| /** @file | |
| Copyright (c) 2006, Intel Corporation | |
| All rights reserved. This program and the accompanying materials | |
| are licensed and made available under the terms and conditions of the BSD License | |
| which accompanies this distribution. The full text of the license may be found at | |
| http://opensource.org/licenses/bsd-license.php | |
| THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| Module Name: | |
| ArpDriver.c | |
| Abstract: | |
| **/ | |
| #include "ArpDriver.h" | |
| #include "ArpImpl.h" | |
| EFI_DRIVER_BINDING_PROTOCOL gArpDriverBinding = { | |
| ArpDriverBindingSupported, | |
| ArpDriverBindingStart, | |
| ArpDriverBindingStop, | |
| 0xa, | |
| NULL, | |
| NULL | |
| }; | |
| /** | |
| Create and initialize the arp service context data. | |
| @param ImageHandle The image handle representing the loaded driver | |
| image. | |
| @param ControllerHandle The controller handle the driver binds to. | |
| @param ArpService Pointer to the buffer containing the arp service | |
| context data. | |
| @retval EFI_SUCCESS The arp service context is initialized. | |
| @retval other Failed to initialize the arp service context. | |
| **/ | |
| STATIC | |
| EFI_STATUS | |
| ArpCreateService ( | |
| IN EFI_HANDLE ImageHandle, | |
| IN EFI_HANDLE ControllerHandle, | |
| IN ARP_SERVICE_DATA *ArpService | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| ASSERT (ArpService != NULL); | |
| ArpService->Signature = ARP_SERVICE_DATA_SIGNATURE; | |
| // | |
| // Init the servicebinding protocol members. | |
| // | |
| ArpService->ServiceBinding.CreateChild = ArpServiceBindingCreateChild; | |
| ArpService->ServiceBinding.DestroyChild = ArpServiceBindingDestroyChild; | |
| // | |
| // Save the handles. | |
| // | |
| ArpService->ImageHandle = ImageHandle; | |
| ArpService->ControllerHandle = ControllerHandle; | |
| // | |
| // Create a MNP child instance. | |
| // | |
| Status = NetLibCreateServiceChild ( | |
| ControllerHandle, | |
| ImageHandle, | |
| &gEfiManagedNetworkServiceBindingProtocolGuid, | |
| &ArpService->MnpChildHandle | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| // | |
| // Open the MNP protocol. | |
| // | |
| Status = gBS->OpenProtocol ( | |
| ArpService->MnpChildHandle, | |
| &gEfiManagedNetworkProtocolGuid, | |
| (VOID **)&ArpService->Mnp, | |
| ImageHandle, | |
| ControllerHandle, | |
| EFI_OPEN_PROTOCOL_BY_DRIVER | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR_EXIT; | |
| } | |
| // | |
| // Get the underlayer Snp mode data. | |
| // | |
| Status = ArpService->Mnp->GetModeData (ArpService->Mnp, NULL, &ArpService->SnpMode); | |
| if ((Status != EFI_NOT_STARTED) && EFI_ERROR (Status)) { | |
| goto ERROR_EXIT; | |
| } | |
| if (ArpService->SnpMode.IfType != NET_IFTYPE_ETHERNET) { | |
| // | |
| // Only support the ethernet. | |
| // | |
| Status = EFI_UNSUPPORTED; | |
| goto ERROR_EXIT; | |
| } | |
| // | |
| // Set the Mnp config parameters. | |
| // | |
| ArpService->MnpConfigData.ReceivedQueueTimeoutValue = 0; | |
| ArpService->MnpConfigData.TransmitQueueTimeoutValue = 0; | |
| ArpService->MnpConfigData.ProtocolTypeFilter = ARP_ETHER_PROTO_TYPE; | |
| ArpService->MnpConfigData.EnableUnicastReceive = TRUE; | |
| ArpService->MnpConfigData.EnableMulticastReceive = FALSE; | |
| ArpService->MnpConfigData.EnableBroadcastReceive = TRUE; | |
| ArpService->MnpConfigData.EnablePromiscuousReceive = FALSE; | |
| ArpService->MnpConfigData.FlushQueuesOnReset = TRUE; | |
| ArpService->MnpConfigData.EnableReceiveTimestamps = FALSE; | |
| ArpService->MnpConfigData.DisableBackgroundPolling = FALSE; | |
| // | |
| // Configure the Mnp child. | |
| // | |
| Status = ArpService->Mnp->Configure (ArpService->Mnp, &ArpService->MnpConfigData); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR_EXIT; | |
| } | |
| // | |
| // Create the event used in the RxToken. | |
| // | |
