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