| /** @file | |
| Driver Binding functions and Service Binding functions | |
| implementation for Dhcp6 Driver. | |
| Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR> | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #include "Dhcp6Impl.h" | |
| EFI_DRIVER_BINDING_PROTOCOL gDhcp6DriverBinding = { | |
| Dhcp6DriverBindingSupported, | |
| Dhcp6DriverBindingStart, | |
| Dhcp6DriverBindingStop, | |
| 0xa, | |
| NULL, | |
| NULL | |
| }; | |
| EFI_SERVICE_BINDING_PROTOCOL gDhcp6ServiceBindingTemplate = { | |
| Dhcp6ServiceBindingCreateChild, | |
| Dhcp6ServiceBindingDestroyChild | |
| }; | |
| /** | |
| Configure the default Udp6Io to receive all the DHCP6 traffic | |
| on this network interface. | |
| @param[in] UdpIo The pointer to Udp6Io to be configured. | |
| @param[in] Context The pointer to the context. | |
| @retval EFI_SUCCESS The Udp6Io is successfully configured. | |
| @retval Others Failed to configure the Udp6Io. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| Dhcp6ConfigureUdpIo ( | |
| IN UDP_IO *UdpIo, | |
| IN VOID *Context | |
| ) | |
| { | |
| EFI_UDP6_PROTOCOL *Udp6; | |
| EFI_UDP6_CONFIG_DATA *Config; | |
| Udp6 = UdpIo->Protocol.Udp6; | |
| Config = &(UdpIo->Config.Udp6); | |
| ZeroMem (Config, sizeof (EFI_UDP6_CONFIG_DATA)); | |
| // | |
| // Set Udp6 configure data for the Dhcp6 instance. | |
| // | |
| Config->AcceptPromiscuous = FALSE; | |
| Config->AcceptAnyPort = FALSE; | |
| Config->AllowDuplicatePort = FALSE; | |
| Config->TrafficClass = 0; | |
| Config->HopLimit = 128; | |
| Config->ReceiveTimeout = 0; | |
| Config->TransmitTimeout = 0; | |
| // | |
| // Configure an endpoint of client(0, 546), server(0, 0), the addresses | |
| // will be overridden later. Note that we MUST not limit RemotePort. | |
| // More details, refer to RFC 3315 section 5.2. | |
| // | |
| Config->StationPort = DHCP6_PORT_CLIENT; | |
| Config->RemotePort = 0; | |
| return Udp6->Configure (Udp6, Config);; | |
| } | |
| /** | |
| Destroy the Dhcp6 service. The Dhcp6 service may be partly initialized, | |
| or partly destroyed. If a resource is destroyed, it is marked as such in | |
| case the destroy failed and being called again later. | |
| @param[in, out] Service The pointer to Dhcp6 service to be destroyed. | |
| **/ | |
| VOID | |
| Dhcp6DestroyService ( | |
| IN OUT DHCP6_SERVICE *Service | |
| ) | |
| { | |
| // | |
| // All children instances should have been already destroyed here. | |
| // | |
| ASSERT (Service->NumOfChild == 0); | |
| if (Service->ClientId != NULL) { | |
| FreePool (Service->ClientId); | |
| } | |
| if (Service->UdpIo != NULL) { | |
| UdpIoFreeIo (Service->UdpIo); | |
| } | |
| FreePool (Service); | |
| } | |
| /** | |
| Create a new Dhcp6 service for the Nic controller. | |
| @param[in] Controller The controller to be installed DHCP6 service | |
| binding protocol. | |
| @param[in] ImageHandle The image handle of the Dhcp6 driver. | |
| @param[out] Service The return pointer of the new Dhcp6 service. | |
| @retval EFI_SUCCESS The Dhcp6 service is created successfully. | |
| @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. | |
| @retval EFI_OUT_OF_RESOURCES Failed to allocate resource. | |
| **/ | |
| EFI_STATUS | |
| Dhcp6CreateService ( | |
| IN EFI_HANDLE Controller, | |
| IN EFI_HANDLE ImageHandle, | |
| OUT DHCP6_SERVICE **Service | |
| ) | |
| { | |
| DHCP6_SERVICE *Dhcp6Srv; | |
| EFI_STATUS Status; | |
| *Service = NULL; | |
| Dhcp6Srv = AllocateZeroPool (sizeof (DHCP6_SERVICE)); | |
| if (Dhcp6Srv == NULL) { | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| // | |
