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Sweden-Number/dlls/kernel32/vxd.c

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/*
* Win32 VxD functions
*
* Copyright 1998 Marcus Meissner
* Copyright 1998 Ulrich Weigand
* Copyright 1998 Patrik Stridvall
*
* 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
*/
#include "config.h"
#include "wine/port.h"
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#include <string.h>
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winternl.h"
#include "winioctl.h"
#include "kernel16_private.h"
#include "wine/library.h"
#include "wine/unicode.h"
#include "wine/server.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(vxd);
typedef DWORD (WINAPI *VxDCallProc)(DWORD, CONTEXT86 *);
typedef BOOL (WINAPI *DeviceIoProc)(DWORD, LPVOID, DWORD, LPVOID, DWORD, LPDWORD, LPOVERLAPPED);
struct vxd_module
{
LARGE_INTEGER index;
HANDLE handle;
HMODULE module;
DeviceIoProc proc;
};
struct vxdcall_service
{
WCHAR name[12];
DWORD service;
HMODULE module;
VxDCallProc proc;
};
#define MAX_VXD_MODULES 32
static struct vxd_module vxd_modules[MAX_VXD_MODULES];
static struct vxdcall_service vxd_services[] =
{
{ {'v','m','m','.','v','x','d',0}, 0x0001, NULL, NULL },
{ {'v','w','i','n','3','2','.','v','x','d',0}, 0x002a, NULL, NULL }
};
#define NB_VXD_SERVICES (sizeof(vxd_services)/sizeof(vxd_services[0]))
static CRITICAL_SECTION vxd_section;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &vxd_section,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": vxd_section") }
};
static CRITICAL_SECTION vxd_section = { &critsect_debug, -1, 0, 0, 0, 0 };
/* create a file handle to represent a VxD, by opening a dummy file in the wineserver directory */
static HANDLE open_vxd_handle( LPCWSTR name )
{
static const WCHAR prefixW[] = {'\\','?','?','\\','u','n','i','x'};
const char *dir = wine_get_server_dir();
int len;
HANDLE ret;
NTSTATUS status;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
IO_STATUS_BLOCK io;
len = MultiByteToWideChar( CP_UNIXCP, 0, dir, -1, NULL, 0 );
nameW.Length = sizeof(prefixW) + (len + strlenW( name )) * sizeof(WCHAR);
nameW.MaximumLength = nameW.Length + sizeof(WCHAR);
if (!(nameW.Buffer = HeapAlloc( GetProcessHeap(), 0, nameW.MaximumLength )))
{
SetLastError( ERROR_NOT_ENOUGH_MEMORY );
return 0;
}
memcpy( nameW.Buffer, prefixW, sizeof(prefixW) );
MultiByteToWideChar( CP_UNIXCP, 0, dir, -1, nameW.Buffer + sizeof(prefixW)/sizeof(WCHAR), len );
len += sizeof(prefixW) / sizeof(WCHAR);
nameW.Buffer[len-1] = '/';
strcpyW( nameW.Buffer + len, name );
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.Attributes = 0;
attr.ObjectName = &nameW;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
status = NtCreateFile( &ret, 0, &attr, &io, NULL, 0,
FILE_SHARE_READ|FILE_SHARE_WRITE, FILE_OPEN_IF,
FILE_SYNCHRONOUS_IO_ALERT, NULL, 0 );
if (status)
{
ret = 0;
SetLastError( RtlNtStatusToDosError(status) );
}
RtlFreeUnicodeString( &nameW );
return ret;
}
/* retrieve the DeviceIoControl function for a Vxd given a file handle */
DeviceIoProc VXD_get_proc( HANDLE handle )
{
DeviceIoProc ret = NULL;
int status, i;
IO_STATUS_BLOCK io;
FILE_INTERNAL_INFORMATION info;
status = NtQueryInformationFile( handle, &io, &info, sizeof(info), FileInternalInformation );
if (status)
{
SetLastError( RtlNtStatusToDosError(status) );
return NULL;
}
RtlEnterCriticalSection( &vxd_section );
for (i = 0; i < MAX_VXD_MODULES; i++)
{
if (!vxd_modules[i].module) break;
if (vxd_modules[i].index.QuadPart == info.IndexNumber.QuadPart)
{
if (!(ret = vxd_modules[i].proc)) SetLastError( ERROR_INVALID_FUNCTION );
goto done;
}
}
