Refactor data processing. Ignore other server messages.
- Refactor to pull off all the data received into RFB.d array and then process it. This allows a bit more flexibility in handling data that isn't sent in frame boundary packets. - Properly ignore these server messages: SetColourMapEntries, Bell, ServerCutText.
This commit is contained in:
Joel Martin
parent
d064769ccf
commit
484a4696aa
187
vnc.js
187
vnc.js
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@ -39,7 +39,7 @@ Array.prototype.shiftBytes = function (len) {
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}
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/*
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* Pending frame buffer update data
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* Frame buffer update state
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*/
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FBU = {
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rects : 0,
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@ -52,11 +52,10 @@ FBU = {
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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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arr : []};
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background: null};
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/*
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* Mouse state data
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* Mouse state
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*/
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Mouse = {
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buttonmask : 0,
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@ -71,6 +70,7 @@ Mouse = {
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RFB = {
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ws : null, // Web Socket object
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d : [], // Received data accumulator
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version : "RFB 003.003\n",
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state : 'ProtocolVersion',
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@ -93,35 +93,37 @@ rre_chunk : 100,
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*/
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/* RFB/VNC initialisation */
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init_msg: function (data) {
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init_msg: function () {
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console.log(">> init_msg: " + RFB.state);
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console.log("d:" + RFB.d);
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switch (RFB.state) {
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case 'ProtocolVersion' :
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if (data.length != 12) {
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if (RFB.d.length != 12) {
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console.log("Invalid protocol version from server");
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RFB.state = 'reset';
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return;
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}
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console.log("Server ProtocolVersion: " + data.shiftStr(11));
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var server_version = RFB.d.shiftStr(12);
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console.log("Server ProtocolVersion: " + server_version.substr(0,11));
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console.log("Sending ProtocolVersion: " + RFB.version.substr(0,11));
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RFB.send_string(RFB.version);
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RFB.state = 'Authentication';
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break;
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case 'Authentication' :
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if (data.length < 4) {
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if (RFB.d.length < 4) {
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console.log("Invalid auth frame");
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RFB.state = 'reset';
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return;
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}
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var scheme = data.shift32();
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var scheme = RFB.d.shift32();
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console.log("Auth scheme: " + scheme);
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switch (scheme) {
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case 0: // connection failed
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var strlen = data.shift32();
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var reason = data.shiftStr(strlen);
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var strlen = RFB.d.shift32();
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var reason = RFB.d.shiftStr(strlen);
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console.log("auth failed: " + reason);
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RFB.state = "failed";
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return;
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@ -130,7 +132,7 @@ init_msg: function (data) {
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RFB.state = "ServerInitialisation";
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break;
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case 2: // VNC authentication
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var challenge = data.shiftBytes(16);
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var challenge = RFB.d.shiftBytes(16);
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console.log("Password: " + RFB.password);
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console.log("Challenge: " + challenge + "(" + challenge.length + ")");
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passwd = RFB.passwdTwiddle(RFB.password);
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@ -141,16 +143,20 @@ init_msg: function (data) {
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RFB.send_array(response);
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RFB.state = "SecurityResult";
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break;
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default:
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console.log("Unsupported auth scheme");
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RFB.state = "failed";
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return;
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}
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break;
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case 'SecurityResult' :
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if (data.length != 4) {
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if (RFB.d.length != 4) {
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console.log("Invalid server auth response");
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RFB.state = 'reset';
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return;
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}
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var resp = data.shift32();
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var resp = RFB.d.shift32();
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switch (resp) {
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case 0: // OK
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console.log("Authentication OK");
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@ -169,24 +175,24 @@ init_msg: function (data) {
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break;
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case 'ServerInitialisation' :
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if (data.length < 24) {