| Status = gBS->CreateEvent ( | |
| EVT_NOTIFY_SIGNAL, | |
| NET_TPL_EVENT, | |
| ArpOnFrameRcvd, | |
| ArpService, | |
| &ArpService->RxToken.Event | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR_EXIT; | |
| } | |
| // | |
| // Create the Arp heartbeat timer. | |
| // | |
| Status = gBS->CreateEvent ( | |
| EVT_NOTIFY_SIGNAL | EVT_TIMER, | |
| NET_TPL_TIMER, | |
| ArpTimerHandler, | |
| ArpService, | |
| &ArpService->PeriodicTimer | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR_EXIT; | |
| } | |
| // | |
| // Start the heartbeat timer. | |
| // | |
| Status = gBS->SetTimer ( | |
| ArpService->PeriodicTimer, | |
| TimerPeriodic, | |
| ARP_PERIODIC_TIMER_INTERVAL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR_EXIT; | |
| } | |
| // | |
| // Init the lock. | |
| // | |
| NET_LOCK_INIT (&ArpService->Lock); | |
| // | |
| // Init the lists. | |
| // | |
| NetListInit (&ArpService->ChildrenList); | |
| NetListInit (&ArpService->PendingRequestTable); | |
| NetListInit (&ArpService->DeniedCacheTable); | |
| NetListInit (&ArpService->ResolvedCacheTable); | |
| ERROR_EXIT: | |
| return Status; | |
| } | |
| /** | |
| Clean the arp service context data. | |
| @param ArpService Pointer to the buffer containing the arp service | |
| context data. | |
| @return None. | |
| **/ | |
| STATIC | |
| VOID | |
| ArpCleanService ( | |
| IN ARP_SERVICE_DATA *ArpService | |
| ) | |
| { | |
| NET_CHECK_SIGNATURE (ArpService, ARP_SERVICE_DATA_SIGNATURE); | |
| if (ArpService->PeriodicTimer != NULL) { | |
| // | |
| // Cancle and close the PeriodicTimer. | |
| // | |
| gBS->SetTimer (ArpService->PeriodicTimer, TimerCancel, 0); | |
| gBS->CloseEvent (ArpService->PeriodicTimer); | |
| } | |
| if (ArpService->RxToken.Event != NULL) { | |
| // | |
| // Cancle the RxToken and close the event in the RxToken. | |
| // | |
| ArpService->Mnp->Cancel (ArpService->Mnp, NULL); | |
| gBS->CloseEvent (ArpService->RxToken.Event); | |
| } | |
| if (ArpService->Mnp != NULL) { | |
| // | |
| // Reset the Mnp child and close the Mnp protocol. | |
| // | |
| ArpService->Mnp->Configure (ArpService->Mnp, NULL); | |
| gBS->CloseProtocol ( | |
| ArpService->MnpChildHandle, | |
| &gEfiManagedNetworkProtocolGuid, | |
| ArpService->ImageHandle, | |
| ArpService->ControllerHandle | |
| ); | |
| } | |
| if (ArpService->MnpChildHandle != NULL) { | |
| // | |
| // Destroy the mnp child. | |
| // | |
| NetLibDestroyServiceChild( | |
| ArpService->ControllerHandle, | |
| ArpService->ImageHandle, | |
| &gEfiManagedNetworkServiceBindingProtocolGuid, | |
| ArpService->MnpChildHandle | |
| ); | |
| } | |
| } | |
| /** | |
| Test to see if this driver supports ControllerHandle. | |
| @param This Protocol instance pointer. | |
| @param ControllerHandle Handle of device to test. | |
| @param RemainingDevicePath Optional parameter use to pick a specific child | |
| device to start. | |
| @retval EFI_SUCCES This driver supports this device | |
| @retval EFI_ALREADY_STARTED This driver is already running on this device. | |
| @retval other This driver does not support this device. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| ArpDriverBindingSupported ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE ControllerHandle, | |
| IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| // | |
| // Test to see if Arp SB is already installed. | |
| // | |
| Status = gBS->OpenProtocol ( | |
| ControllerHandle, | |
| &gEfiArpServiceBindingProtocolGuid, | |
| NULL, | |
| This->DriverBindingHandle, | |
| ControllerHandle, | |
| EFI_OPEN_PROTOCOL_TEST_PROTOCOL | |
| ); | |
| if (Status == EFI_SUCCESS) { | |
| return EFI_ALREADY_STARTED; | |
| } | |
| // | |
| // Test to see if MNP SB is installed. | |
| // | |
| Status = gBS->OpenProtocol ( | |
| ControllerHandle, | |
| &gEfiManagedNetworkServiceBindingProtocolGuid, | |
| NULL, | |
| This->DriverBindingHandle, | |