/* FIXME: Here we could go through the directory to find the VxD name and load it. */
/* Let's wait to find out if there are actually apps out there that try to share */
/* VxD handles between processes, before we go to the trouble of implementing it. */
ERR( "handle %p not found in module list, inherited from another process?\n", handle );
done:
RtlLeaveCriticalSection( &vxd_section );
return ret;
}
/* load a VxD and return a file handle to it */
HANDLE VXD_Open( LPCWSTR filenameW, DWORD access, SECURITY_ATTRIBUTES *sa )
{
static const WCHAR dotVxDW[] = {'.','v','x','d',0};
int i;
HANDLE handle;
HMODULE module;
WCHAR *p, name[16];
if (!(GetVersion() & 0x80000000)) /* there are no VxDs on NT */
{
SetLastError( ERROR_FILE_NOT_FOUND );
return 0;
}
/* normalize the filename */
if (strlenW( filenameW ) >= sizeof(name)/sizeof(WCHAR) - 4 ||
strchrW( filenameW, '/' ) || strchrW( filenameW, '\\' ))
{
SetLastError( ERROR_FILE_NOT_FOUND );
return 0;
}
strcpyW( name, filenameW );
strlwrW( name );
p = strchrW( name, '.' );
if (!p) strcatW( name, dotVxDW );
else if (strcmpiW( p, dotVxDW )) /* existing extension has to be .vxd */
{
SetLastError( ERROR_FILE_NOT_FOUND );
return 0;
}
/* try to load the module first */
if (!(module = LoadLibraryW( name )))
{
FIXME( "Unknown/unsupported VxD %s. Try setting Windows version to 'nt40' or 'win31'.\n",
debugstr_w(name) );
SetLastError( ERROR_FILE_NOT_FOUND );
return 0;
}
/* register the module in the global list if necessary */
RtlEnterCriticalSection( &vxd_section );
for (i = 0; i < MAX_VXD_MODULES; i++)
{
if (vxd_modules[i].module == module)
{
handle = vxd_modules[i].handle;
goto done; /* already registered */
}
if (!vxd_modules[i].module) /* new one, register it */
{
IO_STATUS_BLOCK io;
FILE_INTERNAL_INFORMATION info;
/* get a file handle to the dummy file */
if (!(handle = open_vxd_handle( name )))
{
FreeLibrary( module );
goto done;
}
if (!NtQueryInformationFile( handle, &io, &info, sizeof(info), FileInternalInformation ))
vxd_modules[i].index = info.IndexNumber;
vxd_modules[i].module = module;
vxd_modules[i].handle = handle;
vxd_modules[i].proc = (DeviceIoProc)GetProcAddress( module, "DeviceIoControl" );
goto done;
}
}
ERR("too many open VxD modules, please report\n" );
FreeLibrary( module );
handle = 0;
done:
RtlLeaveCriticalSection( &vxd_section );
if (!DuplicateHandle( GetCurrentProcess(), handle, GetCurrentProcess(), &handle, 0,
(sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle),
DUP_HANDLE_SAME_ACCESS ))
handle = 0;
return handle;
}
/***********************************************************************
* VxDCall0 (KERNEL32.1)
* VxDCall1 (KERNEL32.2)
* VxDCall2 (KERNEL32.3)
* VxDCall3 (KERNEL32.4)
* VxDCall4 (KERNEL32.5)
* VxDCall5 (KERNEL32.6)
* VxDCall6 (KERNEL32.7)
* VxDCall7 (KERNEL32.8)
* VxDCall8 (KERNEL32.9)
*/
void WINAPI __regs_VxDCall( DWORD service, CONTEXT86 *context )
{
unsigned int i;
VxDCallProc proc = NULL;
RtlEnterCriticalSection( &vxd_section );
for (i = 0; i < NB_VXD_SERVICES; i++)
{
if (HIWORD(service) != vxd_services[i].service) continue;
if (!vxd_services[i].module) /* need to load it */
{
if ((vxd_services[i].module = LoadLibraryW( vxd_services[i].name )))
vxd_services[i].proc = (VxDCallProc)GetProcAddress( vxd_services[i].module, "VxDCall" );
}
proc = vxd_services[i].proc;
break;
}
RtlLeaveCriticalSection( &vxd_section );
if (proc) context->Eax = proc( service, context );
else
{
FIXME( "Unknown/unimplemented VxD (%08x)\n", service);
context->Eax = 0xffffffff; /* FIXME */
}
}
#ifdef DEFINE_REGS_ENTRYPOINT
DEFINE_REGS_ENTRYPOINT( VxDCall, 1 )
#endif
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