Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 1684 insertions, 0 deletions

diff --git a/src/VBox/ExtPacks/VNC/ExtPack.xml b/src/VBox/ExtPacks/VNC/ExtPack.xml
new file mode 100644
index 00000000..7fa6df13
--- /dev/null
+++ b/src/VBox/ExtPacks/VNC/ExtPack.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<VirtualBoxExtensionPack xmlns="http://www.virtualbox.org/VirtualBoxExtensionPack" version="1.0">
+    <Name>VNC</Name>
+    <Description>VNC plugin module</Description>
+    <Version revision="@VBOX_SVN_REV@">@VBOX_VERSION_STRING@</Version>
+    <MainModule>VBoxVNCMain</MainModule>
+    <VRDEModule>VBoxVNC</VRDEModule>
+    <ShowLicense/>
+</VirtualBoxExtensionPack>
+
diff --git a/src/VBox/ExtPacks/VNC/Makefile.kmk b/src/VBox/ExtPacks/VNC/Makefile.kmk
new file mode 100644
index 00000000..5cc20829
--- /dev/null
+++ b/src/VBox/ExtPacks/VNC/Makefile.kmk
@@ -0,0 +1,174 @@
+# $Id: Makefile.kmk $
+## @file
+# Sub-Makefile for the VNC Extension Pack.
+#
+
+#
+# Copyright (C) 2010-2023 Oracle and/or its affiliates.
+#
+# This file is part of VirtualBox base platform packages, as
+# available from https://www.virtualbox.org.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation, in version 3 of the
+# License.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <https://www.gnu.org/licenses>.
+#
+# SPDX-License-Identifier: GPL-3.0-only
+#
+
+SUB_DEPTH = ../../../..
+include $(KBUILD_PATH)/subheader.kmk
+
+#
+# Extend the extension pack templates.
+#
+TEMPLATE_VBoxR3ExtPackVNC          = For the ring-3 context modules in the VNC extension pack.
+TEMPLATE_VBoxR3ExtPackVNC_EXTENDS  = VBoxR3ExtPack
+TEMPLATE_VBoxR3ExtPackVNC_INST     = $(INST_EXTPACK)VNC/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/
+
+TEMPLATE_VBoxR0ExtPackVNC          = For the ring-0 context modules in the VNC extension pack.
+TEMPLATE_VBoxR0ExtPackVNC_EXTENDS  = VBoxR0ExtPack
+TEMPLATE_VBoxR0ExtPackVNC_INST     = $(INST_EXTPACK)VNC/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/
+
+TEMPLATE_VBoxRcExtPackVNC          = For the raw-mode context modules in the VNC extension pack.
+TEMPLATE_VBoxRcExtPackVNC_EXTENDS  = VBoxRcExtPack
+TEMPLATE_VBoxRcExtPackVNC_INST     = $(INST_EXTPACK)VNC/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/
+
+TEMPLATE_VBoxInsExtPackVNC         = For the install targets of an extension pack.
+TEMPLATE_VBoxInsExtPackVNC_EXTENDS = VBoxR0ExtPack
+TEMPLATE_VBoxInsExtPackVNC_INST    = $(INST_EXTPACK)VNC/
+
+#
+# Globals.
+#
+VBOX_VNC_NAME         = VNC
+VBOX_VNC_MANGLED_NAME = VNC
+VBOX_PATH_EXTPACK_VNC = $(PATH_STAGE)/$(INST_EXTPACK)VNC
+
+#
+# VBoxVNCMain - The module which the VirtualBox Main API talks to.
+#
+DLLS += VBoxVNCMain
+VBoxVNCMain_TEMPLATE = VBoxR3ExtPackVNC
+VBoxVNCMain_SOURCES = VBoxVNCMain.cpp
+VBoxVNCMain_DEFS =
+
+#
+# VBoxVNC - The VNC VRDE module.
+#
+DLLS += VBoxVNC
+VBoxVNC_TEMPLATE = VBoxR3ExtPackVNC
+VBoxVNC_SOURCES = VBoxVNC.cpp
+# NOTE: vncserver is covered by GPL, so the extpack must be GPL, too.
+VBoxVNC_LIBS = vncserver
+VBoxVNC_DEFS =
+
+#
+# Install the description.
+#
+INSTALLS += VBoxVNCIns
+VBoxVNCIns_TEMPLATE = VBoxInsExtPackVNC
+VBoxVNCIns_SOURCES = \
+	$(VBoxVNCIns_0_OUTDIR)/ExtPack.xml \
+	$(PATH_ROOT)/doc/License-gpl-2.html=>ExtPack-license.html \
+	$(PATH_ROOT)/doc/License-gpl-2.txt=>ExtPack-license.txt \
+	$(PATH_ROOT)/doc/License-gpl-2.rtf=>ExtPack-license.rtf
+$(call VBOX_EDIT_VERSION_RULE_FN,VBoxVNCIns,ExtPack.xml)
+
+
+#
+# Packing.
+#
+ifndef VBOX_WITHOUT_EXTPACK_VNC_PACKING
+ PACKING += $(VBOX_PATH_PACKAGES)/$(VBOX_VNC_MANGLED_NAME)-$(VBOX_VERSION_STRING)r$(VBOX_SVN_REV).vbox-extpack
+endif
+
+ifndef VBOX_WITH_EXTPACK_OS_ARCHS
+ VBOX_WITH_EXTPACK_OS_ARCHS = $(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)
+endif
+
+# Build the file list.  The macro takes 1=darwin.x86, 2=dist/VirtualBox.app/Contents/MacOS, 3=dylib
+VBOX_VNC_FILES_MACRO = \
+	$(PATH_OUT_BASE)/$(1)/$(KBUILD_TYPE)/$(2)/ExtensionPacks/$(VBOX_VNC_MANGLED_NAME)/$(1)/VBoxVNCMain.$(3)=>$(1)/VBoxVNCMain.$(3) \
+	$(PATH_OUT_BASE)/$(1)/$(KBUILD_TYPE)/$(2)/ExtensionPacks/$(VBOX_VNC_MANGLED_NAME)/$(1)/VBoxVNC.$(3)=>$(1)/VBoxVNC.$(3)
+
+VBOX_VNC_FILES := \
+	$(VBOX_PATH_EXTPACK_VNC)/ExtPack.xml=>ExtPack.xml \
+	$(VBOX_PATH_EXTPACK_VNC)/ExtPack-license.html=>ExtPack-license.html \
+	$(VBOX_PATH_EXTPACK_VNC)/ExtPack-license.rtf=>ExtPack-license.rtf \
+	$(VBOX_PATH_EXTPACK_VNC)/ExtPack-license.txt=>ExtPack-license.txt
+
+
+if1of (darwin.amd64, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,darwin.amd64,dist/VirtualBox.app/Contents/MacOS,dylib)
+endif
+if1of (darwin.x86, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,darwin.x86,dist/VirtualBox.app/Contents/MacOS,dylib)
+endif
+if1of (freebsd.amd64, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,freebsd.amd64,bin,so)
+endif
+if1of (freebsd.x86, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,freebsd.x86,bin,so)
+endif
+if1of (linux.amd64, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,linux.amd64,bin,so)
+endif
+if1of (linux.x86, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,linux.x86,bin,so)
+endif
+if1of (os2.x86, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,os2.x86,bin,so)
+endif
+if1of (solaris.amd64, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,solaris.amd64,bin,so)
+endif
+if1of (solaris.x86, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,solaris.x86,bin,so)
+endif
+if1of (win.amd64, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,win.amd64,bin,dll)
+endif
+if1of (win.x86, $(VBOX_WITH_EXTPACK_OS_ARCHS))
+ VBOX_VNC_FILES += $(call VBOX_VNC_FILES_MACRO,win.x86,bin,dll)
+endif
+
+# Pack it all up using a temporary staging directory.
+$(VBOX_PATH_PACKAGES)/$(VBOX_VNC_MANGLED_NAME)-$(VBOX_VERSION_STRING)r$(VBOX_SVN_REV).vbox-extpack: \
+		$$(foreach file, $$(VBOX_VNC_FILES), $$(firstword $$(subst =>,$$(SP),$$(file)))) \
+		| $(VBOX_PATH_PACKAGES)/
+	$(RM) -f $(wildcard $(VBOX_PATH_PACKAGES)/$(VBOX_VNC_MANGLED_NAME)-*.vbox-extpack) \
+		$(VBoxVNCIns_0_OUTDIR)/ExtPack.manifest \
+		$(VBoxVNCIns_0_OUTDIR)/ExtPack.signature
+# Stage all the files
+	$(RM) -Rf $(VBoxVNCIns_0_OUTDIR)/Stage/
+	$(foreach file, $(VBOX_VNC_FILES),\
+		$(NLTAB)$(MKDIR) -p $(dir $(lastword $(subst =>,$(SP)$(VBoxVNCIns_0_OUTDIR)/Stage/,$(file)))) \
+		$(NLTAB)$(CP) $(subst =>,$(SP)$(VBoxVNCIns_0_OUTDIR)/Stage/,$(file)) )
+# Create the manifest
+	$(VBOX_RTMANIFEST) \
+		--manifest $(VBoxVNCIns_0_OUTDIR)/Stage/ExtPack.manifest \
+		--chdir $(VBoxVNCIns_0_OUTDIR)/Stage/ \
+		$(foreach file, $(VBOX_VNC_FILES), $(lastword $(subst =>,$(SP),$(file))))
+	$(APPEND) $(VBoxVNCIns_0_OUTDIR)/Stage/ExtPack.signature "todo"
+	$(CHMOD) a+r \
+		$(VBoxVNCIns_0_OUTDIR)/Stage/ExtPack.manifest \
+		$(VBoxVNCIns_0_OUTDIR)/Stage/ExtPack.signature
+# Tar it up.
