reactos/drivers/network/afd/afd/main.c

   1 /* $Id$
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * FILE:             drivers/net/afd/afd/main.c
   5  * PURPOSE:          Ancillary functions driver
   6  * PROGRAMMER:       Art Yerkes (ayerkes@speakeasy.net)
   7  * UPDATE HISTORY:
   8  * 20040630 Created
   9  *
  10  * Suggestions: Uniform naming (AfdXxx)
  11  */
  12
  13 /* INCLUDES */
  14
  15 #include "afd.h"
  16 #include "tdi_proto.h"
  17 #include "tdiconn.h"
  18 #include "debug.h"
  19
  20 #ifdef DBG
  21
  22 /* See debug.h for debug/trace constants */
  23 //DWORD DebugTraceLevel = DEBUG_ULTRA;
  24 DWORD DebugTraceLevel = 0;
  25
  26 #endif /* DBG */
  27
  28 void OskitDumpBuffer( PCHAR Data, UINT Len ) {
  29     unsigned int i;
  30
  31     for( i = 0; i < Len; i++ ) {
  32         if( i && !(i & 0xf) ) DbgPrint( "\n" );
  33         if( !(i & 0xf) ) DbgPrint( "%08x: ", (UINT_PTR)(Data + i) );
  34         DbgPrint( " %02x", Data[i] & 0xff );
  35     }
  36     DbgPrint("\n");
  37 }
  38
  39 /* FUNCTIONS */
  40
  41 NTSTATUS NTAPI
  42 DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath);
  43
  44 static NTSTATUS NTAPI
  45 AfdCreateSocket(PDEVICE_OBJECT DeviceObject, PIRP Irp,
  46                 PIO_STACK_LOCATION IrpSp) {
  47     PAFD_FCB FCB;
  48     PFILE_OBJECT FileObject;
  49     PAFD_DEVICE_EXTENSION DeviceExt;
  50     PFILE_FULL_EA_INFORMATION EaInfo;
  51     PAFD_CREATE_PACKET ConnectInfo = NULL;
  52     ULONG EaLength;
  53     PWCHAR EaInfoValue = NULL;
  54     UINT Disposition, i;
  55     NTSTATUS Status = STATUS_SUCCESS;
  56
  57     AFD_DbgPrint(MID_TRACE,
  58                  ("AfdCreate(DeviceObject %p Irp %p)\n", DeviceObject, Irp));
  59
  60     DeviceExt = DeviceObject->DeviceExtension;
  61     FileObject = IrpSp->FileObject;
  62     Disposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;
  63
  64     Irp->IoStatus.Information = 0;
  65
  66     EaInfo = Irp->AssociatedIrp.SystemBuffer;
  67
  68     if( EaInfo ) {
  69         ConnectInfo = (PAFD_CREATE_PACKET)(EaInfo->EaName + EaInfo->EaNameLength + 1);
  70         EaInfoValue = (PWCHAR)(((PCHAR)ConnectInfo) + sizeof(AFD_CREATE_PACKET));
  71
  72         EaLength = sizeof(FILE_FULL_EA_INFORMATION) +
  73             EaInfo->EaNameLength +
  74             EaInfo->EaValueLength;
  75
  76         AFD_DbgPrint(MID_TRACE,("EaInfo: %x, EaInfoValue: %x\n",
  77                                 EaInfo, EaInfoValue));
  78     }
  79
  80     AFD_DbgPrint(MID_TRACE,("About to allocate the new FCB\n"));
  81
  82     FCB = ExAllocatePool(NonPagedPool, sizeof(AFD_FCB));
  83     if( FCB == NULL ) {
  84         Irp->IoStatus.Status = STATUS_NO_MEMORY;
  85         IoCompleteRequest(Irp, IO_NO_INCREMENT);
  86         return STATUS_NO_MEMORY;
  87     }
  88
  89     AFD_DbgPrint(MID_TRACE,("Initializing the new FCB @ %x (FileObject %x Flags %x)\n", FCB, FileObject, ConnectInfo ? ConnectInfo->EndpointFlags : 0));
  90
  91     RtlZeroMemory( FCB, sizeof( *FCB ) );
  92
  93     FCB->Flags = ConnectInfo ? ConnectInfo->EndpointFlags : 0;
  94     FCB->State = SOCKET_STATE_CREATED;
  95     FCB->FileObject = FileObject;
  96     FCB->DeviceExt = DeviceExt;
  97     FCB->Recv.Size = DEFAULT_RECEIVE_WINDOW_SIZE;
  98     FCB->Send.Size = DEFAULT_SEND_WINDOW_SIZE;
  99
 100     KeInitializeSpinLock( &FCB->SpinLock );
 101     ExInitializeFastMutex( &FCB->Mutex );