| // Open the SNP protocol to get mode data later. | |
| // | |
| Dhcp6Srv->Snp = NULL; | |
| NetLibGetSnpHandle (Controller, &Dhcp6Srv->Snp); | |
| if (Dhcp6Srv->Snp == NULL) { | |
| FreePool (Dhcp6Srv); | |
| return EFI_DEVICE_ERROR; | |
| } | |
| // | |
| // Initialize the fields of the new Dhcp6 service. | |
| // | |
| Dhcp6Srv->Signature = DHCP6_SERVICE_SIGNATURE; | |
| Dhcp6Srv->Controller = Controller; | |
| Dhcp6Srv->Image = ImageHandle; | |
| Dhcp6Srv->Xid = (0xffffff & NET_RANDOM (NetRandomInitSeed ())); | |
| CopyMem ( | |
| &Dhcp6Srv->ServiceBinding, | |
| &gDhcp6ServiceBindingTemplate, | |
| sizeof (EFI_SERVICE_BINDING_PROTOCOL) | |
| ); | |
| // | |
| // Locate Ip6->Ip6Config and store it for get IP6 Duplicate Address Detection transmits. | |
| // | |
| Status = gBS->HandleProtocol ( | |
| Controller, | |
| &gEfiIp6ConfigProtocolGuid, | |
| (VOID **) &Dhcp6Srv->Ip6Cfg | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| FreePool (Dhcp6Srv); | |
| return Status; | |
| } | |
| // | |
| // Generate client Duid: If SMBIOS system UUID is located, generate DUID in DUID-UUID format. | |
| // Otherwise, in DUID-LLT format. | |
| // | |
| Dhcp6Srv->ClientId = Dhcp6GenerateClientId (Dhcp6Srv->Snp->Mode); | |
| if (Dhcp6Srv->ClientId == NULL) { | |
| FreePool (Dhcp6Srv); | |
| return EFI_DEVICE_ERROR; | |
| } | |
| // | |
| // Create an Udp6Io for stateful transmit/receive of each Dhcp6 instance. | |
| // | |
| Dhcp6Srv->UdpIo = UdpIoCreateIo ( | |
| Controller, | |
| ImageHandle, | |
| Dhcp6ConfigureUdpIo, | |
| UDP_IO_UDP6_VERSION, | |
| NULL | |
| ); | |
| if (Dhcp6Srv->UdpIo == NULL) { | |
| FreePool (Dhcp6Srv->ClientId); | |
| FreePool (Dhcp6Srv); | |
| return EFI_DEVICE_ERROR; | |
| } | |
| InitializeListHead (&Dhcp6Srv->Child); | |
| *Service = Dhcp6Srv; | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Destroy the Dhcp6 instance and recycle the resources. | |
| @param[in, out] Instance The pointer to the Dhcp6 instance. | |
| **/ | |
| VOID | |
| Dhcp6DestroyInstance ( | |
| IN OUT DHCP6_INSTANCE *Instance | |
| ) | |
| { | |
| // | |
| // Clean up the retry list first. | |
| // | |
| Dhcp6CleanupRetry (Instance, DHCP6_PACKET_ALL); | |
| gBS->CloseEvent (Instance->Timer); | |
| // | |
| // Clean up the current configure data. | |
| // | |
| if (Instance->Config != NULL) { | |
| Dhcp6CleanupConfigData (Instance->Config); | |
| FreePool (Instance->Config); | |
| } | |
| // | |
| // Clean up the current Ia. | |
| // | |
| if (Instance->IaCb.Ia != NULL) { | |
| if (Instance->IaCb.Ia->ReplyPacket != NULL) { | |
| FreePool (Instance->IaCb.Ia->ReplyPacket); | |
| } | |
| FreePool (Instance->IaCb.Ia); | |
| } | |
| if (Instance->Unicast != NULL) { | |
| FreePool (Instance->Unicast); | |
| } | |
| if (Instance->AdSelect != NULL) { | |
| FreePool (Instance->AdSelect); | |
| } | |
| FreePool (Instance); | |
| } | |
| /** | |
| Create the Dhcp6 instance and initialize it. | |
| @param[in] Service The pointer to the Dhcp6 service. | |
| @param[out] Instance The pointer to the Dhcp6 instance. | |
| @retval EFI_SUCCESS The Dhcp6 instance is created. | |
| @retval EFI_OUT_OF_RESOURCES Failed to allocate resources. | |
| **/ | |
| EFI_STATUS | |
| Dhcp6CreateInstance ( | |
| IN DHCP6_SERVICE *Service, | |
| OUT DHCP6_INSTANCE **Instance | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| DHCP6_INSTANCE *Dhcp6Ins; | |
| *Instance = NULL; | |
| Dhcp6Ins = AllocateZeroPool (sizeof (DHCP6_INSTANCE)); | |
| if (Dhcp6Ins == NULL) { | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| // | |
| // Initialize the fields of the new Dhcp6 instance. | |
