1623 lines
49 KiB
JavaScript
1623 lines
49 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', null, '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 bridge. Flash version: " +
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Util.Flash.version);
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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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* ClientInitialization - not triggered by server message
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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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function encode_message() {
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/* base64 encode */
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return Base64.encode(sQ);
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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");
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}
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}
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// Compact the queue
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|
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);
|
|
sQ = sQ.concat(arr);
|
|
if (ws.bufferedAmount === 0) {
|
|
//Util.Debug("arr: " + arr);
|
|
//Util.Debug("sQ: " + sQ);
|
|
ws.send(encode_message(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(encode_message(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: " + cversion);
|
|
break;
|
|
|
|
case 'Security' :
|
|
if (rfb_version >= 3.7) {
|
|
// Server sends supported list, client decides
|
|
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 {
|
|
// Server decides
|
|
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;
|
|
|
|
// Triggered by fallthough, not by server message
|
|
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
|
|
if (rfb_version >= 3.8) {
|
|
updateState('SecurityResult');
|
|
return;
|
|
} else {
|
|
// Fall through to ClientInitialisation
|
|
}
|
|
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');
|
|
return;
|
|
default:
|
|
fail("Unsupported auth scheme: " + rfb_auth_scheme);
|
|
return;
|
|
}
|
|
updateState('ClientInitialisation', "No auth required");
|
|
init_msg(); // Recursive fallthrough (workaround JSLint complaint)
|
|
break;
|
|
|
|
case 'SecurityResult' :
|
|
if (rQwait("VNC auth response ", 4)) { return false; }
|
|
switch (rQshift32()) {
|
|
case 0: // OK
|
|
// Fall through to ClientInitialisation
|
|
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");
|
|
}
|
|
updateState('ClientInitialisation', "Authentication OK");
|
|
init_msg(); // Recursive fallthrough (workaround JSLint complaint)
|
|
break;
|
|
|
|
// Triggered by fallthough, not by server message
|
|
case 'ClientInitialisation' :
|
|
send_array([conf.shared ? 1 : 0]); // ClientInitialisation
|
|
updateState('ServerInitialisation', "Authentication OK");
|
|
break;
|
|
|
|
case 'ServerInitialisation' :
|
|
if (rQwait("server initialization", 24)) { return false; }
|
|
|
|
/* 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()
|