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Sweden-Number/dlls/user32/hook.c

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/*
* Windows hook functions
*
* Copyright 2002 Alexandre Julliard
* Copyright 2005 Dmitry Timoshkov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* NOTES:
* Status of the various hooks:
* WH_MSGFILTER OK
* WH_JOURNALRECORD Partially implemented
* WH_JOURNALPLAYBACK Partially implemented
* WH_KEYBOARD OK
* WH_GETMESSAGE OK (FIXME: A/W mapping?)
* WH_CALLWNDPROC OK (FIXME: A/W mapping?)
* WH_CBT
* HCBT_MOVESIZE OK
* HCBT_MINMAX OK
* HCBT_QS OK
* HCBT_CREATEWND OK
* HCBT_DESTROYWND OK
* HCBT_ACTIVATE OK
* HCBT_CLICKSKIPPED OK
* HCBT_KEYSKIPPED OK
* HCBT_SYSCOMMAND OK
* HCBT_SETFOCUS OK
* WH_SYSMSGFILTER OK
* WH_MOUSE OK
* WH_HARDWARE Not supported in Win32
* WH_DEBUG Not implemented
* WH_SHELL
* HSHELL_WINDOWCREATED OK
* HSHELL_WINDOWDESTROYED OK
* HSHELL_ACTIVATESHELLWINDOW Not implemented
* HSHELL_WINDOWACTIVATED Not implemented
* HSHELL_GETMINRECT Not implemented
* HSHELL_REDRAW Not implemented
* HSHELL_TASKMAN Not implemented
* HSHELL_LANGUAGE Not implemented
* HSHELL_SYSMENU Not implemented
* HSHELL_ENDTASK Not implemented
* HSHELL_ACCESSIBILITYSTATE Not implemented
* HSHELL_APPCOMMAND Not implemented
* HSHELL_WINDOWREPLACED Not implemented
* HSHELL_WINDOWREPLACING Not implemented
* WH_FOREGROUNDIDLE Not implemented
* WH_CALLWNDPROCRET OK (FIXME: A/W mapping?)
* WH_KEYBOARD_LL Implemented but should use SendMessage instead
* WH_MOUSE_LL Implemented but should use SendMessage instead
*/
#include <stdarg.h>
#include <assert.h>
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"
#include "win.h"
#include "user_private.h"
#include "wine/server.h"
#include "wine/asm.h"
#include "wine/debug.h"
#include "winternl.h"
WINE_DEFAULT_DEBUG_CHANNEL(hook);
WINE_DECLARE_DEBUG_CHANNEL(relay);
static struct user_api_hook original_user_api =
{
USER_DefDlgProc,
USER_ScrollBarDraw,
USER_ScrollBarProc,
};
static struct user_api_hook hooked_user_api;
struct user_api_hook *user_api = &original_user_api;
struct hook_info
{
INT id;
void *proc;
void *handle;
DWORD pid, tid;
BOOL prev_unicode, next_unicode;
WCHAR module[MAX_PATH];
};
#define WH_WINEVENT (WH_MAXHOOK+1)
static const char * const hook_names[WH_WINEVENT - WH_MINHOOK + 1] =
{
"WH_MSGFILTER",
"WH_JOURNALRECORD",
"WH_JOURNALPLAYBACK",
"WH_KEYBOARD",
"WH_GETMESSAGE",
"WH_CALLWNDPROC",
"WH_CBT",
"WH_SYSMSGFILTER",
"WH_MOUSE",
"WH_HARDWARE",
"WH_DEBUG",
"WH_SHELL",
"WH_FOREGROUNDIDLE",
"WH_CALLWNDPROCRET",
"WH_KEYBOARD_LL",
"WH_MOUSE_LL",
"WH_WINEVENT"
};
/***********************************************************************
* set_windows_hook
*
* Implementation of SetWindowsHookExA and SetWindowsHookExW.
*/
static HHOOK set_windows_hook( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid, BOOL ansi )
{
WCHAR module[MAX_PATH];
UNICODE_STRING str;
if (!inst)
{
RtlInitUnicodeString( &str, NULL );
}
else
{
size_t len = GetModuleFileNameW( inst, module, ARRAYSIZE(module) );
if (!len || len >= ARRAYSIZE(module))
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
str.Buffer = module;
str.MaximumLength = str.Length = len * sizeof(WCHAR);
}
return NtUserSetWindowsHookEx( inst, &str, tid, id, proc, ansi );
}
#ifdef __i386__
/* Some apps pass a non-stdcall proc to SetWindowsHookExA,
* so we need a small assembly wrapper to call the proc.