+	tar -cvf - -C $(VBoxVNCIns_0_OUTDIR)/Stage/ . | gzip -9c > $@
+# Clean up
+	$(RM) -Rf $(VBoxVNCIns_0_OUTDIR)/Stage/
+
+BLDDIRS += $(VBOX_PATH_PACKAGES)/
+
+include $(FILE_KBUILD_SUB_FOOTER)
+
diff --git a/src/VBox/ExtPacks/VNC/VBoxVNC.cpp b/src/VBox/ExtPacks/VNC/VBoxVNC.cpp
new file mode 100644
index 00000000..be487cf7
--- /dev/null
+++ b/src/VBox/ExtPacks/VNC/VBoxVNC.cpp
@@ -0,0 +1,1373 @@
+/* $Id: VBoxVNC.cpp $ */
+/** @file
+ * VBoxVNC - VNC VRDE module.
+ */
+
+/*
+ * Contributed by Ivo Smits <Ivo@UFO-Net.nl>, Howard Su and
+ * Christophe Devriese <christophe.devriese@gmail.com>.
+ *
+ * Copyright (C) 2011-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP LOG_GROUP_VRDE
+#include <VBox/log.h>
+
+#include <iprt/asm.h>
+#include <iprt/alloca.h>
+#include <iprt/ldr.h>
+#include <iprt/param.h>
+#include <iprt/path.h>
+#include <iprt/mem.h>
+#include <iprt/socket.h>
+#include <iprt/stream.h>
+#include <iprt/string.h>
+#include <iprt/thread.h>
+#include <iprt/cpp/utils.h>
+
+#include <iprt/errcore.h>
+#include <VBox/RemoteDesktop/VRDEOrders.h>
+#include <VBox/RemoteDesktop/VRDE.h>
+
+#include <rfb/rfb.h>
+
+#ifdef LIBVNCSERVER_IPv6
+// enable manually!
+// #define VBOX_USE_IPV6
+#endif
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+#define VNC_SIZEOFRGBA          4
+#define VNC_PASSWORDSIZE        20
+#define VNC_ADDRESSSIZE         60
+#define VNC_PORTSSIZE           20
+#define VNC_ADDRESS_OPTION_MAX  500
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+class VNCServerImpl
+{
+public:
+    VNCServerImpl()
+    {
+        mVNCServer = NULL;
+        mFrameBuffer = NULL;
+        mScreenBuffer = NULL;
+        mCursor = NULL;
+        uClients = 0;
+    }
+
+    ~VNCServerImpl()
+    {
+        if (mFrameBuffer)
+            RTMemFree(mFrameBuffer);
+        if (mCursor)
+            rfbFreeCursor(mCursor);
+        RT_ZERO(szVNCPassword);
+        if (mVNCServer)
+            rfbScreenCleanup(mVNCServer);
+    }
+
+    int Init(const VRDEINTERFACEHDR *pCallbacks, void *pvCallback);
+
+    VRDEINTERFACEHDR *GetInterface() { return &Entries.header; }
+
+private:
+    // VNC password
+    char szVNCPassword[VNC_PASSWORDSIZE + 1];
+    // the structure we pass to libvncserver
+    char *apszVNCPasswordStruct[2];
+
+    // VNC related variables
+    rfbScreenInfoPtr mVNCServer;
+    void *mCallback;
+    rfbCursorPtr mCursor;
+    VRDEFRAMEBUFFERINFO FrameInfo;
+    unsigned char *mScreenBuffer;
+    unsigned char *mFrameBuffer;
+    uint32_t uClients;
+    static enum rfbNewClientAction rfbNewClientEvent(rfbClientPtr cl);
+    static void vncMouseEvent(int buttonMask, int x, int y, rfbClientPtr cl);
+    static void vncKeyboardEvent(rfbBool down, rfbKeySym keySym, rfbClientPtr cl);
+    static void clientGoneHook(rfbClientPtr cl);
+
+    static uint32_t RGB2BGR(uint32_t c)
+    {
+        c = ((c >> 0) & 0xff) << 16 |
+            ((c >> 8) & 0xff) << 8 |
+            ((c >> 16) & 0xff) << 0;
+
+        return c;
+    }
+
+    int     queryVrdeFeature(const char *pszName, char *pszValue, size_t cbValue);
+
+    static VRDEENTRYPOINTS_4 Entries;
+    VRDECALLBACKS_4 *mCallbacks;
+
+    static DECLCALLBACK(void) VRDEDestroy(HVRDESERVER hServer);
+    static DECLCALLBACK(int)  VRDEEnableConnections(HVRDESERVER hServer, bool fEnable);
+    static DECLCALLBACK(void) VRDEDisconnect(HVRDESERVER hServer, uint32_t u32ClientId, bool fReconnect);
+    static DECLCALLBACK(void) VRDEResize(HVRDESERVER hServer);
+    static DECLCALLBACK(void) VRDEUpdate(HVRDESERVER hServer, unsigned uScreenId, void *pvUpdate,uint32_t cbUpdate);
+    static DECLCALLBACK(void) VRDEColorPointer(HVRDESERVER hServer, const VRDECOLORPOINTER *pPointer);
+    static DECLCALLBACK(void) VRDEHidePointer(HVRDESERVER hServer);
+    static DECLCALLBACK(void) VRDEAudioSamples(HVRDESERVER hServer, const void *pvSamples, uint32_t cSamples, VRDEAUDIOFORMAT format);
+    static DECLCALLBACK(void) VRDEAudioVolume(HVRDESERVER hServer, uint16_t u16Left, uint16_t u16Right);
+    static DECLCALLBACK(void) VRDEUSBRequest(HVRDESERVER hServer,
+        uint32_t u32ClientId,
+        void *pvParm,
+        uint32_t cbParm);
+    static DECLCALLBACK(void) VRDEClipboard(HVRDESERVER hServer,
+        uint32_t u32Function,
+        uint32_t u32Format,
+        void *pvData,
+        uint32_t cbData,
+        uint32_t *pcbActualRead);
+    static DECLCALLBACK(void) VRDEQueryInfo(HVRDESERVER hServer,
+        uint32_t index,
+        void *pvBuffer,
+        uint32_t cbBuffer,
+        uint32_t *pcbOut);
+    static DECLCALLBACK(void) VRDERedirect(HVRDESERVER hServer,
+        uint32_t u32ClientId,
+        const char *pszServer,
+        const char *pszUser,
+        const char *pszDomain,
+        const char *pszPassword,
+        uint32_t u32SessionId,
+        const char *pszCookie);
+    static DECLCALLBACK(void) VRDEAudioInOpen(HVRDESERVER hServer,
+        void *pvCtx,
+        uint32_t u32ClientId,
+        VRDEAUDIOFORMAT audioFormat,
+        uint32_t u32SamplesPerBlock);
+    static DECLCALLBACK(void) VRDEAudioInClose(HVRDESERVER hServer,
+        uint32_t u32ClientId);
+};
+
+VRDEENTRYPOINTS_4 VNCServerImpl::Entries = {
+    { VRDE_INTERFACE_VERSION_3, sizeof(VRDEENTRYPOINTS_3) },
+    VNCServerImpl::VRDEDestroy,
+    VNCServerImpl::VRDEEnableConnections,
+    VNCServerImpl::VRDEDisconnect,
+    VNCServerImpl::VRDEResize,
+    VNCServerImpl::VRDEUpdate,
+    VNCServerImpl::VRDEColorPointer,
+    VNCServerImpl::VRDEHidePointer,
+    VNCServerImpl::VRDEAudioSamples,
+    VNCServerImpl::VRDEAudioVolume,
+    VNCServerImpl::VRDEUSBRequest,
+    VNCServerImpl::VRDEClipboard,
+    VNCServerImpl::VRDEQueryInfo,
+    VNCServerImpl::VRDERedirect,
+    VNCServerImpl::VRDEAudioInOpen,
+    VNCServerImpl::VRDEAudioInClose
+};
+
+
+/** Destroy the server instance.
+ *
+ * @param hServer The server instance handle.
+ *
+ * @return IPRT status code.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEDestroy(HVRDESERVER hServer)
+{
+    VNCServerImpl *instance = (VNCServerImpl *)hServer;
+    rfbShutdownServer(instance->mVNCServer, TRUE);
+
+    uint32_t port = UINT32_MAX;
+    instance->mCallbacks->VRDECallbackProperty(instance->mCallback,
+                                               VRDE_SP_NETWORK_BIND_PORT,
+                                               &port, sizeof(port), NULL);
+    return;
+}
+
+
+/**
+ * Query a feature and store it's value in a user supplied buffer.
