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// |
/* -*- c-basic-offset: 8 -*- |
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// Copyright (C) 2004-2005 Martin Wickett |
rdesktop: A Remote Desktop Protocol client. |
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// |
Seamless windows - Remote server hook DLL |
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Based on code copyright (C) 2004-2005 Martin Wickett |
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Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006 |
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Copyright (C) Pierre Ossman <ossman@cendio.se> 2006 |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include "hookdll.h" |
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#include <windows.h> |
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#include <winuser.h> |
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#include <stdio.h> |
#include <stdio.h> |
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#include <stdarg.h> |
#include <stdarg.h> |
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#include "wtsapi32.h" |
#include <windows.h> |
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#include "cchannel.h" |
#include <winuser.h> |
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#include <wtsapi32.h> |
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#include <cchannel.h> |
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#include "hookdll.h" |
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#define DLL_EXPORT __declspec(dllexport) |
#define DLL_EXPORT __declspec(dllexport) |
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#pragma data_seg ( "SHAREDDATA" ) |
#pragma data_seg ( "SHAREDDATA" ) |
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// this is the total number of processes this dll is currently attached to |
// this is the total number of processes this dll is currently attached to |
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int iInstanceCount = 0; |
int g_instance_count = 0; |
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HWND hWnd = 0; |
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#pragma data_seg () |
#pragma data_seg () |
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#pragma comment(linker, "/section:SHAREDDATA,rws") |
#pragma comment(linker, "/section:SHAREDDATA,rws") |
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#define snprintf _snprintf |
static HHOOK g_cbt_hook = NULL; |
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static HHOOK g_wndproc_hook = NULL; |
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HHOOK hCbtProc = 0; |
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HHOOK hShellProc = 0; |
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HHOOK hWndProc = 0; |
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HINSTANCE hInst = 0; |
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HANDLE m_vcHandle = 0; |
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HANDLE hMutex = 0; |
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void SendDebug( char *format, ... ) |
static HINSTANCE g_instance = NULL; |
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{ |
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va_list argp; |
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char buf [ 256 ]; |
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sprintf( buf, "DEBUG1," ); |
static HANDLE g_mutex = NULL; |
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va_start( argp, format ); |
static HANDLE g_vchannel = NULL; |
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_vsnprintf( buf + sizeof( "DEBUG1," ) - 1, |
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sizeof( buf ) - sizeof( "DEBUG1," ) + 1, format, argp ); |
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va_end( argp ); |
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WriteToChannel( buf ); |
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} |
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static void |
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debug(char *format, ...) |
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BOOL APIENTRY DllMain( HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved ) |
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{ |
{ |
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switch ( ul_reason_for_call ) { |
va_list argp; |
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case DLL_PROCESS_ATTACH: |
char buf[256]; |
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// remember our instance handle |
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hInst = hinstDLL; |
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hMutex = CreateMutex( NULL, FALSE, "Local\\Seamless" ); |
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if (!hMutex) |
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return FALSE; |
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WaitForSingleObject( hMutex, INFINITE ); |
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++iInstanceCount; |
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ReleaseMutex( hMutex ); |
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OpenVirtualChannel(); |
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break; |
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case DLL_THREAD_ATTACH: |
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break; |
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case DLL_THREAD_DETACH: |
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break; |
