programs/winedevice/device.c

   1 /*
   2  * Service process to load a kernel driver
   3  *
   4  * Copyright 2007 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #include "ntstatus.h"
  24 #define WIN32_NO_STATUS
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "winternl.h"
  28 #include "winreg.h"
  29 #include "winnls.h"
  30 #include "winsvc.h"
  31 #include "ddk/wdm.h"
  32 #include "wine/unicode.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(winedevice);
  36 WINE_DECLARE_DEBUG_CHANNEL(relay);
  37
  38 extern NTSTATUS wine_ntoskrnl_main_loop( HANDLE stop_event );
  39
  40 static WCHAR *driver_name;
  41 static SERVICE_STATUS_HANDLE service_handle;
  42 static HKEY driver_hkey;
  43 static HANDLE stop_event;
  44 static DRIVER_OBJECT driver_obj;
  45 static DRIVER_EXTENSION driver_extension;
  46
  47 /* find the LDR_MODULE corresponding to the driver module */
  48 static LDR_MODULE *find_ldr_module( HMODULE module )
  49 {
  50     LIST_ENTRY *entry, *list = &NtCurrentTeb()->Peb->LdrData->InMemoryOrderModuleList;
  51
  52     for (entry = list->Flink; entry != list; entry = entry->Flink)
  53     {
  54         LDR_MODULE *ldr = CONTAINING_RECORD(entry, LDR_MODULE, InMemoryOrderModuleList);
  55         if (ldr->BaseAddress == module) return ldr;
  56         if (ldr->BaseAddress > (void *)module) break;
  57     }
  58     return NULL;
  59 }
  60
  61 /* call the driver init entry point */
  62 static NTSTATUS init_driver( HMODULE module, UNICODE_STRING *keyname )
  63 {
  64     unsigned int i;
  65     NTSTATUS status;
  66     const IMAGE_NT_HEADERS *nt = RtlImageNtHeader( module );
  67
  68     if (!nt->OptionalHeader.AddressOfEntryPoint) return STATUS_SUCCESS;
  69
  70     driver_obj.Size            = sizeof(driver_obj);
  71     driver_obj.DriverSection   = find_ldr_module( module );
  72     driver_obj.DriverInit      = (PDRIVER_INITIALIZE)((char *)module + nt->OptionalHeader.AddressOfEntryPoint);
  73     driver_obj.DriverExtension = &driver_extension;
  74
  75     driver_extension.DriverObject   = &driver_obj;
  76     driver_extension.ServiceKeyName = *keyname;
  77
  78     if (WINE_TRACE_ON(relay))
  79         WINE_DPRINTF( "%04x:Call driver init %p (obj=%p,str=%s)\n", GetCurrentThreadId(),
  80                       driver_obj.DriverInit, &driver_obj, wine_dbgstr_w(keyname->Buffer) );
  81
  82     status = driver_obj.DriverInit( &driver_obj, keyname );
  83
  84     if (WINE_TRACE_ON(relay))
  85         WINE_DPRINTF( "%04x:Ret  driver init %p (obj=%p,str=%s) retval=%08x\n", GetCurrentThreadId(),
  86                       driver_obj.DriverInit, &driver_obj, wine_dbgstr_w(keyname->Buffer), status );
  87
  88     WINE_TRACE( "init done for %s obj %p\n", wine_dbgstr_w(driver_name), &driver_obj );
  89     WINE_TRACE( "- DriverInit = %p\n", driver_obj.DriverInit );
  90     WINE_TRACE( "- DriverStartIo = %p\n", driver_obj.DriverStartIo );
  91     WINE_TRACE( "- DriverUnload = %p\n", driver_obj.DriverUnload );
  92     for (i = 0; i <= IRP_MJ_MAXIMUM_FUNCTION; i++)
  93         WINE_TRACE( "- MajorFunction[%d] = %p\n", i, driver_obj.MajorFunction[i] );
  94
  95     return status;
  96 }
  97
  98 /* load the .sys module for a device driver */
  99 static BOOL load_driver(void)
 100 {
 101     static const WCHAR ntprefixW[] = {'\\','?','?','\\',0};
 102     static const WCHAR ImagePathW[] = {'I','m','a','g','e','P','a','t','h',0};
 103     static const WCHAR servicesW[] = {'\\','R','e','g','i','s','t','r','y',
 104                                       '\\','M','a','c','h','i','n','e',
 105                                       '\\','S','y','s','t','e','m',
 106                                       '\\','C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t',
 107                                       '\\','S','e','r','v','i','c','e','s','\\',0};
 108
 109     UNICODE_STRING keypath;
 110     HMODULE module;
 111     LPWSTR path = NULL, str;
 112     DWORD type, size;
 113
 114     str = HeapAlloc( GetProcessHeap(), 0, sizeof(servicesW) + strlenW(driver_name)*sizeof(WCHAR) );
 115     lstrcpyW( str, servicesW );
 116     lstrcatW( str, driver_name );
 117
 118     if (RegOpenKeyW( HKEY_LOCAL_MACHINE, str + 18 /* skip \registry\machine */, &driver_hkey ))
 119     {
 120         WINE_ERR( "cannot open key %s, err=%u\n", wine_dbgstr_w(str), GetLastError() );