*/
extern LRESULT HOOKPROC_wrapper( HOOKPROC proc,
INT code, WPARAM wParam, LPARAM lParam );
__ASM_GLOBAL_FUNC( HOOKPROC_wrapper,
"pushl %ebp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
"movl %esp,%ebp\n\t"
__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
"pushl %edi\n\t"
__ASM_CFI(".cfi_rel_offset %edi,-4\n\t")
"pushl %esi\n\t"
__ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
"pushl %ebx\n\t"
__ASM_CFI(".cfi_rel_offset %ebx,-12\n\t")
"pushl 20(%ebp)\n\t"
"pushl 16(%ebp)\n\t"
"pushl 12(%ebp)\n\t"
"movl 8(%ebp),%eax\n\t"
"call *%eax\n\t"
"leal -12(%ebp),%esp\n\t"
"popl %ebx\n\t"
__ASM_CFI(".cfi_same_value %ebx\n\t")
"popl %esi\n\t"
__ASM_CFI(".cfi_same_value %esi\n\t")
"popl %edi\n\t"
__ASM_CFI(".cfi_same_value %edi\n\t")
"leave\n\t"
__ASM_CFI(".cfi_def_cfa %esp,4\n\t")
__ASM_CFI(".cfi_same_value %ebp\n\t")
"ret" )
#else
static inline LRESULT HOOKPROC_wrapper( HOOKPROC proc,
INT code, WPARAM wParam, LPARAM lParam )
{
return proc( code, wParam, lParam );
}
#endif /* __i386__ */
/***********************************************************************
* call_hook_AtoW
*/
static LRESULT call_hook_AtoW( HOOKPROC proc, INT id, INT code, WPARAM wparam, LPARAM lparam )
{
LRESULT ret;
UNICODE_STRING usBuffer;
if (id != WH_CBT || code != HCBT_CREATEWND)
ret = HOOKPROC_wrapper( proc, code, wparam, lparam );
else
{
CBT_CREATEWNDA *cbtcwA = (CBT_CREATEWNDA *)lparam;
CBT_CREATEWNDW cbtcwW;
CREATESTRUCTW csW;
LPWSTR nameW = NULL;
LPWSTR classW = NULL;
cbtcwW.lpcs = &csW;
cbtcwW.hwndInsertAfter = cbtcwA->hwndInsertAfter;
csW = *(CREATESTRUCTW *)cbtcwA->lpcs;
if (!IS_INTRESOURCE(cbtcwA->lpcs->lpszName))
{
RtlCreateUnicodeStringFromAsciiz(&usBuffer,cbtcwA->lpcs->lpszName);
csW.lpszName = nameW = usBuffer.Buffer;
}
if (!IS_INTRESOURCE(cbtcwA->lpcs->lpszClass))
{
RtlCreateUnicodeStringFromAsciiz(&usBuffer,cbtcwA->lpcs->lpszClass);
csW.lpszClass = classW = usBuffer.Buffer;
}
ret = HOOKPROC_wrapper( proc, code, wparam, (LPARAM)&cbtcwW );
cbtcwA->hwndInsertAfter = cbtcwW.hwndInsertAfter;
HeapFree( GetProcessHeap(), 0, nameW );
HeapFree( GetProcessHeap(), 0, classW );
}
return ret;
}
/***********************************************************************
* call_hook_WtoA
*/
static LRESULT call_hook_WtoA( HOOKPROC proc, INT id, INT code, WPARAM wparam, LPARAM lparam )
{
LRESULT ret;
if (id != WH_CBT || code != HCBT_CREATEWND)
ret = HOOKPROC_wrapper( proc, code, wparam, lparam );
else
{
CBT_CREATEWNDW *cbtcwW = (CBT_CREATEWNDW *)lparam;
CBT_CREATEWNDA cbtcwA;
CREATESTRUCTA csA;
int len;
LPSTR nameA = NULL;
LPSTR classA = NULL;
cbtcwA.lpcs = &csA;
cbtcwA.hwndInsertAfter = cbtcwW->hwndInsertAfter;
csA = *(CREATESTRUCTA *)cbtcwW->lpcs;
if (!IS_INTRESOURCE(cbtcwW->lpcs->lpszName)) {
len = WideCharToMultiByte( CP_ACP, 0, cbtcwW->lpcs->lpszName, -1, NULL, 0, NULL, NULL );
nameA = HeapAlloc( GetProcessHeap(), 0, len*sizeof(CHAR) );
WideCharToMultiByte( CP_ACP, 0, cbtcwW->lpcs->lpszName, -1, nameA, len, NULL, NULL );
csA.lpszName = nameA;
}
if (!IS_INTRESOURCE(cbtcwW->lpcs->lpszClass)) {
len = WideCharToMultiByte( CP_ACP, 0, cbtcwW->lpcs->lpszClass, -1, NULL, 0, NULL, NULL );
classA = HeapAlloc( GetProcessHeap(), 0, len*sizeof(CHAR) );
WideCharToMultiByte( CP_ACP, 0, cbtcwW->lpcs->lpszClass, -1, classA, len, NULL, NULL );
csA.lpszClass = classA;
}
ret = HOOKPROC_wrapper( proc, code, wparam, (LPARAM)&cbtcwA );
cbtcwW->hwndInsertAfter = cbtcwA.hwndInsertAfter;
HeapFree( GetProcessHeap(), 0, nameA );
HeapFree( GetProcessHeap(), 0, classA );
}
return ret;
}
/***********************************************************************