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case DLL_PROCESS_DETACH: |
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WaitForSingleObject( hMutex, INFINITE ); |
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--iInstanceCount; |
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ReleaseMutex( hMutex ); |
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CloseVirtualChannel(); |
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CloseHandle( hMutex ); |
sprintf(buf, "DEBUG1,"); |
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break; |
va_start(argp, format); |
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} |
_vsnprintf(buf + sizeof("DEBUG1,") - 1, sizeof(buf) - sizeof("DEBUG1,") + 1, format, argp); |
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va_end(argp); |
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return TRUE; |
vchannel_write(buf); |
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} |
} |
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LRESULT CALLBACK CallWndProc( int nCode, WPARAM wParam, LPARAM lParam ) |
static LRESULT CALLBACK |
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wndproc_hook_proc(int code, WPARAM cur_thread, LPARAM details) |
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{ |
{ |
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char windowTitle[ 150 ] = { "" |
HWND hwnd = ((CWPSTRUCT *) details)->hwnd; |
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}; |
UINT msg = ((CWPSTRUCT *) details)->message; |
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HWND windowHandle = NULL; |
WPARAM wparam = ((CWPSTRUCT *) details)->wParam; |
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HWND windowHandle2 = NULL; |
LPARAM lparam = ((CWPSTRUCT *) details)->lParam; |
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char result[ 255 ] = { "" |
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}; |
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CWPSTRUCT *details = ( CWPSTRUCT * ) lParam; |
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CREATESTRUCT *cs = ( CREATESTRUCT * ) details->lParam; |
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LONG dwStyle = GetWindowLong( details->hwnd, GWL_STYLE ); |
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WINDOWPOS *wp = ( WINDOWPOS * ) details->lParam; |
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RECT rect; |
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if ( nCode < 0 ) { |
LONG style = GetWindowLong(hwnd, GWL_STYLE); |
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return CallNextHookEx( hWndProc, nCode, wParam, lParam ); |
WINDOWPOS *wp = (WINDOWPOS *) lparam; |
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} |
RECT rect; |
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switch ( details->message ) { |
if (code < 0) |
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goto end; |
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case WM_WINDOWPOSCHANGED: |
switch (msg) |
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if ( dwStyle & WS_CHILD) |
{ |
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break; |
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case WM_WINDOWPOSCHANGED: |
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if (style & WS_CHILD) |
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break; |
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if ( wp->flags & SWP_SHOWWINDOW ) { |
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// FIXME: Now, just like create! |
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SendDebug("SWP_SHOWWINDOW for %p!", details->hwnd); |
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WriteToChannel( "CREATE1,0x%p,0x%x", details->hwnd, 0 ); |
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// FIXME: SETSTATE |
if (wp->flags & SWP_SHOWWINDOW) |
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{ |
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// FIXME: Now, just like create! |
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debug("SWP_SHOWWINDOW for %p!", hwnd); |
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vchannel_write("CREATE1,0x%p,0x%x", hwnd, 0); |
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if ( !GetWindowRect( details->hwnd, &rect ) ) { |
// FIXME: SETSTATE |
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SendDebug( "GetWindowRect failed!\n" ); |
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break; |
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} |
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WriteToChannel( "POSITION1,0x%p,%d,%d,%d,%d,0x%x", |
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details->hwnd, |
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rect.left, rect.top, |
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rect.right - rect.left, |
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rect.bottom - rect.top, |
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0 ); |
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} |
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if (!GetWindowRect(hwnd, &rect)) |
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{ |
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debug("GetWindowRect failed!\n"); |
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break; |
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} |
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vchannel_write("POSITION1,0x%p,%d,%d,%d,%d,0x%x", |
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hwnd, |
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rect.left, rect.top, |
