123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813 |
- /** @file
- Driver Binding functions and Service Binding functions
- implementationfor 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 retransmisson 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 serivce 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 destory 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_SUCCES 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_SUCCES 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;
- }
|