+ *
+ * @returns VBox status code.
+ * @param   pszName             The feature name.
+ * @param   pszValue            The value buffer.  The buffer is not touched at
+ *                              all on failure.
+ * @param   cbValue             The size of the output buffer.
+ */
+int VNCServerImpl::queryVrdeFeature(const char *pszName, char *pszValue, size_t cbValue)
+{
+    union
+    {
+        VRDEFEATURE Feat;
+        uint8_t     abBuf[VNC_ADDRESS_OPTION_MAX + sizeof(VRDEFEATURE)];
+    } u;
+
+    u.Feat.u32ClientId = 0;
+    int rc = RTStrCopy(u.Feat.achInfo, VNC_ADDRESS_OPTION_MAX, pszName); AssertRC(rc);
+    if (RT_SUCCESS(rc))
+    {
+        uint32_t cbOut = 0;
+        rc = mCallbacks->VRDECallbackProperty(mCallback,
+                                              VRDE_QP_FEATURE,
+                                              &u.Feat,
+                                              VNC_ADDRESS_OPTION_MAX,
+                                              &cbOut);
+        if (RT_SUCCESS(rc))
+        {
+            size_t cbRet = strlen(u.Feat.achInfo) + 1;
+            if (cbRet <= cbValue)
+                memcpy(pszValue, u.Feat.achInfo, cbRet);
+            else
+                rc = VERR_BUFFER_OVERFLOW;
+        }
+    }
+
+    return rc;
+}
+
+
+/** The server should start to accept clients connections.
+ *
+ * @param hServer The server instance handle.
+ * @param fEnable Whether to enable or disable client connections.
+ *                When is false, all existing clients are disconnected.
+ *
+ * @return IPRT status code.
+ */
+DECLCALLBACK(int) VNCServerImpl::VRDEEnableConnections(HVRDESERVER hServer, bool fEnable)
+{
+    RT_NOREF(fEnable);
+    VNCServerImpl *instance = (VNCServerImpl *)hServer;
+
+#ifdef LOG_ENABLED
+    // enable logging
+    rfbLogEnable(true);
+#endif
+    LogFlowFunc(("enter\n"));
+
+    // At this point, VRDECallbackFramebufferQuery will not succeed.
+    // Initialize VNC with 640x480 and wait for VRDEResize to get actual size.
+    int dummyWidth = 640, dummyHeight = 480;
+
+    rfbScreenInfoPtr vncServer = rfbGetScreen(0, NULL, dummyWidth, dummyHeight, 8, 3, VNC_SIZEOFRGBA);
+    instance->mVNCServer = vncServer;
+
+    VRDEFRAMEBUFFERINFO info;
+    RT_ZERO(info);
+    info.cWidth = dummyWidth, info.cHeight = dummyHeight;
+    info.cBitsPerPixel = 24;
+    info.pu8Bits = NULL;
+    unsigned char *FrameBuffer = (unsigned char *)RTMemAlloc(info.cWidth * info.cHeight * VNC_SIZEOFRGBA); // RGBA
+    rfbNewFramebuffer(instance->mVNCServer, (char *)FrameBuffer, info.cWidth, info.cHeight, 8, 3, VNC_SIZEOFRGBA);
+    instance->mFrameBuffer = FrameBuffer;
+    instance->mScreenBuffer = (unsigned char *)info.pu8Bits;
+    instance->FrameInfo = info;
+
+    vncServer->serverFormat.redShift = 16;
+    vncServer->serverFormat.greenShift = 8;
+    vncServer->serverFormat.blueShift = 0;
+    vncServer->screenData = (void *)instance;
+    vncServer->desktopName = "VBoxVNC";
+
+#ifndef VBOX_USE_IPV6
+
+    // get listen address
+    char szAddress[VNC_ADDRESSSIZE + 1] = {0};
+    uint32_t cbOut = 0;
+    int rc = instance->mCallbacks->VRDECallbackProperty(instance->mCallback,
+                                                    VRDE_QP_NETWORK_ADDRESS,
+                                                    &szAddress, sizeof(szAddress), &cbOut);
+    Assert(cbOut <= sizeof(szAddress));
+    if (RT_SUCCESS(rc) && szAddress[0])
+    {
+        if (!rfbStringToAddr(szAddress, &vncServer->listenInterface))
+            LogRel(("VNC: could not parse VNC server listen address '%s'\n", szAddress));
+    }
+
+    // get listen port
+    uint32_t port = 0;
+    rc = instance->mCallbacks->VRDECallbackProperty(instance->mCallback,
+                                                    VRDE_QP_NETWORK_PORT,
+                                                    &port, sizeof(port), &cbOut);
+    Assert(cbOut <= sizeof(port));
+    if (RT_SUCCESS(rc) && port != 0)
+        vncServer->port = port;
+    else
+    {
+        const char szFeatName[] = "Property/TCP/Ports";
+        const uint32_t featLen = sizeof(VRDEFEATURE) + RT_MAX(VNC_PORTSSIZE, sizeof(szFeatName)) - 1;
+        VRDEFEATURE *feature = (VRDEFEATURE *)RTMemTmpAlloc(featLen);
+        feature->u32ClientId = 0;
+        RTStrCopy(feature->achInfo, featLen - sizeof(VRDEFEATURE) + 1, szFeatName);
+
+        cbOut = featLen;
+        rc = instance->mCallbacks->VRDECallbackProperty(instance->mCallback, VRDE_QP_FEATURE, feature, featLen, &cbOut);
+        Assert(cbOut <= featLen);
+
+        if (RT_SUCCESS(rc) && feature->achInfo[0])
+        {
+            rc = RTStrToUInt32Ex(feature->achInfo, NULL, 0, &port);
+            if (RT_FAILURE(rc) || port >= 65535)
+                vncServer->autoPort = 1;
+            else
+                vncServer->port = port;
+        }
+        else
+            vncServer->autoPort = 1;
+
+        RTMemTmpFree(feature);
+    }
+
+    rfbInitServer(vncServer);
+
+    vncServer->newClientHook = rfbNewClientEvent;
+    vncServer->kbdAddEvent = vncKeyboardEvent;
+    vncServer->ptrAddEvent = vncMouseEvent;
+
+    // notify about the actually used port
+    port = vncServer->port;
+    instance->mCallbacks->VRDECallbackProperty(instance->mCallback,
+                                               VRDE_SP_NETWORK_BIND_PORT,
+                                               &port, sizeof(port), NULL);
+    LogRel(("VNC: port = %u\n", port));
+#else
+    // with IPv6 from here
+    /*
+
+       This is the deal:
+
+       Four new options are available:
+       - VNCAddress4 -> IPv4 address to use
+       - VNCPort4 -> IPv4 Port to use
+       - VNCAddress6 -> IPv6 address to use
+       - VNCPort6 -> IPv6 port to use
+
+       By default we prefer IPv6 over IPv4.
+
+       The address length can be unlimited as the interface identifier is not
+       limited by any specs - if this is wrong, and someone knows the line
+       and the RFC number, i'd appreciate a message :)
+
+       THE MAXIMUM LENGTH OF THE RETURNED VALUES MUST NOT BE GREATER THAN:
+
+                        --> VBOX_ADDRESS_OPTION_MAX <--
+
+       which is defined at the top of this file.
+
+       The way to determine which address to use is as follows:
+
+        1st - get address information from VRDEProperties
+            "TCP/Address"
+            "TCP/Ports"
+
+        2nd - if the address information is IPv4 get VNCAddress6 and VNCPort6
+        2nd - if the address information is IPv6 get VNCAddress4 and VNCPort4
+        2nd - if the address information is EMPTY and TCP/Ports returns 3389,
+                check both, VNCAddress4 and VNCAddress6 as well as the ports.
+                3389 is not a valid VNC port, therefore we assume it's not
+                been set
+
+                If one of the addresses is empty we assume to listen on any
+                interface/address for that protocol. In other words:
+                IPv4: 0.0.0.0
+                IPv6: ::
+
+        2nd - if everything is empty -> listen on all interfaces
+
+        3rd - check if the addresses are valid hand them to libvncserver
+                to open the initial sockets.
+
+        4th - after the sockets have been opened, the used port of the
+                address/protocol in TCP/Address is returned.
+                if TCP/Address is empty, prefer IPv6
+
+     */
+
+    /* ok, now first get the address from VRDE/TCP/Address.