 102     KeInitializeEvent( &FCB->StateLockedEvent, NotificationEvent, FALSE );
 103
 104     for( i = 0; i < MAX_FUNCTIONS; i++ ) {
 105         InitializeListHead( &FCB->PendingIrpList[i] );
 106     }
 107
 108     InitializeListHead( &FCB->DatagramList );
 109     InitializeListHead( &FCB->PendingConnections );
 110
 111     AFD_DbgPrint(MID_TRACE,("%x: Checking command channel\n", FCB));
 112
 113     if( ConnectInfo ) {
 114         FCB->TdiDeviceName.Length = ConnectInfo->SizeOfTransportName;
 115         FCB->TdiDeviceName.MaximumLength = FCB->TdiDeviceName.Length;
 116         FCB->TdiDeviceName.Buffer =
 117             ExAllocatePool( NonPagedPool, FCB->TdiDeviceName.Length );
 118
 119         if( !FCB->TdiDeviceName.Buffer ) {
 120             ExFreePool(FCB);
 121             AFD_DbgPrint(MID_TRACE,("Could not copy target string\n"));
 122             Irp->IoStatus.Status = STATUS_NO_MEMORY;
 123             IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
 124             return STATUS_NO_MEMORY;
 125         }
 126
 127         RtlCopyMemory( FCB->TdiDeviceName.Buffer,
 128                        ConnectInfo->TransportName,
 129                        FCB->TdiDeviceName.Length );
 130
 131         AFD_DbgPrint(MID_TRACE,("Success: %s %wZ\n",
 132                                 EaInfo->EaName, &FCB->TdiDeviceName));
 133     } else {
 134         AFD_DbgPrint(MID_TRACE,("Success: Control connection\n"));
 135     }
 136
 137     FileObject->FsContext = FCB;
 138
 139     /* It seems that UDP sockets are writable from inception */
 140     if( FCB->Flags & SGID_CONNECTIONLESS ) {
 141         AFD_DbgPrint(MID_TRACE,("Packet oriented socket\n"));
 142         /* Allocate our backup buffer */
 143         FCB->Recv.Window = ExAllocatePool( NonPagedPool, FCB->Recv.Size );
 144         if( !FCB->Recv.Window ) Status = STATUS_NO_MEMORY;
 145         FCB->Send.Window = ExAllocatePool( NonPagedPool, FCB->Send.Size );
 146         if( !FCB->Send.Window ) {
 147             if( FCB->Recv.Window ) ExFreePool( FCB->Recv.Window );
 148             Status = STATUS_NO_MEMORY;
 149         }
 150         /* A datagram socket is always sendable */
 151         FCB->PollState |= AFD_EVENT_SEND;
 152         PollReeval( FCB->DeviceExt, FCB->FileObject );
 153     }
 154
 155     if( !NT_SUCCESS(Status) ) {
 156         if( FCB->TdiDeviceName.Buffer ) ExFreePool( FCB->TdiDeviceName.Buffer );
 157         ExFreePool( FCB );
 158         FileObject->FsContext = NULL;
 159     }
 160
 161     Irp->IoStatus.Status = Status;
 162     IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
 163
 164     return Status;
 165 }
 166
 167 VOID DestroySocket( PAFD_FCB FCB ) {
 168     UINT i;
 169     BOOLEAN ReturnEarly = FALSE;
 170     PAFD_IN_FLIGHT_REQUEST InFlightRequest[IN_FLIGHT_REQUESTS];
 171
 172     AFD_DbgPrint(MIN_TRACE,("Called (%x)\n", FCB));
 173
 174     if( !SocketAcquireStateLock( FCB ) ) return;
 175
 176     FCB->State = SOCKET_STATE_CLOSED;
 177
 178     InFlightRequest[0] = &FCB->ListenIrp;
 179     InFlightRequest[1] = &FCB->ReceiveIrp;
 180     InFlightRequest[2] = &FCB->SendIrp;
 181     InFlightRequest[3] = &FCB->ConnectIrp;
 182
 183     /* Return early here because we might be called in the mean time. */
 184     if( FCB->Critical ||
 185         FCB->ListenIrp.InFlightRequest ||
 186         FCB->ReceiveIrp.InFlightRequest ||
 187         FCB->SendIrp.InFlightRequest ||
