;
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return rQ.slice(rQi-len, rQi);
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}
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// Check to see if we must wait for 'num' bytes (default to FBU.bytes)
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// to be available in the receive queue. Return true if we need to
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// wait (and possibly print a debug message), otherwise false.
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function rQwait(msg, num, goback) {
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if (typeof num !== 'number') { num = FBU.bytes; }
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var rQlen = rQ.length - rQi; // Skip rQlen() function call
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if (rQlen < num) {
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if (goback) {
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if (rQi < goback) {
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throw("rQwait cannot backup " + goback + " bytes");
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}
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rQi -= goback;
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}
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//Util.Debug(" waiting for " + (num-rQlen) +
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// " " + msg + " byte(s)");
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return true; // true means need more data
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}
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return false;
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}
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//
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// Setup routines
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//
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// Create the public API interface and initialize
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function constructor() {
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var i, rmode;
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Util.Debug(">> RFB.constructor");
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// Create lookup tables based encoding number
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for (i=0; i < encodings.length; i+=1) {
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encHandlers[encodings[i][1]] = encHandlers[encodings[i][0]];
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encNames[encodings[i][1]] = encodings[i][0];
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encStats[encodings[i][1]] = [0, 0];
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}
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// Initialize canvas
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try {
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canvas = new Canvas({'target': conf.target,
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'focusContainer': conf.focusContainer});
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} catch (exc) {
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Util.Error("Canvas exception: " + exc);
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updateState('fatal', "No working Canvas");
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}
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rmode = canvas.get_render_mode();
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init_vars();
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/* Check web-socket-js if no builtin WebSocket support */
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if (VNC_native_ws) {
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Util.Info("Using native WebSockets");
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updateState('loaded', 'noVNC ready: native WebSockets, ' + rmode);
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} else {
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Util.Warn("Using web-socket-js flash bridge");
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if ((! Util.Flash) ||
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(Util.Flash.version < 9)) {
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updateState('fatal', "WebSockets or Adobe Flash is required");
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} else if (document.location.href.substr(0, 7) === "file://") {
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updateState('fatal',
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"'file://' URL is incompatible with Adobe Flash");
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} else {
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updateState('loaded', 'noVNC ready: WebSockets emulation, ' + rmode);
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}
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}
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Util.Debug("<< RFB.constructor");
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return that; // Return the public API interface
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}
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function init_ws() {
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Util.Debug(">> RFB.init_ws");
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var uri = "";
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if (conf.encrypt) {
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uri = "wss://";
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} else {
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uri = "ws://";
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}
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uri += rfb_host + ":" + rfb_port + "/";
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Util.Info("connecting to " + uri);
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ws = new WebSocket(uri);
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ws.onmessage = recv_message;
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ws.onopen = function(e) {
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Util.Debug(">> WebSocket.onopen");
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if (rfb_state === "connect") {
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updateState('ProtocolVersion', "Starting VNC handshake");
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} else {
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fail("Got unexpected WebSockets connection");
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}
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Util.Debug("<< WebSocket.onopen");
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};
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ws.onclose = function(e) {
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Util.Debug(">> WebSocket.onclose");
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if (rfb_state === 'disconnect') {
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updateState('disconnected', 'VNC disconnected');
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} else if (rfb_state === 'ProtocolVersion') {
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fail('Failed to connect to server');
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} else if (rfb_state in {'failed':1, 'disconnected':1}) {
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Util.Error("Received onclose while disconnected");
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} else {
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fail('Server disconnected');
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}
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Util.Debug("<< WebSocket.onclose");
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};
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ws.onerror = function(e) {
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Util.Debug(">> WebSocket.onerror");
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fail("WebSocket error");
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Util.Debug("<< WebSocket.onerror");
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};
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Util.Debug("<< RFB.init_ws");
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}
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init_vars = function() {
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/* Reset state */
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rQ = [];
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rQi = 0;
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sQ = "";
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FBU.rects = 0;
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FBU.subrects = 0; // RRE and HEXTILE
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FBU.lines = 0; // RAW
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FBU.tiles = 0; // HEXTILE
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FBU.imgQ = []; // TIGHT_PNG image queue
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mouse_buttonMask = 0;
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mouse_arr = [];
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// Clear the per connection encoding stats
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for (var i=0; i < encodings.length; i+=1) {
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encStats[encodings[i][1]][0] = 0;
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}
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};
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// Print statistics
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print_stats = function() {
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var i, encName, s;
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Util.Info("Encoding stats for this connection:");
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for (i=0; i < encodings.length; i+=1) {
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s = encStats[encodings[i][1]];
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if ((s[0] + s[1]) > 0) {
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Util.Info(" " + encodings[i][0] + ": " +
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s[0] + " rects");
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}
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}
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Util.Info("Encoding stats since page load:");
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for (i=0; i < encodings.length; i+=1) {
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s = encStats[encodings[i][1]];
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if ((s[0] + s[1]) > 0) {
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Util.Info(" " + encodings[i][0] + ": "
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+ s[1] + " rects");
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}
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}
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};
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//
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// Utility routines
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//
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/*
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* Running states:
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* disconnected - idle state
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* normal - connected
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*
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* Page states:
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* loaded - page load, equivalent to disconnected
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* connect - starting initialization
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* disconnect - starting disconnect
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* failed - abnormal transition to disconnected
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* fatal - failed to load page, or fatal error
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*
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* VNC initialization states:
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* ProtocolVersion
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* Security
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* Authentication
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* password - waiting for password, not part of RFB
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* SecurityResult
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* ServerInitialization
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*/
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updateState = function(state, statusMsg) {
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var func, cmsg, oldstate = rfb_state;
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if (state === oldstate) {
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/* Already here, ignore */
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Util.Debug("Already in state '" + state + "', ignoring.");
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return;
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}
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/*
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* These are disconnected states. A previous connect may
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* asynchronously cause a connection so make sure we are closed.
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*/
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if (state in {'disconnected':1, 'loaded':1, 'connect':1,
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'disconnect':1, 'failed':1, 'fatal':1}) {
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if (sendTimer) {
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clearInterval(sendTimer);
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sendTimer = null;
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}
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if (msgTimer) {
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clearInterval(msgTimer);
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msgTimer = null;
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}
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if (canvas && canvas.getContext()) {
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canvas.stop();
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if (Util.get_logging() !== 'debug') {
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canvas.clear();
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}
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}
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if (ws) {
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if ((ws.readyState === WebSocket.OPEN) ||
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(ws.readyState === WebSocket.CONNECTING)) {
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Util.Info("Closing WebSocket connection");
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ws.close();
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}
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ws.onmessage = function (e) { return; };
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}
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}
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if (oldstate === 'fatal') {
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Util.Error("Fatal error, cannot continue");
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}
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if ((state === 'failed') || (state === 'fatal')) {
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func = Util.Error;
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} else {
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func = Util.Warn;
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}
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if ((oldstate === 'failed') && (state === 'disconnected')) {
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// Do disconnect action, but stay in failed state.