| ControllerHandle, | |
| EFI_OPEN_PROTOCOL_TEST_PROTOCOL | |
| ); | |
| return Status; | |
| } | |
| /** | |
| Start this driver on ControllerHandle. | |
| @param This Protocol instance pointer. | |
| @param ControllerHandle Handle of device to bind driver to | |
| @param RemainingDevicePath Optional parameter use to pick a specific child | |
| device to start. | |
| @retval EFI_SUCCES This driver is added to ControllerHandle | |
| @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle | |
| @retval other This driver does not support this device | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| ArpDriverBindingStart ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE ControllerHandle, | |
| IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| ARP_SERVICE_DATA *ArpService; | |
| // | |
| // Allocate a zero pool for ArpService. | |
| // | |
| ArpService = NetAllocateZeroPool (sizeof(ARP_SERVICE_DATA)); | |
| if (ArpService == NULL) { | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| // | |
| // Initialize the arp service context data. | |
| // | |
| Status = ArpCreateService (This->DriverBindingHandle, ControllerHandle, ArpService); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR; | |
| } | |
| // | |
| // Install the ARP service binding protocol. | |
| // | |
| Status = gBS->InstallMultipleProtocolInterfaces ( | |
| &ControllerHandle, | |
| &gEfiArpServiceBindingProtocolGuid, | |
| &ArpService->ServiceBinding, | |
| NULL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR; | |
| } | |
| // | |
| // OK, start to receive arp packets from Mnp. | |
| // | |
| Status = ArpService->Mnp->Receive (ArpService->Mnp, &ArpService->RxToken); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR; | |
| } | |
| return Status; | |
| ERROR: | |
| // | |
| // On error, clean the arp service context data, and free the memory allocated. | |
| // | |
| ArpCleanService (ArpService); | |
| NetFreePool (ArpService); | |
| return Status; | |
| } | |
| /** | |
| Stop this driver on ControllerHandle. | |
| @param This Protocol instance pointer. | |
| @param ControllerHandle Handle of device to stop driver on | |
| @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number | |
| of children is zero stop the entire bus driver. | |
| @param ChildHandleBuffer List of Child Handles to Stop. | |
| @retval EFI_SUCCES This driver is removed ControllerHandle | |
| @retval other This driver was not removed from this device | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| ArpDriverBindingStop ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE ControllerHandle, | |
| IN UINTN NumberOfChildren, | |
| IN EFI_HANDLE *ChildHandleBuffer | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_HANDLE NicHandle; | |
| EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding; | |
| ARP_SERVICE_DATA *ArpService; | |
| ARP_INSTANCE_DATA *Instance; | |
| // | |
| // Get the NicHandle which the arp servicebinding is installed on. | |
| // | |
| NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiManagedNetworkProtocolGuid); | |
| if (NicHandle == NULL) { | |
| return EFI_SUCCESS; | |
| } | |
| // | |
| // Try to get the arp servicebinding protocol on the NicHandle. | |
| // | |
| Status = gBS->OpenProtocol ( | |
| NicHandle, | |
| &gEfiArpServiceBindingProtocolGuid, | |
| (VOID **)&ServiceBinding, | |
| This->DriverBindingHandle, | |
| ControllerHandle, | |
| EFI_OPEN_PROTOCOL_GET_PROTOCOL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| ARP_DEBUG_ERROR (("ArpDriverBindingStop: Open ArpSb failed, %r.\n", Status)); | |
| return Status; | |
| } | |
| ArpService = ARP_SERVICE_DATA_FROM_THIS (ServiceBinding); | |
| while (!NetListIsEmpty (&ArpService->ChildrenList)) { | |
| // | |
| // Iterate all the instances. | |
| // | |
| Instance = NET_LIST_HEAD (&ArpService->ChildrenList, ARP_INSTANCE_DATA, List); | |
| // | |
