mirror of
https://github.com/xcp-ng/xenadmin.git
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657 lines
25 KiB
C#
657 lines
25 KiB
C#
/* Copyright (c) Citrix Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Text;
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using System.Net;
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using System.Windows.Forms;
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using System.IO;
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using System.Threading;
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using System.Runtime.InteropServices;
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using Microsoft.Win32;
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using System.Reflection;
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using DotNetVnc;
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using XenAdmin;
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using XenAdmin.ConsoleView;
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using XenAdmin.Core;
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using XenAPI;
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namespace XenAdmin
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{
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/// <summary>
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/// XenServer hosted VM console events interface
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/// </summary>
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[Guid("4CF54BB1-3A27-4fe6-9BEC-03BD404AF367")]
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[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
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[ComVisible(true)]
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public interface IVMConsoleEvents
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{
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[DispIdAttribute(0x60020000)]
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void OnDisconnectedCallbackEvent(int EventID, string DisconnectReason);
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[DispIdAttribute(0x60020001)]
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void OnResolutionChangeCallbackEvent(string NewResolution);
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}
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/// <summary>
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/// XenServer hosted VM console access interface
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/// </summary>
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[Guid("FFD87368-B188-4921-BE52-B3F75967FC89")]
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[InterfaceType(ComInterfaceType.InterfaceIsDual)]
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[ComVisible(true)]
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public interface IVMConsole
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{
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#region interface functions
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bool Connect(string server, int port, string vm_uuid, string username, string password, int width, int height, bool show_border);
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bool ConnectConsole(string consoleuri, int width, int height, bool show_border);
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bool Disconnect();
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bool CanConnect(); /* may not be necessary */
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string GetVMResolution();
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bool IsConnected();
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void SendCtrlAltDel();
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#endregion
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}
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/// <summary>
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/// Class that implements the Active-X interface and allows a COM client
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/// to connect to the VNC console of a XenServer hosted VM.
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/// </summary>
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[Guid("D52D9588-AB6E-425b-9D8C-74FBDA46C4F8")]
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[ProgId("XenAdmin.VNCControl")]
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[ClassInterface(ClassInterfaceType.None)]
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[ComVisible(true)]
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[ComSourceInterfaces(typeof(IVMConsoleEvents))]
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public partial class VNCControl : UserControl, IVMConsole
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{
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#region Properties and Events
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// consts
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private const string SESSION_INVALID = "SESSION_INVALID";
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private const string HOST_IS_SLAVE = "HOST_IS_SLAVE";
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private const string HANDLE_INVALID = "HANDLE_INVALID";
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private const int SHORT_RETRY_COUNT = 10;
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private const int SHORT_RETRY_SLEEP_TIME = 100;
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private const int RETRY_SLEEP_TIME = 5000;
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private const int VNC_PORT = 5900;
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public MethodInvoker OnDetectVNC = null;
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public String m_vncIP = null;
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private VNCGraphicsClient m_vncClient = null;
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private static readonly log4net.ILog Log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
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// Xen API related properties
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private XenAPI.Session m_session = null;
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private char[] m_vncPassword = null;
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private XenAPI.VM m_sourceVM = null;
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private bool m_sourceIsPV = false;
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//private bool UseSource = true; /* use VNC endpoint on host as opposed to guest */
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// Event Handlers
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private Dictionary<Set<int>, MethodInvoker> extraScans = new Dictionary<Set<int>, MethodInvoker>();
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private Dictionary<Set<Keys>, MethodInvoker> extraCodes = new Dictionary<Set<Keys>, MethodInvoker>();
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private Set<int> pressedScans = new Set<int>();
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#endregion // Properties
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#region Initializers and constructors
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public VNCControl()
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{
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InitializeComponent();
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initSubControl(0, 0, true, true);
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}
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/// <summary>
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/// Creates the actual VNC client control.
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/// </summary>
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private void initSubControl(int width, int height, bool scaling, bool show_border)
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{
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Program.MainWindow = this;
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bool wasFocused = m_vncClient != null && m_vncClient.Focused;
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this.Controls.Clear();
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Size newSize;
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Size oldSize = new Size(1024, 768);
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if (width == 0 || height == 0)
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newSize = new Size(1024, 768);
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else
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newSize = new Size(width, height);
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// Kill the old client.
