main.c

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/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS TCP/IP protocol driver
 * FILE:        tcpip/main.c
 * PURPOSE:     Driver entry point
 * PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
 * REVISIONS:
 *   CSH 01/08-2000 Created
 */
#include "precomp.h"

PDEVICE_OBJECT TCPDeviceObject   = NULL;
PDEVICE_OBJECT UDPDeviceObject   = NULL;
PDEVICE_OBJECT IPDeviceObject    = NULL;
PDEVICE_OBJECT RawIPDeviceObject = NULL;
NDIS_HANDLE GlobalPacketPool     = NULL;
NDIS_HANDLE GlobalBufferPool     = NULL;
KSPIN_LOCK EntityListLock;
TDIEntityInfo *EntityList        = NULL;
ULONG EntityCount                = 0;
ULONG EntityMax                  = 0;
UDP_STATISTICS UDPStats;

/* Network timers */
KTIMER IPTimer;
KDPC IPTimeoutDpc;

VOID TiWriteErrorLog(
    PDRIVER_OBJECT DriverContext,
    NTSTATUS ErrorCode,
    ULONG UniqueErrorValue,
    NTSTATUS FinalStatus,
    PWSTR String,
    ULONG DumpDataCount,
    PULONG DumpData)
/*
 * FUNCTION: Writes an error log entry
 * ARGUMENTS:
 *     DriverContext    = Pointer to the driver or device object
 *     ErrorCode        = An error code to put in the log entry
 *     UniqueErrorValue = UniqueErrorValue in the error log packet
 *     FinalStatus      = FinalStatus in the error log packet
 *     String           = If not NULL, a pointer to a string to put in log
 *                        entry
 *     DumpDataCount    = Number of ULONGs of dump data
 *     DumpData         = Pointer to dump data for the log entry
 */
{
#if 0
    PIO_ERROR_LOG_PACKET LogEntry;
    UCHAR EntrySize;
    ULONG StringSize;
    PUCHAR pString;
    static WCHAR DriverName[] = L"TCP/IP";

    EntrySize = sizeof(IO_ERROR_LOG_PACKET) +
        (DumpDataCount * sizeof(ULONG)) + sizeof(DriverName);

    if (String) {
        StringSize = (wcslen(String) * sizeof(WCHAR)) + sizeof(UNICODE_NULL);
        EntrySize += (UCHAR)StringSize;
    }

    LogEntry = (PIO_ERROR_LOG_PACKET)IoAllocateErrorLogEntry(
        DriverContext, EntrySize);

    if (LogEntry) {
        LogEntry->MajorFunctionCode = -1;
        LogEntry->RetryCount        = -1;
        LogEntry->DumpDataSize      = (USHORT)(DumpDataCount * sizeof(ULONG));
        LogEntry->NumberOfStrings   = (String == NULL) ? 1 : 2;
        LogEntry->StringOffset      = sizeof(IO_ERROR_LOG_PACKET) + (DumpDataCount-1) * sizeof(ULONG);
        LogEntry->EventCategory     = 0;
        LogEntry->ErrorCode         = ErrorCode;
        LogEntry->UniqueErrorValue  = UniqueErrorValue;
        LogEntry->FinalStatus       = FinalStatus;
        LogEntry->SequenceNumber    = -1;
        LogEntry->IoControlCode     = 0;

        if (DumpDataCount)
            RtlCopyMemory(LogEntry->DumpData, DumpData, DumpDataCount * sizeof(ULONG));

        pString = ((PUCHAR)LogEntry) + LogEntry->StringOffset;
        RtlCopyMemory(pString, DriverName, sizeof(DriverName));
        pString += sizeof(DriverName);

        if (String)
            RtlCopyMemory(pString, String, StringSize);

        IoWriteErrorLogEntry(LogEntry);
    }
#endif
}

/*
 * FUNCTION: Creates a file object
 * ARGUMENTS:
 *     DeviceObject = Pointer to a device object for this driver
 *     Irp          = Pointer to a I/O request packet
 * RETURNS:
 *     Status of the operation
 */

NTSTATUS TiCreateFileObject(
  PDEVICE_OBJECT DeviceObject,
  PIRP Irp)
{
    PFILE_FULL_EA_INFORMATION EaInfo;
    PTRANSPORT_CONTEXT Context;
    PIO_STACK_LOCATION IrpSp;
    PTA_IP_ADDRESS Address;
    TDI_REQUEST Request;
    PVOID ClientContext;
    NTSTATUS Status;
    ULONG Protocol;

