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Do base64 encode/decode of stream. Send SetEncoding and FB update request.

This commit is contained in:
Joel Martin 2010-04-02 19:17:46 -05:00
parent a793fa460f
commit 489d167643
2 changed files with 94 additions and 35 deletions
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1
vnc.html
View File

@ -16,6 +16,7 @@
<script src="include/mootools.js"></script>
<script src="include/mootools-more.js"></script>
<script src="include/base64a.js"></script>
<script src="vnc.js"></script>
<script type="text/javascript">

128
vnc.js
View File

@ -3,46 +3,49 @@ var ws = null;
var vnc_host = '';
var vnc_port = 5900;
var rfb_state = 'ProtocolVersion';
var rfb_continue = -1;
var rfb_shared = 1;
var fb_width = 0;
var fb_height = 0;
var fb_name = "";
function card8(num) {
return String.fromCharCode(num);
Array.prototype.card8 = function (pos) {
return this[pos];
}
String.prototype.card8 = function (pos) {
return this.charCodeAt(pos);
Array.prototype.pushCard8 = function (num) {
this.push(num & 0xFF);
}
function card16(num) {
return String.fromCharCode(num >> 8) +
String.fromCharCode(num & 0xFF);
Array.prototype.card16 = function (pos) {
return (this[pos] << 8) +
(this[pos+1] );
}
String.prototype.card16 = function (pos) {
debug("card16 0: " + this.charCodeAt(pos));
debug("card16 1: " + this.charCodeAt(pos+1));
return (this.charCodeAt(pos) << 8) +
(this.charCodeAt(pos+1) );
Array.prototype.pushCard16 = function (num) {
this.push((num >> 8) & 0xFF,
(num ) & 0xFF );
}
function card32(num) {
return String.fromCharCode( num >> 24) +
String.fromCharCode((num >> 16) & 0xFF) +
String.fromCharCode((num >> 8) & 0xFF) +
String.fromCharCode( num & 0xFF);
Array.prototype.card32 = function (pos) {
return (this[pos] << 24) +
(this[pos+1] << 16) +
(this[pos+2] << 8) +
(this[pos+3] );
}
String.prototype.card32 = function (pos) {
debug("card32 0: " + this.charCodeAt(pos));
debug("card32 1: " + this.charCodeAt(pos+1));
debug("card32 2: " + this.charCodeAt(pos+2));
debug("card32 3: " + this.charCodeAt(pos+3));
return (this.charCodeAt(pos) << 24) +
(this.charCodeAt(pos+1) << 16) +
(this.charCodeAt(pos+2) << 8) +
(this.charCodeAt(pos+3) );
Array.prototype.pushCard32 = function (num) {
this.push((num >> 24) & 0xFF,
(num >> 16) & 0xFF,
(num >> 8) & 0xFF,
(num ) & 0xFF );
}
Array.prototype.substr = function (start, len) {
return this.slice(start, start+len).map(
function (num) { return String.fromCharCode(num); } ).join('');
}
function debug(str) {
cell = $('debug');
cell.innerHTML += str + "<br/>";
@ -56,6 +59,7 @@ function debug(str) {
/* RFB/VNC initialisation */
function rfb_init_msg(data) {
debug(">> rfb_init_msg");
switch (rfb_state) {
case 'ProtocolVersion' :
@ -65,7 +69,7 @@ function rfb_init_msg(data) {
rfb_state = 'reset';
return;
}
ws.send("RFB 003.003\n");
send_string("RFB 003.003\n");
rfb_state = 'Authentication';
break;
@ -86,14 +90,14 @@ function rfb_init_msg(data) {
rfb_state = "reset";
return;
case 1: // no authentication
ws.send(card8(rfb_shared)); // ClientInitialisation
send_array([rfb_shared]); // ClientInitialisation
rfb_state = "ServerInitialisation";
break;
case 2: // VNC authentication
var challenge = data.substr(4, 16);
// TODO:
//var crypt = des(challenge, password);
//ws.send(crypt);
//send_string(crypt);
rfb_state = "Authentication-VNC";
break;
}
@ -120,7 +124,7 @@ function rfb_init_msg(data) {
rfb_state = "reset";
return;
}
ws.send(card8(rfb_shared)); // ClientInitialisation
send_array([rfb_shared]); // ClientInitialisation
rfb_state = "ServerInitialisation";
break;
@ -131,12 +135,35 @@ function rfb_init_msg(data) {
rfb_state = 'reset';
return;
}
/* Screen size */
debug("data: " + data);
fb_width = data.card16(0);
fb_height = data.card16(2);
debug("Screen size: " + fb_width + "x" + fb_height);
/* PIXEL_FORMAT */
var bits_per_pixel = data.card8(4);
var depth = data.card8(5);
var big_endian = data.card8(6);
var true_color = data.card8(7);
debug("bits per pixel: " + bits_per_pixel);
debug("depth: " + depth);
debug("big_endian: " + big_endian);
debug("true_color: " + true_color);
/* Connection name/title */
var name_length = data.card32(20);
fb_name = data.substr(24, name_length);
debug("Screen size: " + fb_width + "x" + fb_height);
debug("Name: " + fb_name);
setEncodings();
fbUpdateRequest(0, 0, 0, 10, 10);
rfb_state = 'normal';
break;
}
@ -146,7 +173,11 @@ function rfb_init_msg(data) {
/* Normal RFB/VNC messages */
function rfb_msg(data) {
debug(">> rfb_msg");
var msg_type = data.card8(0);
if (rfb_continue >= 0) {
var msg_type = rfb_continue;
} else
var msg_type = data.card8(0);
}
switch (msg_type) {
case 0: // FramebufferUpdate
debug("FramebufferUpdate");
@ -171,6 +202,15 @@ function rfb_msg(data) {
* Client message routines
*/
function send_string(str) {
ws.send(Base64.encode(str));
}
function send_array(arr) {
debug("encoded array: " + Base64.encode_array(arr));
ws.send(Base64.encode_array(arr));
}
function setPixelFormat() {
}
@ -178,9 +218,25 @@ function fixColourMapEntries() {
}
function setEncodings() {
debug(">> setEncodings");
var arr = [2]; // msg-type
arr.pushCard8(0); // padding
arr.pushCard16(1); // encoding count
arr.pushCard32(0); // raw encoding
send_array(arr);
debug("<< setEncodings");
}
function fbUpdateRequest() {
function fbUpdateRequest(incremental, x, y, xw, yw) {
debug(">> fbUpdateRequest");
var arr = [3]; // msg-type
arr.pushCard8(incremental);
arr.pushCard16(x);
arr.pushCard16(y);
arr.pushCard16(xw);
arr.pushCard16(yw);
send_array(arr);
debug("<< fbUpdateRequest");
}
function keyEvent() {
@ -204,10 +260,12 @@ function _init_ws() {
ws = new WebSocket(uri);
ws.onmessage = function(e) {
debug(">> onmessage");
var data = Base64.decode_array(e.data);
//debug("decoded array: " + data);
if (rfb_state != 'normal') {
rfb_init_msg(e.data);
rfb_init_msg(data);
} else {
rfb_msg(e.data);
rfb_msg(data);
}
if (rfb_state == 'reset') {
/* close and reset connection */