+
+    */
+    // this should be put somewhere else
+    char szIPv6ListenAll[] = "::";
+    char szIPv4ListenAll[] = "0.0.0.0";
+
+    uint32_t uServerPort4 = 0;
+    uint32_t uServerPort6 = 0;
+    uint32_t cbOut = 0;
+    size_t resSize = 0;
+    RTNETADDRTYPE enmAddrType;
+    char *pszVNCAddress6 = NULL;
+    char *pszVNCPort6 = NULL;
+    char *pszServerAddress4 = NULL;
+    char *pszServerAddress6 = NULL;
+    char *pszGetAddrInfo4 = NULL; // used to store the result of RTSocketQueryAddressStr()
+    char *pszGetAddrInfo6 = NULL; // used to store the result of RTSocketQueryAddressStr()
+
+    // get address
+    char *pszTCPAddress = (char *)RTMemTmpAllocZ(VNC_ADDRESS_OPTION_MAX);
+    rc = instance->mCallbacks->VRDECallbackProperty(instance->mCallback,
+                                                    VRDE_QP_NETWORK_ADDRESS,
+                                                    pszTCPAddress,
+                                                    VNC_ADDRESS_OPTION_MAX,
+                                                    &cbOut);
+
+    // get port (range)
+    char *pszTCPPort = (char *)RTMemTmpAllocZ(VNC_ADDRESS_OPTION_MAX);
+    rc = instance->mCallbacks->VRDECallbackProperty(instance->mCallback,
+                                                    VRDE_QP_NETWORK_PORT_RANGE,
+                                                    pszTCPPort,
+                                                    VNC_ADDRESS_OPTION_MAX,
+                                                    &cbOut);
+    Assert(cbOut < VNC_ADDRESS_OPTION_MAX);
+
+    // get tcp ports option from vrde.
+    /** @todo r=bird: Is this intentionally overriding VRDE_QP_NETWORK_PORT_RANGE? */
+    instance->queryVrdeFeature("Property/TCP/Ports", pszTCPPort, VNC_ADDRESS_OPTION_MAX);
+
+    // get VNCAddress4
+    char *pszVNCAddress4 = (char *)RTMemTmpAllocZ(24);
+    instance->queryVrdeFeature("Property/VNCAddress4", pszVNCAddress4, 24);
+
+    // VNCPort4
+    char *pszVNCPort4 = (char *)RTMemTmpAlloc(6);
+    instance->queryVrdeFeature("Property/VNCPort4", pszVNCPort4, 6);
+
+    // VNCAddress6
+    pszVNCAddress6 = (char *) RTMemTmpAllocZ(VNC_ADDRESS_OPTION_MAX);
+    instance->queryVrdeFeature("Property/VNCAddress6", pszVNCAddress6, VNC_ADDRESS_OPTION_MAX);
+
+    // VNCPort6
+    pszVNCPort6 = (char *)RTMemTmpAllocZ(6);
+    instance->queryVrdeFeature("Property/VNCPort6", pszVNCPort6, 6);
+
+
+    if (RTNetIsIPv4AddrStr(pszTCPAddress))
+    {
+        pszServerAddress4 = pszTCPAddress;
+
+        if (strlen(pszTCPPort) > 0)
+        {
+            rc = RTStrToUInt32Ex(pszTCPPort, NULL, 10, &uServerPort4);
+            if (!RT_SUCCESS(rc) || uServerPort4 > 65535)
+                uServerPort4 = 0;
+        }
+
+        if (RTNetIsIPv6AddrStr(pszVNCAddress6))
+            pszServerAddress6 = pszVNCAddress6;
+        else
+            pszServerAddress6 = szIPv6ListenAll;
+
+        if (strlen(pszVNCPort6) > 0)
+        {
+            rc = RTStrToUInt32Ex(pszVNCPort6, NULL, 10, &uServerPort6);
+            if (!RT_SUCCESS(rc) || uServerPort6 > 65535)
+                uServerPort6 = 0;
+
+        }
+
+    }
+
+    if (RTNetIsIPv6AddrStr(pszTCPAddress))
+    {
+        pszServerAddress6 = pszTCPAddress;
+
+        if (strlen(pszTCPPort) > 0)
+        {
+            rc = RTStrToUInt32Ex(pszTCPPort, NULL, 10, &uServerPort6);
+            if (!RT_SUCCESS(rc) || uServerPort6 > 65535)
+                uServerPort6 = 0;
+        }
+
+        if (RTNetIsIPv4AddrStr(pszVNCAddress4))
+            pszServerAddress4 = pszVNCAddress4;
+        else
+            pszServerAddress4 = szIPv4ListenAll;
+
+        if (strlen(pszVNCPort4) > 0)
+        {
+            rc = RTStrToUInt32Ex(pszVNCPort4, NULL, 10, &uServerPort4);
+            if (!RT_SUCCESS(rc) || uServerPort4 > 65535)
+                uServerPort4 = 0;
+
+        }
+    }
+
+    if ((pszServerAddress4 != pszTCPAddress) && (pszServerAddress6 != pszTCPAddress) && (strlen(pszTCPAddress) > 0))
+    {
+        // here we go, we prefer IPv6 over IPv4;
+        resSize = 42;
+        pszGetAddrInfo6 = (char *) RTMemTmpAllocZ(resSize);
+        enmAddrType = RTNETADDRTYPE_IPV6;
+
+        rc = RTSocketQueryAddressStr(pszTCPAddress, pszGetAddrInfo6, &resSize, &enmAddrType);
+        if (RT_SUCCESS(rc))
+            pszServerAddress6 = pszGetAddrInfo6;
+        else
+        {
+            RTMemTmpFree(pszGetAddrInfo6);
+            pszGetAddrInfo6 = NULL;
+        }
+
+        if (!pszServerAddress6)
+        {
+            resSize = 16;
+            pszGetAddrInfo4 = (char *) RTMemTmpAllocZ(resSize);
+            enmAddrType = RTNETADDRTYPE_IPV4;
+
+            rc = RTSocketQueryAddressStr(pszTCPAddress, pszGetAddrInfo4, &resSize, &enmAddrType);
+
+            if (RT_SUCCESS(rc))
+                pszServerAddress4 = pszGetAddrInfo4;
+            else
+            {
+                RTMemTmpFree(pszGetAddrInfo4);
+                pszGetAddrInfo4 = NULL;
+            }
+        }
+    }
+
+    if (!pszServerAddress4 && strlen(pszVNCAddress4) > 0)
+    {
+        resSize = 16;
+        pszGetAddrInfo4 = (char *) RTMemTmpAllocZ(resSize);
+        enmAddrType = RTNETADDRTYPE_IPV4;
+
+        rc = RTSocketQueryAddressStr(pszVNCAddress4, pszGetAddrInfo4, &resSize, &enmAddrType);
+
+        if (RT_SUCCESS(rc))
+            pszServerAddress4 = pszGetAddrInfo4;
+
+    }
+
+    if (!pszServerAddress6 && strlen(pszVNCAddress6) > 0)
+    {
+        resSize = 42;
+        pszGetAddrInfo6 = (char *) RTMemTmpAllocZ(resSize);
+        enmAddrType = RTNETADDRTYPE_IPV6;
+
+        rc = RTSocketQueryAddressStr(pszVNCAddress6, pszGetAddrInfo6, &resSize, &enmAddrType);
+
+        if (RT_SUCCESS(rc))
+            pszServerAddress6 = pszGetAddrInfo6;
+
+    }
+    if (!pszServerAddress4)
+    {
+        if (RTNetIsIPv4AddrStr(pszVNCAddress4))
+            pszServerAddress4 = pszVNCAddress4;
+        else
+            pszServerAddress4 = szIPv4ListenAll;
+    }
+    if (!pszServerAddress6)
+    {
+        if (RTNetIsIPv6AddrStr(pszVNCAddress6))
+            pszServerAddress6 = pszVNCAddress6;
+        else
+            pszServerAddress6 = szIPv6ListenAll;
+    }
+
+    if (pszVNCPort4 && uServerPort4 == 0)
+    {
+        rc = RTStrToUInt32Ex(pszVNCPort4, NULL, 10, &uServerPort4);
+        if (!RT_SUCCESS(rc) || uServerPort4 > 65535)
+            uServerPort4 = 0;
+    }
+
+    if (pszVNCPort6 && uServerPort6 == 0)
+    {
+        rc = RTStrToUInt32Ex(pszVNCPort6, NULL, 10, &uServerPort6);
+        if (!RT_SUCCESS(rc) || uServerPort6 > 65535)
+            uServerPort6 = 0;
+    }
+
+    if (uServerPort4 == 0 || uServerPort6 == 0)
+        vncServer->autoPort = 1;
+    else
+    {
+        vncServer->port = uServerPort4;
+        vncServer->ipv6port = uServerPort6;
+    }
+
+    if (!rfbStringToAddr(pszServerAddress4,&vncServer->listenInterface))
+        LogRel(("VNC: could not parse VNC server listen address IPv4 '%s'\n", pszServerAddress4));
+
+    vncServer->listen6Interface = pszServerAddress6;
+
+    rfbInitServer(vncServer);
+
+    vncServer->newClientHook = rfbNewClientEvent;
+    vncServer->kbdAddEvent = vncKeyboardEvent;
+    vncServer->ptrAddEvent = vncMouseEvent;
+
+    // notify about the actually used port
+    int port = 0;
+    port = vncServer->ipv6port;
+
+    if (vncServer->listen6Sock < 0)
+    {
+        LogRel(("VNC: not able to bind to IPv6 socket with address '%s'\n",pszServerAddress6));
+        port = 0;
+
+    }
+
+    instance->mCallbacks->VRDECallbackProperty(instance->mCallback,
+                                               VRDE_SP_NETWORK_BIND_PORT,
+                                               &port, sizeof(port), NULL);
+    LogRel(("VNC: port6 = %u\n", port));
+
+
+    if (pszTCPAddress)
+    {
+        if (pszTCPAddress == pszServerAddress4)
+            pszServerAddress4 = NULL;
+
+        if (pszTCPAddress == pszServerAddress6)
+            pszServerAddress6 = NULL;
+
+        RTMemTmpFree(pszTCPAddress);
+    }
+
+    RTMemTmpFree(pszTCPPort);
+    RTMemTmpFree(pszVNCAddress4);
+    RTMemTmpFree(pszVNCPort4);
+    RTMemTmpFree(pszGetAddrInfo4);
+    RTMemTmpFree(pszVNCAddress6);
+    RTMemTmpFree(pszGetAddrInfo6);
+
+    // with ipv6 to here
+#endif
+    // let's get the password
+    instance->szVNCPassword[0] = '\0';
+    const char szFeatName[] = "Property/VNCPassword";
+    const uint32_t featLen = sizeof(VRDEFEATURE) + RT_MAX(sizeof(instance->szVNCPassword), sizeof(szFeatName)) - 1;
+    VRDEFEATURE *feature = (VRDEFEATURE *)RTMemTmpAlloc(featLen);
+    feature->u32ClientId = 0;
+    RTStrCopy(feature->achInfo, featLen - sizeof(VRDEFEATURE) + 1, szFeatName);
+
+    cbOut = featLen;
+    rc = instance->mCallbacks->VRDECallbackProperty(instance->mCallback, VRDE_QP_FEATURE, feature, featLen, &cbOut);
+    Assert(cbOut <= featLen);
+
+    if (RT_SUCCESS(rc))
+    {
+        RTStrCopy(instance->szVNCPassword, sizeof(instance->szVNCPassword), feature->achInfo);
+        memset(feature->achInfo, '\0', featLen - sizeof(VRDEFEATURE) + 1);
+        LogRel(("VNC: Configuring password\n"));
+
+        instance->apszVNCPasswordStruct[0] = instance->szVNCPassword;
+        instance->apszVNCPasswordStruct[1] = NULL;
+
+        vncServer->authPasswdData = (void *)instance->apszVNCPasswordStruct;
+        vncServer->passwordCheck = rfbCheckPasswordByList;
+    }
+    else
+        LogRel(("VNC: No password result = %Rrc\n", rc));
+
+    RTMemTmpFree(feature);
+
+    rfbRunEventLoop(vncServer, -1, TRUE);
+
+    return VINF_SUCCESS;
+}
+
+/** The server should disconnect the client.