    TI_DbgPrint(DEBUG_IRP, ("Called. DeviceObject is at (0x%X), IRP is at (0x%X).\n", DeviceObject, Irp));

    EaInfo = Irp->AssociatedIrp.SystemBuffer;

    /* Parameter check */
    /* No EA information means that we're opening for SET/QUERY_INFORMATION
    * style calls. */

    /* Allocate resources here. We release them again if something failed */
    Context = ExAllocatePoolWithTag(NonPagedPool, sizeof(TRANSPORT_CONTEXT),
                                    TRANS_CONTEXT_TAG);
    if (!Context)
    {
        TI_DbgPrint(MIN_TRACE, ("Insufficient resources.\n"));
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    Context->CancelIrps = FALSE;

    IrpSp = IoGetCurrentIrpStackLocation(Irp);
    IrpSp->FileObject->FsContext = Context;
    Request.RequestContext       = Irp;

    /* Branch to the right handler */
    if (EaInfo &&
        (EaInfo->EaNameLength == TDI_TRANSPORT_ADDRESS_LENGTH) &&
        (RtlCompareMemory(&EaInfo->EaName, TdiTransportAddress,
        TDI_TRANSPORT_ADDRESS_LENGTH) == TDI_TRANSPORT_ADDRESS_LENGTH))
    {
        /* This is a request to open an address */


        /* XXX This should probably be done in IoCreateFile() */
        /* Parameter checks */

        Address = (PTA_IP_ADDRESS)(EaInfo->EaName + EaInfo->EaNameLength + 1); //0-term

        if ((EaInfo->EaValueLength < sizeof(TA_IP_ADDRESS)) ||
            (Address->TAAddressCount != 1) ||
            (Address->Address[0].AddressLength < TDI_ADDRESS_LENGTH_IP) ||
            (Address->Address[0].AddressType != TDI_ADDRESS_TYPE_IP))
        {
            TI_DbgPrint(MIN_TRACE, ("Parameters are invalid:\n"));
            TI_DbgPrint(MIN_TRACE, ("AddressCount: %d\n", Address->TAAddressCount));
            if( Address->TAAddressCount == 1 )
            {
                TI_DbgPrint(MIN_TRACE, ("AddressLength: %\n",
                            Address->Address[0].AddressLength));
                TI_DbgPrint(MIN_TRACE, ("AddressType: %\n",
                            Address->Address[0].AddressType));
            }

            ExFreePoolWithTag(Context, TRANS_CONTEXT_TAG);
            return STATUS_INVALID_PARAMETER;
        }

        /* Open address file object */

        /* Protocol depends on device object so find the protocol */
        if (DeviceObject == TCPDeviceObject)
            Protocol = IPPROTO_TCP;
        else if (DeviceObject == UDPDeviceObject)
            Protocol = IPPROTO_UDP;
        else if (DeviceObject == IPDeviceObject)
            Protocol = IPPROTO_RAW;
        else if (DeviceObject == RawIPDeviceObject)
        {
            Status = TiGetProtocolNumber(&IrpSp->FileObject->FileName, &Protocol);
            if (!NT_SUCCESS(Status))
            {
                TI_DbgPrint(MIN_TRACE, ("Raw IP protocol number is invalid.\n"));
                ExFreePoolWithTag(Context, TRANS_CONTEXT_TAG);
                return STATUS_INVALID_PARAMETER;
            }
        }
        else
        {
            TI_DbgPrint(MIN_TRACE, ("Invalid device object at (0x%X).\n", DeviceObject));
            ExFreePoolWithTag(Context, TRANS_CONTEXT_TAG);
            return STATUS_INVALID_PARAMETER;
        }

        Status = FileOpenAddress(&Request, Address, Protocol, NULL);
        if (NT_SUCCESS(Status))
        {
            IrpSp->FileObject->FsContext2 = (PVOID)TDI_TRANSPORT_ADDRESS_FILE;
            Context->Handle.AddressHandle = Request.Handle.AddressHandle;
        }