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rfb_state = 'failed';
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} else {
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rfb_state = state;
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}
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cmsg = typeof(statusMsg) !== 'undefined' ? (" Msg: " + statusMsg) : "";
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func("New state '" + rfb_state + "', was '" + oldstate + "'." + cmsg);
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if (connTimer && (rfb_state !== 'connect')) {
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Util.Debug("Clearing connect timer");
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clearInterval(connTimer);
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connTimer = null;
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}
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if (disconnTimer && (rfb_state !== 'disconnect')) {
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Util.Debug("Clearing disconnect timer");
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clearInterval(disconnTimer);
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disconnTimer = null;
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}
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switch (state) {
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case 'normal':
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if ((oldstate === 'disconnected') || (oldstate === 'failed')) {
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Util.Error("Invalid transition from 'disconnected' or 'failed' to 'normal'");
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}
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break;
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case 'connect':
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connTimer = setTimeout(function () {
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fail("Connect timeout");
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}, conf.connectTimeout * 1000);
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init_vars();
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init_ws();
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// WebSocket.onopen transitions to 'ProtocolVersion'
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break;
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case 'disconnect':
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if (! test_mode) {
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disconnTimer = setTimeout(function () {
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fail("Disconnect timeout");
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}, conf.disconnectTimeout * 1000);
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}
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print_stats();
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// WebSocket.onclose transitions to 'disconnected'
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break;
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case 'failed':
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if (oldstate === 'disconnected') {
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Util.Error("Invalid transition from 'disconnected' to 'failed'");
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}
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if (oldstate === 'normal') {
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Util.Error("Error while connected.");
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}
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if (oldstate === 'init') {
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Util.Error("Error while initializing.");
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}
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// Make sure we transition to disconnected
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setTimeout(function() { updateState('disconnected'); }, 50);
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break;
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default:
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// No state change action to take
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}
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if ((oldstate === 'failed') && (state === 'disconnected')) {
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// Leave the failed message
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conf.updateState(that, state, oldstate);
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} else {
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conf.updateState(that, state, oldstate, statusMsg);
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}
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};
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function fail(msg) {
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updateState('failed', msg);
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return false;
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}
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|
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function encode_message(arr) {