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rect.right - rect.left, rect.bottom - rect.top, 0); |
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} |
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if ( wp->flags & SWP_HIDEWINDOW ) |
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WriteToChannel( "DESTROY1,0x%p,0x%x", details->hwnd, 0 ); |
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if (wp->flags & SWP_HIDEWINDOW) |
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vchannel_write("DESTROY1,0x%p,0x%x", hwnd, 0); |
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if ( !( dwStyle & WS_VISIBLE ) ) |
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break; |
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if ( wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE ) |
if (!(style & WS_VISIBLE)) |
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break; |
break; |
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if ( !GetWindowRect( details->hwnd, &rect ) ) { |
if (wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE) |
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SendDebug( "GetWindowRect failed!\n" ); |
break; |
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break; |
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} |
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WriteToChannel( "POSITION1,0x%p,%d,%d,%d,%d,0x%x", |
if (!GetWindowRect(hwnd, &rect)) |
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details->hwnd, |
{ |
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rect.left, rect.top, |
debug("GetWindowRect failed!\n"); |
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rect.right - rect.left, |
break; |
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rect.bottom - rect.top, |
} |
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0 ); |
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break; |
vchannel_write("POSITION1,0x%p,%d,%d,%d,%d,0x%x", |
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hwnd, |
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rect.left, rect.top, |
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rect.right - rect.left, rect.bottom - rect.top, 0); |
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break; |
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/* Note: WM_WINDOWPOSCHANGING/WM_WINDOWPOSCHANGED are |
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strange. Sometimes, for example when bringing up the |
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Notepad About dialog, only an WM_WINDOWPOSCHANGING is |
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sent. In some other cases, for exmaple when opening |
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Format->Text in Notepad, both events are sent. Also, for |
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some reason, when closing the Notepad About dialog, an |
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WM_WINDOWPOSCHANGING event is sent which looks just like |
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the event that was sent when the About dialog was opened... */ |
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case WM_WINDOWPOSCHANGING: |
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if ( dwStyle & WS_CHILD) |
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break; |
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if ( !( dwStyle & WS_VISIBLE ) ) |
/* Note: WM_WINDOWPOSCHANGING/WM_WINDOWPOSCHANGED are |
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break; |
strange. Sometimes, for example when bringing up the |
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Notepad About dialog, only an WM_WINDOWPOSCHANGING is |
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sent. In some other cases, for exmaple when opening |
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Format->Text in Notepad, both events are sent. Also, for |
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some reason, when closing the Notepad About dialog, an |
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WM_WINDOWPOSCHANGING event is sent which looks just like |
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the event that was sent when the About dialog was opened... */ |
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case WM_WINDOWPOSCHANGING: |
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if (style & WS_CHILD) |
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break; |
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if ( !( wp->flags & SWP_NOZORDER ) ) |
if (!(style & WS_VISIBLE)) |
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WriteToChannel( "ZCHANGE1,0x%p,0x%p,0x%x", |
break; |
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details->hwnd, |
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wp->flags & SWP_NOACTIVATE ? wp->hwndInsertAfter : 0, |
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0 ); |
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break; |
if (!(wp->flags & SWP_NOZORDER)) |
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vchannel_write("ZCHANGE1,0x%p,0x%p,0x%x", |
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hwnd, |
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wp->flags & SWP_NOACTIVATE ? wp->hwndInsertAfter : 0, |
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0); |
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break; |
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case WM_DESTROY: |
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if ( dwStyle & WS_CHILD) |