    }
    else if (EaInfo &&
            (EaInfo->EaNameLength == TDI_CONNECTION_CONTEXT_LENGTH) &&
            (RtlCompareMemory
            (&EaInfo->EaName, TdiConnectionContext,
            TDI_CONNECTION_CONTEXT_LENGTH) ==
            TDI_CONNECTION_CONTEXT_LENGTH))
    {
        /* This is a request to open a connection endpoint */

        /* Parameter checks */

        if (EaInfo->EaValueLength < sizeof(PVOID))
        {
            TI_DbgPrint(MIN_TRACE, ("Parameters are invalid.\n"));
            ExFreePoolWithTag(Context, TRANS_CONTEXT_TAG);
            return STATUS_INVALID_PARAMETER;
        }

        /* Can only do connection oriented communication using TCP */

        if (DeviceObject != TCPDeviceObject)
        {
            TI_DbgPrint(MIN_TRACE, ("Bad device object.\n"));
            ExFreePoolWithTag(Context, TRANS_CONTEXT_TAG);
            return STATUS_INVALID_PARAMETER;
        }

        ClientContext = *((PVOID*)(EaInfo->EaName + EaInfo->EaNameLength));

        /* Open connection endpoint file object */

        Status = FileOpenConnection(&Request, ClientContext);
        if (NT_SUCCESS(Status))
        {
            IrpSp->FileObject->FsContext2 = (PVOID)TDI_CONNECTION_FILE;
            Context->Handle.ConnectionContext = Request.Handle.ConnectionContext;
        }
    }
    else
    {
        /* This is a request to open a control connection */
        Status = FileOpenControlChannel(&Request);
        if (NT_SUCCESS(Status))
        {
            IrpSp->FileObject->FsContext2 = (PVOID)TDI_CONTROL_CHANNEL_FILE;
            Context->Handle.ControlChannel = Request.Handle.ControlChannel;
        }
    }

    if (!NT_SUCCESS(Status))
        ExFreePoolWithTag(Context, TRANS_CONTEXT_TAG);

    TI_DbgPrint(DEBUG_IRP, ("Leaving. Status = (0x%X).\n", Status));

    Irp->IoStatus.Status = Status;
    return Status;
}


/*
 * FUNCTION: Releases resources used by a file object
 * ARGUMENTS:
 *     DeviceObject = Pointer to a device object for this driver
 *     Irp          = Pointer to a I/O request packet
 * RETURNS:
 *     Status of the operation
 * NOTES:
 *     This function does not pend
 */
NTSTATUS TiCloseFileObject(
  PDEVICE_OBJECT DeviceObject,
  PIRP Irp)
{
    PIO_STACK_LOCATION IrpSp;
    PTRANSPORT_CONTEXT Context;
    TDI_REQUEST Request;
    NTSTATUS Status;

    IrpSp   = IoGetCurrentIrpStackLocation(Irp);
    Context = IrpSp->FileObject->FsContext;
    if (!Context)
    {
        TI_DbgPrint(MIN_TRACE, ("Parameters are invalid.\n"));
        return STATUS_INVALID_PARAMETER;
    }

    switch ((ULONG_PTR)IrpSp->FileObject->FsContext2)
    {
        case TDI_TRANSPORT_ADDRESS_FILE:
            Request.Handle.AddressHandle = Context->Handle.AddressHandle;
            Status = FileCloseAddress(&Request);
            break;

        case TDI_CONNECTION_FILE:
            Request.Handle.ConnectionContext = Context->Handle.ConnectionContext;
            Status = FileCloseConnection(&Request);
            break;

        case TDI_CONTROL_CHANNEL_FILE:
            Request.Handle.ControlChannel = Context->Handle.ControlChannel;
            Status = FileCloseControlChannel(&Request);
            break;

        default:
            Status = STATUS_INVALID_PARAMETER;
            break;
    }

    Irp->IoStatus.Status = Status;

    return Irp->IoStatus.Status;
}


NTSTATUS NTAPI
TiDispatchOpenClose(
  IN PDEVICE_OBJECT DeviceObject,
  IN PIRP Irp)
/*
 * FUNCTION: Main dispath routine
 * ARGUMENTS:
 *     DeviceObject = Pointer to a device object for this driver
 *     Irp          = Pointer to a I/O request packet
 * RETURNS:
 *     Status of the operation
 */
{
  PIO_STACK_LOCATION IrpSp;
  NTSTATUS Status;

//  DbgPrint("Called. DeviceObject is at (0x%X), IRP is at (0x%X).\n", DeviceObject, Irp);