| // Destroy this arp child. | |
| // | |
| ServiceBinding->DestroyChild (ServiceBinding, Instance->Handle); | |
| } | |
| ASSERT (NetListIsEmpty (&ArpService->PendingRequestTable)); | |
| ASSERT (NetListIsEmpty (&ArpService->DeniedCacheTable)); | |
| ASSERT (NetListIsEmpty (&ArpService->ResolvedCacheTable)); | |
| // | |
| // Uninstall the ARP ServiceBinding protocol. | |
| // | |
| Status = gBS->UninstallMultipleProtocolInterfaces ( | |
| NicHandle, | |
| &gEfiArpServiceBindingProtocolGuid, | |
| &ArpService->ServiceBinding, | |
| NULL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| ARP_DEBUG_ERROR (("ArpDriverBindingStop: Failed to uninstall ArpSb, %r.\n", Status)); | |
| return Status; | |
| } | |
| // | |
| // Clean the arp servicebinding context data and free the memory allocated. | |
| // | |
| ArpCleanService (ArpService); | |
| NetFreePool (ArpService); | |
| return Status; | |
| } | |
| /** | |
| Creates a child handle with a set of I/O services. | |
| @param This Protocol instance pointer. | |
| @param ChildHandle Pointer to the handle of the child to create. If | |
| it is NULL, then a new handle is created. If it is | |
| not NULL, then the I/O services are added to the | |
| existing child handle. | |
| @retval EFI_SUCCES The child handle was created with the I/O | |
| services. | |
| @retval EFI_OUT_OF_RESOURCES There are not enough resources availabe to create | |
| the child. | |
| @retval other The child handle was not created. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| ArpServiceBindingCreateChild ( | |
| IN EFI_SERVICE_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE *ChildHandle | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| ARP_SERVICE_DATA *ArpService; | |
| ARP_INSTANCE_DATA *Instance; | |
| VOID *Mnp; | |
| if ((This == NULL) || (ChildHandle == NULL)) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| ArpService = ARP_SERVICE_DATA_FROM_THIS (This); | |
| // | |
| // Allocate memory for the instance context data. | |
| // | |
| Instance = NetAllocateZeroPool (sizeof(ARP_INSTANCE_DATA)); | |
| if (Instance == NULL) { | |
| ARP_DEBUG_ERROR (("ArpSBCreateChild: Failed to allocate memory for Instance.\n")); | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| // | |
| // Init the instance context data. | |
| // | |
| ArpInitInstance (ArpService, Instance); | |
| // | |
| // Install the ARP protocol onto the ChildHandle. | |
| // | |
| Status = gBS->InstallMultipleProtocolInterfaces ( | |
| ChildHandle, | |
| &gEfiArpProtocolGuid, | |
| (VOID *)&Instance->ArpProto, | |
| NULL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| ARP_DEBUG_ERROR (("ArpSBCreateChild: faild to install ARP protocol, %r.\n", Status)); | |
| NetFreePool (Instance); | |
| return Status; | |
| } | |
| // | |
| // Save the ChildHandle. | |
| // | |
| Instance->Handle = *ChildHandle; | |
| // | |
| // Open the Managed Network protocol BY_CHILD. | |
| // | |
| Status = gBS->OpenProtocol ( | |
| ArpService->MnpChildHandle, | |
| &gEfiManagedNetworkProtocolGuid, | |
| (VOID **) &Mnp, | |
| gArpDriverBinding.DriverBindingHandle, | |
| Instance->Handle, | |
| EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ERROR; | |
| } | |
| if (EFI_ERROR (NET_TRYLOCK (&ArpService->Lock))) { | |
| Status = EFI_ACCESS_DENIED; | |
| goto ERROR; | |
| } | |
| // | |
| // Insert the instance into children list managed by the arp service context data. | |
| // | |
| NetListInsertTail (&ArpService->ChildrenList, &Instance->List); | |
| ArpService->ChildrenNumber++; | |
| NET_UNLOCK (&ArpService->Lock); | |
| ERROR: | |
| if (EFI_ERROR (Status)) { | |
| gBS->CloseProtocol ( | |
| ArpService->MnpChildHandle, | |
| &gEfiManagedNetworkProtocolGuid, | |
| gArpDriverBinding.DriverBindingHandle, | |
| Instance->Handle | |
| ); | |
| gBS->UninstallMultipleProtocolInterfaces ( | |
| Instance->Handle, | |