| // | |
| Dhcp6Ins->Signature = DHCP6_INSTANCE_SIGNATURE; | |
| Dhcp6Ins->UdpSts = EFI_ALREADY_STARTED; | |
| Dhcp6Ins->Service = Service; | |
| Dhcp6Ins->InDestroy = FALSE; | |
| Dhcp6Ins->MediaPresent = TRUE; | |
| CopyMem ( | |
| &Dhcp6Ins->Dhcp6, | |
| &gDhcp6ProtocolTemplate, | |
| sizeof (EFI_DHCP6_PROTOCOL) | |
| ); | |
| InitializeListHead (&Dhcp6Ins->TxList); | |
| InitializeListHead (&Dhcp6Ins->InfList); | |
| // | |
| // There is a timer for each Dhcp6 instance, which is used to track the | |
| // lease time of Ia and the retransmission time of all sent packets. | |
| // | |
| Status = gBS->CreateEvent ( | |
| EVT_NOTIFY_SIGNAL | EVT_TIMER, | |
| TPL_CALLBACK, | |
| Dhcp6OnTimerTick, | |
| Dhcp6Ins, | |
| &Dhcp6Ins->Timer | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| FreePool (Dhcp6Ins); | |
| return Status; | |
| } | |
| *Instance = Dhcp6Ins; | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Callback function which provided by user to remove one node in NetDestroyLinkList process. | |
| @param[in] Entry The entry to be removed. | |
| @param[in] Context Pointer to the callback context corresponds to the Context in NetDestroyLinkList. | |
| @retval EFI_SUCCESS The entry has been removed successfully. | |
| @retval Others Fail to remove the entry. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| Dhcp6DestroyChildEntry ( | |
| IN LIST_ENTRY *Entry, | |
| IN VOID *Context | |
| ) | |
| { | |
| DHCP6_INSTANCE *Instance; | |
| EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding; | |
| if (Entry == NULL || Context == NULL) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| Instance = NET_LIST_USER_STRUCT_S (Entry, DHCP6_INSTANCE, Link, DHCP6_INSTANCE_SIGNATURE); | |
| ServiceBinding = (EFI_SERVICE_BINDING_PROTOCOL *) Context; | |
| return ServiceBinding->DestroyChild (ServiceBinding, Instance->Handle); | |
| } | |
| /** | |
| Entry point of the DHCP6 driver to install various protocols. | |
| @param[in] ImageHandle The handle of the UEFI image file. | |
| @param[in] SystemTable The pointer to the EFI System Table. | |
| @retval EFI_SUCCESS The operation completed successfully. | |
| @retval Others Unexpected error occurs. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| Dhcp6DriverEntryPoint ( | |
| IN EFI_HANDLE ImageHandle, | |
| IN EFI_SYSTEM_TABLE *SystemTable | |
| ) | |
| { | |
| return EfiLibInstallDriverBindingComponentName2 ( | |
| ImageHandle, | |
| SystemTable, | |
| &gDhcp6DriverBinding, | |
| ImageHandle, | |
| &gDhcp6ComponentName, | |
| &gDhcp6ComponentName2 | |
| ); | |
| } | |
| /** | |
| Test to see if this driver supports ControllerHandle. This service | |
| is called by the EFI boot service ConnectController(). In | |
| order to make drivers as small as possible, there are a few calling | |
| restrictions for this service. ConnectController() must | |
| follow these calling restrictions. If any other agent wishes to call | |
| Supported() it must also follow these calling restrictions. | |
| @param[in] This The pointer to the driver binding protocol. | |
| @param[in] ControllerHandle The handle of device to be tested. | |
| @param[in] RemainingDevicePath Optional parameter use to pick a specific child | |
| device to be started. | |
| @retval EFI_SUCCESS This driver supports this device. | |
| @retval Others This driver does not support this device. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| Dhcp6DriverBindingSupported ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE ControllerHandle, | |
| IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL | |
| ) | |
| { | |
