C++ NdisAcquireSpinLock函数代码示例

/*
 * --------------------------------------------------------------------------
 *  Implements filter driver's FilterAttach function.
 *
 *  This function allocates the switch context, and initializes its necessary
 *  members.
 * --------------------------------------------------------------------------
 */
NDIS_STATUS
OvsExtAttach(NDIS_HANDLE ndisFilterHandle,
             NDIS_HANDLE filterDriverContext,
             PNDIS_FILTER_ATTACH_PARAMETERS attachParameters)
{
    NDIS_STATUS status = NDIS_STATUS_FAILURE;
    NDIS_FILTER_ATTRIBUTES ovsExtAttributes;
    POVS_SWITCH_CONTEXT switchContext = NULL;

    UNREFERENCED_PARAMETER(filterDriverContext);

    OVS_LOG_TRACE("Enter: ndisFilterHandle %p", ndisFilterHandle);

    ASSERT(filterDriverContext == (NDIS_HANDLE)gOvsExtDriverObject);
    if (attachParameters->MiniportMediaType != NdisMedium802_3) {
        status = NDIS_STATUS_INVALID_PARAMETER;
        goto cleanup;
    }

    if (gOvsExtDriverHandle == NULL) {
        OVS_LOG_TRACE("Exit: OVSEXT driver is not loaded.");
        ASSERT(FALSE);
        goto cleanup;
    }

    NdisAcquireSpinLock(gOvsCtrlLock);
    if (gOvsSwitchContext) {
        NdisReleaseSpinLock(gOvsCtrlLock);
        OVS_LOG_TRACE("Exit: Failed to create OVS Switch, only one datapath is"
                      "supported, %p.", gOvsSwitchContext);
        goto cleanup;
    }
    if (gOvsInAttach) {
        NdisReleaseSpinLock(gOvsCtrlLock);
        /* Just fail the request. */
        OVS_LOG_TRACE("Exit: Failed to create OVS Switch, since another attach"
                      "instance is in attach process.");
        goto cleanup;
    }
    gOvsInAttach = TRUE;
    NdisReleaseSpinLock(gOvsCtrlLock);

    status = OvsInitIpHelper(ndisFilterHandle);
    if (status != STATUS_SUCCESS) {
        OVS_LOG_ERROR("Exit: Failed to initialize IP helper.");
        goto cleanup;
    }

    status = OvsCreateSwitch(ndisFilterHandle, &switchContext);
    if (status != NDIS_STATUS_SUCCESS) {
        OvsCleanupIpHelper();
        goto cleanup;
    }
    ASSERT(switchContext);

    /*
     * Register the switch context with NDIS so NDIS can pass it back to the
     * Filterxxx callback functions as the 'FilterModuleContext' parameter.
     */
    RtlZeroMemory(&ovsExtAttributes, sizeof(NDIS_FILTER_ATTRIBUTES));
    ovsExtAttributes.Header.Revision = NDIS_FILTER_ATTRIBUTES_REVISION_1;
    ovsExtAttributes.Header.Size = sizeof(NDIS_FILTER_ATTRIBUTES);
    ovsExtAttributes.Header.Type = NDIS_OBJECT_TYPE_FILTER_ATTRIBUTES;
    ovsExtAttributes.Flags = 0;

    NDIS_DECLARE_FILTER_MODULE_CONTEXT(OVS_SWITCH_CONTEXT);
    status = NdisFSetAttributes(ndisFilterHandle, switchContext, &ovsExtAttributes);
    if (status != NDIS_STATUS_SUCCESS) {
        OVS_LOG_ERROR("Failed to set attributes.");
        OvsCleanupIpHelper();
        goto cleanup;
    }

    /* Setup the state machine. */
    switchContext->controlFlowState = OvsSwitchAttached;
    switchContext->dataFlowState = OvsSwitchPaused;

    gOvsSwitchContext = switchContext;
    KeMemoryBarrier();

cleanup:
    gOvsInAttach = FALSE;
    if (status != NDIS_STATUS_SUCCESS) {
        if (switchContext != NULL) {
            OvsDeleteSwitch(switchContext);
        }
    }
    OVS_LOG_TRACE("Exit: status %x", status);

    return status;
}

int divert_filter_send(PADAPT pAdapt, PNDIS_PACKET Packet, int in)
{
#define HDR_SIZE 54
	int len, cnt;
	PNDIS_BUFFER buf;
	char crap[HDR_SIZE];
	int rc = 0, rd;
	struct ether_header  *pEthHdr;      // See ../B2Winet/ethernet.h
	struct ip            *pIPHeader;
	struct tcphdr	     *tcp;
	struct divert_packet *dp;
	int off = 0; // 14;
        NDISPROT_ETH_HEADER UNALIGNED *pEthHeader;

	NdisAcquireSpinLock(&pAdapt->Lock);

	NdisQueryPacket(Packet, NULL, &cnt, &buf, &len);

	if (len < HDR_SIZE)
		goto Out;

	FltReadOnPacket(Packet, crap, HDR_SIZE, 0, &rd);
	if (rd < HDR_SIZE)
		goto Out;

	pEthHdr = (struct ether_header*) crap;
	pEthHeader = pEthHdr;

	if (ntohs( pEthHdr->ether_type ) != ETHERTYPE_IP)
		goto Out;

	if (in && get_pa(pEthHeader->SrcAddr))
		goto Out;

	pIPHeader = (struct ip * ) (pEthHdr + 1);

	if (pIPHeader->ip_p != IPPROTO_TCP)
		goto Out;

	tcp	  = (struct tcphr*) (pIPHeader + 1);

#if 0
	if (ntohs(tcp->th_dport) == 666)
		rc = 1;
#endif

	lock();

	if (!_open)
		goto Fuck;

	dp = get_packet();
	if (!dp) {
		DbgPrint("divert_packet() - outta space dude\n");
		goto Fuck;
	}

	dp->dp_len = len - off;
	FltReadOnPacket(Packet, dp->dp_packet, dp->dp_len, off, &rd);
//	rd = dp->dp_len;
	if (rd != dp->dp_len)
		goto Fuck;

	dp->dp_flags = 1;

	kick_pending();

	rc = 1;