+ *
+ * @param hServer     The server instance handle.
+ * @param u32ClientId The client identifier.
+ * @param fReconnect  Whether to send a "REDIRECT to the same server" packet to the
+ *                    client before disconnecting.
+ *
+ * @return IPRT status code.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEDisconnect(HVRDESERVER hServer, uint32_t u32ClientId, bool fReconnect)
+{
+    RT_NOREF(hServer, u32ClientId, fReconnect);
+}
+
+static inline void convert15To32bpp(uint8_t msb, uint8_t lsb, uint8_t &r, uint8_t &g, uint8_t &b)
+{
+    uint16_t px = lsb << 8 | msb;
+    // RGB 555 (1 bit unused)
+    r = (px >> 7) & 0xf8;
+    g = (px >> 2) & 0xf8;
+    b = (px << 3) & 0xf8;
+}
+
+static inline void convert16To32bpp(uint8_t msb, uint8_t lsb, uint8_t &r, uint8_t &g, uint8_t &b)
+{
+    uint16_t px = lsb << 8 | msb;
+    // RGB 565 (all bits used, 1 extra bit for green)
+    r = (px >> 8) & 0xf8;
+    g = (px >> 3) & 0xfc;
+    b = (px << 3) & 0xf8;
+}
+
+/**
+ * Inform the server that the display was resized.
+ * The server will query information about display
+ * from the application via callbacks.
+ *
+ * @param hServer Handle of VRDE server instance.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEResize(HVRDESERVER hServer)
+{
+    VNCServerImpl *instance = (VNCServerImpl *)hServer;
+    VRDEFRAMEBUFFERINFO info;
+    bool fAvail = instance->mCallbacks->VRDECallbackFramebufferQuery(instance->mCallback, 0, &info);
+    if (!fAvail)
+        return;
+
+    LogRel(("VNCServerImpl::VRDEResize to %dx%dx%dbpp\n", info.cWidth, info.cHeight, info.cBitsPerPixel));
+
+    // we always alloc an RGBA buffer
+    unsigned char *FrameBuffer = (unsigned char *)RTMemAlloc(info.cWidth * info.cHeight * VNC_SIZEOFRGBA); // RGBA
+    if (info.cBitsPerPixel == 32 || info.cBitsPerPixel == 24)
+    {
+        // Convert RGB (windows/vbox) to BGR(vnc)
+        uint32_t i, j;
+        for (i = 0, j = 0; i < info.cWidth * info.cHeight * VNC_SIZEOFRGBA; i += VNC_SIZEOFRGBA, j += info.cBitsPerPixel / 8)
+        {
+            unsigned char r = info.pu8Bits[j];
+            unsigned char g = info.pu8Bits[j + 1];
+            unsigned char b = info.pu8Bits[j + 2];
+            FrameBuffer[i]     = b;
+            FrameBuffer[i + 1] = g;
+            FrameBuffer[i + 2] = r;
+        }
+    }
+    else if (info.cBitsPerPixel == 16)
+    {
+        uint32_t i, j;
+        for (i = 0, j = 0;
+             i < info.cWidth * info.cHeight * VNC_SIZEOFRGBA;
+             i += VNC_SIZEOFRGBA, j += info.cBitsPerPixel / 8)
+        {
+            convert16To32bpp(info.pu8Bits[j],
+                             info.pu8Bits[j + 1],
+                             FrameBuffer[i],
+                             FrameBuffer[i + 1],
+                             FrameBuffer[i + 2]);
+        }
+    }
+    rfbNewFramebuffer(instance->mVNCServer, (char *)FrameBuffer, info.cWidth, info.cHeight, 8, 3, VNC_SIZEOFRGBA);
+
+    void *temp = instance->mFrameBuffer;
+    instance->mFrameBuffer = FrameBuffer;
+    instance->mScreenBuffer = (unsigned char *)info.pu8Bits;
+    instance->FrameInfo = info;
+    if (temp)
+        RTMemFree(temp);
+}
+
+/**
+ * Send a update.
+ *
+ * @param hServer   Handle of VRDE server instance.
+ * @param uScreenId The screen index.
+ * @param pvUpdate  Pointer to VBoxGuest.h::VRDEORDERHDR structure with extra data.
+ * @param cbUpdate  Size of the update data.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEUpdate(HVRDESERVER hServer, unsigned uScreenId, void *pvUpdate,uint32_t cbUpdate)
+{
+    RT_NOREF(uScreenId);
+    char *ptr = (char *)pvUpdate;
+    VNCServerImpl *instance = (VNCServerImpl *)hServer;
+    VRDEORDERHDR *order = (VRDEORDERHDR *)ptr;
+    ptr += sizeof(VRDEORDERHDR);
+    if (order == NULL)
+    {
+        /* Inform the VRDE server that the current display update sequence is
+         * completed. At this moment the framebuffer memory contains a definite
+         * image, that is synchronized with the orders already sent to VRDE client.
+         * The server can now process redraw requests from clients or initial
+         * fullscreen updates for new clients.