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if (m_vncClient != null)
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{
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oldSize = m_vncClient.DesktopSize;
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m_vncClient.Disconnect();
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m_vncClient.Dispose();
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m_vncClient = null;
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}
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// Reset
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this.AutoScroll = false;
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this.AutoScrollMinSize = new Size(0, 0);
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m_vncClient = new VNCGraphicsClient(this);
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m_vncClient.Size = newSize;
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this.Size = newSize;
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m_vncClient.UseSource = true;
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m_vncClient.SendScanCodes = !this.m_sourceIsPV;
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m_vncClient.Dock = DockStyle.Fill;
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this.m_vncClient.Scaling = scaling; // SCVMM requires a scaled image
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m_vncClient.DisplayBorder = show_border;
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m_vncClient.AutoScaleDimensions = newSize;
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m_vncClient.AutoScaleMode = AutoScaleMode.Inherit;
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this.m_vncClient.DesktopResized += ResolutionChangeHandler;
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//this.m_vncClient.Resize += ResizeHandler;
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//this.m_vncClient.ErrorOccurred += ErrorHandler;
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//this.m_vncClient.ConnectionSuccess += ConnectionSuccess;
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//this.m_vncClient.ErrorOccurred
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//this.m_vncClient.MouseDown += new MouseEventHandler(vncClient_MouseDown);
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//this.m_vncClient.KeyDown += new KeyEventHandler(vncClient_KeyDown);
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m_vncClient.KeyHandler = new ConsoleKeyHandler();
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this.m_vncClient.Unpause();
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foreach (Set<Keys> keys in extraCodes.Keys)
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{
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m_vncClient.KeyHandler.AddKeyHandler(keys, extraCodes[keys]);
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}
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foreach (Set<int> keys in extraScans.Keys)
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{
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m_vncClient.KeyHandler.AddKeyHandler(keys, extraScans[keys]);
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}
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}
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#endregion
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#region Active-X interface implementation
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// externally subscribed events
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public delegate void OnDisconnectedCallbackHandler(int EventID, string DisconnectReason);
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public event OnDisconnectedCallbackHandler OnDisconnectedCallbackEvent;
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public delegate void OnResolutionChangeCallbackHandler(string NewResolution);
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public event OnResolutionChangeCallbackHandler OnResolutionChangeCallbackEvent;
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/// <summary>
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/// Connect to a VM's console
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/// </summary>
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/// <param name="server">XenServer to connect to</param>
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/// <param name="port">Port that XenAPI is availabl on</param>
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/// <param name="vm_uuid">The UUID of the VM whose console to connect to</param>
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/// <param name="username">username for the xenapi AND the VM's console</param>
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/// <param name="password">password for the xenapi AND the VM's console</param>
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/// <param name="width">Width to initialize the VNC control to</param>
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/// <param name="height">Height to initialize the VNC control to</param>
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/// <param name="show_border">Bool to show border around the control when in focus</param>
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/// <returns>true, if it succeeds and false if it doesnt</returns>
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[ComVisible(true)]
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public bool Connect(string server, int port, string vm_uuid, string username, string password, int width, int height, bool show_border)
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{
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// reinitiailize the VNC Control
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initSubControl(width, height, true, show_border);
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m_vncClient.ErrorOccurred += ConnectionErrorHandler;
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try {
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// Create a new XenAPI session
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m_session = new Session(Session.STANDARD_TIMEOUT, server, port);
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// Authenticate with username and password passed in.
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// The third parameter tells the server which API version we support.