Fuck:
	unlock();
Out:
	NdisReleaseSpinLock(&pAdapt->Lock);

	return rc;
#undef HDR_SIZE
}

//.........这里部分代码省略.........
VOID	RTUSBCancelPendingBulkOutIRP(
	IN	PRTMP_ADAPTER	pAd)
{
	PHT_TX_CONTEXT		pHTTXContext;
	PTX_CONTEXT			pMLMEContext;
	PTX_CONTEXT			pBeaconContext;
	PTX_CONTEXT			pNullContext;
	PTX_CONTEXT			pPsPollContext;
	PTX_CONTEXT			pRTSContext;
	UINT				i, Idx;
//	unsigned int 		IrqFlags;
//	NDIS_SPIN_LOCK		*pLock;
//	BOOLEAN				*pPending;


//	pLock = &pAd->BulkOutLock[MGMTPIPEIDX];
//	pPending = &pAd->BulkOutPending[MGMTPIPEIDX];

	for (Idx = 0; Idx < 4; Idx++)
	{
		pHTTXContext = &(pAd->TxContext[Idx]);

		if (pHTTXContext->IRPPending == TRUE)
		{

			// Get the USB_CONTEXT and cancel it's IRP; the completion routine will itself
			// remove it from the HeadPendingSendList and NULL out HeadPendingSendList
			//	when the last IRP on the list has been	cancelled; that's how we exit this loop
			//

			RTUSB_UNLINK_URB(pHTTXContext->pUrb);

			// Sleep 200 microseconds to give cancellation time to work
			RTMPusecDelay(200);
		}

		pAd->BulkOutPending[Idx] = FALSE;
	}

	//RTMP_IRQ_LOCK(pLock, IrqFlags);
	for (i = 0; i < MGMT_RING_SIZE; i++)
	{
		pMLMEContext = (PTX_CONTEXT)pAd->MgmtRing.Cell[i].AllocVa;
		if(pMLMEContext && (pMLMEContext->IRPPending == TRUE))
		{

			// Get the USB_CONTEXT and cancel it's IRP; the completion routine will itself
			// remove it from the HeadPendingSendList and NULL out HeadPendingSendList
			//	when the last IRP on the list has been	cancelled; that's how we exit this loop
			//

			RTUSB_UNLINK_URB(pMLMEContext->pUrb);
			pMLMEContext->IRPPending = FALSE;

			// Sleep 200 microsecs to give cancellation time to work
			RTMPusecDelay(200);
		}
	}
	pAd->BulkOutPending[MGMTPIPEIDX] = FALSE;
	//RTMP_IRQ_UNLOCK(pLock, IrqFlags);


	for (i = 0; i < BEACON_RING_SIZE; i++)
	{
		pBeaconContext = &(pAd->BeaconContext[i]);

		if(pBeaconContext->IRPPending == TRUE)
		{

			// Get the USB_CONTEXT and cancel it's IRP; the completion routine will itself
			// remove it from the HeadPendingSendList and NULL out HeadPendingSendList
			//	when the last IRP on the list has been	cancelled; that's how we exit this loop
			//

			RTUSB_UNLINK_URB(pBeaconContext->pUrb);

			// Sleep 200 microsecs to give cancellation time to work
			RTMPusecDelay(200);
		}
	}

	pNullContext = &(pAd->NullContext);
	if (pNullContext->IRPPending == TRUE)
		RTUSB_UNLINK_URB(pNullContext->pUrb);

	pRTSContext = &(pAd->RTSContext);
	if (pRTSContext->IRPPending == TRUE)
		RTUSB_UNLINK_URB(pRTSContext->pUrb);

	pPsPollContext = &(pAd->PsPollContext);
	if (pPsPollContext->IRPPending == TRUE)
		RTUSB_UNLINK_URB(pPsPollContext->pUrb);

	for (Idx = 0; Idx < 4; Idx++)
	{
		NdisAcquireSpinLock(&pAd->BulkOutLock[Idx]);
		pAd->BulkOutPending[Idx] = FALSE;
		NdisReleaseSpinLock(&pAd->BulkOutLock[Idx]);
	}
}

REPEATER_CLIENT_ENTRY *RTMPLookupRepeaterCliEntry(
	IN PVOID pData,
	IN BOOLEAN bRealMAC,
	IN PUCHAR pAddr,
	IN BOOLEAN bIsPad,
	OUT PUCHAR pIsLinkValid)
{
	ULONG HashIdx;
	UCHAR tempMAC[6];
	REPEATER_CLIENT_ENTRY *pEntry = NULL;
	REPEATER_CLIENT_ENTRY_MAP *pMapEntry = NULL;

	if (bIsPad == TRUE) {
		NdisAcquireSpinLock(&((PRTMP_ADAPTER)pData)->ApCfg.ReptCliEntryLock);	
	} else {
		NdisAcquireSpinLock(((REPEATER_ADAPTER_DATA_TABLE *)pData)->EntryLock);
	}
	
	COPY_MAC_ADDR(tempMAC, pAddr);
	HashIdx = MAC_ADDR_HASH_INDEX(tempMAC);
    *pIsLinkValid = TRUE;

	if (bRealMAC == TRUE)
	{
		if (bIsPad == TRUE) {
			pMapEntry = ((PRTMP_ADAPTER)pData)->ApCfg.ReptMapHash[HashIdx];
		} else
			pMapEntry = *((((REPEATER_ADAPTER_DATA_TABLE *)pData)->MapHash) + HashIdx) ;

		
		while (pMapEntry)
		{
			pEntry = pMapEntry->pReptCliEntry;

			if (MAC_ADDR_EQUAL(pEntry->OriginalAddress, tempMAC))
			{
				if (pEntry->CliValid == FALSE) {
					*pIsLinkValid = FALSE;
					pEntry = NULL;
				}
				
				break;			
			}
			else
			{
				pEntry = NULL;
				pMapEntry = pMapEntry->pNext;
			}
		}
	}
	else
	{
		if (bIsPad == TRUE) {
			pEntry = ((PRTMP_ADAPTER)pData)->ApCfg.ReptCliHash[HashIdx];
		} else {
			pEntry = *((((REPEATER_ADAPTER_DATA_TABLE *)pData)->CliHash) + HashIdx) ;
		}

		while (pEntry)
		{
			if (MAC_ADDR_EQUAL(pEntry->CurrentAddress, tempMAC))
			{
				if (pEntry->CliValid == FALSE) {
					*pIsLinkValid = FALSE;
					pEntry = NULL;
				}
				break;
			}
			else
				pEntry = pEntry->pNext;
		}
	}

	if (bIsPad == TRUE) {
		NdisReleaseSpinLock(&((PRTMP_ADAPTER)pData)->ApCfg.ReptCliEntryLock);
	} else {
		NdisReleaseSpinLock(((REPEATER_ADAPTER_DATA_TABLE *)pData)->EntryLock);
	}

	return pEntry;
}

VOID CMDHandler(                                                                                                                                                
    IN PRTMP_ADAPTER pAd)                                                                                                                                       
{                                                                                                                                                               
	PCmdQElmt		cmdqelmt;                                                                                                                                       
	PUCHAR			pData;                                                                                                                                          
	NDIS_STATUS		NdisStatus = NDIS_STATUS_SUCCESS;                                                                                                               
//	ULONG			Now = 0;
	NTSTATUS		ntStatus;
//	unsigned long	IrqFlags;
	
	while (pAd && pAd->CmdQ.size > 0)	
	{                                                                                                                                                           
		NdisStatus = NDIS_STATUS_SUCCESS;
		                                                                                                                      