| return gBS->OpenProtocol ( | |
| ControllerHandle, | |
| &gEfiUdp6ServiceBindingProtocolGuid, | |
| NULL, | |
| This->DriverBindingHandle, | |
| ControllerHandle, | |
| EFI_OPEN_PROTOCOL_TEST_PROTOCOL | |
| ); | |
| } | |
| /** | |
| Start this driver on ControllerHandle. This service is called by the | |
| EFI boot service ConnectController(). In order to make | |
| drivers as small as possible, there are a few calling restrictions for | |
| this service. ConnectController() must follow these | |
| calling restrictions. If any other agent wishes to call Start() it | |
| must also follow these calling restrictions. | |
| @param[in] This The pointer to the driver binding protocol. | |
| @param[in] ControllerHandle The handle of device to be started. | |
| @param[in] RemainingDevicePath Optional parameter use to pick a specific child | |
| device to be started. | |
| @retval EFI_SUCCESS This driver is installed 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 | |
| Dhcp6DriverBindingStart ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE ControllerHandle, | |
| IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| DHCP6_SERVICE *Service; | |
| // | |
| // Check the Dhcp6 service whether already started. | |
| // | |
| Status = gBS->OpenProtocol ( | |
| ControllerHandle, | |
| &gEfiDhcp6ServiceBindingProtocolGuid, | |
| NULL, | |
| This->DriverBindingHandle, | |
| ControllerHandle, | |
| EFI_OPEN_PROTOCOL_TEST_PROTOCOL | |
| ); | |
| if (!EFI_ERROR (Status)) { | |
| return EFI_ALREADY_STARTED; | |
| } | |
| // | |
| // Create and initialize the Dhcp6 service. | |
| // | |
| Status = Dhcp6CreateService ( | |
| ControllerHandle, | |
| This->DriverBindingHandle, | |
| &Service | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| ASSERT (Service != NULL); | |
| Status = gBS->InstallMultipleProtocolInterfaces ( | |
| &ControllerHandle, | |
| &gEfiDhcp6ServiceBindingProtocolGuid, | |
| &Service->ServiceBinding, | |
| NULL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| Dhcp6DestroyService (Service); | |
| return Status; | |
| } | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Stop this driver on ControllerHandle. This service is called by the | |
| EFI boot service DisconnectController(). In order to | |
| make drivers as small as possible, there are a few calling | |
| restrictions for this service. DisconnectController() | |
| must follow these calling restrictions. If any other agent wishes | |
| to call Stop() it must also follow these calling restrictions. | |
| @param[in] This Protocol instance pointer. | |
| @param[in] ControllerHandle Handle of device to stop driver on | |
| @param[in] NumberOfChildren Number of Handles in ChildHandleBuffer. If number of | |
| children is zero stop the entire bus driver. | |
| @param[in] ChildHandleBuffer List of Child Handles to Stop. | |
| @retval EFI_SUCCESS This driver is removed ControllerHandle | |
| @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. | |
| @retval other This driver was not removed from this device | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| Dhcp6DriverBindingStop ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE ControllerHandle, | |
| IN UINTN NumberOfChildren, | |
| IN EFI_HANDLE *ChildHandleBuffer OPTIONAL | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_HANDLE NicHandle; | |
| EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding; | |
| DHCP6_SERVICE *Service; | |
| LIST_ENTRY *List; | |
| UINTN ListLength; | |
| // | |
| // Find and check the Nic handle by the controller handle. | |
| // | |
| NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp6ProtocolGuid); | |
| if (NicHandle == NULL) { | |
| return EFI_SUCCESS; | |
| } | |
| Status = gBS->OpenProtocol ( | |
| NicHandle, | |
| &gEfiDhcp6ServiceBindingProtocolGuid, | |
| (VOID **) &ServiceBinding, | |
| This->DriverBindingHandle, | |
| NicHandle, | |
| EFI_OPEN_PROTOCOL_GET_PROTOCOL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| Service = DHCP6_SERVICE_FROM_THIS (ServiceBinding); | |
| if (!IsListEmpty (&Service->Child)) { | |
| // | |
| // Destroy all the children instances before destroy the service. | |
| // | |
| List = &Service->Child; | |
| Status = NetDestroyLinkList ( | |
| List, | |
| Dhcp6DestroyChildEntry, | |
| ServiceBinding, | |
| &ListLength | |
| ); | |
| if (EFI_ERROR (Status) || ListLength != 0) { | |
| Status = EFI_DEVICE_ERROR; | |
| } | |
| } | |
| if (NumberOfChildren == 0 && !IsListEmpty (&Service->Child)) { | |
| Status = EFI_DEVICE_ERROR; | |
| } | |
| if (NumberOfChildren == 0 && IsListEmpty (&Service->Child)) { | |
| // | |
| // Destroy the service itself if no child instance left. | |
| // | |
| Status = gBS->UninstallProtocolInterface ( | |
| NicHandle, | |
| &gEfiDhcp6ServiceBindingProtocolGuid, | |
| ServiceBinding | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ON_EXIT; | |
| } | |
| Dhcp6DestroyService (Service); | |
| Status = EFI_SUCCESS; | |
| } | |
| ON_EXIT: | |
| return Status; | |
| } | |
| /** | |
| Creates a child handle and installs a protocol. | |
| The CreateChild() function installs a protocol on ChildHandle. | |
| If ChildHandle is a pointer to NULL, then a new handle is created and returned in ChildHandle. | |
| If ChildHandle is not a pointer to NULL, then the protocol installs on the existing ChildHandle. | |
| @param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance. | |
| @param[in, out] ChildHandle Pointer to the handle of the child to create. If it is NULL, | |
| then a new handle is created. If it is a pointer to an existing | |
| UEFI handle, then the protocol is added to the existing UEFI handle. | |
| @retval EFI_SUCCESS The protocol was added to ChildHandle. | |
| @retval EFI_INVALID_PARAMETER ChildHandle is NULL. | |
| @retval other The child handle was not created. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| Dhcp6ServiceBindingCreateChild ( | |
| IN EFI_SERVICE_BINDING_PROTOCOL *This, | |
| IN OUT EFI_HANDLE *ChildHandle | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_TPL OldTpl; | |
| DHCP6_SERVICE *Service; | |
| DHCP6_INSTANCE *Instance; | |
| VOID *Udp6; | |
| if (This == NULL || ChildHandle == NULL) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| Service = DHCP6_SERVICE_FROM_THIS (This); | |
| Status = Dhcp6CreateInstance (Service, &Instance); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| ASSERT (Instance != NULL); | |
| // | |
| // Start the timer when the instance is ready to use. | |
| // | |
| Status = gBS->SetTimer ( | |
| Instance->Timer, | |
| TimerPeriodic, | |
| TICKS_PER_SECOND | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ON_ERROR; | |
| } | |
| // | |
| // Install the DHCP6 protocol onto ChildHandle. | |
| // | |
| Status = gBS->InstallMultipleProtocolInterfaces ( | |
| ChildHandle, | |
| &gEfiDhcp6ProtocolGuid, | |
| &Instance->Dhcp6, | |
| NULL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| goto ON_ERROR; | |
| } | |
| Instance->Handle = *ChildHandle; | |
| // | |
| // Open the UDP6 protocol BY_CHILD. | |
| // | |
| Status = gBS->OpenProtocol ( | |
| Service->UdpIo->UdpHandle, | |
| &gEfiUdp6ProtocolGuid, | |
| (VOID **) &Udp6, | |
