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/*
* openvpnmsica -- Custom Action DLL to provide OpenVPN-specific support to MSI packages
* https://community.openvpn.net/openvpn/wiki/OpenVPNMSICA
*
* Copyright (C) 2018 Simon Rozman <simon@rozman.si>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MSICA_H
#define MSICA_H
#include <windows.h>
#include <msi.h>
#include "../tapctl/basic.h"
/*
* Error codes (next unused 2552L)
*/
#define ERROR_MSICA 2550L
#define ERROR_MSICA_ERRNO 2551L
/**
* Thread local storage data
*/
struct openvpnmsica_thread_data
{
MSIHANDLE hInstall; /** Handle to the installation session. */
};
/**
* MSI session handle thread local storage index
*/
extern DWORD openvpnmsica_thread_data_idx;
/**
* Set MSI session handle in thread local storage.
*/
#define OPENVPNMSICA_SAVE_MSI_SESSION(hInstall) \
{ \
struct openvpnmsica_thread_data *s = (struct openvpnmsica_thread_data *)TlsGetValue(openvpnmsica_thread_data_idx); \
s->hInstall = (hInstall); \
}
/*
* Exported DLL Functions
*/
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __GNUC__
#define DLLEXP_DECL __declspec(dllexport)
#else
#define DLLEXP_DECL
#define DLLEXP_EXPORT "/EXPORT:" __FUNCTION__ "=" __FUNCDNAME__
#endif
/**
* Determines Windows information:
*
* - Sets `OPENVPNSERVICE` MSI property to PID of OpenVPN Service if running, or its EXE path if
* configured for auto-start.
*
* - Finds existing TAP-Windows6 adapters and set TAPWINDOWS6ADAPTERS and
* ACTIVETAPWINDOWS6ADAPTERS properties with semicolon delimited list of all installed adapter
* GUIDs and active adapter GUIDs respectively.
*
* - Finds existing Wintun adapters and set WINTUNADAPTERS and ACTIVEWINTUNADAPTERS properties
* with semicolon delimited list of all installed adapter GUIDs and active adapter GUIDs
* respectively.
*
* @param hInstall Handle to the installation provided to the DLL custom action
*
* @return ERROR_SUCCESS on success; An error code otherwise
* See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa368072.aspx
*/
DLLEXP_DECL UINT __stdcall
FindSystemInfo(_In_ MSIHANDLE hInstall);
/**
* Find OpenVPN GUI window and send it a WM_CLOSE message.
*
* @param hInstall Handle to the installation provided to the DLL custom action
*
* @return ERROR_SUCCESS on success; An error code otherwise
* See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa368072.aspx
*/
DLLEXP_DECL UINT __stdcall
CloseOpenVPNGUI(_In_ MSIHANDLE hInstall);
/**
* Launches OpenVPN GUI. It's path is obtained by expanding the `[#bin.openvpn_gui.exe]`
* therefore, its Id field in File table must be "bin.openvpn_gui.exe".
*
* @param hInstall Handle to the installation provided to the DLL custom action
*
* @return ERROR_SUCCESS on success; An error code otherwise
* See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa368072.aspx
*/
DLLEXP_DECL UINT __stdcall
StartOpenVPNGUI(_In_ MSIHANDLE hInstall);
/**
* Evaluate the TUNTAPAdapter table of the MSI package database and prepare a list of TAP
* adapters to install/remove.
*
* @param hInstall Handle to the installation provided to the DLL custom action
*
* @return ERROR_SUCCESS on success; An error code otherwise
* See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa368072.aspx
*/
DLLEXP_DECL UINT __stdcall
EvaluateTUNTAPAdapters(_In_ MSIHANDLE hInstall);
/**
* Perform scheduled deferred action.
*
* @param hInstall Handle to the installation provided to the DLL custom action
*
* @return ERROR_SUCCESS on success; An error code otherwise
* See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa368072.aspx
*/
DLLEXP_DECL UINT __stdcall
ProcessDeferredAction(_In_ MSIHANDLE hInstall);
#ifdef __cplusplus
}
#endif
#endif /* ifndef MSICA_H */
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