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m_session.login_with_password(username, password, API_Version.LATEST);
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m_vncPassword = password.ToCharArray();
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// Find the VM in question
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XenRef<VM> vmRef = VM.get_by_uuid(m_session, vm_uuid);
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m_sourceVM = VM.get_record(m_session, vmRef);
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// Check if this VM is PV or HVM
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m_sourceIsPV = (m_sourceVM.PV_bootloader.Length != 0); /* No PV bootloader specified implies HVM */
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// Get the console that uses the RFB (VNC) protocol
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List<XenRef<XenAPI.Console>> consoleRefs = VM.get_consoles(m_session, vmRef);
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XenAPI.Console console = null;
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foreach (XenRef<XenAPI.Console> consoleRef in consoleRefs)
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{
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console = XenAPI.Console.get_record(m_session, consoleRef);
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if (console.protocol == console_protocol.rfb)
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break;
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console = null;
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}
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if (console != null)
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//ThreadPool.QueueUserWorkItem(new WaitCallback(ConnectToConsole), new KeyValuePair<VNCGraphicsClient, XenAPI.Console>(m_vncClient, console));
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ConnectHostedConsole(m_vncClient, console, m_session.uuid);
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// done with this session, log it out
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m_session.logout();
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}
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catch (Exception exn)
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{
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// call the expcetion handler directly
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this.ConnectionErrorHandler(this, exn);
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}
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return m_vncClient.Connected;
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}
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/// <summary>
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/// Connect to the VNC control via a URL
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/// </summary>
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/// <returns>true if the connection worked</returns>
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[ComVisible(true)]
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public bool ConnectConsole(string consoleuri, int width, int height, bool show_border)
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{
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//reinitialise the VNC Control
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initSubControl(width, height, true, show_border);
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m_vncClient.ErrorOccurred += ConnectionErrorHandler;
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try {
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XenAPI.Console console = new XenAPI.Console();
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console.protocol = console_protocol.rfb;
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console.location = consoleuri;
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Uri uri = new Uri(consoleuri);
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char[] delims = { '&', '=' , '?' };
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string qargs = uri.Query;
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string session_id = "";
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string vm_Opref = "";
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string console_ref = "";
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string[] args = qargs.Split(delims);
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int x = -1;
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int y = -1;
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int z = -1;
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int count = 0;
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foreach (string s in args)
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{
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if ( String.Equals(s, "session_id", StringComparison.Ordinal) ) {
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//The session_id value must be one greater in array
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x = count + 1;
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} else if ( String.Equals(s, "ref", StringComparison.Ordinal) ) {
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//The OpaqueRef for vnc console must be one greater in array
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y = count + 1;
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} else if (String.Equals(s, "uuid", StringComparison.Ordinal) ) {
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//The uuid was passed for the vnc console - it must be one
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//greater in the array.
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z = count + 1;
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}
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count++;
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}
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//Checks for incorrect parsing of the console URL
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if( x == -1 || x == count)
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this.ConnectionErrorHandler(this, new System.ApplicationException("Error: The session ID has been incorrectly parsed."));
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else
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session_id = args[x];
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if (console != null){
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try {
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m_session = new Session("http://" + uri.Host , session_id);
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}
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catch (XenAPI.Failure f) {
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if (f.ErrorDescription[0] == HOST_IS_SLAVE)
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{
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string m_address = f.ErrorDescription[1];
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m_session = new Session("http://" + m_address, session_id);
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}
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}
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if( (y == -1 && z == -1) || (y == count && z == count)) {
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//Check for the error case where neither uuid or vm_reference have been supplied.
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this.ConnectionErrorHandler(this, new System.ApplicationException("Error: The console reference has been incorrectly parsed."));
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}
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else if( y != -1 && y != count) {
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//The console reference has been provided.
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console_ref = args[y];
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}
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else if( z !=-1 && z != count){
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//The console uuid has been supplied instead, we must get the VM reference.
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console_ref = XenAPI.Console.get_by_uuid(m_session, args[z]);
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}
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vm_Opref = XenAPI.Console.get_VM(m_session, console_ref);
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m_sourceVM = VM.get_record(m_session, vm_Opref);
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// Check if this VM is PV or HVM
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m_sourceIsPV = (m_sourceVM.PV_bootloader.Length != 0);
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ConnectHostedConsole(m_vncClient, console, session_id);
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}
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}
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catch (Exception exn) {
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//call the exception handler directly
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this.ConnectionErrorHandler(this, exn);
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}
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return m_vncClient.Connected;
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}
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/// <summary>
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/// Disconnect the VNC control from the VM's console it is presently connected to
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/// </summary>
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/// <returns>true if the disconnect worked</returns>
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[ComVisible(true)]
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public bool Disconnect()
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{
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m_vncClient.ErrorOccurred -= ConnectionErrorHandler;
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if (m_vncClient != null)
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{
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m_vncClient.Disconnect();
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return !m_vncClient.Connected;
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}
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return true;
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}
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/// <summary>
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/// Check to see if the VNCControl can be connected to ????
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/// </summary>
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/// <returns></returns>
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[ComVisible(true)]
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public bool CanConnect() /* may not be necessary */
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{
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return !m_vncClient.Connected;
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}
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/// <summary>
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/// Return the current resolution of the connected VM
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/// </summary>
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/// <returns>widthxheight in pixels</returns>
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[ComVisible(true)]
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public string GetVMResolution()
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{
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Size DeskSize = m_vncClient.DesktopSize;
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return DeskSize.Width + "x" + DeskSize.Height;
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}
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/// <summary>
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/// Check to see if the VNC Control is presently connected to a VM's console
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/// </summary>
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/// <returns>true or false</returns>
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[ComVisible(true)]
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public bool IsConnected()
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{
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return m_vncClient.Connected;
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}
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/// <summary>
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/// Send the CTRL+ALT+DEL key sequence to the VM's console.