		NdisAcquireSpinLock(&pAd->CmdQLock);
		RTThreadDequeueCmd(&pAd->CmdQ, &cmdqelmt);
		NdisReleaseSpinLock(&pAd->CmdQLock);
		                                                                                                        
		if (cmdqelmt == NULL)                                                                                                                                   
			break; 
			                                                                                                                                             
		pData = cmdqelmt->buffer;                                      
		                                                                                         
		if(!(RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_NIC_NOT_EXIST) || RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS)))
		{
			switch (cmdqelmt->command)
			{
				case CMDTHREAD_CHECK_GPIO:
					{
#ifdef CONFIG_STA_SUPPORT
						UINT32 data;
#endif // CONFIG_STA_SUPPORT //

#ifdef RALINK_ATE			
       					if(ATE_ON(pAd))
						{
							ATEDBGPRINT(RT_DEBUG_TRACE, ("The driver is in ATE mode now\n"));
							break;
						}	
#endif // RALINK_ATE //

#ifdef CONFIG_STA_SUPPORT


						IF_DEV_CONFIG_OPMODE_ON_STA(pAd)
						{
							// Read GPIO pin2 as Hardware controlled radio state

							RTUSBReadMACRegister( pAd, GPIO_CTRL_CFG, &data);

							if (data & 0x04)
							{
								pAd->StaCfg.bHwRadio = TRUE;                                                                                                            
							} 
							else
							{
								pAd->StaCfg.bHwRadio = FALSE;                                                                                                           
							}                                                                                                                                               
	        	                                                                                                                                                        
							if(pAd->StaCfg.bRadio != (pAd->StaCfg.bHwRadio && pAd->StaCfg.bSwRadio))                                                                    
							{                                                                                                                                               
								pAd->StaCfg.bRadio = (pAd->StaCfg.bHwRadio && pAd->StaCfg.bSwRadio);                                                                    
								if(pAd->StaCfg.bRadio == TRUE)                                                                                                          
								{                                                                                                                                           
									DBGPRINT_RAW(RT_DEBUG_ERROR, ("!!! Radio On !!!\n"));  
	                                                                                                                            
									MlmeRadioOn(pAd);                                                                                                                       
									// Update extra information                                                                                                             
									pAd->ExtraInfo = EXTRA_INFO_CLEAR;                                                                                                      
								}                                                                                                                                           
								else                                                                                                                                        
								{                                                                                                                                           
									DBGPRINT_RAW(RT_DEBUG_ERROR, ("!!! Radio Off !!!\n"));
	                                                                                                                                    
									MlmeRadioOff(pAd);                                                                                                                      
									// Update extra information                                                                                                             
									pAd->ExtraInfo = HW_RADIO_OFF;                                                                                                          
								}                                                                                                                                           
							}
						}
#endif // CONFIG_STA_SUPPORT //
					}
					break;                                                                                                                                         
                                                                                                                                            
#ifdef CONFIG_STA_SUPPORT
				case CMDTHREAD_QKERIODIC_EXECUT:
					{
						StaQuickResponeForRateUpExec(NULL, pAd, NULL, NULL);
					}
					break;
#endif // CONFIG_STA_SUPPORT //

				case CMDTHREAD_RESET_BULK_OUT:                                                                                                                     
					{
						UINT32		MACValue;
						UCHAR		Index;
						int			ret=0;
						PHT_TX_CONTEXT	pHTTXContext;
//						RTMP_TX_RING *pTxRing;
						unsigned long IrqFlags;
//.........这里部分代码省略.........

/*
	========================================================================
	
	Routine Description:

	Arguments:

	Return Value:

	Note:
	
	========================================================================
*/
VOID	RTUSBCancelPendingBulkOutIRP(
	IN	PRTMP_ADAPTER	pAd)
{
	PHT_TX_CONTEXT		pHTTXContext;
	PTX_CONTEXT			pMLMEContext;
	PTX_CONTEXT			pNullContext;
	PTX_CONTEXT			pPsPollContext;
	UINT				i, Idx;
/*	unsigned int 		IrqFlags;*/
/*	NDIS_SPIN_LOCK		*pLock;*/
/*	BOOLEAN				*pPending;*/
	

/*	pLock = &pAd->BulkOutLock[MGMTPIPEIDX];*/
/*	pPending = &pAd->BulkOutPending[MGMTPIPEIDX];*/

	for (Idx = 0; Idx < 4; Idx++)
	{
		pHTTXContext = &(pAd->TxContext[Idx]);

		if (pHTTXContext->IRPPending == TRUE)
		{

			/* Get the USB_CONTEXT and cancel it's IRP; the completion routine will itself*/
			/* remove it from the HeadPendingSendList and NULL out HeadPendingSendList*/
			/*	when the last IRP on the list has been	cancelled; that's how we exit this loop*/
			

			RTUSB_UNLINK_URB(pHTTXContext->pUrb);

			/* Sleep 200 microseconds to give cancellation time to work*/
			RTMPusecDelay(200);
		}

#ifdef RALINK_ATE
		pHTTXContext->bCopySavePad = 0;
		pHTTXContext->CurWritePosition = 0;
		pHTTXContext->CurWriteRealPos = 0;
		pHTTXContext->bCurWriting = FALSE;
		pHTTXContext->NextBulkOutPosition = 0;
		pHTTXContext->ENextBulkOutPosition = 0;
#endif /* RALINK_ATE */
		pAd->BulkOutPending[Idx] = FALSE;
	}

	/*RTMP_IRQ_LOCK(pLock, IrqFlags);*/
	for (i = 0; i < MGMT_RING_SIZE; i++)
	{
		pMLMEContext = (PTX_CONTEXT)pAd->MgmtRing.Cell[i].AllocVa;
		if(pMLMEContext && (pMLMEContext->IRPPending == TRUE))
		{