  IrpSp = IoGetCurrentIrpStackLocation(Irp);

  switch (IrpSp->MajorFunction) {
  /* Open an address file, connection endpoint, or control connection */
  case IRP_MJ_CREATE:
    Status = TiCreateFileObject(DeviceObject, Irp);
    break;

  /* Close an address file, connection endpoint, or control connection */
  case IRP_MJ_CLOSE:
    Status = TiCloseFileObject(DeviceObject, Irp);
    break;

  default:
    Status = STATUS_INVALID_DEVICE_REQUEST;
  }

  //DbgPrint("Leaving. Status is (0x%X)\n", Status);

  return IRPFinish( Irp, Status );
}


NTSTATUS NTAPI
TiDispatchInternal(
  PDEVICE_OBJECT DeviceObject,
  PIRP Irp)
/*
 * FUNCTION: Internal IOCTL dispatch routine
 * ARGUMENTS:
 *     DeviceObject = Pointer to a device object for this driver
 *     Irp          = Pointer to a I/O request packet
 * RETURNS:
 *     Status of the operation
 */
{
  NTSTATUS Status;
  BOOLEAN Complete = TRUE;
  PIO_STACK_LOCATION IrpSp;

  IrpSp = IoGetCurrentIrpStackLocation(Irp);

  TI_DbgPrint(DEBUG_IRP, ("[TCPIP, TiDispatchInternal] Called. DeviceObject is at (0x%X), IRP is at (0x%X) MN (%d).\n",
    DeviceObject, Irp, IrpSp->MinorFunction));

  Irp->IoStatus.Status      = STATUS_SUCCESS;
  Irp->IoStatus.Information = 0;

  switch (IrpSp->MinorFunction) {
  case TDI_RECEIVE:
    Status = DispTdiReceive(Irp);
    Complete = FALSE;
    break;

  case TDI_RECEIVE_DATAGRAM:
    Status = DispTdiReceiveDatagram(Irp);
    Complete = FALSE;
    break;

  case TDI_SEND:
    Status = DispTdiSend(Irp);
    Complete = FALSE; /* Completed in DispTdiSend */
    break;

  case TDI_SEND_DATAGRAM:
    Status = DispTdiSendDatagram(Irp);
    Complete = FALSE;
    break;

  case TDI_ACCEPT:
    Status = DispTdiAccept(Irp);
    break;

  case TDI_LISTEN:
    Status = DispTdiListen(Irp);
    Complete = FALSE;
    break;

  case TDI_CONNECT:
    Status = DispTdiConnect(Irp);
    Complete = FALSE; /* Completed by the TCP event handler */
    break;

  case TDI_DISCONNECT:
    Status = DispTdiDisconnect(Irp);
    Complete = FALSE;
    break;

  case TDI_ASSOCIATE_ADDRESS:
    Status = DispTdiAssociateAddress(Irp);
    break;

  case TDI_DISASSOCIATE_ADDRESS:
    Status = DispTdiDisassociateAddress(Irp);
    break;

  case TDI_QUERY_INFORMATION:
    Status = DispTdiQueryInformation(DeviceObject, Irp);
    break;

  case TDI_SET_INFORMATION:
    Status = DispTdiSetInformation(Irp);
    break;

  case TDI_SET_EVENT_HANDLER:
    Status = DispTdiSetEventHandler(Irp);
    break;

  case TDI_ACTION:
    Status = STATUS_SUCCESS;
    break;

  /* An unsupported IOCTL code was submitted */
  default:
    Status = STATUS_INVALID_DEVICE_REQUEST;
  }

  TI_DbgPrint(DEBUG_IRP, ("[TCPIP, TiDispatchInternal] Leaving. Status = (0x%X).\n", Status));

  if( Complete )
      IRPFinish( Irp, Status );

  return Status;
}


NTSTATUS NTAPI
TiDispatch(
  PDEVICE_OBJECT DeviceObject,
  PIRP Irp)
/*
 * FUNCTION: Dispatch routine for IRP_MJ_DEVICE_CONTROL requests
 * ARGUMENTS:
 *     DeviceObject = Pointer to a device object for this driver
 *     Irp          = Pointer to a I/O request packet
 * RETURNS:
 *     Status of the operation
 */
{
  NTSTATUS Status;
  PIO_STACK_LOCATION IrpSp;