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break; |
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WriteToChannel( "DESTROY1,0x%p,0x%x", details->hwnd, 0 ); |
case WM_DESTROY: |
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if (style & WS_CHILD) |
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break; |
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break; |
vchannel_write("DESTROY1,0x%p,0x%x", hwnd, 0); |
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break; |
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default: |
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break; |
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} |
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return CallNextHookEx( hWndProc, nCode, wParam, lParam ); |
default: |
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break; |
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} |
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end: |
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return CallNextHookEx(g_wndproc_hook, code, cur_thread, details); |
179 |
} |
} |
180 |
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LRESULT CALLBACK CbtProc( int nCode, WPARAM wParam, LPARAM lParam ) |
static LRESULT CALLBACK |
182 |
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cbt_hook_proc(int code, WPARAM wparam, LPARAM lparam) |
183 |
{ |
{ |
184 |
char windowTitle[ 150 ] = { "" |
char title[150]; |
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}; |
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HWND windowHandle = NULL; |
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char result[ 255 ] = { "" |
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}; |
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if ( nCode < 0 ) { |
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return CallNextHookEx( hCbtProc, nCode, wParam, lParam ); |
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} |
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switch ( nCode ) { |
if (code < 0) |
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case HCBT_MINMAX: |
goto end; |
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if ( ( LOWORD( lParam ) == SW_SHOWMINIMIZED ) |
switch (code) |
190 |
|| ( LOWORD( lParam ) == SW_MINIMIZE ) ) { |
{ |
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MessageBox( 0, "Minimizing windows is not allowed in this version. Sorry!", "SeamlessRDP", MB_OK ); |
case HCBT_MINMAX: |
192 |
return 1; |
{ |
193 |
} |
int show; |
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GetWindowText( ( HWND ) wParam, windowTitle, 150 ); |
show = LOWORD(lparam); |
196 |
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WriteToChannel( "SETSTATE1,0x%p,%s,0x%x,0x%x", |
if ((show == SW_SHOWMINIMIZED) || (show == SW_MINIMIZE)) |
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( HWND ) wParam, |
{ |
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windowTitle, |
MessageBox(0, |
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LOWORD( lParam ), |
"Minimizing windows is not allowed in this version. Sorry!", |
201 |
0 ); |
"SeamlessRDP", MB_OK); |
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break; |
return 1; |
203 |
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} |
204 |
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205 |
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GetWindowText((HWND) wparam, title, sizeof(title)); |
206 |
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default: |
/* FIXME: Strip title of dangerous characters */ |
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break; |
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} |
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208 |
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209 |
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vchannel_write("SETSTATE1,0x%p,%s,0x%x,0x%x", |
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(HWND) wparam, title, show, 0); |
211 |
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break; |
212 |
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} |
213 |
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214 |
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default: |
215 |
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break; |
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} |
217 |
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218 |
return CallNextHookEx( hCbtProc, nCode, wParam, lParam ); |
end: |
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return CallNextHookEx(g_cbt_hook, code, wparam, lparam); |
220 |
} |
} |
221 |
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222 |
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int |
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LRESULT CALLBACK ShellProc( int nCode, WPARAM wParam, LPARAM lParam ) |
vchannel_open() |
224 |
{ |
{ |
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char windowTitle[ 150 ] = { "" |
g_vchannel = WTSVirtualChannelOpen(WTS_CURRENT_SERVER_HANDLE, |
226 |
}; |
WTS_CURRENT_SESSION, CHANNELNAME); |
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HWND windowHandle = NULL; |
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char result[ 255 ] = { "" |
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}; |
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char strWindowId[ 25 ]; |
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LONG b, t, l, r; |
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char strW[ 5 ]; |
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char strY[ 5 ]; |