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/* base64 encode */
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sQ = sQ + Base64.encode(arr);
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}
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|
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function decode_message(data) {
|
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//Util.Debug(">> decode_message: " + data);
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/* base64 decode */
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rQ = rQ.concat(Base64.decode(data, 0));
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//Util.Debug(">> decode_message, rQ: " + rQ);
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}
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function handle_message() {
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//Util.Debug("rQ.slice(rQi,rQi+20): " + rQ.slice(rQi,rQi+20) + " (" + rQlen() + ")");
|
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if (rQlen() === 0) {
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Util.Warn("handle_message called on empty receive queue");
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return;
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}
|
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switch (rfb_state) {
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case 'disconnected':
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case 'failed':
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Util.Error("Got data while disconnected");
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break;
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case 'normal':
|
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if (normal_msg() && rQlen() > 0) {
|
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// true means we can continue processing
|
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// Give other events a chance to run
|
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if (msgTimer === null) {
|
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Util.Debug("More data to process, creating timer");
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msgTimer = setTimeout(function () {
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msgTimer = null;
|
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handle_message();
|
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}, 10);
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} else {
|
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Util.Debug("More data to process, existing timer");
|
|
}
|
|
}
|
|
// Compact the queue
|
|
if (rQ.length > rQmax) {
|
|
//Util.Debug("Compacting receive queue");
|
|
rQ = rQ.slice(rQi);
|
|
rQi = 0;
|
|
}
|
|
break;
|
|
default:
|
|
init_msg();
|
|
break;
|
|
}
|
|
}
|
|
|
|
recv_message = function(e) {
|
|
//Util.Debug(">> recv_message: " + e.data.length);
|
|
|
|
try {
|
|
decode_message(e.data);
|
|
if (rQlen() > 0) {
|
|
handle_message();
|
|
} else {
|
|
Util.Debug("Ignoring empty message");
|
|
}
|
|
} catch (exc) {
|
|
if (typeof exc.stack !== 'undefined') {
|
|
Util.Warn("recv_message, caught exception: " + exc.stack);
|
|
} else if (typeof exc.description !== 'undefined') {
|
|
Util.Warn("recv_message, caught exception: " + exc.description);
|
|
} else {
|
|
Util.Warn("recv_message, caught exception:" + exc);
|
|
}
|
|
if (typeof exc.name !== 'undefined') {
|
|
fail(exc.name + ": " + exc.message);
|
|
} else {
|
|
fail(exc);
|
|
}
|
|
}
|
|
//Util.Debug("<< recv_message");
|
|
};
|
|
|
|
// overridable for testing
|
|
send_array = function(arr) {
|
|
//Util.Debug(">> send_array: " + arr);
|
|
encode_message(arr);
|
|
if (ws.bufferedAmount === 0) {
|
|
//Util.Debug("arr: " + arr);
|
|
//Util.Debug("sQ: " + sQ);
|
|
ws.send(sQ);
|
|
sQ = "";
|
|
} else {
|
|
Util.Debug("Delaying send");
|
|
}
|
|
};
|
|
|
|
function send_string(str) {
|
|
//Util.Debug(">> send_string: " + str);
|
|
send_array(str.split('').map(
|
|
function (chr) { return chr.charCodeAt(0); } ) );
|
|
}
|
|
|
|
function genDES(password, challenge) {
|
|
var i, passwd = [], des;
|
|
for (i=0; i < password.length; i += 1) {
|
|
passwd.push(password.charCodeAt(i));
|
|
}
|
|
return (new DES(passwd)).encrypt(challenge);
|
|
}
|
|
|
|
function flushClient() {
|
|
if (mouse_arr.length > 0) {
|
|
//send_array(mouse_arr.concat(fbUpdateRequest(1)));
|
|
send_array(mouse_arr);
|
|
setTimeout(function() {
|
|
send_array(fbUpdateRequest(1));
|
|
}, 50);
|
|
|
|
mouse_arr = [];
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// overridable for testing
|
|
checkEvents = function() {
|
|
var now;
|
|
if (rfb_state === 'normal') {
|
|
if (! flushClient()) {
|
|
now = new Date().getTime();
|
|
if (now > last_req_time + conf.fbu_req_rate) {
|
|
last_req_time = now;
|
|
send_array(fbUpdateRequest(1));
|
|
}
|
|
}
|
|
}
|
|
setTimeout(checkEvents, conf.check_rate);
|
|
};
|
|
|
|
function keyPress(keysym, down) {
|
|
var arr;
|
|
arr = keyEvent(keysym, down);
|
|
arr = arr.concat(fbUpdateRequest(1));
|
|
send_array(arr);
|
|
}
|
|
|
|
function mouseButton(x, y, down, bmask) {
|
|
if (down) {
|
|
mouse_buttonMask |= bmask;
|
|
} else {
|
|
mouse_buttonMask ^= bmask;
|
|
}
|
|
mouse_arr = mouse_arr.concat( pointerEvent(x, y) );
|
|