+         */
+
+    }
+    else
+    {
+        if (sizeof(VRDEORDERHDR) != cbUpdate)
+        {
+            VRDEORDERCODE *code = (VRDEORDERCODE *)ptr;
+            ptr += sizeof(VRDEORDERCODE);
+
+            switch(code->u32Code)
+            {
+            case VRDE_ORDER_SOLIDRECT:
+                {
+                    VRDEORDERSOLIDRECT *solidrect = (VRDEORDERSOLIDRECT *)ptr;
+                    rfbFillRect(instance->mVNCServer, solidrect->x, solidrect->y,
+                        solidrect->x + solidrect->w, solidrect->y + solidrect->h, RGB2BGR(solidrect->rgb));
+                    return;
+                }
+            /// @todo more orders
+            }
+        }
+
+        if (!instance->mScreenBuffer)
+        {
+            VRDEResize(hServer);
+            if (!instance->mScreenBuffer)
+            {
+                LogRel(("VNCServerImpl::VRDEUpdate: Cannot get frame buffer"));
+                return;
+            }
+        }
+
+        uint32_t width = instance->FrameInfo.cWidth;
+        uint32_t bpp = instance->FrameInfo.cBitsPerPixel / 8;
+        uint32_t joff = order->y * width + order->x;
+        uint32_t srcx, srcy, destx, desty;
+        if (instance->FrameInfo.cBitsPerPixel == 32 || instance->FrameInfo.cBitsPerPixel == 24)
+        {
+            for (srcy = joff * bpp, desty = joff * VNC_SIZEOFRGBA;
+                 desty < (joff + order->h * width) * VNC_SIZEOFRGBA;
+                 srcy += width * bpp, desty += width * VNC_SIZEOFRGBA)
+            {
+                // RGB to BGR
+                for (srcx = srcy, destx = desty;
+                     destx < desty + order->w * VNC_SIZEOFRGBA;
+                     srcx += bpp, destx += VNC_SIZEOFRGBA)
+                {
+                    instance->mFrameBuffer[destx]     = instance->mScreenBuffer[srcx + 2];
+                    instance->mFrameBuffer[destx + 1] = instance->mScreenBuffer[srcx + 1];
+                    instance->mFrameBuffer[destx + 2] = instance->mScreenBuffer[srcx];
+                }
+            }
+        }
+        else if (instance->FrameInfo.cBitsPerPixel == 16)
+        {
+            for (srcy = joff * bpp, desty = joff * VNC_SIZEOFRGBA;
+                 desty < (joff + order->h * width) * VNC_SIZEOFRGBA;
+                 srcy += width * bpp, desty += width * VNC_SIZEOFRGBA)
+            {
+                for (srcx = srcy, destx = desty;
+                     destx < desty + order->w * VNC_SIZEOFRGBA;
+                     srcx += bpp, destx += VNC_SIZEOFRGBA)
+                {
+                    convert16To32bpp(instance->mScreenBuffer[srcx],
+                                     instance->mScreenBuffer[srcx + 1],
+                                     instance->mFrameBuffer[destx],
+                                     instance->mFrameBuffer[destx + 1],
+                                     instance->mFrameBuffer[destx + 2]);
+                }
+            }
+        }
+        rfbMarkRectAsModified(instance->mVNCServer, order->x, order->y, order->x+order->w, order->y+order->h);
+    }
+}
+
+
+/**
+ * Set the mouse pointer shape.
+ *
+ * @param hServer  Handle of VRDE server instance.
+ * @param pPointer The pointer shape information.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEColorPointer(HVRDESERVER hServer,
+                                                   const VRDECOLORPOINTER *pPointer)
+{
+    VNCServerImpl *instance = (VNCServerImpl *)hServer;
+    rfbCursorPtr cursor = (rfbCursorPtr)calloc(sizeof(rfbCursor), 1);
+
+    cursor->width = pPointer->u16Width;
+    cursor->height = pPointer->u16Height;
+
+    unsigned char *mem = (unsigned char *)malloc(pPointer->u16Width * pPointer->u16Height * VNC_SIZEOFRGBA);
+    cursor->richSource = mem;
+
+    unsigned char *maskmem = (unsigned char *)malloc(pPointer->u16Width * pPointer->u16Height);
+    cursor->mask = maskmem;
+
+    unsigned char *mask = (unsigned char *)pPointer + sizeof(VRDECOLORPOINTER);
+
+    for(int i = pPointer->u16Height - 1; i >= 0 ; i--)
+    {
+        for(uint16_t j = 0; j < pPointer->u16Width/8; j ++)
+        {
+            *maskmem = ~(*(mask + i * (pPointer->u16Width / 8) + j));
+            *maskmem++;
+        }
+    }
+    unsigned char *color = (unsigned char *)pPointer + sizeof(VRDECOLORPOINTER) + pPointer->u16MaskLen;
+    for(int i = pPointer->u16Height - 1; i >= 0 ; i--)
+    {
+        for(uint16_t j = 0; j < pPointer->u16Width; j ++)
+        {
+            // put the color value;
+            *(mem++) = *(color + (i * pPointer->u16Width *3 + j * 3 + 2));
+            *(mem++) = *(color + (i * pPointer->u16Width *3 + j * 3 + 1));
+            *(mem++) = *(color + (i * pPointer->u16Width *3 + j * 3));
+            *(mem++) = 0xff;
+        }
+    }
+
+    cursor->xhot = pPointer->u16HotX;
+    cursor->yhot = pPointer->u16HotY;
+
+    rfbSetCursor(instance->mVNCServer, cursor);
+
+    if (instance->mCursor)
+        rfbFreeCursor(instance->mCursor);
+
+    instance->mCursor = cursor;
+}
+
+/**
+ * Hide the mouse pointer.
+ *
+ * @param hServer Handle of VRDE server instance.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEHidePointer(HVRDESERVER hServer)
+{
+    VNCServerImpl *pInstance = (VNCServerImpl *)hServer;
+    RT_NOREF(pInstance);
+
+    /// @todo what's behavior for this. hide doesn't seems right
+    //rfbSetCursor(pInstance->mVNCServer, NULL);
+}
+
+/**
+ * Queues the samples to be sent to clients.
+ *
+ * @param hServer    Handle of VRDE server instance.
+ * @param pvSamples  Address of samples to be sent.
+ * @param cSamples   Number of samples.
+ * @param format     Encoded audio format for these samples.
+ *
+ * @note Initialized to NULL when the application audio callbacks are NULL.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEAudioSamples(HVRDESERVER hServer,
+                                                   const void *pvSamples,
+                                                   uint32_t cSamples,
+                                                   VRDEAUDIOFORMAT format)
+{
+    RT_NOREF(hServer, pvSamples, cSamples, format);
+}
+
+/**
+ * Sets the sound volume on clients.
+ *
+ * @param hServer    Handle of VRDE server instance.
+ * @param left       0..0xFFFF volume level for left channel.
+ * @param right      0..0xFFFF volume level for right channel.
+ *
+ * @note Initialized to NULL when the application audio callbacks are NULL.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEAudioVolume(HVRDESERVER hServer,
+                                                  uint16_t u16Left,
+                                                  uint16_t u16Right)
+{
+    RT_NOREF(hServer, u16Left, u16Right);
+}
+
+/**
+ * Sends a USB request.
+ *
+ * @param hServer      Handle of VRDE server instance.
+ * @param u32ClientId  An identifier that allows the server to find the corresponding client.
+ *                     The identifier is always passed by the server as a parameter
+ *                     of the FNVRDEUSBCALLBACK. Note that the value is the same as
+ *                     in the VRDESERVERCALLBACK functions.
+ * @param pvParm       Function specific parameters buffer.
+ * @param cbParm       Size of the buffer.
+ *
+ * @note Initialized to NULL when the application USB callbacks are NULL.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEUSBRequest(HVRDESERVER hServer,
+                                                 uint32_t u32ClientId,
+                                                 void *pvParm,
+                                                 uint32_t cbParm)
+{
+    RT_NOREF(hServer, u32ClientId, pvParm, cbParm);
+}
+
+/**
+ * Called by the application when (VRDE_CLIPBOARD_FUNCTION_*):
+ *   - (0) guest announces available clipboard formats;
+ *   - (1) guest requests clipboard data;
+ *   - (2) guest responds to the client's request for clipboard data.
+ *
+ * @param hServer     The VRDE server handle.
+ * @param u32Function The cause of the call.
+ * @param u32Format   Bitmask of announced formats or the format of data.
+ * @param pvData      Points to: (1) buffer to be filled with clients data;
+ *                               (2) data from the host.
+ * @param cbData      Size of 'pvData' buffer in bytes.
+ * @param pcbActualRead Size of the copied data in bytes.
+ *
+ * @note Initialized to NULL when the application clipboard callbacks are NULL.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEClipboard(HVRDESERVER hServer,
+                                                uint32_t u32Function,
+                                                uint32_t u32Format,
+                                                void *pvData,
+                                                uint32_t cbData,
+                                                uint32_t *pcbActualRead)
+{
+    RT_NOREF(hServer, u32Function, u32Format, pvData, cbData, pcbActualRead);
+}
+
+/**
+ * Query various information from the VRDE server.
+ *
+ * @param hServer   The VRDE server handle.
+ * @param index     VRDE_QI_* identifier of information to be returned.
+ * @param pvBuffer  Address of memory buffer to which the information must be written.
+ * @param cbBuffer  Size of the memory buffer in bytes.
+ * @param pcbOut    Size in bytes of returned information value.
+ *
+ * @remark The caller must check the *pcbOut. 0 there means no information was returned.
+ *         A value greater than cbBuffer means that information is too big to fit in the
+ *         buffer, in that case no information was placed to the buffer.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEQueryInfo(HVRDESERVER hServer,
+                                                uint32_t index,
+                                                void *pvBuffer,
+                                                uint32_t cbBuffer,
+                                                uint32_t *pcbOut)
+{
+    VNCServerImpl *instance = (VNCServerImpl *)hServer;
+    *pcbOut = 0;
+
+    switch (index)
+    {
+        case VRDE_QI_ACTIVE:    /* # of active clients */
+        case VRDE_QI_NUMBER_OF_CLIENTS: /* # of connected clients */
+        {
+            uint32_t cbOut = sizeof(uint32_t);
+            if (cbBuffer >= cbOut)
+            {
+                *pcbOut = cbOut;
+                *(uint32_t *)pvBuffer = instance->uClients;
+            }
+            break;
+        }
+        /// @todo lots more queries to implement
+        default:
+            break;
+    }
+}
+
+
+/**
+ * The server should redirect the client to the specified server.
+ *
+ * @param hServer       The server instance handle.
+ * @param u32ClientId   The client identifier.