 188         FCB->ConnectIrp.InFlightRequest ) {
 189         AFD_DbgPrint(MIN_TRACE,("Leaving socket alive (%x %x %x %x)\n",
 190                                 FCB->ListenIrp.InFlightRequest,
 191                                 FCB->ReceiveIrp.InFlightRequest,
 192                                 FCB->SendIrp.InFlightRequest,
 193                                 FCB->ConnectIrp.InFlightRequest));
 194         ReturnEarly = TRUE;
 195     }
 196
 197     /* After PoolReeval, this FCB should not be involved in any outstanding
 198      * poll requests */
 199
 200     /* Cancel our pending requests */
 201     for( i = 0; i < IN_FLIGHT_REQUESTS; i++ ) {
 202         if( InFlightRequest[i]->InFlightRequest ) {
 203             AFD_DbgPrint(MID_TRACE,("Cancelling in flight irp %d (%x)\n",
 204                                     i, InFlightRequest[i]->InFlightRequest));
 205             IoCancelIrp(InFlightRequest[i]->InFlightRequest);
 206             InFlightRequest[i]->InFlightRequest = NULL;
 207         }
 208     }
 209
 210     SocketStateUnlock( FCB );
 211
 212     if( ReturnEarly ) return;
 213
 214     if( FCB->Recv.Window )
 215         ExFreePool( FCB->Recv.Window );
 216     if( FCB->Send.Window )
 217         ExFreePool( FCB->Send.Window );
 218     if( FCB->AddressFrom )
 219         ExFreePool( FCB->AddressFrom );
 220     if( FCB->LocalAddress )
 221         ExFreePool( FCB->LocalAddress );
 222     if( FCB->RemoteAddress )
 223         ExFreePool( FCB->RemoteAddress );
 224     if( FCB->TdiDeviceName.Buffer )
 225         ExFreePool(FCB->TdiDeviceName.Buffer);
 226
 227         if (FCB->Connection.Object)
 228         {
 229                 NtClose(FCB->Connection.Handle);
 230                 ObDereferenceObject(FCB->Connection.Object);
 231         }
 232         if (FCB->AddressFile.Object)
 233         {
 234                 NtClose(FCB->AddressFile.Handle);
 235                 ObDereferenceObject(FCB->AddressFile.Object);
 236         }
 237
 238     ExFreePool(FCB);
 239     AFD_DbgPrint(MIN_TRACE,("Deleted (%x)\n", FCB));
 240
 241     AFD_DbgPrint(MIN_TRACE,("Leaving\n"));
 242 }
 243
 244 static NTSTATUS NTAPI
 245 AfdCloseSocket(PDEVICE_OBJECT DeviceObject, PIRP Irp,
 246                PIO_STACK_LOCATION IrpSp)
 247 {
 248     PFILE_OBJECT FileObject = IrpSp->FileObject;
 249     PAFD_FCB FCB = FileObject->FsContext;
 250
 251     AFD_DbgPrint(MID_TRACE,
 252                  ("AfdClose(DeviceObject %p Irp %p)\n", DeviceObject, Irp));
 253
 254     AFD_DbgPrint(MID_TRACE,("FCB %x\n", FCB));
 255
 256     FCB->PollState |= AFD_EVENT_CLOSE;
 257     PollReeval( FCB->DeviceExt, FileObject );
 258     KillSelectsForFCB( FCB->DeviceExt, FileObject, FALSE );
 259
 260     if( FCB->EventSelect ) ObDereferenceObject( FCB->EventSelect );
 261
 262     FileObject->FsContext = NULL;
 263     DestroySocket( FCB );
 264
 265     Irp->IoStatus.Status = STATUS_SUCCESS;
 266     Irp->IoStatus.Information = 0;
 267     IoCompleteRequest(Irp, IO_NO_INCREMENT);
 268
 269     AFD_DbgPrint(MID_TRACE, ("Returning success.\n"));
 270
 271     return STATUS_SUCCESS;
 272 }
 273
 274 static NTSTATUS NTAPI
 275 AfdDisconnect(PDEVICE_OBJECT DeviceObject, PIRP Irp,
 276               PIO_STACK_LOCATION IrpSp) {
 277     PFILE_OBJECT FileObject = IrpSp->FileObject;
 278     PAFD_FCB FCB = FileObject->FsContext;
 279     PAFD_DISCONNECT_INFO DisReq;
 280     IO_STATUS_BLOCK Iosb;