| &gEfiArpProtocolGuid, | |
| &Instance->ArpProto, | |
| NULL | |
| ); | |
| // | |
| // Free the allocated memory. | |
| // | |
| NetFreePool (Instance); | |
| } | |
| return Status; | |
| } | |
| /** | |
| Destroys a child handle with a set of I/O services. | |
| @param This Protocol instance pointer. | |
| @param ChildHandle Handle of the child to destroy. | |
| @retval EFI_SUCCES The I/O services were removed from the child | |
| handle. | |
| @retval EFI_UNSUPPORTED The child handle does not support the I/O services | |
| that are being removed. | |
| @retval EFI_INVALID_PARAMETER Child handle is not a valid EFI Handle. | |
| @retval EFI_ACCESS_DENIED The child handle could not be destroyed because | |
| its I/O services are being used. | |
| @retval other The child handle was not destroyed. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| ArpServiceBindingDestroyChild ( | |
| IN EFI_SERVICE_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE ChildHandle | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| ARP_SERVICE_DATA *ArpService; | |
| ARP_INSTANCE_DATA *Instance; | |
| EFI_ARP_PROTOCOL *Arp; | |
| if ((This == NULL) || (ChildHandle == NULL)) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| ArpService = ARP_SERVICE_DATA_FROM_THIS (This); | |
| // | |
| // Get the arp protocol. | |
| // | |
| Status = gBS->OpenProtocol ( | |
| ChildHandle, | |
| &gEfiArpProtocolGuid, | |
| (VOID **)&Arp, | |
| ArpService->ImageHandle, | |
| ChildHandle, | |
| EFI_OPEN_PROTOCOL_GET_PROTOCOL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return EFI_UNSUPPORTED; | |
| } | |
| Instance = ARP_INSTANCE_DATA_FROM_THIS (Arp); | |
| if (Instance->Destroyed) { | |
| return EFI_SUCCESS; | |
| } | |
| // | |
| // Use the Destroyed as a flag to avoid re-entrance. | |
| // | |
| Instance->Destroyed = TRUE; | |
| // | |
| // Close the Managed Network protocol. | |
| // | |
| gBS->CloseProtocol ( | |
| ArpService->MnpChildHandle, | |
| &gEfiManagedNetworkProtocolGuid, | |
| gArpDriverBinding.DriverBindingHandle, | |
| ChildHandle | |
| ); | |
| // | |
| // Uninstall the ARP protocol. | |
| // | |
| Status = gBS->UninstallMultipleProtocolInterfaces ( | |
| ChildHandle, | |
| &gEfiArpProtocolGuid, | |
| &Instance->ArpProto, | |
| NULL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| ARP_DEBUG_ERROR (("ArpSBDestroyChild: Failed to uninstall the arp protocol, %r.\n", | |
| Status)); | |
| Instance->Destroyed = FALSE; | |
| return Status; | |
| } | |
| if (EFI_ERROR (NET_TRYLOCK (&ArpService->Lock))) { | |
| Instance->Destroyed = FALSE; | |
| return EFI_ACCESS_DENIED; | |
| } | |
| if (Instance->Configured) { | |
| // | |
| // Delete the related cache entry. | |
| // | |
| ArpDeleteCacheEntry (Instance, FALSE, NULL, TRUE); | |
| // | |
| // Reset the instance configuration. | |
| // | |
| ArpConfigureInstance (Instance, NULL); | |
| } | |
| // | |
| // Remove this instance from the ChildrenList. | |
| // | |
| NetListRemoveEntry (&Instance->List); | |
| ArpService->ChildrenNumber--; | |
| NET_UNLOCK (&ArpService->Lock); | |
| NetFreePool (Instance); | |
| return Status; | |
| } | |
| EFI_STATUS | |
| EFIAPI | |
| ArpDriverEntryPoint ( | |
| IN EFI_HANDLE ImageHandle, | |
| IN EFI_SYSTEM_TABLE *SystemTable | |
| ) | |
| /*++ | |
| Routine Description: | |
| The entry point for Arp driver which installs the driver binding and component name | |
| protocol on its ImageHandle. | |
| Arguments: | |
| ImageHandle - The image handle of the driver. | |
| SystemTable - The system table. | |
| Returns: | |
| EFI_SUCCESS - if the driver binding and component name protocols are successfully | |
| installed, otherwise if failed. | |
| --*/ | |
| { | |
| return NetLibInstallAllDriverProtocols ( | |
| ImageHandle, | |
| SystemTable, | |
| &gArpDriverBinding, | |
| ImageHandle, | |
| &gArpComponentName, | |
| NULL, | |
| NULL | |
| ); | |
| } | |