| gDhcp6DriverBinding.DriverBindingHandle, | |
| Instance->Handle, | |
| EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| gBS->UninstallMultipleProtocolInterfaces ( | |
| Instance->Handle, | |
| &gEfiDhcp6ProtocolGuid, | |
| &Instance->Dhcp6, | |
| NULL | |
| ); | |
| goto ON_ERROR; | |
| } | |
| // | |
| // Add into the children list of its parent service. | |
| // | |
| OldTpl = gBS->RaiseTPL (TPL_CALLBACK); | |
| InsertTailList (&Service->Child, &Instance->Link); | |
| Service->NumOfChild++; | |
| gBS->RestoreTPL (OldTpl); | |
| return EFI_SUCCESS; | |
| ON_ERROR: | |
| Dhcp6DestroyInstance (Instance); | |
| return Status; | |
| } | |
| /** | |
| Destroys a child handle with a protocol installed on it. | |
| The DestroyChild() function does the opposite of CreateChild(). It removes a protocol | |
| that was installed by CreateChild() from ChildHandle. If the removed protocol is the | |
| last protocol on ChildHandle, then ChildHandle is destroyed. | |
| @param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance. | |
| @param[in] ChildHandle Handle of the child to destroy | |
| @retval EFI_SUCCESS The protocol was removed from ChildHandle. | |
| @retval EFI_UNSUPPORTED ChildHandle does not support the protocol that is being removed. | |
| @retval EFI_INVALID_PARAMETER Child handle is NULL. | |
| @retval EFI_ACCESS_DENIED The protocol could not be removed from the ChildHandle | |
| because its services are being used. | |
| @retval other The child handle was not destroyed | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| Dhcp6ServiceBindingDestroyChild ( | |
| IN EFI_SERVICE_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE ChildHandle | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_TPL OldTpl; | |
| EFI_DHCP6_PROTOCOL *Dhcp6; | |
| DHCP6_SERVICE *Service; | |
| DHCP6_INSTANCE *Instance; | |
| if (This == NULL || ChildHandle == NULL) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Retrieve the private context data structures | |
| // | |
| Status = gBS->OpenProtocol ( | |
| ChildHandle, | |
| &gEfiDhcp6ProtocolGuid, | |
| (VOID **) &Dhcp6, | |
| gDhcp6DriverBinding.DriverBindingHandle, | |
| ChildHandle, | |
| EFI_OPEN_PROTOCOL_GET_PROTOCOL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return EFI_UNSUPPORTED; | |
| } | |
| Instance = DHCP6_INSTANCE_FROM_THIS (Dhcp6); | |
| Service = DHCP6_SERVICE_FROM_THIS (This); | |
| if (Instance->Service != Service) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| if (Instance->InDestroy) { | |
| return EFI_SUCCESS; | |
| } | |
| OldTpl = gBS->RaiseTPL (TPL_CALLBACK); | |
| Instance->InDestroy = TRUE; | |
| Status = gBS->CloseProtocol ( | |
| Service->UdpIo->UdpHandle, | |
| &gEfiUdp6ProtocolGuid, | |
| gDhcp6DriverBinding.DriverBindingHandle, | |
| ChildHandle | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| Instance->InDestroy = FALSE; | |
| gBS->RestoreTPL (OldTpl); | |
| return Status; | |
| } | |
| // | |
| // Uninstall the MTFTP6 protocol first to enable a top down destruction. | |
| // | |
| gBS->RestoreTPL (OldTpl); | |
| Status = gBS->UninstallProtocolInterface ( | |
| ChildHandle, | |
| &gEfiDhcp6ProtocolGuid, | |
| Dhcp6 | |
| ); | |
| OldTpl = gBS->RaiseTPL (TPL_CALLBACK); | |
| if (EFI_ERROR (Status)) { | |
| Instance->InDestroy = FALSE; | |
| gBS->RestoreTPL (OldTpl); | |
| return Status; | |
| } | |
| // | |
| // Remove it from the children list of its parent service. | |
| // | |
| RemoveEntryList (&Instance->Link); | |
| Service->NumOfChild--; | |
| gBS->RestoreTPL (OldTpl); | |
| Dhcp6DestroyInstance (Instance); | |
| return EFI_SUCCESS; | |
| } |