 281     PTDI_CONNECTION_INFORMATION ConnInfo;
 282     NTSTATUS Status;
 283     USHORT Flags = 0;
 284
 285     if( !SocketAcquireStateLock( FCB ) ) return LostSocket( Irp );
 286
 287     if( !(DisReq = LockRequest( Irp, IrpSp )) )
 288         return UnlockAndMaybeComplete( FCB, STATUS_NO_MEMORY,
 289                                        Irp, 0, NULL );
 290
 291     if (NULL == FCB->RemoteAddress)
 292       {
 293         ConnInfo = NULL;
 294       }
 295     else
 296       {
 297         Status = TdiBuildNullConnectionInfo
 298             ( &ConnInfo, FCB->RemoteAddress->Address[0].AddressType );
 299
 300         if( !NT_SUCCESS(Status) || !ConnInfo )
 301             return UnlockAndMaybeComplete( FCB, STATUS_NO_MEMORY,
 302                                            Irp, 0, NULL );
 303       }
 304
 305     if( DisReq->DisconnectType & AFD_DISCONNECT_SEND )
 306         Flags |= TDI_DISCONNECT_RELEASE;
 307     if( DisReq->DisconnectType & AFD_DISCONNECT_RECV ||
 308         DisReq->DisconnectType & AFD_DISCONNECT_ABORT )
 309         Flags |= TDI_DISCONNECT_ABORT;
 310
 311     Status = TdiDisconnect( FCB->Connection.Object,
 312                             &DisReq->Timeout,
 313                             Flags,
 314                             &Iosb,
 315                             NULL,
 316                             NULL,
 317                             FCB->AddressFrom,
 318                             ConnInfo);
 319
 320     if (ConnInfo) ExFreePool( ConnInfo );
 321
 322     return UnlockAndMaybeComplete( FCB, Status, Irp, 0, NULL );
 323 }
 324
 325 static NTSTATUS NTAPI
 326 AfdDispatch(PDEVICE_OBJECT DeviceObject, PIRP Irp)
 327 {
 328     PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
 329     NTSTATUS Status = STATUS_SUCCESS;
 330 #ifdef DBG
 331     PFILE_OBJECT FileObject = IrpSp->FileObject;
 332 #endif
 333
 334     AFD_DbgPrint(MID_TRACE,("AfdDispatch: %d\n", IrpSp->MajorFunction));
 335     if( IrpSp->MajorFunction != IRP_MJ_CREATE) {
 336         AFD_DbgPrint(MID_TRACE,("FO %x, IrpSp->FO %x\n",
 337                                 FileObject, IrpSp->FileObject));
 338         ASSERT(FileObject == IrpSp->FileObject);
 339     }
 340
 341     Irp->IoStatus.Information = 0;
 342
 343     switch(IrpSp->MajorFunction)
 344     {
 345         /* opening and closing handles to the device */
 346     case IRP_MJ_CREATE:
 347         /* Mostly borrowed from the named pipe file system */
 348         return AfdCreateSocket(DeviceObject, Irp, IrpSp);
 349
 350     case IRP_MJ_CLOSE:
 351         /* Ditto the borrowing */
 352         return AfdCloseSocket(DeviceObject, Irp, IrpSp);
 353
 354     /* write data */
 355     case IRP_MJ_WRITE:
 356         return AfdConnectedSocketWriteData( DeviceObject, Irp, IrpSp, TRUE );
 357
 358     /* read data */
 359     case IRP_MJ_READ:
 360         return AfdConnectedSocketReadData( DeviceObject, Irp, IrpSp, TRUE );
 361
 362     case IRP_MJ_DEVICE_CONTROL:
 363     {
 364         switch( IrpSp->Parameters.DeviceIoControl.IoControlCode ) {
 365         case IOCTL_AFD_BIND:
 366             return AfdBindSocket( DeviceObject, Irp, IrpSp );
 367
 368         case IOCTL_AFD_CONNECT:
 369             return AfdStreamSocketConnect( DeviceObject, Irp, IrpSp );
 370
 371         case IOCTL_AFD_START_LISTEN:
 372             return AfdListenSocket( DeviceObject, Irp, IrpSp );
 373
 374         case IOCTL_AFD_RECV:
