// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package com.cloud.consoleproxy;
import java.io.IOException;
import java.net.URI;
import java.net.UnknownHostException;
import org.apache.log4j.Logger;
import com.cloud.consoleproxy.vnc.FrameBufferCanvas;
import com.cloud.consoleproxy.vnc.RfbConstants;
import com.cloud.consoleproxy.vnc.VncClient;
/**
*
* ConsoleProxyVncClient bridges a VNC engine with the front-end AJAX viewer
*
*/
public class ConsoleProxyVncClient extends ConsoleProxyClientBase {
private static final Logger s_logger = Logger.getLogger(ConsoleProxyVncClient.class);
private static final int SHIFT_KEY_MASK = 64;
private static final int CTRL_KEY_MASK = 128;
private static final int META_KEY_MASK = 256;
private static final int ALT_KEY_MASK = 512;
private static final int X11_KEY_SHIFT = 0xffe1;
private static final int X11_KEY_CTRL = 0xffe3;
private static final int X11_KEY_ALT = 0xffe9;
private static final int X11_KEY_META = 0xffe7;
private VncClient client;
private Thread worker;
private volatile boolean workerDone = false;
private int lastModifierStates = 0;
private int lastPointerMask = 0;
public ConsoleProxyVncClient() {
}
@Override
public boolean isHostConnected() {
if (client != null)
return client.isHostConnected();
return false;
}
@Override
public boolean isFrontEndAlive() {
if (workerDone || System.currentTimeMillis() - getClientLastFrontEndActivityTime() > ConsoleProxy.VIEWER_LINGER_SECONDS * 1000) {
s_logger.info("Front end has been idle for too long");
return false;
}
return true;
}
@Override
public void initClient(ConsoleProxyClientParam param) {
setClientParam(param);
client = new VncClient(this);
worker = new Thread(new Runnable() {
@Override
public void run() {
String tunnelUrl = getClientParam().getClientTunnelUrl();
String tunnelSession = getClientParam().getClientTunnelSession();
try {
if (tunnelUrl != null && !tunnelUrl.isEmpty() && tunnelSession != null && !tunnelSession.isEmpty()) {
URI uri = new URI(tunnelUrl);
s_logger.info("Connect to VNC server via tunnel. url: " + tunnelUrl + ", session: " + tunnelSession);
ConsoleProxy.ensureRoute(uri.getHost());
client.connectTo(
uri.getHost(), uri.getPort(),
uri.getPath() + "?" + uri.getQuery(),
tunnelSession, "https".equalsIgnoreCase(uri.getScheme()),
getClientHostPassword());
} else {
s_logger.info("Connect to VNC server directly. host: " + getClientHostAddress() + ", port: " + getClientHostPort());
ConsoleProxy.ensureRoute(getClientHostAddress());
client.connectTo(getClientHostAddress(), getClientHostPort(), getClientHostPassword());
}
} catch (UnknownHostException e) {
s_logger.error("Unexpected exception", e);
} catch (IOException e) {
s_logger.error("Unexpected exception", e);
} catch (Throwable e) {
s_logger.error("Unexpected exception", e);
}
s_logger.info("Receiver thread stopped.");
workerDone = true;
client.getClientListener().onClientClose();
}
});
worker.setDaemon(true);
worker.start();
}
@Override
public void closeClient() {
workerDone = true;
if (client != null)
client.shutdown();
}
@Override
public void onClientConnected() {
}
@Override
public void onClientClose() {
s_logger.info("Received client close indication. remove viewer from map.");
ConsoleProxy.removeViewer(this);
}
@Override
public void onFramebufferUpdate(int x, int y, int w, int h) {
super.onFramebufferUpdate(x, y, w, h);
client.requestUpdate(false);
}
@Override
public void sendClientRawKeyboardEvent(InputEventType event, int code, int modifiers) {
if (client == null)
return;
updateFrontEndActivityTime();
switch(event) {
case KEY_DOWN :
sendModifierEvents(modifiers);
client.sendClientKeyboardEvent(RfbConstants.KEY_DOWN, code, 0);
break;
case KEY_UP :
client.sendClientKeyboardEvent(RfbConstants.KEY_UP, code, 0);
sendModifierEvents(0);
break;
case KEY_PRESS :
break;
default :
assert(false);
break;
}
}
@Override
public void sendClientMouseEvent(InputEventType event, int x, int y, int code, int modifiers) {
if (client == null)
return;
updateFrontEndActivityTime();
if (event == InputEventType.MOUSE_DOWN) {
if (code == 2) {
lastPointerMask |= 4;
} else if (code == 0) {
lastPointerMask |= 1;
}
}
if (event == InputEventType.MOUSE_UP) {
if (code == 2) {
lastPointerMask ^= 4;
} else if (code == 0) {
lastPointerMask ^= 1;
}
}
sendModifierEvents(modifiers);
client.sendClientMouseEvent(lastPointerMask, x, y, code, modifiers);
if (lastPointerMask == 0)
sendModifierEvents(0);
}
@Override
protected FrameBufferCanvas getFrameBufferCavas() {
if (client != null)
return client.getFrameBufferCanvas();
return null;
}
private void sendModifierEvents(int modifiers) {
if ((modifiers & SHIFT_KEY_MASK) != (lastModifierStates & SHIFT_KEY_MASK))
client.sendClientKeyboardEvent((modifiers & SHIFT_KEY_MASK) != 0 ? RfbConstants.KEY_DOWN : RfbConstants.KEY_UP, X11_KEY_SHIFT, 0);
if((modifiers & CTRL_KEY_MASK) != (lastModifierStates & CTRL_KEY_MASK))
client.sendClientKeyboardEvent((modifiers & CTRL_KEY_MASK) != 0 ? RfbConstants.KEY_DOWN : RfbConstants.KEY_UP, X11_KEY_CTRL, 0);
if ((modifiers & META_KEY_MASK) != (lastModifierStates & META_KEY_MASK))
client.sendClientKeyboardEvent((modifiers & META_KEY_MASK) != 0 ? RfbConstants.KEY_DOWN : RfbConstants.KEY_UP, X11_KEY_META, 0);
if((modifiers & ALT_KEY_MASK) != (lastModifierStates & ALT_KEY_MASK))
client.sendClientKeyboardEvent((modifiers & ALT_KEY_MASK) != 0 ? RfbConstants.KEY_DOWN : RfbConstants.KEY_UP, X11_KEY_ALT, 0);
lastModifierStates = modifiers;
}
}