+ * @param pszServer     The server to redirect the client to.
+ * @param pszUser       The username to use for the redirection.
+ *                      Can be NULL.
+ * @param pszDomain     The domain. Can be NULL.
+ * @param pszPassword   The password. Can be NULL.
+ * @param u32SessionId  The ID of the session to redirect to.
+ * @param pszCookie     The routing token used by a load balancer to
+ *                      route the redirection. Can be NULL.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDERedirect(HVRDESERVER hServer,
+                                               uint32_t u32ClientId,
+                                               const char *pszServer,
+                                               const char *pszUser,
+                                               const char *pszDomain,
+                                               const char *pszPassword,
+                                               uint32_t u32SessionId,
+                                               const char *pszCookie)
+{
+    RT_NOREF(hServer, u32ClientId, pszServer, pszUser, pszDomain, pszPassword, u32SessionId, pszCookie);
+}
+
+/**
+ * Audio input open request.
+ *
+ * @param hServer      Handle of VRDE server instance.
+ * @param pvCtx        To be used in VRDECallbackAudioIn.
+ * @param u32ClientId  An identifier that allows the server to find the corresponding client.
+ * @param audioFormat  Preferred format of audio data.
+ * @param u32SamplesPerBlock Preferred number of samples in one block of audio input data.
+ *
+ * @note Initialized to NULL when the VRDECallbackAudioIn callback is NULL.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEAudioInOpen(HVRDESERVER hServer,
+                                                  void *pvCtx,
+                                                  uint32_t u32ClientId,
+                                                  VRDEAUDIOFORMAT audioFormat,
+                                                  uint32_t u32SamplesPerBlock)
+{
+    RT_NOREF(hServer, pvCtx, u32ClientId, audioFormat, u32SamplesPerBlock);
+}
+
+/**
+ * Audio input close request.
+ *
+ * @param hServer      Handle of VRDE server instance.
+ * @param u32ClientId  An identifier that allows the server to find the corresponding client.
+ *
+ * @note Initialized to NULL when the VRDECallbackAudioIn callback is NULL.
+ */
+DECLCALLBACK(void) VNCServerImpl::VRDEAudioInClose(HVRDESERVER hServer, uint32_t u32ClientId)
+{
+    RT_NOREF(hServer, u32ClientId);
+}
+
+
+
+int VNCServerImpl::Init(const VRDEINTERFACEHDR *pCallbacks,
+                        void *pvCallback)
+{
+    if (pCallbacks->u64Version == VRDE_INTERFACE_VERSION_3)
+    {
+        mCallbacks = (VRDECALLBACKS_4 *)pCallbacks;
+        mCallback = pvCallback;
+    }
+    else if (pCallbacks->u64Version == VRDE_INTERFACE_VERSION_1)
+    {
+        /// @todo this is incorrect and it will cause crash if client call unsupport func.
+        mCallbacks = (VRDECALLBACKS_4 *)pCallbacks;
+        mCallback = pvCallback;
+
+
+        // since they are same in order, let's just change header
+        Entries.header.u64Version = VRDE_INTERFACE_VERSION_1;
+        Entries.header.u64Size = sizeof(VRDEENTRYPOINTS_1);
+    }
+    else
+        return VERR_VERSION_MISMATCH;
+
+    return VINF_SUCCESS;
+}
+
+
+void VNCServerImpl::vncKeyboardEvent(rfbBool down, rfbKeySym keycode, rfbClientPtr cl)
+{
+    VNCServerImpl *instance = static_cast<VNCServerImpl *>(cl->screen->screenData);
+    VRDEINPUTSCANCODE point;
+
+    /* Conversion table for key code range 32-127 (which happen to equal the ASCII codes).
+     * Values 0xe0?? indicate that a 0xe0 scancode will be sent first (extended keys), then code ?? is sent */
+    static unsigned codes_low[] =
+    {
+        // Conversion table for VNC key code range 32-127
+        0x39, 0x02, 0x28, 0x04, 0x05, 0x06, 0x08, 0x28, 0x0a, 0x0b, 0x09, 0x0d, 0x33, 0x0c, 0x34, 0x35, //space, !"#$%&'()*+`-./
+        0x0b, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x27, 0x27, 0x33, 0x0d, 0x34, 0x35, 0x03, //0123456789:;<=>?@
+        0x1e, 0x30, 0x2e, 0x20, 0x12, 0x21, 0x22, 0x23, 0x17, 0x24, 0x25, 0x26, 0x32, //A-M
+        0x31, 0x18, 0x19, 0x10, 0x13, 0x1f, 0x14, 0x16, 0x2f, 0x11, 0x2d, 0x15, 0x2c, //N-Z
+        0x1a, 0x2b, 0x1b, 0x07, 0x0c, 0x29, //[\]^_`
+        0x1e, 0x30, 0x2e, 0x20, 0x12, 0x21, 0x22, 0x23, 0x17, 0x24, 0x25, 0x26, 0x32, //a-m
+        0x31, 0x18, 0x19, 0x10, 0x13, 0x1f, 0x14, 0x16, 0x2f, 0x11, 0x2d, 0x15, 0x2c, //n-z
+        0x1a, 0x2b, 0x1b, 0x29 //{|}~
+    };
+
+    int code = -1;
+    if (keycode < 32)
+    {
+        //ASCII control codes.. unused..
+    }
+    else if (keycode < 127)
+    {
+        //DEL is in high area
+        code = codes_low[keycode - 32];
+    }
+    else if ((keycode & 0xFE00) != 0xFE00)
+    {
+    }
+    else
+    {
+        switch(keycode)
+        {
+        case 65027: code = 0xe038; break; //AltGr = RAlt
+        case 65288: code =   0x0e; break; //Backspace
+        case 65289: code =   0x0f; break; //Tab
+
+        case 65293: code =   0x1c; break; //Return
+            //case 65299: break; Pause/break
+        case 65300: code =   0x46; break; //ScrollLock
+            //case 65301: break; SysRq
+        case 65307: code =   0x01; break; //Escape
+
+        case 65360: code = 0xe047; break; //Home
+        case 65361: code = 0xe04b; break; //Left
+        case 65362: code = 0xe048; break; //Up
+        case 65363: code = 0xe04d; break; //Right
+        case 65364: code = 0xe050; break; //Down
+        case 65365: code = 0xe049; break; //Page up
+        case 65366: code = 0xe051; break; //Page down
+        case 65367: code = 0xe04f; break; //End
+
+            //case 65377: break; //Print screen
+        case 65379: code = 0xe052; break; //Insert
+
+        case 65383: code = 0xe05d; break; //Menu
+        case 65407: code =   0x45; break; //NumLock
+
+        case 65421: code = 0xe01c; break; //Numpad return
+        case 65429: code =   0x47; break; //Numpad home
+        case 65430: code =   0x4b; break; //Numpad left
+        case 65431: code =   0x48; break; //Numpad up
+        case 65432: code =   0x4d; break; //Numpad right
+        case 65433: code =   0x50; break; //Numpad down
+        case 65434: code =   0x49; break; //Numpad page up
+        case 65435: code =   0x51; break; //Numpad page down
+        case 65436: code =   0x4f; break; //Numpad end
+        case 65437: code =   0x4c; break; //Numpad begin
+        case 65438: code =   0x52; break; //Numpad ins
+        case 65439: code =   0x53; break; //Numpad del
+        case 65450: code =   0x37; break; //Numpad *
+        case 65451: code =   0x4e; break; //Numpad +
+        case 65452: code =   0x53; break; //Numpad separator
+        case 65453: code =   0x4a; break; //Numpad -
+        case 65454: code =   0x53; break; //Numpad decimal
+        case 65455: code = 0xe035; break; //Numpad /
+        case 65456: code =   0x52; break; //Numpad 0
+        case 65457: code =   0x4f; break; //Numpad 1
+        case 65458: code =   0x50; break; //Numpad 2
+        case 65459: code =   0x51; break; //Numpad 3
+        case 65460: code =   0x4b; break; //Numpad 4
+        case 65461: code =   0x4c; break; //Numpad 5
+        case 65462: code =   0x4d; break; //Numpad 6
+        case 65463: code =   0x47; break; //Numpad 7
+        case 65464: code =   0x48; break; //Numpad 8
+        case 65465: code =   0x49; break; //Numpad 9
+
+        case 65470: code =   0x3b; break; //F1
+        case 65471: code =   0x3c; break; //F2
+        case 65472: code =   0x3d; break; //F3