flushClient();
|
|
}
|
|
|
|
function mouseMove(x, y) {
|
|
//Util.Debug('>> mouseMove ' + x + "," + y);
|
|
mouse_arr = mouse_arr.concat( pointerEvent(x, y) );
|
|
}
|
|
|
|
|
|
//
|
|
// Server message handlers
|
|
//
|
|
|
|
// RFB/VNC initialisation message handler
|
|
init_msg = function() {
|
|
//Util.Debug(">> init_msg [rfb_state '" + rfb_state + "']");
|
|
|
|
var strlen, reason, length, sversion, cversion,
|
|
i, types, num_types, challenge, response, bpp, depth,
|
|
big_endian, true_color, name_length;
|
|
|
|
//Util.Debug("rQ (" + rQlen() + ") " + rQ);
|
|
switch (rfb_state) {
|
|
|
|
case 'ProtocolVersion' :
|
|
if (rQlen() < 12) {
|
|
return fail("Incomplete protocol version");
|
|
}
|
|
sversion = rQshiftStr(12).substr(4,7);
|
|
Util.Info("Server ProtocolVersion: " + sversion);
|
|
switch (sversion) {
|
|
case "003.003": rfb_version = 3.3; break;
|
|
case "003.006": rfb_version = 3.3; break; // UltraVNC
|
|
case "003.007": rfb_version = 3.7; break;
|
|
case "003.008": rfb_version = 3.8; break;
|
|
default:
|
|
return fail("Invalid server version " + sversion);
|
|
}
|
|
if (rfb_version > rfb_max_version) {
|
|
rfb_version = rfb_max_version;
|
|
}
|
|
|
|
if (! test_mode) {
|
|
sendTimer = setInterval(function() {
|
|
// Send updates either at a rate of one update
|
|
// every 50ms, or whatever slower rate the network
|
|
// can handle.
|
|
if (ws.bufferedAmount === 0) {
|
|
if (sQ) {
|
|
ws.send(sQ);
|
|
sQ = "";
|
|
}
|
|
} else {
|
|
Util.Debug("Delaying send");
|
|
}
|
|
}, 50);
|
|
}
|
|
|
|
cversion = "00" + parseInt(rfb_version,10) +
|
|
".00" + ((rfb_version * 10) % 10);
|
|
send_string("RFB " + cversion + "\n");
|
|
updateState('Security', "Sent ProtocolVersion: " + sversion);
|
|
break;
|
|
|
|
case 'Security' :
|
|
if (rfb_version >= 3.7) {
|
|
num_types = rQ[rQi++];
|
|
if (rQwait("security type", num_types, 1)) { return false; }
|
|
if (num_types === 0) {
|
|
strlen = rQshift32();
|
|
reason = rQshiftStr(strlen);
|
|
return fail("Security failure: " + reason);
|
|
}
|
|
rfb_auth_scheme = 0;
|
|
types = rQshiftBytes(num_types);
|
|
Util.Debug("Server security types: " + types);
|
|
for (i=0; i < types.length; i+=1) {
|
|
if ((types[i] > rfb_auth_scheme) && (types[i] < 3)) {
|
|
rfb_auth_scheme = types[i];
|
|
}
|
|
}
|
|
if (rfb_auth_scheme === 0) {
|
|
return fail("Unsupported security types: " + types);
|
|
}
|
|
|
|
send_array([rfb_auth_scheme]);
|
|
} else {
|
|
if (rQwait("security scheme", 4)) { return false; }
|
|
rfb_auth_scheme = rQshift32();
|
|
}
|
|
updateState('Authentication',
|
|
"Authenticating using scheme: " + rfb_auth_scheme);
|
|
init_msg(); // Recursive fallthrough (workaround JSLint complaint)
|
|
break;
|
|
|
|
case 'Authentication' :
|
|
//Util.Debug("Security auth scheme: " + rfb_auth_scheme);
|
|
switch (rfb_auth_scheme) {
|
|
case 0: // connection failed
|
|
if (rQwait("auth reason", 4)) { return false; }
|
|
strlen = rQshift32();
|
|
reason = rQshiftStr(strlen);
|
|
return fail("Auth failure: " + reason);
|
|
case 1: // no authentication
|
|
updateState('SecurityResult');
|
|
break;
|
|
case 2: // VNC authentication
|
|
if (rfb_password.length === 0) {
|
|
updateState('password', "Password Required");
|
|
return;
|
|
}
|
|
if (rQwait("auth challenge", 16)) { return false; }
|
|
challenge = rQshiftBytes(16);
|
|
//Util.Debug("Password: " + rfb_password);
|
|
//Util.Debug("Challenge: " + challenge +
|
|
// " (" + challenge.length + ")");
|
|
response = genDES(rfb_password, challenge);
|
|
//Util.Debug("Response: " + response +
|
|
// " (" + response.length + ")");
|
|
|
|
//Util.Debug("Sending DES encrypted auth response");
|
|
send_array(response);
|
|
updateState('SecurityResult');
|
|
break;
|
|
default:
|
|
fail("Unsupported auth scheme: " + rfb_auth_scheme);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case 'SecurityResult' :
|
|
if (rQlen() < 4) {
|
|
return fail("Invalid VNC auth response");
|
|
}
|
|
switch (rQshift32()) {
|
|
case 0: // OK
|
|
updateState('ServerInitialisation', "Authentication OK");
|
|
break;
|
|
case 1: // failed
|
|
if (rfb_version >= 3.8) {
|
|
length = rQshift32();
|
|
if (rQwait("SecurityResult reason", length, 8)) {
|
|
return false;
|
|
}
|
|
reason = rQshiftStr(length);
|
|
fail(reason);
|
|
} else {
|
|
fail("Authentication failed");
|
|
}
|
|
return;
|
|
case 2: // too-many
|
|
return fail("Too many auth attempts");
|
|
}
|
|
send_array([conf.shared ? 1 : 0]); // ClientInitialisation
|
|
break;
|
|
|
|
case 'ServerInitialisation' :
|
|
if (rQlen() < 24) {
|
|
return fail("Invalid server initialisation");
|
|
}
|
|
|
|
/* Screen size */
|
|
fb_width = rQshift16();
|
|
fb_height = rQshift16();
|
|
|
|
/* PIXEL_FORMAT */
|
|
bpp = rQ[rQi++];
|
|
depth = rQ[rQi++];
|
|
big_endian = rQ[rQi++];
|
|
true_color = rQ[rQi++];
|
|
|
|
Util.Info("Screen: " + fb_width + "x" + fb_height +
|
|
", bpp: " + bpp + ", depth: " + depth +
|
|
", big_endian: " + big_endian +
|
|
", true_color: " + true_color);
|
|
|
|
/* Connection name/title */
|
|
rQshiftStr(12);
|
|
name_length = rQshift32();
|
|
fb_name = rQshiftStr(name_length);
|
|
|
|
canvas.resize(fb_width, fb_height, conf.true_color);
|
|
canvas.start(keyPress, mouseButton, mouseMove);
|
|
|
|
if (conf.true_color) {
|
|
fb_Bpp = 4;
|
|
fb_depth = 3;
|
|
} else {
|
|
fb_Bpp = 1;
|
|
fb_depth = 1;
|
|
}
|
|
|
|
response = pixelFormat();
|
|