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/// If its a windows VM, it brings up the login dialog.
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/// </summary>
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[ComVisible(true)]
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public void SendCtrlAltDel()
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{
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/* send ctrl alt del into the connection */
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if (m_vncClient != null)
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m_vncClient.SendCAD();
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}
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#endregion // Interface implementation
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#region private helper APIs
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private void ConnectHostedConsole(VNCGraphicsClient v, XenAPI.Console console, string session_uuid)
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{
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//Program.AssertOffEventThread();
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Uri uri = new Uri(console.location);
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Stream stream = HTTP.CONNECT(uri, null, session_uuid, 0);
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InvokeConnection(v, stream, console, m_vncPassword);
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}
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private void InvokeConnection(VNCGraphicsClient v, Stream stream, XenAPI.Console console, char[] vncPassword)
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{
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Program.Invoke(this, delegate()
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{
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// This is the last chance that we have to make sure that we've not already
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// connected this VNCGraphicsClient. Now that we are back on the event thread,
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// we're guaranteed that no-one will beat us to the v.connect() call. We
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// hand over responsibility for closing the stream at that point, so we have to
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// close it ourselves if the client is already connected.
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if (v.Connected || v.Terminated)
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{
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stream.Close();
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}
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else
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{
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v.SendScanCodes = !m_sourceIsPV;
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v.SourceVM = m_sourceVM;
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v.Console = console;
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v.Focus();
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v.connect(stream, vncPassword);
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}
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}
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);
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}
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private Stream connectGuest(string ip_address, int port)
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{
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return HTTP.ConnectStream(new Uri(String.Format("http://{0}:{1}/", ip_address, port)), null, true, 0);
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}
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private void PollVNCPort(Object Sender)
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{
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m_vncIP = null;
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String openIP = PollPort(VNC_PORT, true);
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if (openIP != null)
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{
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if (OnDetectVNC != null)
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{
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Program.Invoke(this, OnDetectVNC);
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}
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m_vncIP = openIP;
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}
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}
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/// <summary>
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/// scan each ip address (from the guest agent) for an open port
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/// </summary>
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/// <param name="port"></param>
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private String PollPort(int port, bool vnc)
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{
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try
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{
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Log.Debug("PollPort called");
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if (m_sourceVM == null)
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return null;
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VM vm = m_sourceVM;
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XenRef<VM_guest_metrics> guestMetricsRef = vm.guest_metrics;
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if (guestMetricsRef == null)
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return null;
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VM_guest_metrics metrics = XenAPI.VM_guest_metrics.get_record(m_session, vm.guest_metrics);
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if (metrics == null)
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return null;
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Dictionary<string, string> networks = metrics.networks;
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if (networks == null)
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return null;
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List<String> ipAddresses = new List<String>();
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foreach (String key in networks.Keys)
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{
|
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if (key.EndsWith("ip"))
|
|
ipAddresses.Add(networks[key]);
|
|
}
|
|
|
|
foreach (String ipAddress in ipAddresses)
|
|
{
|
|
try
|
|
{
|
|
Stream s = connectGuest(ipAddress, port);
|
|
if (vnc)
|
|
{
|
|
//SetPendingVNCConnection(s);
|
|
}
|
|
else
|
|
{
|
|
s.Close();
|
|
}
|
|
return ipAddress;
|
|
}
|
|
catch (Exception exn)
|
|
{
|
|
Log.Debug(exn);
|
|
}
|
|
}
|
|
}
|
|
catch (WebException)
|
|
{
|
|
// xapi has gone away.
|
|
}
|
|
catch (IOException)
|
|
{
|
|
// xapi has gone away.
|
|
}
|
|
catch (XenAPI.Failure exn)
|
|
{
|
|
if (exn.ErrorDescription[0] == HANDLE_INVALID)
|
|
{
|
|
// HANDLE_INVALID is fine -- the guest metrics are not there yet.
|
|
}
|
|
else if (exn.ErrorDescription[0] == SESSION_INVALID)
|
|
{
|
|
// SESSION_INVALID is fine -- these will expire from time to time.
|
|
// We need to invalidate the session though.