* call_hook_proc
*/
static LRESULT call_hook_proc( HOOKPROC proc, INT id, INT code, WPARAM wparam, LPARAM lparam,
BOOL prev_unicode, BOOL next_unicode )
{
LRESULT ret;
TRACE_(relay)( "\1Call hook proc %p (id=%s,code=%x,wp=%08lx,lp=%08lx)\n",
proc, hook_names[id-WH_MINHOOK], code, wparam, lparam );
if (!prev_unicode == !next_unicode) ret = proc( code, wparam, lparam );
else if (prev_unicode) ret = call_hook_WtoA( proc, id, code, wparam, lparam );
else ret = call_hook_AtoW( proc, id, code, wparam, lparam );
TRACE_(relay)( "\1Ret hook proc %p (id=%s,code=%x,wp=%08lx,lp=%08lx) retval=%08lx\n",
proc, hook_names[id-WH_MINHOOK], code, wparam, lparam, ret );
return ret;
}
/***********************************************************************
* get_hook_proc
*
* Retrieve the hook procedure real value for a module-relative proc
*/
void *get_hook_proc( void *proc, const WCHAR *module, HMODULE *free_module )
{
HMODULE mod;
GetModuleHandleExW( 0, module, &mod );
*free_module = mod;
if (!mod)
{
TRACE( "loading %s\n", debugstr_w(module) );
/* FIXME: the library will never be freed */
if (!(mod = LoadLibraryExW(module, NULL, LOAD_WITH_ALTERED_SEARCH_PATH))) return NULL;
}
return (char *)mod + (ULONG_PTR)proc;
}
/***********************************************************************
* HOOK_CallHooks
*/
LRESULT HOOK_CallHooks( INT id, INT code, WPARAM wparam, LPARAM lparam, BOOL unicode )
{
struct win_hook_params params;
params.id = id;
params.code = code;
params.wparam = wparam;
params.lparam = lparam;
params.next_unicode = unicode;
return NtUserCallOneParam( (UINT_PTR)&params, NtUserCallHooks );
}
/***********************************************************************
* SetWindowsHookA (USER32.@)
*/
HHOOK WINAPI SetWindowsHookA( INT id, HOOKPROC proc )
{
return SetWindowsHookExA( id, proc, 0, GetCurrentThreadId() );
}
/***********************************************************************
* SetWindowsHookW (USER32.@)
*/
HHOOK WINAPI SetWindowsHookW( INT id, HOOKPROC proc )
{
return SetWindowsHookExW( id, proc, 0, GetCurrentThreadId() );
}
/***********************************************************************
* SetWindowsHookExA (USER32.@)
*/
HHOOK WINAPI SetWindowsHookExA( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid )
{
return set_windows_hook( id, proc, inst, tid, TRUE );
}
/***********************************************************************
* SetWindowsHookExW (USER32.@)
*/
HHOOK WINAPI SetWindowsHookExW( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid )
{
return set_windows_hook( id, proc, inst, tid, FALSE );
}
/***********************************************************************
* UnhookWindowsHook (USER32.@)
*/
BOOL WINAPI UnhookWindowsHook( INT id, HOOKPROC proc )
{
return NtUserUnhookWindowsHook( id, proc );
}
/***********************************************************************
* CallMsgFilterA (USER32.@)
*/
BOOL WINAPI CallMsgFilterA( LPMSG msg, INT code )
{
if (HOOK_CallHooks( WH_SYSMSGFILTER, code, 0, (LPARAM)msg, FALSE )) return TRUE;
return HOOK_CallHooks( WH_MSGFILTER, code, 0, (LPARAM)msg, FALSE );
}
/***********************************************************************
* CallMsgFilterW (USER32.@)
*/
BOOL WINAPI CallMsgFilterW( LPMSG msg, INT code )
{
if (HOOK_CallHooks( WH_SYSMSGFILTER, code, 0, (LPARAM)msg, TRUE )) return TRUE;
return HOOK_CallHooks( WH_MSGFILTER, code, 0, (LPARAM)msg, TRUE );
}
/***********************************************************************
* SetWinEventHook [USER32.@]
*
* Set up an event hook for a set of events.