response = response.concat(clientEncodings());
|
|
response = response.concat(fbUpdateRequest(0));
|
|
timing.fbu_rt_start = (new Date()).getTime();
|
|
send_array(response);
|
|
|
|
/* Start pushing/polling */
|
|
setTimeout(checkEvents, conf.check_rate);
|
|
setTimeout(scan_tight_imgQ, scan_imgQ_rate);
|
|
|
|
if (conf.encrypt) {
|
|
updateState('normal', "Connected (encrypted) to: " + fb_name);
|
|
} else {
|
|
updateState('normal', "Connected (unencrypted) to: " + fb_name);
|
|
}
|
|
break;
|
|
}
|
|
//Util.Debug("<< init_msg");
|
|
};
|
|
|
|
|
|
/* Normal RFB/VNC server message handler */
|
|
normal_msg = function() {
|
|
//Util.Debug(">> normal_msg");
|
|
|
|
var ret = true, msg_type, length,
|
|
c, first_colour, num_colours, red, green, blue;
|
|
|
|
if (FBU.rects > 0) {
|
|
msg_type = 0;
|
|
} else {
|
|
msg_type = rQ[rQi++];
|
|
}
|
|
switch (msg_type) {
|
|
case 0: // FramebufferUpdate
|
|
ret = framebufferUpdate(); // false means need more data
|
|
break;
|
|
case 1: // SetColourMapEntries
|
|
Util.Debug("SetColourMapEntries");
|
|
rQi++; // Padding
|
|
first_colour = rQshift16(); // First colour
|
|
num_colours = rQshift16();
|
|
for (c=0; c < num_colours; c+=1) {
|
|
red = rQshift16();
|
|
//Util.Debug("red before: " + red);
|
|
red = parseInt(red / 256, 10);
|
|
//Util.Debug("red after: " + red);
|
|
green = parseInt(rQshift16() / 256, 10);
|
|
blue = parseInt(rQshift16() / 256, 10);
|
|
canvas.set_colourMap([red, green, blue], first_colour + c);
|
|
}
|
|
Util.Info("Registered " + num_colours + " colourMap entries");
|
|
//Util.Debug("colourMap: " + canvas.get_colourMap());
|
|
break;
|
|
case 2: // Bell
|
|
Util.Warn("Bell (unsupported)");
|
|
break;
|
|
case 3: // ServerCutText
|
|
Util.Debug("ServerCutText");
|
|
if (rQwait("ServerCutText header", 7, 1)) { return false; }
|
|
rQshiftBytes(3); // Padding
|
|
length = rQshift32();
|
|
if (rQwait("ServerCutText", length, 8)) { return false; }
|
|
|
|
conf.clipboardReceive(that, rQshiftStr(length));
|
|
break;
|
|
default:
|
|
fail("Disconnected: illegal server message type " + msg_type);
|
|
Util.Debug("rQ.slice(0,30):" + rQ.slice(0,30));
|
|
break;
|
|
}
|
|
//Util.Debug("<< normal_msg");
|
|
return ret;
|
|
};
|
|
|
|
framebufferUpdate = function() {
|
|
var now, hdr, fbu_rt_diff, ret = true;
|
|
|
|
if (FBU.rects === 0) {
|
|
//Util.Debug("New FBU: rQ.slice(0,20): " + rQ.slice(0,20));
|
|
if (rQwait("FBU header", 3)) {
|
|
if (rQi === 0) {
|
|
rQ.unshift(0); // FBU msg_type
|
|
} else {
|
|
rQi -= 1;
|
|
}
|
|
return false;
|
|
}
|
|
rQi++;
|
|
FBU.rects = rQshift16();
|
|
//Util.Debug("FramebufferUpdate, rects:" + FBU.rects);
|
|
FBU.bytes = 0;
|
|
timing.cur_fbu = 0;
|
|
if (timing.fbu_rt_start > 0) {
|
|
now = (new Date()).getTime();
|
|
Util.Info("First FBU latency: " + (now - timing.fbu_rt_start));
|
|
}
|
|
}
|
|
|
|
while (FBU.rects > 0) {
|
|
if (rfb_state !== "normal") {
|
|
return false;
|
|
}
|
|
if (rQwait("FBU")) { return false; }
|
|
if (FBU.bytes === 0) {
|
|
if (rQwait("rect header", 12)) { return false; }
|
|
/* New FramebufferUpdate */
|
|
|
|
hdr = rQshiftBytes(12);
|
|
FBU.x = (hdr[0] << 8) + hdr[1];
|
|
FBU.y = (hdr[2] << 8) + hdr[3];
|
|
FBU.width = (hdr[4] << 8) + hdr[5];
|
|
FBU.height = (hdr[6] << 8) + hdr[7];
|
|
FBU.encoding = parseInt((hdr[8] << 24) + (hdr[9] << 16) +
|
|
(hdr[10] << 8) + hdr[11], 10);
|
|
|
|
if (encNames[FBU.encoding]) {
|
|
// Debug:
|
|
/*
|
|
var msg = "FramebufferUpdate rects:" + FBU.rects;
|
|
msg += " x: " + FBU.x + " y: " + FBU.y;
|
|
msg += " width: " + FBU.width + " height: " + FBU.height;
|
|
msg += " encoding:" + FBU.encoding;
|
|
msg += "(" + encNames[FBU.encoding] + ")";
|
|
msg += ", rQlen(): " + rQlen();
|
|
Util.Debug(msg);
|
|
*/
|
|
} else {
|
|
fail("Disconnected: unsupported encoding " +
|
|
FBU.encoding);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
timing.last_fbu = (new Date()).getTime();
|
|
|
|
ret = encHandlers[FBU.encoding]();
|
|
|
|
now = (new Date()).getTime();
|
|
timing.cur_fbu += (now - timing.last_fbu);
|
|
|
|
if (ret) {
|
|
encStats[FBU.encoding][0] += 1;
|
|
encStats[FBU.encoding][1] += 1;
|
|
}
|
|
|
|
if (FBU.rects === 0) {
|
|
if (((FBU.width === fb_width) &&
|
|
(FBU.height === fb_height)) ||
|
|
(timing.fbu_rt_start > 0)) {
|
|
timing.full_fbu_total += timing.cur_fbu;
|
|
timing.full_fbu_cnt += 1;
|
|
Util.Info("Timing of full FBU, cur: " +
|
|
timing.cur_fbu + ", total: " +
|
|
timing.full_fbu_total + ", cnt: " +
|
|
timing.full_fbu_cnt + ", avg: " +
|
|
(timing.full_fbu_total /
|
|
timing.full_fbu_cnt));
|
|
}
|
|
if (timing.fbu_rt_start > 0) {
|
|
fbu_rt_diff = now - timing.fbu_rt_start;
|
|
timing.fbu_rt_total += fbu_rt_diff;
|
|
timing.fbu_rt_cnt += 1;
|
|
Util.Info("full FBU round-trip, cur: " +
|
|
fbu_rt_diff + ", total: " +
|
|
timing.fbu_rt_total + ", cnt: " +
|
|
timing.fbu_rt_cnt + ", avg: " +
|
|
(timing.fbu_rt_total /
|
|
timing.fbu_rt_cnt));
|
|
timing.fbu_rt_start = 0;
|
|
}
|
|
}
|
|
if (! ret) {
|
|
return ret; // false ret means need more data
|
|
}
|
|
}
|
|
return true; // We finished this FBU
|
|
};
|
|
|
|
//
|
|
// FramebufferUpdate encodings
|
|
//
|
|
|
|
encHandlers.RAW = function display_raw() {
|
|
//Util.Debug(">> display_raw (" + rQlen() + " bytes)");
|
|
|
|
var cur_y, cur_height;
|
|
|
|
if (FBU.lines === 0) {
|
|
FBU.lines = FBU.height;
|
|
}
|
|