			/* Get the USB_CONTEXT and cancel it's IRP; the completion routine will itself*/
			/* remove it from the HeadPendingSendList and NULL out HeadPendingSendList*/
			/*	when the last IRP on the list has been	cancelled; that's how we exit this loop*/
			

			RTUSB_UNLINK_URB(pMLMEContext->pUrb);
			pMLMEContext->IRPPending = FALSE;
			
			/* Sleep 200 microsecs to give cancellation time to work*/
			RTMPusecDelay(200);
		}
	}
	pAd->BulkOutPending[MGMTPIPEIDX] = FALSE;
	/*RTMP_IRQ_UNLOCK(pLock, IrqFlags);*/

	pNullContext = &(pAd->NullContext);
	if (pNullContext->IRPPending == TRUE)
		RTUSB_UNLINK_URB(pNullContext->pUrb);

	pPsPollContext = &(pAd->PsPollContext);
	if (pPsPollContext->IRPPending == TRUE)
		RTUSB_UNLINK_URB(pPsPollContext->pUrb);

	for (Idx = 0; Idx < 4; Idx++)
	{
		NdisAcquireSpinLock(&pAd->BulkOutLock[Idx]);
		pAd->BulkOutPending[Idx] = FALSE;
		NdisReleaseSpinLock(&pAd->BulkOutLock[Idx]);
	}
}

NTSTATUS
ssh_interceptor_iodevice_dispatch_ioctl(PDEVICE_OBJECT device,
                                        PIRP irp)
{
#ifdef HAS_IOCTL_HANDLERS
  PIO_STACK_LOCATION io_stack = IoGetCurrentIrpStackLocation(irp);
  ULONG ioctl_code = io_stack->Parameters.DeviceIoControl.IoControlCode;
  SshInterceptorIoDevice io_dev = SSH_NTDEV_TO_SSHDEV(device);
  SshIoDeviceIoctlHandler handler = NULL;
  PLIST_ENTRY entry;

  NdisAcquireSpinLock(&io_dev->ioctl_handler_list_lock);
  entry = io_dev->ioctl_handler_list.Flink;
  while (entry != &io_dev->ioctl_handler_list)
    {
      SshIoDeviceIoctlHandler h;

      h = CONTAINING_RECORD(entry, SshIoDeviceIoctlHandlerStruct, link);

      if (h->ioctl_code == ioctl_code)
        {
          handler = h;
          InterlockedIncrement(&handler->ref_count);
          break;
        }

      entry = entry->Flink;
    }
  NdisReleaseSpinLock(&io_dev->ioctl_handler_list_lock);

  if (handler != NULL)
    {
      SshIoDeviceIoctlRequest ioctl;




      ioctl = ssh_calloc(1, sizeof(*ioctl));
      if (ioctl == NULL)
        {
          irp->IoStatus.Status = STATUS_UNSUCCESSFUL;
          irp->IoStatus.Information = 0;
          IoCompleteRequest(irp, IO_NO_INCREMENT);

          return STATUS_UNSUCCESSFUL;
        }

      /* Initialize te IOCTL request */
      ioctl->public_data.device = io_dev;
      ioctl->public_data.ioctl_code = ioctl_code;
      ioctl->public_data.context = handler;                  
      ioctl->public_data.cancel_id = ioctl; 
      ioctl->public_data.input_buf_len = 
        io_stack->Parameters.DeviceIoControl.InputBufferLength;
      ioctl->public_data.output_buf_len = 
        io_stack->Parameters.DeviceIoControl.OutputBufferLength;

      switch (ioctl_code & 0x00000003)
        {
        case METHOD_BUFFERED:
          ioctl->public_data.input_buf = irp->AssociatedIrp.SystemBuffer;
          ioctl->public_data.output_buf = irp->AssociatedIrp.SystemBuffer;
          break;

        case METHOD_NEITHER:
          ioctl->public_data.input_buf = 
            io_stack->Parameters.DeviceIoControl.Type3InputBuffer;
          ioctl->public_data.output_buf = irp->UserBuffer;
          break;




        case METHOD_IN_DIRECT:  
        case METHOD_OUT_DIRECT:
        default:
          SSH_NOTREACHED;
          break;
        }
      ioctl->public_data.bytes_read = 0;
      ioctl->public_data.bytes_written = 0;
      ioctl->private_data.irp = irp;
      NdisAcquireSpinLock(&io_dev->ioctl_req_list_lock);
      InsertTailList(&io_dev->active_ioctl_req_list,
		     &ioctl->private_data.link);
      NdisReleaseSpinLock(&io_dev->ioctl_req_list_lock);

      irp->IoStatus.Status = STATUS_PENDING;
      IoMarkIrpPending(irp);

#pragma warning(disable: 4311 4312)
      IoSetCancelRoutine(irp, ssh_interceptor_iodevice_cancel_queued_ioctl);
#pragma warning(default: 4311 4312)

      (*(handler->ioctl_handler))(handler->context, &ioctl->public_data);

      return STATUS_PENDING;
    }
#endif /* HAS_IOCTL_HANDLERS */

//.........这里部分代码省略.........

static void 
ssh_interceptor_iodevice_do_reads(SshInterceptorIoDevice io_dev)
{
  SshDeviceBuffer buffer;
  PIO_STACK_LOCATION irp_stack = NULL;
  char *dest = NULL;
  char *base_addr = NULL;
  PIRP irp = NULL;

  NdisAcquireSpinLock(&io_dev->output_queue_lock);
  buffer = io_dev->current_read_buf;
  NdisReleaseSpinLock(&io_dev->output_queue_lock);

  /* Complete as many queued output buffers and pending reads as possible */
  while (TRUE)
    {
      PLIST_ENTRY entry;
      unsigned bytes_copied;

      /* Try to find some data to write */
      if (buffer == NULL)
        {
          NdisAcquireSpinLock(&io_dev->output_queue_lock);
          if (!IsListEmpty(&io_dev->output_queue))
            {
              entry = RemoveHeadList(&io_dev->output_queue);
              buffer = CONTAINING_RECORD(entry, SshDeviceBufferStruct, link);
              /* If this is an unreliable message, it must also be removed
                 from the unreliable_output_queue! */
              if (buffer->reliable == 0)
                RemoveEntryList(&buffer->unreliable_list_link);
            }
          io_dev->current_read_buf = buffer;
          NdisReleaseSpinLock(&io_dev->output_queue_lock);