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char strX[ 5 ]; |
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char strH[ 5 ]; |
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RECT rect; |
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if ( nCode < 0 ) { |
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return CallNextHookEx( hShellProc, nCode, wParam, lParam ); |
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} |
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switch ( nCode ) { |
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case HSHELL_WINDOWCREATED: |
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227 |
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//get window id |
if (g_vchannel == NULL) |
229 |
windowHandle = ( HWND ) wParam; |
return 0; |
230 |
itoa( ( int ) windowHandle, strWindowId, 10 ); |
else |
231 |
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return 1; |
232 |
//get coords |
} |
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GetWindowRect( windowHandle, &rect ); |
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b = rect.bottom; |
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t = rect.top; |
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l = rect.left; |
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r = rect.right; |
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ltoa( b - t, strH, 10 ); |
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ltoa( t, strY, 10 ); |
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ltoa( r - l, strW, 10 ); |
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ltoa( l, strX, 10 ); |
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233 |
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234 |
//get name |
int |
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GetWindowText( windowHandle, windowTitle, 150 ); |
vchannel_close() |
236 |
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{ |
237 |
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BOOL result; |
238 |
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239 |
////setup return string |
result = WTSVirtualChannelClose(g_vchannel); |
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strcat( result, "MSG=HSHELL_WINDOWCREATED;OP=0;" ); |
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strcat( result, "ID=" ); |
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strcat( result, strWindowId ); |
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strcat( result, ";" ); |
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strcat( result, "TITLE=" ); |
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strcat( result, windowTitle ); |
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strcat( result, ";" ); |
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strcat( result, "X=" ); |
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strcat( result, strX ); |
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strcat( result, ";" ); |
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strcat( result, "Y=" ); |
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strcat( result, strY ); |
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strcat( result, ";" ); |
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strcat( result, "H=" ); |
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strcat( result, strH ); |
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strcat( result, ";" ); |
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strcat( result, "W=" ); |
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strcat( result, strW ); |
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strcat( result, "." ); |
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WriteToChannel( result ); |
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break; |
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240 |
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241 |
case HSHELL_WINDOWDESTROYED: |
g_vchannel = NULL; |
242 |
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|
243 |
//get window id |
if (result) |
244 |
windowHandle = ( HWND ) wParam; |
return 1; |
245 |
itoa( ( int ) windowHandle, strWindowId, 10 ); |
else |
246 |
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return 0; |
247 |
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} |
248 |
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|
249 |
//get coords |
int |
250 |
GetWindowRect( windowHandle, &rect ); |
vchannel_is_open() |
251 |
b = rect.bottom; |
{ |
252 |
t = rect.top; |
if (g_vchannel == NULL) |
253 |
l = rect.left; |
return 0; |
254 |
r = rect.right; |
else |
255 |
ltoa( b - t, strH, 10 ); |
return 1; |
256 |
ltoa( t, strY, 10 ); |
} |
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ltoa( r - l, strW, 10 ); |
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ltoa( l, strX, 10 ); |
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257 |
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|
258 |
//get name |
int |
259 |
GetWindowText( windowHandle, windowTitle, 150 ); |
vchannel_write(char *format, ...) |
260 |
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{ |
261 |
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BOOL result; |
262 |
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va_list argp; |
263 |
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char buf[1024]; |
264 |
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int size; |
265 |
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ULONG bytes_written; |
266 |
|
|
267 |
////setup return string |
if (!vchannel_is_open()) |
268 |