 375             return AfdConnectedSocketReadData( DeviceObject, Irp, IrpSp,
 376                                                FALSE );
 377
 378         case IOCTL_AFD_SELECT:
 379             return AfdSelect( DeviceObject, Irp, IrpSp );
 380
 381         case IOCTL_AFD_EVENT_SELECT:
 382             return AfdEventSelect( DeviceObject, Irp, IrpSp );
 383
 384         case IOCTL_AFD_ENUM_NETWORK_EVENTS:
 385             return AfdEnumEvents( DeviceObject, Irp, IrpSp );
 386
 387         case IOCTL_AFD_RECV_DATAGRAM:
 388             return AfdPacketSocketReadData( DeviceObject, Irp, IrpSp );
 389
 390         case IOCTL_AFD_SEND:
 391             return AfdConnectedSocketWriteData( DeviceObject, Irp, IrpSp,
 392                                                 FALSE );
 393
 394         case IOCTL_AFD_SEND_DATAGRAM:
 395             return AfdPacketSocketWriteData( DeviceObject, Irp, IrpSp );
 396
 397         case IOCTL_AFD_GET_INFO:
 398             return AfdGetInfo( DeviceObject, Irp, IrpSp );
 399
 400         case IOCTL_AFD_GET_CONTEXT:
 401             return AfdGetContext( DeviceObject, Irp, IrpSp );
 402
 403         case IOCTL_AFD_SET_CONTEXT:
 404             return AfdSetContext( DeviceObject, Irp, IrpSp );
 405
 406         case IOCTL_AFD_WAIT_FOR_LISTEN:
 407             return AfdWaitForListen( DeviceObject, Irp, IrpSp );
 408
 409         case IOCTL_AFD_ACCEPT:
 410             return AfdAccept( DeviceObject, Irp, IrpSp );
 411
 412         case IOCTL_AFD_DISCONNECT:
 413             return AfdDisconnect( DeviceObject, Irp, IrpSp );
 414
 415         case IOCTL_AFD_GET_SOCK_NAME:
 416             return AfdGetSockName( DeviceObject, Irp, IrpSp );
 417
 418         case IOCTL_AFD_GET_PEER_NAME:
 419             return AfdGetPeerName( DeviceObject, Irp, IrpSp );
 420
 421         case IOCTL_AFD_GET_TDI_HANDLES:
 422             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_TDI_HANDLES\n"));
 423             break;
 424
 425         case IOCTL_AFD_SET_INFO:
 426             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_INFO\n"));
 427             break;
 428
 429         case IOCTL_AFD_SET_CONNECT_DATA:
 430             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_CONNECT_DATA\n"));
 431             break;
 432
 433         case IOCTL_AFD_SET_CONNECT_OPTIONS:
 434             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_CONNECT_OPTIONS\n"));
 435             break;
 436
 437         case IOCTL_AFD_SET_DISCONNECT_DATA:
 438             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_DISCONNECT_DATA\n"));
 439             break;
 440
 441         case IOCTL_AFD_SET_DISCONNECT_OPTIONS:
 442             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_DISCONNECT_OPTIONS\n"));
 443             break;
 444
 445         case IOCTL_AFD_GET_CONNECT_DATA:
 446             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_CONNECT_DATA\n"));
 447             break;
 448
 449         case IOCTL_AFD_GET_CONNECT_OPTIONS:
 450             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_CONNECT_OPTIONS\n"));
 451             break;
 452
 453         case IOCTL_AFD_GET_DISCONNECT_DATA:
 454             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_DISCONNECT_DATA\n"));
 455             break;
 456
 457         case IOCTL_AFD_GET_DISCONNECT_OPTIONS:
 458             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_DISCONNECT_OPTIONS\n"));
 459             break;