|
|
//lock (activeSessionLock)
|
|
//{
|
|
m_session = null;
|
|
//}
|
|
}
|
|
else
|
|
{
|
|
Log.Warn("Exception while polling VM for port " + port + ".", exn);
|
|
}
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
Log.Warn("Exception while polling VM for port " + port + ".", e);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
#if DEBUG
|
|
// Test API for the harness
|
|
public Dictionary<String, String> ListConsoles(String server, int port, String username, String password)
|
|
{
|
|
XenAPI.Session session = new Session(Session.STANDARD_TIMEOUT, server, port);
|
|
Dictionary<String, String> dict = new Dictionary<String, String>();
|
|
|
|
// Authenticate with username and password. The third parameter tells the server which API version we support.
|
|
session.login_with_password(username, password, API_Version.LATEST);
|
|
List<XenRef<XenAPI.Console>> consoleRefs = XenAPI.Console.get_all(session);
|
|
foreach (XenRef<XenAPI.Console> consoleRef in consoleRefs)
|
|
{
|
|
XenAPI.Console console = XenAPI.Console.get_record(session, consoleRef);
|
|
XenAPI.VM vm = XenAPI.VM.get_record(session, console.VM);
|
|
dict.Add(vm.uuid, vm.name_label);
|
|
}
|
|
|
|
return dict;
|
|
}
|
|
#endif
|
|
private void ConnectionErrorHandler(object sender, Exception exn)
|
|
{
|
|
Program.Invoke(this, delegate()
|
|
{
|
|
Log.Debug(exn, exn);
|
|
if(this.OnDisconnectedCallbackEvent != null)
|
|
this.OnDisconnectedCallbackEvent(0, exn.Message);
|
|
else
|
|
MessageBox.Show(exn.Message, "VNCControl Error");
|
|
});
|
|
}
|
|
|
|
private void ResolutionChangeHandler(object sender, EventArgs e)
|
|
{
|
|
|
|
Program.Invoke(this, delegate()
|
|
{
|
|
if (this.OnResolutionChangeCallbackEvent != null)
|
|
this.OnResolutionChangeCallbackEvent(GetVMResolution());
|
|
});
|
|
}
|
|
|
|
#endregion // private helpers
|
|
|
|
#region COM registration and unregistration helpers
|
|
[ComRegisterFunction()]
|
|
public static void RegisterClass ( string key )
|
|
{
|
|
// Strip off HKEY_CLASSES_ROOT\ from the passed key as I don't need it
|
|
StringBuilder sb = new StringBuilder ( key ) ;
|
|
sb.Replace(@"HKEY_CLASSES_ROOT\","") ;
|
|
|
|
// Open the CLSID\{guid} key for write access
|
|
RegistryKey k = Registry.ClassesRoot.OpenSubKey(sb.ToString(),true);
|
|
// And create the 'Control' key - this allows it to show up in
|
|
|
|
// the ActiveX control container
|
|
RegistryKey ctrl = k.CreateSubKey ( "Control" ) ;
|
|
ctrl.Close ( ) ;
|
|
// Next create the CodeBase entry - needed if not string named and GACced.
|
|
|
|
RegistryKey inprocServer32 = k.OpenSubKey ( "InprocServer32" , true ) ;
|
|
inprocServer32.SetValue ( "CodeBase" , Assembly.GetExecutingAssembly().CodeBase ) ;
|
|
inprocServer32.Close ( ) ;
|
|
// Finally close the main key
|
|
k.Close ( ) ;
|
|
}
|
|
|
|
[ComUnregisterFunction()]
|
|
public static void UnregisterClass ( string key )
|
|
{
|
|
StringBuilder sb = new StringBuilder ( key ) ;
|
|
sb.Replace(@"HKEY_CLASSES_ROOT\","") ;
|
|
|
|
// Open HKCR\CLSID\{guid} for write access
|
|
RegistryKey k = Registry.ClassesRoot.OpenSubKey(sb.ToString(),true);
|
|
|
|
// Delete the 'Control' key, but don't throw an exception if it does not exist
|
|
k.DeleteSubKey ( "Control" , false ) ;
|
|
|
|
// Next open up InprocServer32
|
|
RegistryKey inprocServer32 = k.OpenSubKey ( "InprocServer32" , true ) ;
|
|
|
|
// And delete the CodeBase key, again not throwing if missing
|
|
k.DeleteSubKey ( "CodeBase" , false ) ;
|
|
|
|
// Finally close the main key
|
|
k.Close ( ) ;
|
|
}
|
|
#endregion
|
|
}
|
|
}
|