FBU.bytes = FBU.width * fb_Bpp; // At least a line
|
|
if (rQwait("RAW")) { return false; }
|
|
cur_y = FBU.y + (FBU.height - FBU.lines);
|
|
cur_height = Math.min(FBU.lines,
|
|
Math.floor(rQlen()/(FBU.width * fb_Bpp)));
|
|
canvas.blitImage(FBU.x, cur_y, FBU.width, cur_height, rQ, rQi);
|
|
rQshiftBytes(FBU.width * cur_height * fb_Bpp);
|
|
FBU.lines -= cur_height;
|
|
|
|
if (FBU.lines > 0) {
|
|
FBU.bytes = FBU.width * fb_Bpp; // At least another line
|
|
} else {
|
|
FBU.rects -= 1;
|
|
FBU.bytes = 0;
|
|
}
|
|
//Util.Debug("<< display_raw (" + rQlen() + " bytes)");
|
|
return true;
|
|
};
|
|
|
|
encHandlers.COPYRECT = function display_copy_rect() {
|
|
//Util.Debug(">> display_copy_rect");
|
|
|
|
var old_x, old_y;
|
|
|
|
if (rQwait("COPYRECT", 4)) { return false; }
|
|
old_x = rQshift16();
|
|
old_y = rQshift16();
|
|
canvas.copyImage(old_x, old_y, FBU.x, FBU.y, FBU.width, FBU.height);
|
|
FBU.rects -= 1;
|
|
FBU.bytes = 0;
|
|
return true;
|
|
};
|
|
|
|
encHandlers.RRE = function display_rre() {
|
|
//Util.Debug(">> display_rre (" + rQlen() + " bytes)");
|
|
var color, x, y, width, height, chunk;
|
|
|
|
if (FBU.subrects === 0) {
|
|
if (rQwait("RRE", 4+fb_Bpp)) { return false; }
|
|
FBU.subrects = rQshift32();
|
|
color = rQshiftBytes(fb_Bpp); // Background
|
|
canvas.fillRect(FBU.x, FBU.y, FBU.width, FBU.height, color);
|
|
}
|
|
while ((FBU.subrects > 0) && (rQlen() >= (fb_Bpp + 8))) {
|
|
color = rQshiftBytes(fb_Bpp);
|
|
x = rQshift16();
|
|
y = rQshift16();
|
|
width = rQshift16();
|
|
height = rQshift16();
|
|
canvas.fillRect(FBU.x + x, FBU.y + y, width, height, color);
|
|
FBU.subrects -= 1;
|
|
}
|
|
//Util.Debug(" display_rre: rects: " + FBU.rects +
|
|
// ", FBU.subrects: " + FBU.subrects);
|
|
|
|
if (FBU.subrects > 0) {
|
|
chunk = Math.min(rre_chunk_sz, FBU.subrects);
|
|
FBU.bytes = (fb_Bpp + 8) * chunk;
|
|
} else {
|
|
FBU.rects -= 1;
|
|
FBU.bytes = 0;
|
|
}
|
|
//Util.Debug("<< display_rre, FBU.bytes: " + FBU.bytes);
|
|
return true;
|
|
};
|
|
|
|
encHandlers.HEXTILE = function display_hextile() {
|
|
//Util.Debug(">> display_hextile");
|
|
var subencoding, subrects, tile, color, cur_tile,
|
|
tile_x, x, w, tile_y, y, h, xy, s, sx, sy, wh, sw, sh;
|
|
|
|
if (FBU.tiles === 0) {
|
|
FBU.tiles_x = Math.ceil(FBU.width/16);
|
|
FBU.tiles_y = Math.ceil(FBU.height/16);
|
|
FBU.total_tiles = FBU.tiles_x * FBU.tiles_y;
|
|
FBU.tiles = FBU.total_tiles;
|
|
}
|
|
|
|
/* FBU.bytes comes in as 1, rQlen() at least 1 */
|
|
while (FBU.tiles > 0) {
|
|
FBU.bytes = 1;
|
|
if (rQwait("HEXTILE subencoding")) { return false; }
|
|
//Util.Debug(" 2 rQ length: " + rQlen() + " rQ[rQi]: " + rQ[rQi] + " rQ.slice(rQi,rQi+20): " + rQ.slice(rQi,rQi+20) + ", FBU.rects: " + FBU.rects + ", FBU.tiles: " + FBU.tiles);
|
|
subencoding = rQ[rQi]; // Peek
|
|
if (subencoding > 30) { // Raw
|
|
fail("Disconnected: illegal hextile subencoding " + subencoding);
|
|
//Util.Debug("rQ.slice(0,30):" + rQ.slice(0,30));
|
|
return false;
|
|
}
|
|
subrects = 0;
|
|
cur_tile = FBU.total_tiles - FBU.tiles;
|
|
tile_x = cur_tile % FBU.tiles_x;
|
|
tile_y = Math.floor(cur_tile / FBU.tiles_x);
|
|
x = FBU.x + tile_x * 16;
|
|
y = FBU.y + tile_y * 16;
|
|
w = Math.min(16, (FBU.x + FBU.width) - x);
|
|
h = Math.min(16, (FBU.y + FBU.height) - y);
|
|
|
|
/* Figure out how much we are expecting */
|
|
if (subencoding & 0x01) { // Raw
|
|
//Util.Debug(" Raw subencoding");
|
|
FBU.bytes += w * h * fb_Bpp;
|
|
} else {
|
|
if (subencoding & 0x02) { // Background
|
|
FBU.bytes += fb_Bpp;
|
|
}
|
|
if (subencoding & 0x04) { // Foreground
|
|
FBU.bytes += fb_Bpp;
|
|
}
|
|
if (subencoding & 0x08) { // AnySubrects
|
|
FBU.bytes += 1; // Since we aren't shifting it off
|
|
if (rQwait("hextile subrects header")) { return false; }
|
|
subrects = rQ[rQi + FBU.bytes-1]; // Peek
|
|
if (subencoding & 0x10) { // SubrectsColoured
|
|
FBU.bytes += subrects * (fb_Bpp + 2);
|
|
} else {
|
|
FBU.bytes += subrects * 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
Util.Debug(" tile:" + cur_tile + "/" + (FBU.total_tiles - 1) +
|
|
" (" + tile_x + "," + tile_y + ")" +
|
|
" [" + x + "," + y + "]@" + w + "x" + h +
|
|
", subenc:" + subencoding +
|
|
"(last: " + FBU.lastsubencoding + "), subrects:" +
|
|
subrects +
|
|
", rQlen():" + rQlen() + ", FBU.bytes:" + FBU.bytes +
|
|
" last:" + rQ.slice(FBU.bytes-10, FBU.bytes) +
|
|
" next:" + rQ.slice(FBU.bytes-1, FBU.bytes+10));
|
|
*/
|
|
if (rQwait("hextile")) { return false; }
|
|
|
|
/* We know the encoding and have a whole tile */
|
|
FBU.subencoding = rQ[rQi];
|
|
rQi += 1;
|
|
if (FBU.subencoding === 0) {
|
|
if (FBU.lastsubencoding & 0x01) {
|
|
/* Weird: ignore blanks after RAW */
|
|
Util.Debug(" Ignoring blank after RAW");
|
|
} else {
|
|
canvas.fillRect(x, y, w, h, FBU.background);
|
|
}
|
|
} else if (FBU.subencoding & 0x01) { // Raw
|
|
canvas.blitImage(x, y, w, h, rQ, rQi);
|
|
rQi += FBU.bytes - 1;
|
|
} else {
|
|
if (FBU.subencoding & 0x02) { // Background
|
|
FBU.background = rQ.slice(rQi, rQi + fb_Bpp);
|
|
rQi += fb_Bpp;
|
|
}
|
|
if (FBU.subencoding & 0x04) { // Foreground
|
|
FBU.foreground = rQ.slice(rQi, rQi + fb_Bpp);
|
|
rQi += fb_Bpp;
|
|
}
|
|
|
|
tile = canvas.getTile(x, y, w, h, FBU.background);
|
|
if (FBU.subencoding & 0x08) { // AnySubrects
|
|
subrects = rQ[rQi];
|
|
rQi += 1;
|
|
for (s = 0; s < subrects; s += 1) {
|
|
if (FBU.subencoding & 0x10) { // SubrectsColoured