  IrpSp  = IoGetCurrentIrpStackLocation(Irp);

  TI_DbgPrint(DEBUG_IRP, ("[TCPIP, TiDispatch] Called. IRP is at (0x%X).\n", Irp));

  Irp->IoStatus.Information = 0;

#if 0
  Status = TdiMapUserRequest(DeviceObject, Irp, IrpSp);
  if (NT_SUCCESS(Status)) {
    TiDispatchInternal(DeviceObject, Irp);
    Status = STATUS_PENDING;
  } else {
#else
  if (TRUE) {
#endif
    /* See if this request is TCP/IP specific */
    switch (IrpSp->Parameters.DeviceIoControl.IoControlCode) {
    case IOCTL_TCP_QUERY_INFORMATION_EX:
      TI_DbgPrint(MIN_TRACE, ("TCP_QUERY_INFORMATION_EX\n"));
      Status = DispTdiQueryInformationEx(Irp, IrpSp);
      break;

    case IOCTL_TCP_SET_INFORMATION_EX:
      TI_DbgPrint(MIN_TRACE, ("TCP_SET_INFORMATION_EX\n"));
      Status = DispTdiSetInformationEx(Irp, IrpSp);
      break;

    case IOCTL_SET_IP_ADDRESS:
      TI_DbgPrint(MIN_TRACE, ("SET_IP_ADDRESS\n"));
      Status = DispTdiSetIPAddress(Irp, IrpSp);
      break;

    case IOCTL_DELETE_IP_ADDRESS:
      TI_DbgPrint(MIN_TRACE, ("DELETE_IP_ADDRESS\n"));
      Status = DispTdiDeleteIPAddress(Irp, IrpSp);
      break;

    default:
      TI_DbgPrint(MIN_TRACE, ("Unknown IOCTL 0x%X\n",
          IrpSp->Parameters.DeviceIoControl.IoControlCode));
      Status = STATUS_NOT_IMPLEMENTED;
      break;
    }
  }

  TI_DbgPrint(DEBUG_IRP, ("[TCPIP, TiDispatch] Leaving. Status = (0x%X).\n", Status));

  return IRPFinish( Irp, Status );
}


VOID NTAPI TiUnload(
  PDRIVER_OBJECT DriverObject)
/*
 * FUNCTION: Unloads the driver
 * ARGUMENTS:
 *     DriverObject = Pointer to driver object created by the system
 */
{
#if DBG
  KIRQL OldIrql;

  TcpipAcquireSpinLock(&AddressFileListLock, &OldIrql);
  if (!IsListEmpty(&AddressFileListHead)) {
    TI_DbgPrint(MIN_TRACE, ("[TCPIP, TiUnload] Called. Open address file objects exists.\n"));
  }
  TcpipReleaseSpinLock(&AddressFileListLock, OldIrql);
#endif
  /* Cancel timer */
  KeCancelTimer(&IPTimer);

  /* Unregister loopback adapter */
  LoopUnregisterAdapter(NULL);

  /* Unregister protocol with NDIS */
  LANUnregisterProtocol();

  /* Shutdown transport level protocol subsystems */
  TCPShutdown();
  UDPShutdown();
  RawIPShutdown();
  ICMPShutdown();

  /* Shutdown network level protocol subsystem */
  IPShutdown();

  /* Free NDIS buffer descriptors */
  if (GlobalBufferPool)
    NdisFreeBufferPool(GlobalBufferPool);

  /* Free NDIS packet descriptors */
  if (GlobalPacketPool)
    NdisFreePacketPool(GlobalPacketPool);

  /* Release all device objects */

  if (TCPDeviceObject)
    IoDeleteDevice(TCPDeviceObject);

  if (UDPDeviceObject)
    IoDeleteDevice(UDPDeviceObject);

  if (RawIPDeviceObject)
    IoDeleteDevice(RawIPDeviceObject);

  if (IPDeviceObject) {
     ChewShutdown();
     IoDeleteDevice(IPDeviceObject);
  }

  if (EntityList)
    ExFreePoolWithTag(EntityList, TDI_ENTITY_TAG);

