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user32: Pack the MDICREATESTRUCTW structure in messages to allow crossing 32/64 boundaries.

This commit is contained in:
Alexandre Julliard 2010-03-30 20:40:17 +02:00
parent 99719be4a6
commit 366c5ceea7
1 changed files with 73 additions and 21 deletions
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94
dlls/user32/message.c
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@ -195,6 +195,19 @@ struct packed_MDINEXTMENU
DWORD __pad3;
};
struct packed_MDICREATESTRUCTW
{
ULONGLONG szClass;
ULONGLONG szTitle;
ULONGLONG hOwner;
INT x;
INT y;
INT cx;
INT cy;
DWORD style;
ULONGLONG lParam;
};
/* the structures are unpacked on top of the packed ones, so make sure they fit */
C_ASSERT( sizeof(struct packed_CREATESTRUCTW) >= sizeof(CREATESTRUCTW) );
C_ASSERT( sizeof(struct packed_DRAWITEMSTRUCT) >= sizeof(DRAWITEMSTRUCT) );
@ -207,6 +220,7 @@ C_ASSERT( sizeof(struct packed_HELPINFO) >= sizeof(HELPINFO) );
C_ASSERT( sizeof(struct packed_NCCALCSIZE_PARAMS) >= sizeof(NCCALCSIZE_PARAMS) + sizeof(WINDOWPOS) );
C_ASSERT( sizeof(struct packed_MSG) >= sizeof(MSG) );
C_ASSERT( sizeof(struct packed_MDINEXTMENU) >= sizeof(MDINEXTMENU) );
C_ASSERT( sizeof(struct packed_MDICREATESTRUCTW) >= sizeof(MDICREATESTRUCTW) );
union packed_structs
{
@ -221,6 +235,7 @@ union packed_structs
struct packed_NCCALCSIZE_PARAMS ncp;
struct packed_MSG msg;
struct packed_MDINEXTMENU mnm;
struct packed_MDICREATESTRUCTW mcs;
};
/* description of the data fields that need to be packed along with a sent message */
@ -967,11 +982,20 @@ static size_t pack_message( HWND hwnd, UINT message, WPARAM wparam, LPARAM lpara
return sizeof(RECT);
case WM_MDICREATE:
{
MDICREATESTRUCTW *cs = (MDICREATESTRUCTW *)lparam;
push_data( data, cs, sizeof(*cs) );
if (!IS_INTRESOURCE(cs->szTitle)) push_string( data, cs->szTitle );
if (!IS_INTRESOURCE(cs->szClass)) push_string( data, cs->szClass );
return sizeof(*cs);
MDICREATESTRUCTW *mcs = (MDICREATESTRUCTW *)lparam;
data->ps.mcs.szClass = pack_ptr( mcs->szClass );
data->ps.mcs.szTitle = pack_ptr( mcs->szTitle );
data->ps.mcs.hOwner = pack_ptr( mcs->hOwner );
data->ps.mcs.x = mcs->x;
data->ps.mcs.y = mcs->y;
data->ps.mcs.cx = mcs->cx;
data->ps.mcs.cy = mcs->cy;
data->ps.mcs.style = mcs->style;
data->ps.mcs.lParam = mcs->lParam;
push_data( data, &data->ps.mcs, sizeof(data->ps.mcs) );
if (!IS_INTRESOURCE(mcs->szClass)) push_string( data, mcs->szClass );
if (!IS_INTRESOURCE(mcs->szTitle)) push_string( data, mcs->szTitle );
return sizeof(data->ps.mcs);
}
case WM_MDIGETACTIVE:
if (lparam) return sizeof(BOOL);
@ -1349,22 +1373,33 @@ static BOOL unpack_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM *lpa
break;
case WM_MDICREATE:
{
MDICREATESTRUCTW *cs = *buffer;
WCHAR *str = (WCHAR *)(cs + 1);
if (size < sizeof(*cs)) return FALSE;
size -= sizeof(*cs);
if (!IS_INTRESOURCE(cs->szTitle))
MDICREATESTRUCTW mcs;
WCHAR *str = (WCHAR *)(&ps->mcs + 1);
if (size < sizeof(ps->mcs)) return FALSE;
size -= sizeof(ps->mcs);
mcs.szClass = unpack_ptr( ps->mcs.szClass );
mcs.szTitle = unpack_ptr( ps->mcs.szTitle );
mcs.hOwner = unpack_ptr( ps->mcs.hOwner );
mcs.x = ps->mcs.x;
mcs.y = ps->mcs.y;
mcs.cx = ps->mcs.cx;
mcs.cy = ps->mcs.cy;
mcs.style = ps->mcs.style;
mcs.lParam = (LPARAM)unpack_ptr( ps->mcs.lParam );
if (ps->mcs.szClass >> 16)
{
if (!check_string( str, size )) return FALSE;
cs->szTitle = str;
mcs.szClass = str;
size -= (strlenW(str) + 1) * sizeof(WCHAR);
str += strlenW(str) + 1;
}
if (!IS_INTRESOURCE(cs->szClass))
if (ps->mcs.szTitle >> 16)
{
if (!check_string( str, size )) return FALSE;
cs->szClass = str;
mcs.szTitle = str;
}
memcpy( &ps->mcs, &mcs, sizeof(mcs) );
break;
}
case WM_MDIGETACTIVE:
@ -1571,8 +1606,20 @@ static void pack_reply( HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam,
break;
}
case WM_MDICREATE:
push_data( data, (MDICREATESTRUCTW *)lparam, sizeof(MDICREATESTRUCTW) );
{
MDICREATESTRUCTW *mcs = (MDICREATESTRUCTW *)lparam;
data->ps.mcs.szClass = pack_ptr( mcs->szClass );
data->ps.mcs.szTitle = pack_ptr( mcs->szTitle );
data->ps.mcs.hOwner = pack_ptr( mcs->hOwner );
data->ps.mcs.x = mcs->x;
data->ps.mcs.y = mcs->y;
data->ps.mcs.cx = mcs->cx;
data->ps.mcs.cy = mcs->cy;
data->ps.mcs.style = mcs->style;
data->ps.mcs.lParam = mcs->lParam;
push_data( data, &data->ps.mcs, sizeof(data->ps.mcs) );
break;
}
case WM_ASKCBFORMATNAME:
push_data( data, (WCHAR *)lparam, (strlenW((WCHAR *)lparam) + 1) * sizeof(WCHAR) );
break;
@ -1722,14 +1769,19 @@ static void unpack_reply( HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam,
if (lparam) memcpy( (DWORD *)lparam, buffer, min( sizeof(DWORD), size ));
break;
case WM_MDICREATE:
{
MDICREATESTRUCTW *cs = (MDICREATESTRUCTW *)lparam;
LPCWSTR title = cs->szTitle, class = cs->szClass;
memcpy( cs, buffer, min( sizeof(*cs), size ));
cs->szTitle = title; /* restore the original pointers */
cs->szClass = class;
if (size >= sizeof(ps->mcs))
{
MDICREATESTRUCTW *mcs = (MDICREATESTRUCTW *)lparam;
mcs->hOwner = unpack_ptr( ps->mcs.hOwner );
mcs->x = ps->mcs.x;
mcs->y = ps->mcs.y;
mcs->cx = ps->mcs.cx;
mcs->cy = ps->mcs.cy;
mcs->style = ps->mcs.style;
mcs->lParam = (LPARAM)unpack_ptr( ps->mcs.lParam );
/* don't allow changing class and title pointers */
}
break;
}
default:
ERR( "should not happen: unexpected message %x\n", message );
break;