|
|
color = rQ.slice(rQi, rQi + fb_Bpp);
|
|
rQi += fb_Bpp;
|
|
} else {
|
|
color = FBU.foreground;
|
|
}
|
|
xy = rQ[rQi];
|
|
rQi += 1;
|
|
sx = (xy >> 4);
|
|
sy = (xy & 0x0f);
|
|
|
|
wh = rQ[rQi];
|
|
rQi += 1;
|
|
sw = (wh >> 4) + 1;
|
|
sh = (wh & 0x0f) + 1;
|
|
|
|
canvas.setSubTile(tile, sx, sy, sw, sh, color);
|
|
}
|
|
}
|
|
canvas.putTile(tile);
|
|
}
|
|
//rQshiftBytes(FBU.bytes);
|
|
FBU.lastsubencoding = FBU.subencoding;
|
|
FBU.bytes = 0;
|
|
FBU.tiles -= 1;
|
|
}
|
|
|
|
if (FBU.tiles === 0) {
|
|
FBU.rects -= 1;
|
|
}
|
|
|
|
//Util.Debug("<< display_hextile");
|
|
return true;
|
|
};
|
|
|
|
|
|
encHandlers.TIGHT_PNG = function display_tight_png() {
|
|
//Util.Debug(">> display_tight_png");
|
|
var ctl, cmode, clength, getCLength, color, img;
|
|
//Util.Debug(" FBU.rects: " + FBU.rects);
|
|
//Util.Debug(" starting rQ.slice(rQi,rQi+20): " + rQ.slice(rQi,rQi+20) + " (" + rQlen() + ")");
|
|
|
|
FBU.bytes = 1; // compression-control byte
|
|
if (rQwait("TIGHT compression-control")) { return false; }
|
|
|
|
// Get 'compact length' header and data size
|
|
getCLength = function (arr, offset) {
|
|
var header = 1, data = 0;
|
|
data += arr[offset + 0] & 0x7f;
|
|
if (arr[offset + 0] & 0x80) {
|
|
header += 1;
|
|
data += (arr[offset + 1] & 0x7f) << 7;
|
|
if (arr[offset + 1] & 0x80) {
|
|
header += 1;
|
|
data += arr[offset + 2] << 14;
|
|
}
|
|
}
|
|
return [header, data];
|
|
};
|
|
|
|
ctl = rQ[rQi];
|
|
switch (ctl >> 4) {
|
|
case 0x08: cmode = "fill"; break;
|
|
case 0x09: cmode = "jpeg"; break;
|
|
case 0x0A: cmode = "png"; break;
|
|
default: throw("Illegal basic compression received, ctl: " + ctl);
|
|
}
|
|
switch (cmode) {
|
|
// fill uses fb_depth because TPIXELs drop the padding byte
|
|
case "fill": FBU.bytes += fb_depth; break; // TPIXEL
|
|
case "jpeg": FBU.bytes += 3; break; // max clength
|
|
case "png": FBU.bytes += 3; break; // max clength
|
|
}
|
|
|
|
if (rQwait("TIGHT " + cmode)) { return false; }
|
|
|
|
//Util.Debug(" rQ.slice(0,20): " + rQ.slice(0,20) + " (" + rQlen() + ")");
|
|
//Util.Debug(" cmode: " + cmode);
|
|
|
|
// Determine FBU.bytes
|
|
switch (cmode) {
|
|
case "fill":
|
|
rQi++; // shift off ctl
|
|
color = rQshiftBytes(fb_depth);
|
|
canvas.fillRect(FBU.x, FBU.y, FBU.width, FBU.height, color);
|
|
break;
|
|
case "jpeg":
|
|
case "png":
|
|
clength = getCLength(rQ, rQi+1);
|
|
FBU.bytes = 1 + clength[0] + clength[1]; // ctl + clength size + jpeg-data
|
|
if (rQwait("TIGHT " + cmode)) { return false; }
|
|
|
|
// We have everything, render it
|
|
//Util.Debug(" png, rQlen(): " + rQlen() + ", clength[0]: " + clength[0] + ", clength[1]: " + clength[1]);
|
|
rQshiftBytes(1 + clength[0]); // shift off ctl + compact length
|
|
img = new Image();
|
|
img.onload = scan_tight_imgQ;
|
|
FBU.imgQ.push([img, FBU.x, FBU.y]);
|
|
img.src = "data:image/" + cmode +
|
|
extract_data_uri(rQshiftBytes(clength[1]));
|
|
img = null;
|
|
break;
|
|
}
|
|
FBU.bytes = 0;
|
|
FBU.rects -= 1;
|
|
//Util.Debug(" ending rQ.slice(rQi,rQi+20): " + rQ.slice(rQi,rQi+20) + " (" + rQlen() + ")");
|
|
//Util.Debug("<< display_tight_png");
|
|
return true;
|
|
};
|
|
|
|
extract_data_uri = function(arr) {
|
|
//var i, stra = [];
|
|
//for (i=0; i< arr.length; i += 1) {
|
|
// stra.push(String.fromCharCode(arr[i]));
|
|
//}
|
|
//return "," + escape(stra.join(''));
|
|
return ";base64," + Base64.encode(arr);
|
|
};
|
|
|
|
scan_tight_imgQ = function() {
|
|
var img, imgQ, ctx;
|
|
ctx = canvas.getContext();
|
|
if (rfb_state === 'normal') {
|
|
imgQ = FBU.imgQ;
|
|
while ((imgQ.length > 0) && (imgQ[0][0].complete)) {
|
|
img = imgQ.shift();
|
|
ctx.drawImage(img[0], img[1], img[2]);
|
|
}
|
|
setTimeout(scan_tight_imgQ, scan_imgQ_rate);
|
|
}
|
|
};
|
|
|
|
encHandlers.DesktopSize = function set_desktopsize() {
|
|
Util.Debug(">> set_desktopsize");
|
|
fb_width = FBU.width;
|
|
fb_height = FBU.height;
|
|
canvas.clear();
|
|
canvas.resize(fb_width, fb_height);
|
|
timing.fbu_rt_start = (new Date()).getTime();
|
|
// Send a new non-incremental request
|
|
send_array(fbUpdateRequest(0));
|
|
|
|
FBU.bytes = 0;
|
|
FBU.rects -= 1;
|
|
|
|
Util.Debug("<< set_desktopsize");
|
|
return true;
|
|
};
|
|
|
|
encHandlers.Cursor = function set_cursor() {
|
|
var x, y, w, h, pixelslength, masklength;
|
|
//Util.Debug(">> set_cursor");
|
|
x = FBU.x; // hotspot-x
|
|
y = FBU.y; // hotspot-y
|
|
w = FBU.width;
|
|
h = FBU.height;
|
|
|
|
pixelslength = w * h * fb_Bpp;
|
|
masklength = Math.floor((w + 7) / 8) * h;
|
|
|
|
FBU.bytes = pixelslength + masklength;
|
|
if (rQwait("cursor encoding")) { return false; }
|
|
|
|
//Util.Debug(" set_cursor, x: " + x + ", y: " + y + ", w: " + w + ", h: " + h);
|
|
|
|
canvas.changeCursor(rQshiftBytes(pixelslength),
|
|
rQshiftBytes(masklength),
|
|
x, y, w, h);
|
|
|
|
FBU.bytes = 0;
|
|
FBU.rects -= 1;
|
|
|
|
//Util.Debug("<< set_cursor");
|
|
return true;
|
|
};
|
|
|
|
encHandlers.JPEG_quality_lo = function set_jpeg_quality() {
|
|
Util.Error("Server sent jpeg_quality pseudo-encoding");
|
|
};
|
|
|
|
encHandlers.compress_lo = function set_compress_level() {
|
|
Util.Error("Server sent compress level pseudo-encoding");
|
|
};
|
|
|
|
/*
|
|
* Client message routines
|
|
*/
|
|
|
|
pixelFormat = function() {
|
|
//Util.Debug(">> pixelFormat");
|
|
var arr;
|
|
arr = [0]; // msg-type
|
|
