| 1 |
/* -*- c-basic-offset: 8 -*- |
| 2 |
rdesktop: A Remote Desktop Protocol client. |
| 3 |
Seamless windows - Remote server hook DLL |
| 4 |
|
| 5 |
Based on code copyright (C) 2004-2005 Martin Wickett |
| 6 |
|
| 7 |
Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006 |
| 8 |
Copyright (C) Pierre Ossman <ossman@cendio.se> 2006 |
| 9 |
|
| 10 |
This program is free software; you can redistribute it and/or modify |
| 11 |
it under the terms of the GNU General Public License as published by |
| 12 |
the Free Software Foundation; either version 2 of the License, or |
| 13 |
(at your option) any later version. |
| 14 |
|
| 15 |
This program is distributed in the hope that it will be useful, |
| 16 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 |
GNU General Public License for more details. |
| 19 |
|
| 20 |
You should have received a copy of the GNU General Public License |
| 21 |
along with this program; if not, write to the Free Software |
| 22 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 |
*/ |
| 24 |
|
| 25 |
#include <stdio.h> |
| 26 |
#include <stdarg.h> |
| 27 |
|
| 28 |
#include <windows.h> |
| 29 |
#include <winuser.h> |
| 30 |
|
| 31 |
#include "../vchannel.h" |
| 32 |
|
| 33 |
#define DLL_EXPORT __declspec(dllexport) |
| 34 |
|
| 35 |
// Shared DATA |
| 36 |
#pragma data_seg ( "SHAREDDATA" ) |
| 37 |
|
| 38 |
// this is the total number of processes this dll is currently attached to |
| 39 |
int g_instance_count = 0; |
| 40 |
|
| 41 |
#pragma data_seg () |
| 42 |
|
| 43 |
#pragma comment(linker, "/section:SHAREDDATA,rws") |
| 44 |
|
| 45 |
static HHOOK g_cbt_hook = NULL; |
| 46 |
static HHOOK g_wndproc_hook = NULL; |
| 47 |
|
| 48 |
static HINSTANCE g_instance = NULL; |
| 49 |
|
| 50 |
static HANDLE g_mutex = NULL; |
| 51 |
|
| 52 |
static void |
| 53 |
update_position(HWND hwnd) |
| 54 |
{ |
| 55 |
RECT rect; |
| 56 |
|
| 57 |
if (!GetWindowRect(hwnd, &rect)) |
| 58 |
{ |
| 59 |
debug("GetWindowRect failed!\n"); |
| 60 |
return; |
| 61 |
} |
| 62 |
|
| 63 |
vchannel_write("POSITION1,0x%p,%d,%d,%d,%d,0x%x", |
| 64 |
hwnd, |
| 65 |
rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0); |
| 66 |
} |
| 67 |
|
| 68 |
static LRESULT CALLBACK |
| 69 |
wndproc_hook_proc(int code, WPARAM cur_thread, LPARAM details) |
| 70 |
{ |
| 71 |
HWND hwnd; |
| 72 |
UINT msg; |
| 73 |
WPARAM wparam; |
| 74 |
LPARAM lparam; |
| 75 |
|
| 76 |
LONG style; |
| 77 |
|
| 78 |
if (code < 0) |
| 79 |
goto end; |
| 80 |
|
| 81 |
hwnd = ((CWPSTRUCT *) details)->hwnd; |
| 82 |
msg = ((CWPSTRUCT *) details)->message; |
| 83 |
wparam = ((CWPSTRUCT *) details)->wParam; |
| 84 |
lparam = ((CWPSTRUCT *) details)->lParam; |
| 85 |
|
| 86 |
style = GetWindowLong(hwnd, GWL_STYLE); |
| 87 |
|
| 88 |
/* Docs say that WS_CHILD and WS_POPUP is an illegal combination, |
| 89 |
but they exist nonetheless. */ |
| 90 |
if ((style & WS_CHILD) && !(style & WS_POPUP)) |
| 91 |
goto end; |
| 92 |
|
| 93 |
switch (msg) |
| 94 |
{ |
| 95 |
|
| 96 |
case WM_WINDOWPOSCHANGED: |
| 97 |
{ |
| 98 |
WINDOWPOS *wp = (WINDOWPOS *) lparam; |
| 99 |
|
| 100 |
if (wp->flags & SWP_SHOWWINDOW) |
| 101 |
{ |
| 102 |
// FIXME: Now, just like create! |
| 103 |
debug("SWP_SHOWWINDOW for %p!", hwnd); |
| 104 |
vchannel_write("CREATE1,0x%p,0x%x", hwnd, 0); |
| 105 |
|
| 106 |
// FIXME: SETSTATE |
| 107 |
|
| 108 |
update_position(hwnd); |
| 109 |
} |
| 110 |
|
| 111 |
if (wp->flags & SWP_HIDEWINDOW) |
| 112 |
vchannel_write("DESTROY1,0x%p,0x%x", hwnd, 0); |
| 113 |
|
| 114 |
if (!(style & WS_VISIBLE)) |
| 115 |
break; |
| 116 |
|
| 117 |
if (!(wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE)) |
| 118 |
update_position(hwnd); |
| 119 |
|
| 120 |