 460
 461         case IOCTL_AFD_SET_CONNECT_DATA_SIZE:
 462             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_CONNECT_DATA_SIZE\n"));
 463             break;
 464
 465         case IOCTL_AFD_SET_CONNECT_OPTIONS_SIZE:
 466             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_CONNECT_OPTIONS_SIZE\n"));
 467             break;
 468
 469         case IOCTL_AFD_SET_DISCONNECT_DATA_SIZE:
 470             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_DISCONNECT_DATA_SIZE\n"));
 471             break;
 472
 473         case IOCTL_AFD_SET_DISCONNECT_OPTIONS_SIZE:
 474             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_DISCONNECT_OPTIONS_SIZE\n"));
 475             break;
 476
 477         case IOCTL_AFD_DEFER_ACCEPT:
 478             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_DEFER_ACCEPT\n"));
 479             break;
 480
 481         case IOCTL_AFD_GET_PENDING_CONNECT_DATA:
 482             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_PENDING_CONNECT_DATA\n"));
 483             break;
 484
 485         default:
 486             Status = STATUS_NOT_IMPLEMENTED;
 487             AFD_DbgPrint(MIN_TRACE, ("Unknown IOCTL (0x%x)\n",
 488                                      IrpSp->Parameters.DeviceIoControl.
 489                                      IoControlCode));
 490             break;
 491         }
 492         break;
 493     }
 494
 495 /* unsupported operations */
 496     default:
 497     {
 498         Status = STATUS_NOT_IMPLEMENTED;
 499         AFD_DbgPrint(MIN_TRACE,
 500                      ("Irp: Unknown Major code was %x\n",
 501                       IrpSp->MajorFunction));
 502         break;
 503     }
 504     }
 505
 506     AFD_DbgPrint(MID_TRACE, ("Returning %x\n", Status));
 507     Irp->IoStatus.Status = Status;
 508     IoCompleteRequest(Irp, IO_NO_INCREMENT);
 509
 510     return (Status);
 511 }
 512
 513 static VOID NTAPI
 514 AfdUnload(PDRIVER_OBJECT DriverObject)
 515 {
 516 }
 517
 518 NTSTATUS NTAPI
 519 DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
 520 {
 521     PDEVICE_OBJECT DeviceObject;
 522     UNICODE_STRING wstrDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Afd");
 523     PAFD_DEVICE_EXTENSION DeviceExt;
 524     NTSTATUS Status;
 525
 526     /* register driver routines */
 527     DriverObject->MajorFunction[IRP_MJ_CLOSE] = AfdDispatch;
 528     DriverObject->MajorFunction[IRP_MJ_CREATE] = AfdDispatch;
 529     DriverObject->MajorFunction[IRP_MJ_WRITE] = AfdDispatch;
 530     DriverObject->MajorFunction[IRP_MJ_READ] = AfdDispatch;
 531     DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = AfdDispatch;
 532     DriverObject->DriverUnload = AfdUnload;
 533
 534     Status = IoCreateDevice
 535         ( DriverObject,
 536           sizeof(AFD_DEVICE_EXTENSION),
 537           &wstrDeviceName,
 538           FILE_DEVICE_NAMED_PIPE,
 539           0,
 540           FALSE,
 541           &DeviceObject );
 542
 543     /* failure */
 544     if(!NT_SUCCESS(Status))
 545     {
 546         return (Status);
 547     }
 548
 549     DeviceExt = DeviceObject->DeviceExtension;
 550     KeInitializeSpinLock( &DeviceExt->Lock );
 551     InitializeListHead( &DeviceExt->Polls );
 552
 553     AFD_DbgPrint(MID_TRACE,("Device created: object %x ext %x\n",
 554                             DeviceObject, DeviceExt));
 555
 556     return (Status);
 557 }
 558
 559 /* EOF */