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if (RFB.d.length < 24) {
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console.log("Invalid server initialisation");
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RFB.state = 'reset';
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return;
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}
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/* Screen size */
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//console.log("data: " + data);
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RFB.fb_width = data.shift16();
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RFB.fb_height = data.shift16();
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//console.log("RFB.d: " + RFB.d);
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RFB.fb_width = RFB.d.shift16();
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RFB.fb_height = RFB.d.shift16();
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console.log("Screen size: " + RFB.fb_width + "x" + RFB.fb_height);
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/* PIXEL_FORMAT */
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var bpp = data.shift8();
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var depth = data.shift8();
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var big_endian = data.shift8();
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var true_color = data.shift8();
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var bpp = RFB.d.shift8();
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var depth = RFB.d.shift8();
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var big_endian = RFB.d.shift8();
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var true_color = RFB.d.shift8();
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console.log("bpp: " + bpp);
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console.log("depth: " + depth);
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@ -194,9 +200,9 @@ init_msg: function (data) {
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console.log("true_color: " + true_color);
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/* Connection name/title */
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data.shiftStr(12);
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var name_length = data.shift32();
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RFB.fb_name = data.shiftStr(name_length);
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RFB.d.shiftStr(12);
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var name_length = RFB.d.shift32();
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RFB.fb_name = RFB.d.shiftStr(name_length);
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console.log("Name: " + RFB.fb_name);
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$('status').innerHTML = "Connected to: " + RFB.fb_name;
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@ -222,34 +228,34 @@ init_msg: function (data) {
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/* Framebuffer update display functions */
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display_raw: function () {
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console.log(">> display_raw");
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Canvas.rfbImage(FBU.x, FBU.y, FBU.width, FBU.height, FBU.arr);
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FBU.arr.splice(0, FBU.width * FBU.height * RFB.fb_Bpp);
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Canvas.rfbImage(FBU.x, FBU.y, FBU.width, FBU.height, RFB.d);
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RFB.d.splice(0, FBU.width * FBU.height * RFB.fb_Bpp);
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FBU.rects --;
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},
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display_copy_rect: function () {
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console.log(">> display_copy_rect");
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var old_x = FBU.arr.shift16();
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var old_y = FBU.arr.shift16();
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var old_x = RFB.d.shift16();
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var old_y = RFB.d.shift16();
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Canvas.copyImage(old_x, old_y, FBU.x, FBU.y, FBU.width, FBU.height);
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FBU.rects --;
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},
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display_rre: function () {
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//console.log(">> display_rre (" + FBU.arr.length + " bytes)");
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//console.log(">> display_rre (" + RFB.d.length + " bytes)");
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if (FBU.subrects == 0) {
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FBU.subrects = FBU.arr.shift32();
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FBU.subrects = RFB.d.shift32();
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console.log(">> display_rre " + "(" + FBU.subrects + " subrects)");
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var color = FBU.arr.shiftBytes(RFB.fb_Bpp); // Background
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var color = RFB.d.shiftBytes(RFB.fb_Bpp); // Background
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Canvas.rfbRect(FBU.x, FBU.y, FBU.width, FBU.height, color);
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}
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while ((FBU.subrects > 0) && (FBU.arr.length >= (RFB.fb_Bpp + 8))) {
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while ((FBU.subrects > 0) && (RFB.d.length >= (RFB.fb_Bpp + 8))) {
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FBU.subrects --;
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var color = FBU.arr.shiftBytes(RFB.fb_Bpp);
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var x = FBU.arr.shift16();
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var y = FBU.arr.shift16();
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var width = FBU.arr.shift16();
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var height = FBU.arr.shift16();
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var color = RFB.d.shiftBytes(RFB.fb_Bpp);
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var x = RFB.d.shift16();
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var y = RFB.d.shift16();
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var width = RFB.d.shift16();
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var height = RFB.d.shift16();
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Canvas.rfbRect(FBU.x + x, FBU.y + y, width, height, color);
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}
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//console.log(" display_rre: rects: " + FBU.rects + ", FBU.subrects: " + FBU.subrects);
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@ -264,11 +270,11 @@ display_rre: function () {
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},
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display_hextile: function() {
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//console.log(">> display_hextile, tiles: " + FBU.tiles + ", arr.length: " + FBU.arr.length + ", bytes: " + FBU.bytes);
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//console.log(">> display_hextile, tiles: " + FBU.tiles + ", arr.length: " + RFB.d.length + ", bytes: " + FBU.bytes);
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var subencoding, subrects, cur_tile, tile_x, x, w, tile_y, y, h;
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/* FBU.bytes comes in as 0, FBU.arr.length at least 2 */
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while ((FBU.tiles > 0) && (FBU.arr.length >= FBU.bytes)) {
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/* FBU.bytes comes in as 0, RFB.d.length at least 2 */