 121         return FALSE;
 122     }
 123     RtlInitUnicodeString( &keypath, str );
 124
 125     /* read the executable path from memory */
 126     size = 0;
 127     if (RegQueryValueExW( driver_hkey, ImagePathW, NULL, &type, NULL, &size )) return FALSE;
 128
 129     str = HeapAlloc( GetProcessHeap(), 0, size );
 130     if (!RegQueryValueExW( driver_hkey, ImagePathW, NULL, &type, (LPBYTE)str, &size ))
 131     {
 132         size = ExpandEnvironmentStringsW(str,NULL,0);
 133         path = HeapAlloc(GetProcessHeap(),0,size*sizeof(WCHAR));
 134         ExpandEnvironmentStringsW(str,path,size);
 135     }
 136     HeapFree( GetProcessHeap(), 0, str );
 137     if (!path) return FALSE;
 138
 139     /* make sure msvcrt is loaded to resolve the ntoskrnl.exe forwards */
 140     LoadLibraryA( "msvcrt.dll" );
 141
 142     /* GameGuard uses an NT-style path name */
 143     str = path;
 144     if (!strncmpW( path, ntprefixW, 4 )) str += 4;
 145
 146     WINE_TRACE( "loading driver %s\n", wine_dbgstr_w(str) );
 147
 148     module = LoadLibraryW( str );
 149     HeapFree( GetProcessHeap(), 0, path );
 150     if (!module) return FALSE;
 151
 152     init_driver( module, &keypath );
 153     return TRUE;
 154 }
 155
 156 static DWORD WINAPI service_handler( DWORD ctrl, DWORD event_type, LPVOID event_data, LPVOID context )
 157 {
 158     SERVICE_STATUS status;
 159
 160     status.dwServiceType             = SERVICE_WIN32;
 161     status.dwControlsAccepted        = SERVICE_ACCEPT_STOP;
 162     status.dwWin32ExitCode           = 0;
 163     status.dwServiceSpecificExitCode = 0;
 164     status.dwCheckPoint              = 0;
 165     status.dwWaitHint                = 0;
 166
 167     switch(ctrl)
 168     {
 169     case SERVICE_CONTROL_STOP:
 170     case SERVICE_CONTROL_SHUTDOWN:
 171         WINE_TRACE( "shutting down %s\n", wine_dbgstr_w(driver_name) );
 172         status.dwCurrentState     = SERVICE_STOP_PENDING;
 173         status.dwControlsAccepted = 0;
 174         SetServiceStatus( service_handle, &status );
 175         SetEvent( stop_event );
 176         return NO_ERROR;
 177     default:
 178         WINE_FIXME( "got service ctrl %x for %s\n", ctrl, wine_dbgstr_w(driver_name) );
 179         status.dwCurrentState = SERVICE_RUNNING;
 180         SetServiceStatus( service_handle, &status );
 181         return NO_ERROR;
 182     }
 183 }
 184
 185 static void WINAPI ServiceMain( DWORD argc, LPWSTR *argv )
 186 {
 187     SERVICE_STATUS status;
 188
 189     WINE_TRACE( "starting service %s\n", wine_dbgstr_w(driver_name) );
 190
 191     stop_event = CreateEventW( NULL, TRUE, FALSE, NULL );
 192
 193     service_handle = RegisterServiceCtrlHandlerExW( driver_name, service_handler, NULL );
 194
 195     status.dwServiceType             = SERVICE_WIN32;
 196     status.dwCurrentState            = SERVICE_START_PENDING;
 197     status.dwControlsAccepted        = 0;
 198     status.dwWin32ExitCode           = 0;
 199     status.dwServiceSpecificExitCode = 0;
 200     status.dwCheckPoint              = 0;
 201     status.dwWaitHint                = 10000;
 202     SetServiceStatus( service_handle, &status );
 203
 204     if (load_driver())
 205     {
 206         status.dwCurrentState     = SERVICE_RUNNING;
 207         status.dwControlsAccepted = SERVICE_ACCEPT_STOP;
 208         SetServiceStatus( service_handle, &status );
 209
 210         wine_ntoskrnl_main_loop( stop_event );
 211     }
 212     else WINE_ERR( "driver %s failed to load\n", wine_dbgstr_w(driver_name) );
 213
 214     status.dwCurrentState     = SERVICE_STOPPED;
 215     status.dwControlsAccepted = 0;
 216     SetServiceStatus( service_handle, &status );
 217     WINE_TRACE( "service %s stopped\n", wine_dbgstr_w(driver_name) );
 218 }
 219
 220 int wmain( int argc, WCHAR *argv[] )
 221 {
 222     SERVICE_TABLE_ENTRYW service_table[2];
 223
 224     if (!(driver_name = argv[1]))
 225     {
 226         WINE_ERR( "missing device name, winedevice isn't supposed to be run manually\n" );
 227         return 1;
 228     }
 229
 230     service_table[0].lpServiceName = argv[1];
 231     service_table[0].lpServiceProc = ServiceMain;
 232     service_table[1].lpServiceName = NULL;
 233     service_table[1].lpServiceProc = NULL;
 234
 235     StartServiceCtrlDispatcherW( service_table );
 236     return 0;
 237 }