          /* Exit the loop if no data was available in output queue */
          if (buffer == NULL)
            goto complete;  
        }

      /* Try to find queued read IRP */
      if (irp == NULL)
        {
          entry = NdisInterlockedRemoveHeadList(&io_dev->read_queue,
                                                &io_dev->read_queue_lock);
          if (entry)
            {
              irp = CONTAINING_RECORD(entry, IRP, Tail.Overlay.ListEntry);
              irp_stack = IoGetCurrentIrpStackLocation(irp);

              /* There is no need to check for canceled status, because
                 cancelation is protected by the same lock as the queue
                 itself. We may actually pop off an IRP for which cancel
                 has already been issued, but we can complete it as usual. */
#pragma warning(disable: 4311 4312)
              IoSetCancelRoutine(irp, NULL);
#pragma warning(default: 4311 4312)
              irp->IoStatus.Information = 0;
              irp->IoStatus.Status = STATUS_SUCCESS;

              base_addr = ssh_iodevice_map_buffer(irp->MdlAddress);
              if (base_addr == NULL)
                {
                  /* Mapping of user-mode buffer could fail if the system is
                     very low on resources. */
                  IoCompleteRequest(irp, IO_NETWORK_INCREMENT);
                  irp = NULL;
                  continue;
                }

              dest = base_addr;
            }
          else
            {
              /* No read IRPs available, exit the loop */
              goto complete;
            }
        }

      /* We copy either the whole buffer or part of it if there isn't enough
         space left in the currently processed read IRP. */
      bytes_copied = buffer->len;
      if (irp->IoStatus.Information + bytes_copied >
          irp_stack->Parameters.Read.Length)
        {
          bytes_copied = irp_stack->Parameters.Read.Length -
                         (unsigned int)irp->IoStatus.Information;
        }

      NdisMoveMemory(dest, buffer->addr + buffer->offset, bytes_copied);

      buffer->offset += bytes_copied;
      buffer->len -= bytes_copied;
      if (buffer->len == 0)
        {
          NdisAcquireSpinLock(&io_dev->output_queue_lock);
          io_dev->current_read_buf = NULL;
          NdisReleaseSpinLock(&io_dev->output_queue_lock);

          ssh_iodevice_buffer_free(io_dev, buffer); 
//.........这里部分代码省略.........

VOID
ElnkStagedAllocation(
    IN PELNK_ADAPTER Adapter
    )

/*++

Routine Description:

    This routine attempts to take a packet through a stage of allocation.

Arguments:

    Adapter - The adapter that the packets are coming through.

Return Value:

    None.

--*/

{
    UINT CbIndex;

    PNDIS_PACKET FirstPacket = Adapter->FirstStagePacket;

    if ELNKDEBUG DPrint1("StagedAllocation\n");
    //
    // For each stage, we check to see that it is open,
    // that somebody else isn't already processing,
    // and that there is some work from the previous
    // stage to do.
    //

    ASSERT (Adapter->StageOpen &&
            !Adapter->AlreadyProcessingStage &&
            Adapter->FirstStagePacket);

    //
    // If we successfully acquire a command block, this
    // is the index to it.
    //

    Adapter->AlreadyProcessingStage = TRUE;

    //
    // We look to see if there is an available Command Block.
    // If there isn't then stage 2 will close.
    //

    IF_LOG('p');

    if (ElnkAcquireCommandBlock(
        Adapter,
        &CbIndex
        )) {

        IF_LOG('a');

        //
        // Remove from queue
        //

        Adapter->FirstStagePacket = PELNK_RESERVED_FROM_PACKET(FirstPacket)->Next;

        if (!Adapter->FirstStagePacket) {

            Adapter->LastStagePacket = NULL;

        }

        NdisReleaseSpinLock(&Adapter->Lock);

        //
        // We have a command block.  Assign all packet
        // buffers to the command block.
        //

        ElnkAssignPacketToCommandBlock(
            Adapter,
            FirstPacket,
            CbIndex
            );

        //
        // We need exclusive access to the Command Queue so
        // that we can move this packet on to the next stage.
        //

        NdisAcquireSpinLock(&Adapter->Lock);

        ElnkPutPacketOnFinishTrans(
                Adapter,
                FirstPacket
                );

        ElnkSubmitCommandBlock(
                Adapter,
                CbIndex
                );
//.........这里部分代码省略.........

NDIS_STATUS
ElnkSend(
    IN NDIS_HANDLE MacBindingHandle,
    IN PNDIS_PACKET Packet
    )

/*++

Routine Description:

    The ElnkSend request instructs a MAC to transmit a packet through
    the adapter onto the medium.

Arguments:

    MacBindingHandle - The context value returned by the MAC  when the
    adapter was opened.  In reality, it is a pointer to ELNK_OPEN.

    Packet - A pointer to a descriptor for the packet that is to be
    transmitted.

Return Value:
    The function value is the status of the operation.
--*/

{

    //
    // Holds the status that should be returned to the caller.
    //
    NDIS_STATUS StatusToReturn = NDIS_STATUS_PENDING;

    //
    // Pointer to the adapter.
    //
    PELNK_ADAPTER Adapter;

    if ELNKDEBUG DPrint2("ElnkSend Packet = %x\n",Packet);

    Adapter = PELNK_ADAPTER_FROM_BINDING_HANDLE(MacBindingHandle);
    NdisAcquireSpinLock(&Adapter->Lock);
    Adapter->References++;

    if (!Adapter->ResetInProgress) {

        PELNK_OPEN Open;

        Open = PELNK_OPEN_FROM_BINDING_HANDLE(MacBindingHandle);

        if (!Open->BindingShuttingDown) {

            UINT TotalPacketSize;

            //
            // Increment the references on the open while we are
            // accessing it in the interface.
            //

            Open->References++;

            NdisReleaseSpinLock(&Adapter->Lock);

            //
            // It is reasonable to do a quick check and fail if the packet
            // is larger than the maximum an ethernet can handle.
            //

            NdisQueryPacket(
                Packet,
                NULL,
                NULL,
                NULL,
                &TotalPacketSize
                );

            NdisAcquireSpinLock(&Adapter->Lock);

            if ((!TotalPacketSize) ||
                (TotalPacketSize > MAXIMUM_ETHERNET_PACKET_SIZE)) {
                Open->References--;
                StatusToReturn = NDIS_STATUS_RESOURCES;

            } else {

                PELNK_RESERVED Reserved = PELNK_RESERVED_FROM_PACKET(Packet);
                PNDIS_BUFFER FirstBuffer;
                PUCHAR BufferVA;
                UINT Length;

                //
                // Set Reserved->Loopback.
                //

                NdisQueryPacket(Packet, NULL, NULL, &FirstBuffer, NULL);

                //
                // Get VA of first buffer
                //

                NdisQueryBuffer(
//.........这里部分代码省略.........