arr.push8(0); // padding
|
|
arr.push8(0); // padding
|
|
arr.push8(0); // padding
|
|
|
|
arr.push8(fb_Bpp * 8); // bits-per-pixel
|
|
arr.push8(fb_depth * 8); // depth
|
|
arr.push8(0); // little-endian
|
|
arr.push8(conf.true_color ? 1 : 0); // true-color
|
|
|
|
arr.push16(255); // red-max
|
|
arr.push16(255); // green-max
|
|
arr.push16(255); // blue-max
|
|
arr.push8(0); // red-shift
|
|
arr.push8(8); // green-shift
|
|
arr.push8(16); // blue-shift
|
|
|
|
arr.push8(0); // padding
|
|
arr.push8(0); // padding
|
|
arr.push8(0); // padding
|
|
//Util.Debug("<< pixelFormat");
|
|
return arr;
|
|
};
|
|
|
|
clientEncodings = function() {
|
|
//Util.Debug(">> clientEncodings");
|
|
var arr, i, encList = [];
|
|
|
|
for (i=0; i<encodings.length; i += 1) {
|
|
if ((encodings[i][0] === "Cursor") &&
|
|
(! conf.local_cursor)) {
|
|
Util.Debug("Skipping Cursor pseudo-encoding");
|
|
} else {
|
|
//Util.Debug("Adding encoding: " + encodings[i][0]);
|
|
encList.push(encodings[i][1]);
|
|
}
|
|
}
|
|
|
|
arr = [2]; // msg-type
|
|
arr.push8(0); // padding
|
|
|
|
arr.push16(encList.length); // encoding count
|
|
for (i=0; i < encList.length; i += 1) {
|
|
arr.push32(encList[i]);
|
|
}
|
|
//Util.Debug("<< clientEncodings: " + arr);
|
|
return arr;
|
|
};
|
|
|
|
fbUpdateRequest = function(incremental, x, y, xw, yw) {
|
|
//Util.Debug(">> fbUpdateRequest");
|
|
if (!x) { x = 0; }
|
|
if (!y) { y = 0; }
|
|
if (!xw) { xw = fb_width; }
|
|
if (!yw) { yw = fb_height; }
|
|
var arr;
|
|
arr = [3]; // msg-type
|
|
arr.push8(incremental);
|
|
arr.push16(x);
|
|
arr.push16(y);
|
|
arr.push16(xw);
|
|
arr.push16(yw);
|
|
//Util.Debug("<< fbUpdateRequest");
|
|
return arr;
|
|
};
|
|
|
|
keyEvent = function(keysym, down) {
|
|
//Util.Debug(">> keyEvent, keysym: " + keysym + ", down: " + down);
|
|
var arr;
|
|
arr = [4]; // msg-type
|
|
arr.push8(down);
|
|
arr.push16(0);
|
|
arr.push32(keysym);
|
|
//Util.Debug("<< keyEvent");
|
|
return arr;
|
|
};
|
|
|
|
pointerEvent = function(x, y) {
|
|
//Util.Debug(">> pointerEvent, x,y: " + x + "," + y +
|
|
// " , mask: " + mouse_buttonMask);
|
|
var arr;
|
|
arr = [5]; // msg-type
|
|
arr.push8(mouse_buttonMask);
|
|
arr.push16(x);
|
|
arr.push16(y);
|
|
//Util.Debug("<< pointerEvent");
|
|
return arr;
|
|
};
|
|
|
|
clientCutText = function(text) {
|
|
//Util.Debug(">> clientCutText");
|
|
var arr, i, n;
|
|
arr = [6]; // msg-type
|
|
arr.push8(0); // padding
|
|
arr.push8(0); // padding
|
|
arr.push8(0); // padding
|
|
arr.push32(text.length);
|
|
n = text.length;
|
|
for (i=0; i < n; i+=1) {
|
|
arr.push(text.charCodeAt(i));
|
|
}
|
|
//Util.Debug("<< clientCutText:" + arr);
|
|
return arr;
|
|
};
|
|
|
|
|
|
|
|
//
|
|
// Public API interface functions
|
|
//
|
|
|
|
that.connect = function(host, port, password) {
|
|
//Util.Debug(">> connect");
|
|
|
|
rfb_host = host;
|
|
rfb_port = port;
|
|
rfb_password = (password !== undefined) ? password : "";
|
|
|
|
if ((!rfb_host) || (!rfb_port)) {
|
|
return fail("Must set host and port");
|
|
}
|
|
|
|
updateState('connect');
|
|
//Util.Debug("<< connect");
|
|
|
|
};
|
|
|
|
that.disconnect = function() {
|
|
//Util.Debug(">> disconnect");
|
|
updateState('disconnect', 'Disconnecting');
|
|
//Util.Debug("<< disconnect");
|
|
};
|
|
|
|
that.sendPassword = function(passwd) {
|
|
rfb_password = passwd;
|
|
rfb_state = "Authentication";
|
|
setTimeout(init_msg, 1);
|
|
};
|
|
|
|
that.sendCtrlAltDel = function() {
|
|
if (rfb_state !== "normal") { return false; }
|
|
Util.Info("Sending Ctrl-Alt-Del");
|
|
var arr = [];
|
|
arr = arr.concat(keyEvent(0xFFE3, 1)); // Control
|
|
arr = arr.concat(keyEvent(0xFFE9, 1)); // Alt
|
|
arr = arr.concat(keyEvent(0xFFFF, 1)); // Delete
|
|
arr = arr.concat(keyEvent(0xFFFF, 0)); // Delete
|
|
arr = arr.concat(keyEvent(0xFFE9, 0)); // Alt
|
|
arr = arr.concat(keyEvent(0xFFE3, 0)); // Control
|
|
arr = arr.concat(fbUpdateRequest(1));
|
|
send_array(arr);
|
|
};
|
|
|
|
// Send a key press. If 'down' is not specified then send a down key
|
|
// followed by an up key.
|
|
that.sendKey = function(code, down) {
|
|
if (rfb_state !== "normal") { return false; }
|
|
var arr = [];
|
|
if (typeof down !== 'undefined') {
|
|
Util.Info("Sending key code (" + (down ? "down" : "up") + "): " + code);
|
|
arr = arr.concat(keyEvent(code, down ? 1 : 0));
|
|
} else {
|
|
Util.Info("Sending key code (down + up): " + code);
|
|
arr = arr.concat(keyEvent(code, 1));
|
|
arr = arr.concat(keyEvent(code, 0));
|
|
}
|
|
arr = arr.concat(fbUpdateRequest(1));
|
|
send_array(arr);
|
|
};
|
|
|
|
that.clipboardPasteFrom = function(text) {
|
|
if (rfb_state !== "normal") { return; }
|
|
//Util.Debug(">> clipboardPasteFrom: " + text.substr(0,40) + "...");
|
|
send_array(clientCutText(text));
|
|
//Util.Debug("<< clipboardPasteFrom");
|
|
};
|
|
|
|
that.testMode = function(override_send_array) {
|
|
// Overridable internal functions for testing
|
|
test_mode = true;
|
|
send_array = override_send_array;
|
|
that.recv_message = recv_message; // Expose it
|
|
|
|
checkEvents = function () { /* Stub Out */ };
|
|
that.connect = function(host, port, password) {
|
|
rfb_host = host;
|
|
rfb_port = port;
|
|
rfb_password = password;
|
|
updateState('ProtocolVersion', "Starting VNC handshake");
|
|
};
|
|
};
|
|
|
|
|
|
return constructor(); // Return the public API interface
|
|
|
|
} // End of RFB()
|