  TI_DbgPrint(MAX_TRACE, ("[TCPIP, TiUnload] Leaving.\n"));
}

NTSTATUS NTAPI
DriverEntry(
  PDRIVER_OBJECT DriverObject,
  PUNICODE_STRING RegistryPath)
/*
 * FUNCTION: Main driver entry point
 * ARGUMENTS:
 *     DriverObject = Pointer to a driver object for this driver
 *     RegistryPath = Registry node for configuration parameters
 * RETURNS:
 *     Status of driver initialization
 */
{
  NTSTATUS Status;
  UNICODE_STRING strIpDeviceName = RTL_CONSTANT_STRING(DD_IP_DEVICE_NAME);
  UNICODE_STRING strRawDeviceName = RTL_CONSTANT_STRING(DD_RAWIP_DEVICE_NAME);
  UNICODE_STRING strUdpDeviceName = RTL_CONSTANT_STRING(DD_UDP_DEVICE_NAME);
  UNICODE_STRING strTcpDeviceName = RTL_CONSTANT_STRING(DD_TCP_DEVICE_NAME);
  UNICODE_STRING strNdisDeviceName = RTL_CONSTANT_STRING(TCPIP_PROTOCOL_NAME);
  NDIS_STATUS NdisStatus;
  LARGE_INTEGER DueTime;

  TI_DbgPrint(MAX_TRACE, ("[TCPIP, DriverEntry] Called\n"));

  /* TdiInitialize() ? */

  /* FIXME: Create symbolic links in Win32 namespace */

  /* Initialize our periodic timer and its associated DPC object. When the
     timer expires, the IPTimeout deferred procedure call (DPC) is queued */
  KeInitializeDpc(&IPTimeoutDpc, IPTimeoutDpcFn, NULL);
  KeInitializeTimer(&IPTimer);

  /* Create IP device object */
  Status = IoCreateDevice(DriverObject, 0, &strIpDeviceName,
    FILE_DEVICE_NETWORK, 0, FALSE, &IPDeviceObject);
  if (!NT_SUCCESS(Status)) {
    TI_DbgPrint(MIN_TRACE, ("Failed to create IP device object. Status (0x%X).\n", Status));
    TiUnload(DriverObject);
    return Status;
  }

  ChewInit( IPDeviceObject );

  /* Create RawIP device object */
  Status = IoCreateDevice(DriverObject, 0, &strRawDeviceName,
    FILE_DEVICE_NETWORK, 0, FALSE, &RawIPDeviceObject);
  if (!NT_SUCCESS(Status)) {
    TI_DbgPrint(MIN_TRACE, ("Failed to create RawIP device object. Status (0x%X).\n", Status));
    TiUnload(DriverObject);
    return Status;
  }

  /* Create UDP device object */
  Status = IoCreateDevice(DriverObject, 0, &strUdpDeviceName,
    FILE_DEVICE_NETWORK, 0, FALSE, &UDPDeviceObject);
  if (!NT_SUCCESS(Status)) {
    TI_DbgPrint(MIN_TRACE, ("Failed to create UDP device object. Status (0x%X).\n", Status));
    TiUnload(DriverObject);
    return Status;
  }

  /* Create TCP device object */
  Status = IoCreateDevice(DriverObject, 0, &strTcpDeviceName,
    FILE_DEVICE_NETWORK, 0, FALSE, &TCPDeviceObject);
  if (!NT_SUCCESS(Status)) {
    TI_DbgPrint(MIN_TRACE, ("Failed to create TCP device object. Status (0x%X).\n", Status));
    TiUnload(DriverObject);
    return Status;
  }

  /* Setup network layer and transport layer entities */
  KeInitializeSpinLock(&EntityListLock);
  EntityList = ExAllocatePoolWithTag(NonPagedPool,
                                     sizeof(TDIEntityID) * MAX_TDI_ENTITIES,
                                     TDI_ENTITY_TAG );
  if (!EntityList) {
    TI_DbgPrint(MIN_TRACE, ("Insufficient resources.\n"));
    TiUnload(DriverObject);
    return STATUS_INSUFFICIENT_RESOURCES;
  }

  EntityCount = 0;
  EntityMax   = MAX_TDI_ENTITIES;

  /* Allocate NDIS packet descriptors */
  NdisAllocatePacketPoolEx(&NdisStatus, &GlobalPacketPool, 500, 1500, sizeof(PACKET_CONTEXT));
  if (NdisStatus != NDIS_STATUS_SUCCESS) {
    TiUnload(DriverObject);
    return STATUS_INSUFFICIENT_RESOURCES;
  }