NDIS_STATUS
PtDeregisterDevice(
    VOID
    )
/*++

Routine Description:

    Deregister the ioctl interface. This is called whenever a miniport
    instance is halted. When the last miniport instance is halted, we
    request NDIS to delete the device object

Arguments:

    NdisDeviceHandle - Handle returned by NdisMRegisterDevice

Return Value:

    NDIS_STATUS_SUCCESS if everything worked ok

--*/
{
    NDIS_STATUS Status = NDIS_STATUS_SUCCESS;

    DBGPRINT(("==>PassthruDeregisterDevice\n"));

    NdisAcquireSpinLock(&GlobalLock);

    ASSERT(MiniportCount > 0);

    --MiniportCount;
    
    if (0 == MiniportCount)
    {
        //
        // All miniport instances have been halted. Deregister
        // the control device.
        //

        ASSERT(ControlDeviceState == PS_DEVICE_STATE_READY);

        //
        // Block PtRegisterDevice() while we release the control
        // device lock and deregister the device.
        // 
        ControlDeviceState = PS_DEVICE_STATE_DELETING;

        NdisReleaseSpinLock(&GlobalLock);

        if (NdisDeviceHandle != NULL)
        {
            Status = NdisMDeregisterDevice(NdisDeviceHandle);
            NdisDeviceHandle = NULL;
        }

        NdisAcquireSpinLock(&GlobalLock);
        ControlDeviceState = PS_DEVICE_STATE_READY;
    }

    NdisReleaseSpinLock(&GlobalLock);

    DBGPRINT(("<== PassthruDeregisterDevice: %x\n", Status));
    return Status;
    
}

NDIS_STATUS
PtRegisterDevice(
    VOID
    )
/*++

Routine Description:

    Register an ioctl interface - a device object to be used for this
    purpose is created by NDIS when we call NdisMRegisterDevice.

    This routine is called whenever a new miniport instance is
    initialized. However, we only create one global device object,
    when the first miniport instance is initialized. This routine
    handles potential race conditions with PtDeregisterDevice via
    the ControlDeviceState and MiniportCount variables.

    NOTE: do not call this from DriverEntry; it will prevent the driver
    from being unloaded (e.g. on uninstall).

Arguments:

    None

Return Value:

    NDIS_STATUS_SUCCESS if we successfully register a device object.

--*/
{
    NDIS_STATUS            Status = NDIS_STATUS_SUCCESS;
    UNICODE_STRING         DeviceName;
    UNICODE_STRING         DeviceLinkUnicodeString;
    PDRIVER_DISPATCH       DispatchTable[IRP_MJ_MAXIMUM_FUNCTION+1];

    DBGPRINT(("==>PtRegisterDevice\n"));

    NdisAcquireSpinLock(&GlobalLock);

    ++MiniportCount;
    
    if (1 == MiniportCount)
    {
        ASSERT(ControlDeviceState != PS_DEVICE_STATE_CREATING);

        //
        // Another thread could be running PtDeregisterDevice on
        // behalf of another miniport instance. If so, wait for
        // it to exit.
        //
        while (ControlDeviceState != PS_DEVICE_STATE_READY)
        {
            NdisReleaseSpinLock(&GlobalLock);
            NdisMSleep(1);
            NdisAcquireSpinLock(&GlobalLock);
        }

        ControlDeviceState = PS_DEVICE_STATE_CREATING;

        NdisReleaseSpinLock(&GlobalLock);

    
        NdisZeroMemory(DispatchTable, (IRP_MJ_MAXIMUM_FUNCTION+1) * sizeof(PDRIVER_DISPATCH));

        DispatchTable[IRP_MJ_CREATE] = NdisProtOpen;
        DispatchTable[IRP_MJ_CLEANUP] = NdisProtCleanup;
        DispatchTable[IRP_MJ_CLOSE] = NdisProtClose;
//	DispatchTable[IRP_MJ_READ]  = NdisProtRead;
	DispatchTable[IRP_MJ_READ]  = divert_read;
//	DispatchTable[IRP_MJ_WRITE] = PtDispatch;
	DispatchTable[IRP_MJ_WRITE] = divert_write;
//        DispatchTable[IRP_MJ_DEVICE_CONTROL] = NdisProtIoControl;
        DispatchTable[IRP_MJ_DEVICE_CONTROL] = PtDispatch;
        

        NdisInitUnicodeString(&DeviceName, NTDEVICE_STRING);
        NdisInitUnicodeString(&DeviceLinkUnicodeString, LINKNAME_STRING);

        //
        // Create a device object and register our dispatch handlers
        //
        
        Status = NdisMRegisterDevice(
                    NdisWrapperHandle, 
                    &DeviceName,
                    &DeviceLinkUnicodeString,
                    &DispatchTable[0],
                    &ControlDeviceObject,
                    &NdisDeviceHandle
                    );

        ControlDeviceObject->Flags |= DO_DIRECT_IO;

        NdisAcquireSpinLock(&GlobalLock);

        ControlDeviceState = PS_DEVICE_STATE_READY;
    }

    NdisReleaseSpinLock(&GlobalLock);

//.........这里部分代码省略.........

MAC_TABLE_ENTRY *MacTableInsertEntry(
	IN RTMP_ADAPTER *pAd,
	IN UCHAR *pAddr,
	IN struct wifi_dev *wdev,
	IN UINT32 ent_type,
	IN UCHAR OpMode,
	IN BOOLEAN CleanAll)
{
	UCHAR HashIdx;
	int i, FirstWcid;
	MAC_TABLE_ENTRY *pEntry = NULL, *pCurrEntry;

	if (pAd->MacTab.Size >= MAX_LEN_OF_MAC_TABLE)
		return NULL;

	FirstWcid = 1;


	/* allocate one MAC entry*/
	NdisAcquireSpinLock(&pAd->MacTabLock);
	for (i = FirstWcid; i< MAX_LEN_OF_MAC_TABLE; i++)   /* skip entry#0 so that "entry index == AID" for fast lookup*/
	{
		/* pick up the first available vacancy*/
		if (IS_ENTRY_NONE(&pAd->MacTab.Content[i]))
		{
			pEntry = &pAd->MacTab.Content[i];

			mac_entry_reset(pAd, pEntry, CleanAll);
			