strcat( result, "MSG=HSHELL_WINDOWDESTROYED;OP=1;" ); |
return 1; |
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strcat( result, "ID=" ); |
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strcat( result, strWindowId ); |
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strcat( result, ";" ); |
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strcat( result, "TITLE=" ); |
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strcat( result, windowTitle ); |
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strcat( result, ";" ); |
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strcat( result, "X=" ); |
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strcat( result, strX ); |
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strcat( result, ";" ); |
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strcat( result, "Y=" ); |
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strcat( result, strY ); |
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strcat( result, ";" ); |
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strcat( result, "H=" ); |
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strcat( result, strH ); |
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strcat( result, ";" ); |
|
|
strcat( result, "W=" ); |
|
|
strcat( result, strW ); |
|
|
strcat( result, "." ); |
|
|
WriteToChannel( result ); |
|
|
break; |
|
269 |
|
|
270 |
|
va_start(argp, format); |
271 |
|
size = _vsnprintf(buf, sizeof(buf), format, argp); |
272 |
|
va_end(argp); |
273 |
|
|
274 |
default: |
if (size >= sizeof(buf)) |
275 |
break; |
return 0; |
|
} |
|
276 |
|
|
277 |
|
WaitForSingleObject(g_mutex, INFINITE); |
278 |
|
result = WTSVirtualChannelWrite(g_vchannel, buf, (ULONG) strlen(buf), &bytes_written); |
279 |
|
result = WTSVirtualChannelWrite(g_vchannel, "\n", (ULONG) 1, &bytes_written); |
280 |
|
ReleaseMutex(g_mutex); |
281 |
|
|
282 |
return CallNextHookEx( hShellProc, nCode, wParam, lParam ); |
if (result) |
283 |
|
return 1; |
284 |
|
else |
285 |
|
return 0; |
286 |
} |
} |
287 |
|
|
288 |
DLL_EXPORT void SetHooks( void ) |
DLL_EXPORT void |
289 |
|
SetHooks(void) |
290 |
{ |
{ |
291 |
if ( !hCbtProc ) { |
if (!g_cbt_hook) |
292 |
hCbtProc = SetWindowsHookEx( WH_CBT, ( HOOKPROC ) CbtProc, hInst, ( DWORD ) NULL ); |
g_cbt_hook = SetWindowsHookEx(WH_CBT, cbt_hook_proc, g_instance, 0); |
|
} |
|
|
|
|
|
#if 0 |
|
|
if ( !hShellProc ) { |
|
|
hShellProc = SetWindowsHookEx( WH_SHELL, ( HOOKPROC ) ShellProc, hInst, ( DWORD ) NULL ); |
|
|
} |
|
|
#endif |
|
293 |
|
|
294 |
if ( !hWndProc ) { |
if (!g_wndproc_hook) |
295 |
hWndProc = SetWindowsHookEx( WH_CALLWNDPROC, ( HOOKPROC ) CallWndProc, hInst, ( DWORD ) NULL ); |
g_wndproc_hook = SetWindowsHookEx(WH_CALLWNDPROC, wndproc_hook_proc, g_instance, 0); |
|
} |
|
296 |
} |
} |
297 |
|
|
298 |
DLL_EXPORT void RemoveHooks( void ) |
DLL_EXPORT void |
299 |
|
RemoveHooks(void) |
300 |
{ |
{ |
301 |
if ( hCbtProc ) { |
if (g_cbt_hook) |
302 |
UnhookWindowsHookEx( hCbtProc ); |
UnhookWindowsHookEx(g_cbt_hook); |
|
} |
|
303 |
|
|
304 |
if ( hShellProc ) { |
if (g_wndproc_hook) |
305 |
UnhookWindowsHookEx( hShellProc ); |
UnhookWindowsHookEx(g_wndproc_hook); |
|
} |
|
|
|
|
|
if ( hWndProc ) { |
|
|
UnhookWindowsHookEx( hWndProc ); |
|
|
} |
|
306 |
} |
} |
307 |
|
|
308 |
DLL_EXPORT int GetInstanceCount() |
DLL_EXPORT int |
309 |
|
GetInstanceCount() |
310 |
{ |
{ |
311 |
return iInstanceCount; |
return g_instance_count; |
312 |
} |
} |
313 |
|
|
314 |
int OpenVirtualChannel() |
BOOL APIENTRY |
315 |
|
DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved) |
316 |
{ |
{ |
317 |
m_vcHandle = WTSVirtualChannelOpen( WTS_CURRENT_SERVER_HANDLE, WTS_CURRENT_SESSION, CHANNELNAME ); |
switch (ul_reason_for_call) |
318 |
|
{ |
319 |
|
case DLL_PROCESS_ATTACH: |
320 |
|
// remember our instance handle |
321 |
|
g_instance = hinstDLL; |
322 |
|
|
323 |
if ( m_vcHandle == NULL ) { |
g_mutex = CreateMutex(NULL, FALSE, "Local\\Seamless"); |
324 |
return 0; |
if (!g_mutex) |
325 |
} else { |
return FALSE; |
|
return 1; |
|
|
} |
|
|
} |
|
326 |
|
|
327 |
int CloseVirtualChannel() |
WaitForSingleObject(g_mutex, INFINITE); |
328 |
{ |
++g_instance_count; |
329 |
BOOL result = WTSVirtualChannelClose( m_vcHandle ); |
ReleaseMutex(g_mutex); |
330 |
|
|
331 |
m_vcHandle = NULL; |
vchannel_open(); |
332 |
|
|
333 |
if ( result ) { |
break; |
|
return 1; |
|
|
} else { |
|
|
return 0; |
|
|
} |
|
|
} |
|
334 |
|
|
335 |
int ChannelIsOpen() |
case DLL_THREAD_ATTACH: |
336 |
{ |
break; |
|
if ( m_vcHandle == NULL ) { |
|
|
return 0; |
|
|
} else { |
|
|
return 1; |
|
|
} |
|
|
} |
|
337 |
|
|
338 |
int WriteToChannel( char *format, ... ) |
case DLL_THREAD_DETACH: |
339 |
{ |
break; |
|
BOOL result; |
|
|
va_list argp; |
|
|
char buf [ 1024 ]; |
|
|
int size; |
|
|
PULONG bytesRead = 0; |
|
|
PULONG pBytesWritten = 0; |
|
340 |
|
|
341 |
if ( !ChannelIsOpen() ) |
case DLL_PROCESS_DETACH: |
342 |
return 1; |
WaitForSingleObject(g_mutex, INFINITE); |
343 |
|
--g_instance_count; |
344 |
|
ReleaseMutex(g_mutex); |
345 |
|
|
346 |
va_start( argp, format ); |
vchannel_close(); |
|
size = _vsnprintf( buf, sizeof( buf ), format, argp ); |
|
|
va_end( argp ); |
|
347 |
|
|
348 |
if ( size >= sizeof( buf ) ) |
CloseHandle(g_mutex); |
|
return 0; |
|
349 |
|
|
350 |
WaitForSingleObject( hMutex, INFINITE ); |
break; |
351 |
result = WTSVirtualChannelWrite( m_vcHandle, buf, ( ULONG ) strlen( buf ), pBytesWritten ); |
} |
|
result = WTSVirtualChannelWrite( m_vcHandle, "\n", ( ULONG ) 1, pBytesWritten ); |
|
|
ReleaseMutex( hMutex ); |
|
352 |
|
|
353 |
if ( result ) { |
return TRUE; |
|
return 1; |
|
|
} else { |
|
|
return 0; |
|
|
} |
|
354 |
} |
} |