  /* Allocate NDIS buffer descriptors */
  NdisAllocateBufferPool(&NdisStatus, &GlobalBufferPool, 2000);
  if (NdisStatus != NDIS_STATUS_SUCCESS) {
    TiUnload(DriverObject);
    return STATUS_INSUFFICIENT_RESOURCES;
  }

  /* Initialize address file list and protecting spin lock */
  InitializeListHead(&AddressFileListHead);
  KeInitializeSpinLock(&AddressFileListLock);

  /* Initialize connection endpoint list and protecting spin lock */
  InitializeListHead(&ConnectionEndpointListHead);
  KeInitializeSpinLock(&ConnectionEndpointListLock);

  /* Initialize interface list and protecting spin lock */
  InitializeListHead(&InterfaceListHead);
  KeInitializeSpinLock(&InterfaceListLock);

  /* Initialize network level protocol subsystem */
  IPStartup(RegistryPath);

  /* Initialize transport level protocol subsystems */
  Status = RawIPStartup();
  if( !NT_SUCCESS(Status) ) {
      TiUnload(DriverObject);
      return Status;
  }

  Status = UDPStartup();
  if( !NT_SUCCESS(Status) ) {
      TiUnload(DriverObject);
      return Status;
  }

  Status = TCPStartup();
  if( !NT_SUCCESS(Status) ) {
      TiUnload(DriverObject);
      return Status;
  }

  Status = ICMPStartup();
  if( !NT_SUCCESS(Status) ) {
      TiUnload(DriverObject);
      return Status;
  }

  /* Use direct I/O */
  IPDeviceObject->Flags    |= DO_DIRECT_IO;
  RawIPDeviceObject->Flags |= DO_DIRECT_IO;
  UDPDeviceObject->Flags   |= DO_DIRECT_IO;
  TCPDeviceObject->Flags   |= DO_DIRECT_IO;

  /* Initialize the driver object with this driver's entry points */
  DriverObject->MajorFunction[IRP_MJ_CREATE]  = TiDispatchOpenClose;
  DriverObject->MajorFunction[IRP_MJ_CLOSE]   = TiDispatchOpenClose;
  DriverObject->MajorFunction[IRP_MJ_INTERNAL_DEVICE_CONTROL] = TiDispatchInternal;
  DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = TiDispatch;

  DriverObject->DriverUnload = TiUnload;

  /* Open loopback adapter */
  Status = LoopRegisterAdapter(NULL, NULL);
  if (!NT_SUCCESS(Status)) {
    TI_DbgPrint(MIN_TRACE, ("Failed to create loopback adapter. Status (0x%X).\n", Status));
    TiUnload(DriverObject);
    return Status;
  }

  /* Register protocol with NDIS */
  /* This used to be IP_DEVICE_NAME but the DDK says it has to match your entry in the SCM */
  Status = LANRegisterProtocol(&strNdisDeviceName);
  if (!NT_SUCCESS(Status)) {
      TI_DbgPrint(MIN_TRACE,("Failed to register protocol with NDIS; status 0x%x\n", Status));
      TiWriteErrorLog(
      DriverObject,
      EVENT_TRANSPORT_REGISTER_FAILED,
      TI_ERROR_DRIVERENTRY,
      Status,
      NULL,
      0,
      NULL);
      TiUnload(DriverObject);
      return Status;
  }

  /* Start the periodic timer with an initial and periodic
     relative expiration time of IP_TIMEOUT milliseconds */
  DueTime.QuadPart = -(LONGLONG)IP_TIMEOUT * 10000;
  KeSetTimerEx(&IPTimer, DueTime, IP_TIMEOUT, &IPTimeoutDpc);

  TI_DbgPrint(MAX_TRACE, ("[TCPIP, DriverEntry] Finished\n"));


  return STATUS_SUCCESS;
}

VOID NTAPI
IPAddInterface(
    ULONG   Unknown0,
    ULONG   Unknown1,
    ULONG   Unknown2,
    ULONG   Unknown3,
    ULONG   Unknown4)
{
    UNIMPLEMENTED
}


VOID NTAPI
IPDelInterface(
    ULONG   Unknown0)
{
    UNIMPLEMENTED
}


VOID NTAPI
LookupRoute(
    ULONG   Unknown0,
    ULONG   Unknown1)
{
    UNIMPLEMENTED
}

/* EOF */