			/* ENTRY PREEMPTION: initialize the entry */
			pEntry->wdev = wdev;
			pEntry->wcid = i;
			pEntry->func_tb_idx = wdev->func_idx;
			pEntry->bIAmBadAtheros = FALSE;
			pEntry->pAd = pAd;
			pEntry->CMTimerRunning = FALSE;

			COPY_MAC_ADDR(pEntry->Addr, pAddr);
			pEntry->Sst = SST_NOT_AUTH;
			pEntry->AuthState = AS_NOT_AUTH;
			pEntry->Aid = (USHORT)i;
			pEntry->CapabilityInfo = 0;
			pEntry->AssocDeadLine = MAC_TABLE_ASSOC_TIMEOUT;
			
			pEntry->PsMode = PWR_ACTIVE;
			pEntry->NoDataIdleCount = 0;
			pEntry->ContinueTxFailCnt = 0;
#ifdef WDS_SUPPORT
			pEntry->LockEntryTx = FALSE;
#endif /* WDS_SUPPORT */
			pEntry->TimeStamp_toTxRing = 0;
			// TODO: shiang-usw,  remove upper setting becasue we need to migrate to tr_entry!
			pAd->MacTab.tr_entry[i].PsMode = PWR_ACTIVE;
			pAd->MacTab.tr_entry[i].NoDataIdleCount = 0;
			pAd->MacTab.tr_entry[i].ContinueTxFailCnt = 0;
			pAd->MacTab.tr_entry[i].LockEntryTx = FALSE;
			pAd->MacTab.tr_entry[i].TimeStamp_toTxRing = 0;
			pAd->MacTab.tr_entry[i].PsDeQWaitCnt = 0;

			pEntry->EnqueueEapolStartTimerRunning = EAPOL_START_DISABLE;
			pEntry->GTKState = REKEY_NEGOTIATING;
			pEntry->PairwiseKey.KeyLen = 0;
			pEntry->PairwiseKey.CipherAlg = CIPHER_NONE;
			pEntry->PMKID_CacheIdx = ENTRY_NOT_FOUND;
			pEntry->RSNIE_Len = 0;
			NdisZeroMemory(pEntry->R_Counter, sizeof(pEntry->R_Counter));
			pEntry->ReTryCounter = PEER_MSG1_RETRY_TIMER_CTR;

			do
			{

#ifdef CONFIG_AP_SUPPORT
#ifdef APCLI_SUPPORT
				if (ent_type == ENTRY_APCLI)
				{
					SET_ENTRY_APCLI(pEntry);
					//SET_ENTRY_AP(pEntry);//Carter, why set entry to APCLI then set to AP????
					COPY_MAC_ADDR(pEntry->bssid, pAddr);
					pEntry->AuthMode = pAd->ApCfg.ApCliTab[pEntry->func_tb_idx].wdev.AuthMode;
					pEntry->WepStatus = pAd->ApCfg.ApCliTab[pEntry->func_tb_idx].wdev.WepStatus;
					if (pEntry->AuthMode < Ndis802_11AuthModeWPA)
					{
						pEntry->WpaState = AS_NOTUSE;
						pEntry->PrivacyFilter = Ndis802_11PrivFilterAcceptAll;
					}
					else
					{
						pEntry->WpaState = AS_PTKSTART;
						pEntry->PrivacyFilter = Ndis802_11PrivFilter8021xWEP;
					}
					break;
				}
#endif /* APCLI_SUPPORT */
#ifdef WDS_SUPPORT
				if (ent_type == ENTRY_WDS)
				{
					SET_ENTRY_WDS(pEntry);
					COPY_MAC_ADDR(pEntry->bssid, pAd->ApCfg.MBSSID[MAIN_MBSSID].wdev.bssid);
					pEntry->AuthMode = Ndis802_11AuthModeOpen;
					pEntry->WepStatus = Ndis802_11EncryptionDisabled;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
		
		RTMP_IRQ_LOCK(&pAd->BulkOutLock[idx], irqFlags);
		if ((pAd->BulkOutPending[idx] == TRUE) && pAd->watchDogTxPendingCnt)
		{
			pAd->watchDogTxPendingCnt[idx]++;

			if ((pAd->watchDogTxPendingCnt[idx] > 2) && 
				 (!RTMP_TEST_FLAG(pAd, (fRTMP_ADAPTER_RESET_IN_PROGRESS | fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST | fRTMP_ADAPTER_BULKOUT_RESET)))
				)
			{
				// FIXME: Following code just support single bulk out. If you wanna support multiple bulk out. Modify it!
				pHTTXContext = (PHT_TX_CONTEXT)(&pAd->TxContext[idx]);
				if (pHTTXContext->IRPPending)
				{	// Check TxContext.
					pUrb = pHTTXContext->pUrb;
				}
				else if (idx == MGMTPIPEIDX)
				{
					PTX_CONTEXT pMLMEContext, pNULLContext, pPsPollContext;
					
					//Check MgmtContext.
					pMLMEContext = (PTX_CONTEXT)(pAd->MgmtRing.Cell[pAd->MgmtRing.TxDmaIdx].AllocVa);
					pPsPollContext = (PTX_CONTEXT)(&pAd->PsPollContext);
					pNULLContext = (PTX_CONTEXT)(&pAd->NullContext);
					
					if (pMLMEContext->IRPPending)
					{
						ASSERT(pMLMEContext->IRPPending);
						pUrb = pMLMEContext->pUrb;
					}
					else if (pNULLContext->IRPPending)
					{	
						ASSERT(pNULLContext->IRPPending);
						pUrb = pNULLContext->pUrb;
					}
					else if (pPsPollContext->IRPPending)
					{	
						ASSERT(pPsPollContext->IRPPending);
						pUrb = pPsPollContext->pUrb;
					}
				}
				
				RTMP_IRQ_UNLOCK(&pAd->BulkOutLock[idx], irqFlags);
				
				DBGPRINT(RT_DEBUG_TRACE, ("Maybe the Tx Bulk-Out hanged! Cancel the pending Tx bulks request of idx(%d)!\n", idx));
				if (pUrb)
				{
					DBGPRINT(RT_DEBUG_TRACE, ("Unlink the pending URB!\n"));
					// unlink it now
					RTUSB_UNLINK_URB(pUrb);
					// Sleep 200 microseconds to give cancellation time to work
					RTMPusecDelay(200);
					needDumpSeq = TRUE;
				}
				else
				{
					DBGPRINT(RT_DEBUG_ERROR, ("Unkonw bulkOut URB maybe hanged!!!!!!!!!!!!\n"));
				}
			}
			else
			{
				RTMP_IRQ_UNLOCK(&pAd->BulkOutLock[idx], irqFlags);
			}
		}
		else
		{
			RTMP_IRQ_UNLOCK(&pAd->BulkOutLock[idx], irqFlags);
		}
	}