+        case 65473: code =   0x3e; break; //F4
+        case 65474: code =   0x3f; break; //F5
+        case 65475: code =   0x40; break; //F6
+        case 65476: code =   0x41; break; //F7
+        case 65477: code =   0x42; break; //F8
+        case 65478: code =   0x43; break; //F9
+        case 65479: code =   0x44; break; //F10
+        case 65480: code =   0x57; break; //F11
+        case 65481: code =   0x58; break; //F12
+
+        case 65505: code =   0x2a; break; //Left shift
+        case 65506: code =   0x36; break; //Right shift
+        case 65507: code =   0x1d; break; //Left ctrl
+        case 65508: code = 0xe01d; break; //Right ctrl
+        case 65509: code =   0x3a; break; //Caps Lock
+        case 65510: code =   0x3a; break; //Shift Lock
+        case 65513: code =   0x38; break; //Left Alt
+        case 65514: code = 0xe038; break; //Right Alt
+        case 65515: code = 0xe05b; break; //Left windows key
+        case 65516: code = 0xe05c; break; //Right windows key
+        case 65535: code = 0xe053; break; //Delete
+        }
+    }
+
+    if (code == -1)
+    {
+        LogRel(("VNC: unhandled keyboard code: down=%d code=%d\n", down, keycode));
+        return;
+    }
+    if (code > 0xff)
+    {
+        point.uScancode = (code >> 8) & 0xff;
+        instance->mCallbacks->VRDECallbackInput(instance->mCallback, VRDE_INPUT_SCANCODE, &point, sizeof(point));
+    }
+
+    point.uScancode = (code & 0xff) | (down ? 0 : 0x80);
+    instance->mCallbacks->VRDECallbackInput(instance->mCallback, VRDE_INPUT_SCANCODE, &point, sizeof(point));
+}
+
+void VNCServerImpl::vncMouseEvent(int buttonMask, int x, int y, rfbClientPtr cl)
+{
+    VNCServerImpl *instance = static_cast<VNCServerImpl *>(cl->screen->screenData);
+
+    VRDEINPUTPOINT point;
+    unsigned button = 0;
+    if (buttonMask & 1) button |= VRDE_INPUT_POINT_BUTTON1;
+    if (buttonMask & 2) button |= VRDE_INPUT_POINT_BUTTON3;
+    if (buttonMask & 4) button |= VRDE_INPUT_POINT_BUTTON2;
+    if (buttonMask & 8) button |= VRDE_INPUT_POINT_WHEEL_UP;
+    if (buttonMask & 16) button |= VRDE_INPUT_POINT_WHEEL_DOWN;
+    point.uButtons = button;
+    point.x = x;
+    point.y = y;
+    instance->mCallbacks->VRDECallbackInput(instance->mCallback, VRDE_INPUT_POINT, &point, sizeof(point));
+    rfbDefaultPtrAddEvent(buttonMask, x, y, cl);
+}
+
+enum rfbNewClientAction VNCServerImpl::rfbNewClientEvent(rfbClientPtr cl)
+{
+    VNCServerImpl *instance = static_cast<VNCServerImpl *>(cl->screen->screenData);
+
+    /// @todo we need auth user here
+
+    instance->mCallbacks->VRDECallbackClientConnect(instance->mCallback, (int)cl->sock);
+    instance->uClients++;
+
+    cl->clientGoneHook = clientGoneHook;
+
+    return RFB_CLIENT_ACCEPT;
+}
+
+void VNCServerImpl::clientGoneHook(rfbClientPtr cl)
+{
+    VNCServerImpl *instance = static_cast<VNCServerImpl *>(cl->screen->screenData);
+
+    instance->uClients--;
+    instance->mCallbacks->VRDECallbackClientDisconnect(instance->mCallback, (int)cl->sock, 0);
+}
+
+VNCServerImpl *g_VNCServer = 0;
+
+DECLEXPORT(int) VRDECreateServer(const VRDEINTERFACEHDR *pCallbacks,
+                                 void *pvCallback,
+                                 VRDEINTERFACEHDR **ppEntryPoints,
+                                 HVRDESERVER *phServer)
+{
+    if (!g_VNCServer)
+    {
+        g_VNCServer = new VNCServerImpl();
+    }
+
+    int rc = g_VNCServer->Init(pCallbacks, pvCallback);
+
+    if (RT_SUCCESS(rc))
+    {
+        *ppEntryPoints = g_VNCServer->GetInterface();
+        *phServer = (HVRDESERVER)g_VNCServer;
+    }
+
+    return rc;
+}
+
+static const char * const supportedProperties[] =
+{
+    "TCP/Ports",
+    "TCP/Address",
+    NULL
+};
+
+DECLEXPORT(const char * const *) VRDESupportedProperties(void)
+{
+    LogFlowFunc(("enter\n"));
+    return supportedProperties;
+}
diff --git a/src/VBox/ExtPacks/VNC/VBoxVNCMain.cpp b/src/VBox/ExtPacks/VNC/VBoxVNCMain.cpp
new file mode 100644
index 00000000..7702f03b
--- /dev/null
+++ b/src/VBox/ExtPacks/VNC/VBoxVNCMain.cpp
@@ -0,0 +1,127 @@
+/* $Id: VBoxVNCMain.cpp $ */
+/** @file
+ * VNC main module.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <VBox/ExtPack/ExtPack.h>
+
+#include <iprt/errcore.h>
+#include <VBox/version.h>
+#include <iprt/string.h>
+#include <iprt/param.h>
+#include <iprt/path.h>
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+/** Pointer to the extension pack helpers. */
+static PCVBOXEXTPACKHLP g_pHlp;
+
+
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnInstalled}
+//  */
+// static DECLCALLBACK(void) vboxVNCExtPack_Installed(PCVBOXEXTPACKREG pThis, VBOXEXTPACK_IF_CS(IVirtualBox) *pVirtualBox, PRTERRINFO pErrInfo);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnUninstall}
+//  */
+// static DECLCALLBACK(int)  vboxVNCExtPack_Uninstall(PCVBOXEXTPACKREG pThis, VBOXEXTPACK_IF_CS(IVirtualBox) *pVirtualBox);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnVirtualBoxReady}
+//  */
+// static DECLCALLBACK(void)  vboxVNCExtPack_VirtualBoxReady(PCVBOXEXTPACKREG pThis, VBOXEXTPACK_IF_CS(IVirtualBox) *pVirtualBox);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnUnload}
+//  */
+// static DECLCALLBACK(void) vboxVNCExtPack_Unload(PCVBOXEXTPACKREG pThis);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnVMCreated}
+//  */
+// static DECLCALLBACK(int)  vboxVNCExtPack_VMCreated(PCVBOXEXTPACKREG pThis, VBOXEXTPACK_IF_CS(IVirtualBox) *pVirtualBox, VBOXEXTPACK_IF_CS(IMachine) *pMachine);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnQueryObject}
+//  */
+// static DECLCALLBACK(void) vboxVNCExtPack_QueryObject(PCVBOXEXTPACKREG pThis, PCRTUUID pObjectId);
+
+
+static const VBOXEXTPACKREG g_vboxVNCExtPackReg =
+{
+    VBOXEXTPACKREG_VERSION,
+    /* .uVBoxFullVersion =  */  VBOX_FULL_VERSION,
+    /* .pszNlsBaseName =    */  NULL,
+    /* .pfnInstalled =      */  NULL,
+    /* .pfnUninstall =      */  NULL,
+    /* .pfnVirtualBoxReady =*/  NULL,
+    /* .pfnUnload =         */  NULL,
+    /* .pfnVMCreated =      */  NULL,
+    /* .pfnQueryObject =    */  NULL,
+    /* .pfnReserved1 =      */  NULL,
+    /* .pfnReserved2 =      */  NULL,
+    /* .pfnReserved3 =      */  NULL,
+    /* .pfnReserved4 =      */  NULL,
+    /* .pfnReserved5 =      */  NULL,
+    /* .pfnReserved6 =      */  NULL,
+    /* .uReserved7 =        */  0,
+    VBOXEXTPACKREG_VERSION
+};
+
+
+/** @callback_method_impl{FNVBOXEXTPACKREGISTER}  */
+extern "C" DECLEXPORT(int) VBoxExtPackRegister(PCVBOXEXTPACKHLP pHlp, PCVBOXEXTPACKREG *ppReg, PRTERRINFO pErrInfo)
+{
+    /*
+     * Check the VirtualBox version.
+     */
+    if (!VBOXEXTPACK_IS_VER_COMPAT(pHlp->u32Version, VBOXEXTPACKHLP_VERSION))
+        return RTErrInfoSetF(pErrInfo, VERR_VERSION_MISMATCH,
+                             "Helper version mismatch - expected %#x got %#x",
+                             VBOXEXTPACKHLP_VERSION, pHlp->u32Version);
+    if (   VBOX_FULL_VERSION_GET_MAJOR(pHlp->uVBoxFullVersion) != VBOX_VERSION_MAJOR
+        || VBOX_FULL_VERSION_GET_MINOR(pHlp->uVBoxFullVersion) != VBOX_VERSION_MINOR)
+        return RTErrInfoSetF(pErrInfo, VERR_VERSION_MISMATCH,
+                             "VirtualBox version mismatch - expected %u.%u got %u.%u",
+                             VBOX_VERSION_MAJOR, VBOX_VERSION_MINOR,
+                             VBOX_FULL_VERSION_GET_MAJOR(pHlp->uVBoxFullVersion),
+                             VBOX_FULL_VERSION_GET_MINOR(pHlp->uVBoxFullVersion));
+
+    /*
+     * We're good, save input and return the registration structure.
+     */
+    g_pHlp = pHlp;
+    *ppReg = &g_vboxVNCExtPackReg;
+
+    return VINF_SUCCESS;
+}
+