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while ((FBU.tiles > 0) && (RFB.d.length >= Math.max(2, FBU.bytes))) {
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cur_tile = FBU.total_tiles - FBU.tiles;
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tile_x = cur_tile % FBU.tiles_x;
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tile_y = Math.floor(cur_tile / FBU.tiles_x);
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@ -279,7 +285,7 @@ display_hextile: function() {
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subrects = 0;
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if (FBU.subencoding == -1) {
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/* We enter with at least 2 bytes */
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subencoding = FBU.arr[0]; // Peek
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subencoding = RFB.d[0]; // Peek
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//console.log(" display_hextile, subencoding: " + subencoding);
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FBU.bytes++; // Since we aren't shifting it off
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//console.log(" subencoding: " + subencoding);
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@ -293,11 +299,6 @@ display_hextile: function() {
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if (subencoding & 0x01) { // Raw
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//console.log(" Raw subencoding");
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FBU.bytes = w * h * RFB.fb_Bpp;
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if (FBU.arr[FBU.bytes] == 0) {
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/* Weird: ignore blanks after RAW */
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//console.log(" Ignoring blank after RAW");
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FBU.bytes ++;
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}
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} else {
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if (subencoding & 0x02) { // Background
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FBU.bytes += RFB.fb_Bpp;
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@ -307,12 +308,12 @@ display_hextile: function() {
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}
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if (subencoding & 0x08) { // AnySubrects
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FBU.bytes++; // Since we aren't shifting it off
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if (FBU.arr.length < FBU.bytes) {
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if (RFB.d.length < FBU.bytes) {
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/* Wait for subrects byte */
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//console.log(" waiting for subrects byte");
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return;
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}
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subrects = FBU.arr[FBU.bytes-1]; // Peek
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subrects = RFB.d[FBU.bytes-1]; // Peek
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if (subencoding & 0x10) { // SubrectsColoured
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FBU.bytes += subrects * (RFB.fb_Bpp + 2);
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} else {
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@ -322,44 +323,52 @@ display_hextile: function() {
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}
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}
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console.log(" tile:" + cur_tile + "/" + (FBU.total_tiles - 1) + ", subencoding:" + subencoding + ", subrects:" + subrects + ", tile:" + tile_x + "," + tile_y + " [" + x + "," + y + "], arr.length:" + FBU.arr.length + ", bytes:" + FBU.bytes);
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//console.log(" arr[0..30]: " + FBU.arr.slice(0,30));
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if (FBU.arr.length < FBU.bytes) {
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//console.log(" waiting for " + (FBU.bytes - FBU.arr.length) + "bytes");
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console.log(" tile:" + cur_tile + "/" + (FBU.total_tiles - 1) + ", subencoding:" + subencoding + "(last: " + FBU.lastsubencoding + "), subrects:" + subrects + ", tile:" + tile_x + "," + tile_y + " [" + x + "," + y + "], arr.length:" + RFB.d.length + ", bytes:" + FBU.bytes);
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//console.log(" arr[0..30]: " + RFB.d.slice(0,30));
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if (RFB.d.length < FBU.bytes) {
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//console.log(" waiting for " + (FBU.bytes - RFB.d.length) + "bytes");
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return;
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}
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if (subencoding > -1) {
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/* We know the encoding and have a whole tile */
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FBU.subencoding = FBU.arr.shift();
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FBU.subencoding = RFB.d.shift8();
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if (FBU.subencoding == 0) {
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Canvas.rfbRect(x, y, w, h, FBU.background);
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if (FBU.lastsubencoding & 0x01) {
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/* Weird: ignore blanks after RAW */
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console.log(" Ignoring blank after RAW");
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FBU.subencoding = -1;
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//FBU.lastsubencoding = 0;
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continue;
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} else {
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Canvas.rfbRect(x, y, w, h, FBU.background);
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}
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} else if (FBU.subencoding & 0x01) { // Raw
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Canvas.rfbImage(x, y, w, h, FBU.arr);
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FBU.arr.splice(0, FBU.bytes - 1);
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Canvas.rfbImage(x, y, w, h, RFB.d);
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RFB.d.splice(0, FBU.bytes - 1);
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} else {
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if (FBU.subencoding & 0x02) { // Background
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FBU.background = FBU.arr.shiftBytes(RFB.fb_Bpp);
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FBU.background = RFB.d.shiftBytes(RFB.fb_Bpp);
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//console.log(" background: " + FBU.background);
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}
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if (FBU.subencoding & 0x04) { // Foreground
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FBU.foreground = FBU.arr.shiftBytes(RFB.fb_Bpp);
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FBU.foreground = RFB.d.shiftBytes(RFB.fb_Bpp);
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//console.log(" foreground: " + FBU.foreground);
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}
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Canvas.rfbRect(x, y, w, h, FBU.background);
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if (FBU.subencoding & 0x08) { // AnySubrects
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subrects = FBU.arr.shift8();
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subrects = RFB.d.shift8();
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for (var i = 0; i < subrects; i ++) {
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if (FBU.subencoding & 0x10) { // SubrectsColoured