*
* PARAMS
* event_min [I] Lowest event handled by pfnProc
* event_max [I] Highest event handled by pfnProc
* inst [I] DLL containing pfnProc
* proc [I] Callback event hook function
* pid [I] Process to get events from, or 0 for all processes
* tid [I] Thread to get events from, or 0 for all threads
* flags [I] Flags indicating the status of pfnProc
*
* RETURNS
* Success: A handle representing the hook.
* Failure: A NULL handle.
*/
HWINEVENTHOOK WINAPI SetWinEventHook(DWORD event_min, DWORD event_max,
HMODULE inst, WINEVENTPROC proc,
DWORD pid, DWORD tid, DWORD flags)
{
WCHAR module[MAX_PATH];
UNICODE_STRING str;
DWORD len = 0;
TRACE("%d,%d,%p,%p,%08x,%04x,%08x\n", event_min, event_max, inst,
proc, pid, tid, flags);
if (inst && (!(len = GetModuleFileNameW( inst, module, MAX_PATH )) || len >= MAX_PATH))
{
inst = 0;
len = 0;
}
str.Buffer = module;
str.Length = str.MaximumLength = len * sizeof(WCHAR);
return NtUserSetWinEventHook( event_min, event_max, inst, &str, proc, pid, tid, flags );
}
BOOL WINAPI User32CallWinEventHook( const struct win_event_hook_params *params, ULONG size )
{
WINEVENTPROC proc = params->proc;
HMODULE free_module = 0;
if (params->module[0] && !(proc = get_hook_proc( proc, params->module, &free_module ))) return FALSE;
TRACE_(relay)( "\1Call winevent hook proc %p (hhook=%p,event=%x,hwnd=%p,object_id=%x,child_id=%x,tid=%04x,time=%x)\n",
proc, params->handle, params->event, params->hwnd, params->object_id,
params->child_id, params->tid, params->time );
proc( params->handle, params->event, params->hwnd, params->object_id, params->child_id,
params->tid, params->time );
TRACE_(relay)( "\1Ret winevent hook proc %p (hhook=%p,event=%x,hwnd=%p,object_id=%x,child_id=%x,tid=%04x,time=%x)\n",
proc, params->handle, params->event, params->hwnd, params->object_id,
params->child_id, params->tid, params->time );
if (free_module) FreeLibrary( free_module );
return TRUE;
}
BOOL WINAPI User32CallWindowsHook( const struct win_hook_params *params, ULONG size )
{
HOOKPROC proc = params->proc;
HMODULE free_module = 0;
LRESULT ret;
if (params->module[0] && !(proc = get_hook_proc( proc, params->module, &free_module ))) return FALSE;
ret = call_hook_proc( proc, params->id, params->code, params->wparam, params->lparam,
params->prev_unicode, params->next_unicode );
if (free_module) FreeLibrary( free_module );
return ret;
}
/***********************************************************************
* IsWinEventHookInstalled [USER32.@]
*
* Determine if an event hook is installed for an event.
*
* PARAMS
* dwEvent [I] Id of the event
*
* RETURNS
* TRUE, If there are any hooks installed for the event.
* FALSE, Otherwise.
*
* BUGS
* Not implemented.
*/
BOOL WINAPI IsWinEventHookInstalled(DWORD dwEvent)
{
/* FIXME: Needed by Office 2007 installer */
WARN("(%d)-stub!\n", dwEvent);
return TRUE;
}
/* Undocumented RegisterUserApiHook() */
BOOL WINAPI RegisterUserApiHook(const struct user_api_hook *new_hook, struct user_api_hook *old_hook)
{
if (!new_hook)
return FALSE;
USER_Lock();
hooked_user_api = *new_hook;
user_api = &hooked_user_api;
if (old_hook)
*old_hook = original_user_api;
USER_Unlock();
return TRUE;
}
/* Undocumented UnregisterUserApiHook() */
void WINAPI UnregisterUserApiHook(void)
{
InterlockedExchangePointer((void **)&user_api, &original_user_api);
}
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