if (!(wp->flags & SWP_NOZORDER)) |
| 121 |
{ |
| 122 |
vchannel_write("ZCHANGE1,0x%p,0x%p,0x%x", |
| 123 |
hwnd, |
| 124 |
wp->flags & SWP_NOACTIVATE ? wp-> |
| 125 |
hwndInsertAfter : 0, 0); |
| 126 |
} |
| 127 |
|
| 128 |
break; |
| 129 |
} |
| 130 |
|
| 131 |
case WM_SIZE: |
| 132 |
update_position(hwnd); |
| 133 |
break; |
| 134 |
|
| 135 |
case WM_MOVE: |
| 136 |
update_position(hwnd); |
| 137 |
break; |
| 138 |
|
| 139 |
case WM_DESTROY: |
| 140 |
vchannel_write("DESTROY1,0x%p,0x%x", hwnd, 0); |
| 141 |
break; |
| 142 |
|
| 143 |
default: |
| 144 |
break; |
| 145 |
} |
| 146 |
|
| 147 |
end: |
| 148 |
return CallNextHookEx(g_wndproc_hook, code, cur_thread, details); |
| 149 |
} |
| 150 |
|
| 151 |
static LRESULT CALLBACK |
| 152 |
cbt_hook_proc(int code, WPARAM wparam, LPARAM lparam) |
| 153 |
{ |
| 154 |
char title[150]; |
| 155 |
|
| 156 |
if (code < 0) |
| 157 |
goto end; |
| 158 |
|
| 159 |
switch (code) |
| 160 |
{ |
| 161 |
case HCBT_MINMAX: |
| 162 |
{ |
| 163 |
int show, state; |
| 164 |
|
| 165 |
show = LOWORD(lparam); |
| 166 |
|
| 167 |
if ((show == SW_SHOWMINIMIZED) || (show == SW_MINIMIZE)) |
| 168 |
{ |
| 169 |
MessageBox(0, |
| 170 |
"Minimizing windows is not allowed in this version. Sorry!", |
| 171 |
"SeamlessRDP", MB_OK); |
| 172 |
return 1; |
| 173 |
} |
| 174 |
|
| 175 |
GetWindowText((HWND) wparam, title, sizeof(title)); |
| 176 |
|
| 177 |
/* FIXME: Strip title of dangerous characters */ |
| 178 |
|
| 179 |
if (show == SW_SHOWNORMAL) |
| 180 |
state = 0; |
| 181 |
else if (show == SW_SHOWMINIMIZED) |
| 182 |
state = 1; |
| 183 |
else if (show == SW_SHOWMAXIMIZED) |
| 184 |
state = 2; |
| 185 |
vchannel_write("SETSTATE1,0x%p,%s,0x%x,0x%x", |
| 186 |
(HWND) wparam, title, state, 0); |
| 187 |
break; |
| 188 |
} |
| 189 |
|
| 190 |
default: |
| 191 |
break; |
| 192 |
} |
| 193 |
|
| 194 |
end: |
| 195 |
return CallNextHookEx(g_cbt_hook, code, wparam, lparam); |
| 196 |
} |
| 197 |
|
| 198 |
DLL_EXPORT void |
| 199 |
SetHooks(void) |
| 200 |
{ |
| 201 |
if (!g_cbt_hook) |
| 202 |
g_cbt_hook = SetWindowsHookEx(WH_CBT, cbt_hook_proc, g_instance, 0); |
| 203 |
|
| 204 |
if (!g_wndproc_hook) |
| 205 |
g_wndproc_hook = SetWindowsHookEx(WH_CALLWNDPROC, wndproc_hook_proc, g_instance, 0); |
| 206 |
} |
| 207 |
|
| 208 |
DLL_EXPORT void |
| 209 |
RemoveHooks(void) |
| 210 |
{ |
| 211 |
if (g_cbt_hook) |
| 212 |
UnhookWindowsHookEx(g_cbt_hook); |
| 213 |
|
| 214 |
if (g_wndproc_hook) |
| 215 |
UnhookWindowsHookEx(g_wndproc_hook); |
| 216 |
} |
| 217 |
|
| 218 |
DLL_EXPORT int |
| 219 |
GetInstanceCount() |
| 220 |
{ |
| 221 |
return g_instance_count; |
| 222 |
} |
| 223 |
|
| 224 |
BOOL APIENTRY |
| 225 |
DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved) |
| 226 |
{ |
| 227 |
switch (ul_reason_for_call) |
| 228 |
{ |
| 229 |
case DLL_PROCESS_ATTACH: |
| 230 |
// remember our instance handle |
| 231 |
g_instance = hinstDLL; |
| 232 |
|
| 233 |
g_mutex = CreateMutex(NULL, FALSE, "Local\\SeamlessDLL"); |
| 234 |
if (!g_mutex) |
| 235 |
return FALSE; |
| 236 |
|
| 237 |
WaitForSingleObject(g_mutex, INFINITE); |
| 238 |
++g_instance_count; |
| 239 |
ReleaseMutex(g_mutex); |
| 240 |
|
| 241 |
vchannel_open(); |
| 242 |
|
| 243 |
break; |
| 244 |
|
| 245 |
case DLL_THREAD_ATTACH: |
| 246 |
break; |
| 247 |
|
| 248 |
case DLL_THREAD_DETACH: |
| 249 |
break; |
| 250 |
|
| 251 |
case DLL_PROCESS_DETACH: |
| 252 |
WaitForSingleObject(g_mutex, INFINITE); |
| 253 |
--g_instance_count; |
| 254 |
ReleaseMutex(g_mutex); |
| 255 |
|
| 256 |
vchannel_close(); |
| 257 |
|
| 258 |
CloseHandle(g_mutex); |
| 259 |
|
| 260 |
break; |
| 261 |
} |
| 262 |
|
| 263 |
return TRUE; |
| 264 |
} |
Parent Directory
| 
Revision Log