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var color = FBU.arr.shiftBytes(RFB.fb_Bpp);
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var color = RFB.d.shiftBytes(RFB.fb_Bpp);
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} else {
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var color = FBU.foreground;
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}
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var xy = FBU.arr.shift8();
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var xy = RFB.d.shift8();
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var sx = x + (xy >> 4);
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var sy = y + (xy & 0x0f);
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var wh = FBU.arr.shift8();
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var wh = RFB.d.shift8();
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var sw = (wh >> 4) + 1;
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var sh = (wh & 0x0f) + 1;
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@ -367,6 +376,7 @@ display_hextile: function() {
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}
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}
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}
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FBU.lastsubencoding = FBU.subencoding;
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FBU.subencoding = -1;
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FBU.tiles --;
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FBU.bytes = 0;
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@ -380,40 +390,36 @@ display_hextile: function() {
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FBU.rects --;
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}
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console.log("<< display_hextile, rects:" + FBU.rects);
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console.log("<< display_hextile, rects:" + FBU.rects, " d:" + RFB.d.slice(0,40));
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},
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/* Normal RFB/VNC messages */
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normal_msg: function (data) {
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normal_msg: function () {
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//console.log(">> normal_msg");
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if ((FBU.rects > 0) || (FBU.bytes > 0)) {
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var msg_type = 0;
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} else {
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var msg_type = data.shift8();
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var msg_type = RFB.d.shift8();
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}
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switch (msg_type) {
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case 0: // FramebufferUpdate
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if (FBU.rects == 0) {
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data.shift8();
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FBU.rects = data.shift16();
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RFB.d.shift8();
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FBU.rects = RFB.d.shift16();
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console.log("FramebufferUpdate, " + FBU.rects + " rects");
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FBU.bytes = 0;
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} else {
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//console.log("FramebufferUpdate continuation");
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}
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if (data.length > 0 ) {
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FBU.arr = FBU.arr.concat(data);
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}
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while ((FBU.rects > 0) && (FBU.arr.length > 0)) {
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while ((FBU.rects > 0) && (RFB.d.length > 0)) {
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if (FBU.bytes == 0) {
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FBU.x = FBU.arr.shift16();
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FBU.y = FBU.arr.shift16();
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FBU.width = FBU.arr.shift16();
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FBU.height = FBU.arr.shift16();
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FBU.encoding = parseInt(FBU.arr.shift32(), 10);
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FBU.x = RFB.d.shift16();
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FBU.y = RFB.d.shift16();
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FBU.width = RFB.d.shift16();
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FBU.height = RFB.d.shift16();
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FBU.encoding = parseInt(RFB.d.shift32(), 10);
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console.log("encoding: " + FBU.encoding);
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switch (FBU.encoding) {
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case 0: // Raw
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@ -438,9 +444,9 @@ normal_msg: function (data) {
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break;
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}
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}
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//console.log("FBU.arr.length: " + FBU.arr.length + ", FBU.bytes: " + FBU.bytes);
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//console.log("RFB.d.length: " + RFB.d.length + ", FBU.bytes: " + FBU.bytes);
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if (FBU.arr.length >= FBU.bytes) {
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if (RFB.d.length >= FBU.bytes) {
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//console.log('Done rect:');
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FBU.bytes = 0;
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@ -452,7 +458,7 @@ normal_msg: function (data) {
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}
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} else {
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/* We don't have enough yet */
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||||
FBU.bytes = FBU.bytes - data.length;
|
||||
FBU.bytes = FBU.bytes - RFB.d.length;
|
||||
break;
|
||||
}
|
||||
if (RFB.state != "normal") return;
|
||||
|
|
@ -461,16 +467,24 @@ normal_msg: function (data) {
|
|||
//console.log("Finished frame buffer update");
|
||||
break;
|
||||
case 1: // SetColourMapEntries
|
||||
console.log("SetColourMapEntries");
|
||||
console.log("SetColourMapEntries (unsupported)");
|
||||
RFB.d.shift8(); // Padding
|
||||
RFB.d.shift16(); // First colour
|
||||
var num_colours = RFB.d.shift16();
|
||||
RFB.d.shiftBytes(num_colours * 6);
|
||||
break;
|
||||
case 2: // Bell
|
||||
console.log("Bell");
|
||||
console.log("Bell (unsupported)");
|
||||
break;
|
||||
case 3: // ServerCutText
|
||||
console.log("ServerCutText");
|
||||
RFB.d.shiftBytes(3); // Padding
|
||||
var length = RFB.d.shift32();
|
||||
RFB.d.shiftBytes(length);
|
||||
break;
|
||||
default:
|
||||
console.log("Unknown server message type: " + msg_type);
|
||||
RFB.state = "failed";
|
||||
break;
|
||||
}
|
||||
//console.log("<< normal_msg");
|
||||
|
|
@ -679,12 +693,11 @@ init_ws: function () {
|
|||
RFB.ws = new WebSocket(uri);
|
||||
RFB.ws.onmessage = function(e) {
|
||||
//console.log(">> onmessage");
|
||||
var data = Base64.decode_array(e.data);
|
||||
//console.log("decoded array: " + data);
|
||||
RFB.d = RFB.d.concat(Base64.decode_array(e.data));
|
||||
if (RFB.state != 'normal') {
|
||||
RFB.init_msg(data);
|
||||
RFB.init_msg();
|
||||
} else {
|
||||
RFB.normal_msg(data);
|
||||
RFB.normal_msg();
|
||||
}
|
||||
if (RFB.state == 'reset') {
|
||||
/* close and reset connection */
|
||||
|
|
|
|||
Loading…
Reference in New Issue