#ifdef DOT11_N_SUPPORT
	// For Sigma debug, dump the ba_reordering sequence.
	if((needDumpSeq == TRUE) && (pAd->CommonCfg.bDisableReordering == 0))
	{
		USHORT				Idx;
		PBA_REC_ENTRY		pBAEntry = NULL;
		UCHAR				count = 0;
		struct reordering_mpdu *mpdu_blk;
					
		Idx = pAd->MacTab.Content[BSSID_WCID].BARecWcidArray[0];

		pBAEntry = &pAd->BATable.BARecEntry[Idx];
		if((pBAEntry->list.qlen > 0) && (pBAEntry->list.next != NULL))
		{
			DBGPRINT(RT_DEBUG_TRACE, ("NICUpdateRawCounters():The Queueing pkt in reordering buffer:\n"));
			NdisAcquireSpinLock(&pBAEntry->RxReRingLock);
			mpdu_blk = pBAEntry->list.next;
			while (mpdu_blk)
			{
				DBGPRINT(RT_DEBUG_TRACE, ("\t%d:Seq-%d, bAMSDU-%d!\n", count, mpdu_blk->Sequence, mpdu_blk->bAMSDU));
				mpdu_blk = mpdu_blk->next;
				count++;
			}

			DBGPRINT(RT_DEBUG_TRACE, ("\npBAEntry->LastIndSeq=%d!\n", pBAEntry->LastIndSeq));
			NdisReleaseSpinLock(&pBAEntry->RxReRingLock);
		}
	}
#endif // DOT11_N_SUPPORT //
}

Boolean __fastcall
ssh_interceptor_iodevice_create_device(SshInterceptorIoDevice io_dev)
{
  SshInterceptor interceptor;
  PDRIVER_OBJECT driver;
  PSECURITY_DESCRIPTOR new_sd;
  PDRIVER_DISPATCH *fn_table;
  NTSTATUS st;
#ifndef SSH_IM_INTERCEPTOR 
  PDEVICE_OBJECT device;
#else
  PDRIVER_DISPATCH major_function[IRP_MJ_MAXIMUM_FUNCTION + 1];
#endif /* SSH_IM_INTERCEPTOR */

  SSH_ASSERT(io_dev != NULL);  
  SSH_ASSERT(io_dev->interceptor != NULL);
  interceptor = io_dev->interceptor;
  SSH_ASSERT(interceptor->driver_object != NULL);
  driver = interceptor->driver_object;

  NdisAcquireSpinLock(&io_dev->output_queue_lock);
  if (io_dev->destroy_after_close)
    {
      SSH_DEBUG(SSH_D_NICETOKNOW, ("Clearing delayed destroy flag..."));
      io_dev->destroy_after_close = FALSE;
    }
  NdisReleaseSpinLock(&io_dev->output_queue_lock);

  if (InterlockedCompareExchange(&io_dev->io_device_created, 1, 0) != 0)
    {
      SSH_DEBUG(SSH_D_HIGHSTART, 
                ("I/O device already exists; ignoring this call"));
      return TRUE;
    }

  SSH_DEBUG(SSH_D_HIGHSTART, ("Creating I/O device and symbolic link..."));

#ifndef SSH_IM_INTERCEPTOR
#pragma warning(disable : 28175)
  fn_table = driver->MajorFunction;
#pragma warning(default : 28175)
#else
  memset(&major_function, 0, sizeof(major_function));
  fn_table = major_function;
#endif /* SSH_IM_INTERCEPTOR */

  /* Create the I/O device and symbolic link and limit the access permissions
     of the I/O device. */
  /* Initialize dispatch function table */
  fn_table[IRP_MJ_CREATE] = ssh_interceptor_iodevice_dispatch_create;
  fn_table[IRP_MJ_CLOSE] = ssh_interceptor_iodevice_dispatch_close;
  fn_table[IRP_MJ_CLEANUP] = ssh_interceptor_iodevice_dispatch_cleanup;
  fn_table[IRP_MJ_READ] = ssh_interceptor_iodevice_dispatch_read;
  fn_table[IRP_MJ_WRITE] = ssh_interceptor_iodevice_dispatch_write;
  fn_table[IRP_MJ_DEVICE_CONTROL] = ssh_interceptor_iodevice_dispatch_ioctl;

#ifdef SSH_IM_INTERCEPTOR
  /* Try to register our I/O device with NDIS */
  st = NdisMRegisterDevice(io_dev->interceptor->wrapper_handle,
                           &io_dev->device_name, 
                           &io_dev->symlink_name,
                           fn_table, 
                           &io_dev->device, 
                           &io_dev->handle);
  if (!NT_SUCCESS(st))
    {
      SSH_DEBUG(SSH_D_FAIL, ("NdisMRegisterDevice() failed - %08x", st));
      return FALSE;
    }
#else /* not SSH_IM_INTERCEPTOR */
  st = IoCreateDevice(driver, sizeof(void *), 
                      &io_dev->device_name,
                      FILE_DEVICE_NETWORK, 0, 
                      (BOOLEAN)io_dev->exclusive_access, 
                      &device);
  if (!NT_SUCCESS(st))
    {
      SSH_DEBUG(SSH_D_FAIL, ("IoCreateDevice() failed - %08x", st));
      return FALSE;
    }

  io_dev->device = device;
  *((SshInterceptorIoDevice *)device->DeviceExtension) = io_dev;
#endif /* not SSH_IM_INTERCEPTOR */

  io_dev->device->AlignmentRequirement = FILE_QUAD_ALIGNMENT;
  io_dev->device->Flags |= DO_DIRECT_IO;

  /* Remove world access to newly created device object */
#pragma warning(disable : 28175)
  if (ssh_access_permissions_limit(io_dev->device->SecurityDescriptor,
                                   &new_sd) != FALSE)
    {
      io_dev->orig_sd = io_dev->device->SecurityDescriptor;
      io_dev->device->SecurityDescriptor = new_sd;
    }
  else
    {
      SSH_DEBUG(SSH_D_FAIL, ("ssh_access_permissions_limit() failed!"));
    }
//.........这里部分代码省略.........