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diff --git a/src/VBox/Main/include/DHCPServerImpl.h b/src/VBox/Main/include/DHCPServerImpl.h
new file mode 100644
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+++ b/src/VBox/Main/include/DHCPServerImpl.h
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+/* $Id: DHCPServerImpl.h $ */
+/** @file
+ * VirtualBox COM class implementation
+ */
+
+/*
+ * Copyright (C) 2006-2023 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
+ */
+
+#ifndef MAIN_INCLUDED_DHCPServerImpl_h
+#define MAIN_INCLUDED_DHCPServerImpl_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "DHCPServerWrap.h"
+#include <map>
+
+namespace settings
+{
+    struct DHCPServer;
+    struct DhcpOptValue;
+    typedef std::map<DHCPOption_T, DhcpOptValue> DhcpOptionMap;
+}
+
+class DHCPConfig;
+class DHCPIndividualConfig;
+
+/**
+ * A DHCP server for internal host-only & NAT networks.
+ *
+ * Old notes:
+ *
+ *  for server configuration needs, it's perhaps better to use (VM,slot) pair
+ *  (vm-name, slot) <----> (MAC)
+ *
+ *  but for client configuration, when server will have MACs at hand, it'd be
+ *  easier to requiest options by MAC.
+ *  (MAC) <----> (option-list)
+ *
+ *  Doubts: What should be done if MAC changed for (vm-name, slot), when syncing should?
+ *  XML: serialization of dependecy (DHCP options) - (VM,slot) shouldn't be done via MAC in
+ *  the middle.
+ */
+class ATL_NO_VTABLE DHCPServer
+    : public DHCPServerWrap
+{
+public:
+    /** @name Constructors and destructors
+     * @{ */
+    DECLARE_COMMON_CLASS_METHODS(DHCPServer)
+    HRESULT FinalConstruct();
+    void    FinalRelease();
+
+    HRESULT init(VirtualBox *aVirtualBox, const com::Utf8Str &aName);
+    HRESULT init(VirtualBox *aVirtualBox, const settings::DHCPServer &data);
+    void    uninit();
+    /** @} */
+
+    /** @name Public internal methods.
+     * @{ */
+    HRESULT i_saveSettings(settings::DHCPServer &data);
+    HRESULT i_removeConfig(DHCPConfig *pConfig, DHCPConfigScope_T enmScope);
+    /** @} */
+
+private:
+    /** @name IDHCPServer Properties
+     * @{ */
+    HRESULT getEventSource(ComPtr<IEventSource> &aEventSource) RT_OVERRIDE;
+    HRESULT getEnabled(BOOL *aEnabled) RT_OVERRIDE;
+    HRESULT setEnabled(BOOL aEnabled) RT_OVERRIDE;
+    HRESULT getIPAddress(com::Utf8Str &aIPAddress) RT_OVERRIDE;
+    HRESULT getNetworkMask(com::Utf8Str &aNetworkMask) RT_OVERRIDE;
+    HRESULT getNetworkName(com::Utf8Str &aName) RT_OVERRIDE;
+    HRESULT getLowerIP(com::Utf8Str &aIPAddress) RT_OVERRIDE;
+    HRESULT getUpperIP(com::Utf8Str &aIPAddress) RT_OVERRIDE;
+    HRESULT setConfiguration(const com::Utf8Str &aIPAddress, const com::Utf8Str &aNetworkMask,
+                             const com::Utf8Str &aFromIPAddress, const com::Utf8Str &aToIPAddress) RT_OVERRIDE;
+    HRESULT getGlobalConfig(ComPtr<IDHCPGlobalConfig> &aGlobalConfig) RT_OVERRIDE;
+    HRESULT getGroupConfigs(std::vector<ComPtr<IDHCPGroupConfig> > &aGroupConfigs) RT_OVERRIDE;
+    HRESULT getIndividualConfigs(std::vector<ComPtr<IDHCPIndividualConfig> > &aIndividualConfigs) ;
+    /** @} */
+
+    /** @name IDHCPServer Methods
+     * @{ */
+    HRESULT start(const com::Utf8Str &aTrunkName, const com::Utf8Str &aTrunkType) RT_OVERRIDE;
+    HRESULT stop() RT_OVERRIDE;
+    HRESULT restart() RT_OVERRIDE;
+    HRESULT findLeaseByMAC(const com::Utf8Str &aMac, LONG aType, com::Utf8Str &aAddress, com::Utf8Str &aState,
+                           LONG64 *aIssued, LONG64 *aExpire) RT_OVERRIDE;
+    HRESULT getConfig(DHCPConfigScope_T aScope, const com::Utf8Str &aName, ULONG aSlot, BOOL aMayAdd,
+                      ComPtr<IDHCPConfig> &aConfig) RT_OVERRIDE;
+    /** @} */
+
+    /** @name Helpers
+     * @{  */
+    HRESULT i_doSaveSettings();
+    HRESULT i_calcLeasesConfigAndLogFilenames(const com::Utf8Str &aNetwork) RT_NOEXCEPT;
+    HRESULT i_writeDhcpdConfig(const char *pszFilename, uint32_t uMACAddressVersion) RT_NOEXCEPT;
+
+    HRESULT i_vmNameToIdAndValidateSlot(const com::Utf8Str &aVmName, ULONG a_uSlot, com::Guid &idMachine);
+    HRESULT i_vmNameAndSlotToConfig(const com::Utf8Str &a_strVmName, ULONG a_uSlot, bool a_fCreateIfNeeded,
+                                    ComObjPtr<DHCPIndividualConfig> &a_rPtrConfig);
+    /** @} */
+
+    /** Private data */
+    struct Data;
+    /** Private data. */
+    Data *m;
+};
+
+#endif /* !MAIN_INCLUDED_DHCPServerImpl_h */