diff options
Diffstat (limited to 'NetworkPkg/DnsDxe/DnsDriver.c')
| -rw-r--r-- | NetworkPkg/DnsDxe/DnsDriver.c | 1554 |
1 files changed, 1554 insertions, 0 deletions
diff --git a/NetworkPkg/DnsDxe/DnsDriver.c b/NetworkPkg/DnsDxe/DnsDriver.c new file mode 100644 index 0000000000..6ca8aa7bdd --- /dev/null +++ b/NetworkPkg/DnsDxe/DnsDriver.c @@ -0,0 +1,1554 @@ +/** @file
+The driver binding and service binding protocol for DnsDxe driver.
+
+Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+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.
+
+**/
+
+#include "DnsImpl.h"
+
+EFI_DRIVER_BINDING_PROTOCOL gDns4DriverBinding = {
+ Dns4DriverBindingSupported,
+ Dns4DriverBindingStart,
+ Dns4DriverBindingStop,
+ DNS_VERSION,
+ NULL,
+ NULL
+};
+
+EFI_DRIVER_BINDING_PROTOCOL gDns6DriverBinding = {
+ Dns6DriverBindingSupported,
+ Dns6DriverBindingStart,
+ Dns6DriverBindingStop,
+ DNS_VERSION,
+ NULL,
+ NULL
+};
+
+EFI_SERVICE_BINDING_PROTOCOL mDns4ServiceBinding = {
+ Dns4ServiceBindingCreateChild,
+ Dns4ServiceBindingDestroyChild
+};
+
+EFI_SERVICE_BINDING_PROTOCOL mDns6ServiceBinding = {
+ Dns6ServiceBindingCreateChild,
+ Dns6ServiceBindingDestroyChild
+};
+
+DNS_DRIVER_DATA *mDriverData = NULL;
+
+/**
+ Destroy the DNS instance and recycle the resources.
+
+ @param[in] Instance The pointer to the DNS instance.
+
+**/
+VOID
+DnsDestroyInstance (
+ IN DNS_INSTANCE *Instance
+ )
+{
+ ZeroMem (&Instance->Dns4CfgData, sizeof (EFI_DNS4_CONFIG_DATA));
+
+ ZeroMem (&Instance->Dns6CfgData, sizeof (EFI_DNS6_CONFIG_DATA));
+
+ if (!NetMapIsEmpty (&Instance->Dns4TxTokens)) {
+ Dns4InstanceCancelToken (Instance, NULL);
+ }
+
+ if (!NetMapIsEmpty (&Instance->Dns6TxTokens)) {
+ Dns6InstanceCancelToken (Instance, NULL);
+ }
+
+ if (Instance->UdpIo!= NULL) {
+ UdpIoFreeIo (Instance->UdpIo);
+ }
+
+ FreePool (Instance);
+}
+
+/**
+ Create the DNS instance and initialize it.
+
+ @param[in] Service The pointer to the DNS service.
+ @param[out] Instance The pointer to the DNS instance.
+
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resources.
+ @retval EFI_SUCCESS The DNS instance is created.
+
+**/
+EFI_STATUS
+DnsCreateInstance (
+ IN DNS_SERVICE *Service,
+ OUT DNS_INSTANCE **Instance
+ )
+{
+ DNS_INSTANCE *DnsIns;
+
+ *Instance = NULL;
+
+ DnsIns = AllocateZeroPool (sizeof (DNS_INSTANCE));
+ if (DnsIns == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ DnsIns->Signature = DNS_INSTANCE_SIGNATURE;
+ InitializeListHead (&DnsIns->Link);
+ DnsIns->State = DNS_STATE_UNCONFIGED;
+ DnsIns->InDestroy = FALSE;
+ DnsIns->Service = Service;
+
+ if (Service->IpVersion == IP_VERSION_4) {
+ CopyMem (&DnsIns->Dns4, &mDns4Protocol, sizeof (DnsIns->Dns4));
+ NetMapInit (&DnsIns->Dns4TxTokens);
+ } else {
+ CopyMem (&DnsIns->Dns6, &mDns6Protocol, sizeof (DnsIns->Dns6));
+ NetMapInit (&DnsIns->Dns6TxTokens);
+ }
+
+ DnsIns->UdpIo = UdpIoCreateIo (
+ Service->ControllerHandle, /// NicHandle
+ Service->ImageHandle,
+ DnsConfigNullUdp,
+ Service->IpVersion,
+ DnsIns
+ );
+ if (DnsIns->UdpIo == NULL) {
+ FreePool (DnsIns);
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ *Instance = DnsIns;
+
+ 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
+DnsDestroyChildEntryInHandleBuffer (
+ IN LIST_ENTRY *Entry,
+ IN VOID *Context
+ )
+{
+ DNS_INSTANCE *Instance;
+ EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;
+ UINTN NumberOfChildren;
+ EFI_HANDLE *ChildHandleBuffer;
+
+ if (Entry == NULL || Context == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Instance = NET_LIST_USER_STRUCT_S (Entry, DNS_INSTANCE, Link, DNS_INSTANCE_SIGNATURE);
+ ServiceBinding = ((DNS_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT *) Context)->ServiceBinding;
+ NumberOfChildren = ((DNS_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT *) Context)->NumberOfChildren;
+ ChildHandleBuffer = ((DNS_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT *) Context)->ChildHandleBuffer;
+
+ if (!NetIsInHandleBuffer (Instance->ChildHandle, NumberOfChildren, ChildHandleBuffer)) {
+ return EFI_SUCCESS;
+ }
+
+ return ServiceBinding->DestroyChild (ServiceBinding, Instance->ChildHandle);
+}
+
+/**
+ Config a NULL UDP that is used to keep the connection between UDP and DNS.
+
+ Just leave the Udp child unconfigured. When UDP is unloaded,
+ DNS will be informed with DriverBinding Stop.
+
+ @param UdpIo The UDP_IO to configure
+ @param Context The opaque parameter to the callback
+
+ @retval EFI_SUCCESS It always return EFI_SUCCESS directly.
+
+**/
+EFI_STATUS
+EFIAPI
+DnsConfigNullUdp (
+ IN UDP_IO *UdpIo,
+ IN VOID *Context
+ )
+{
+ return EFI_SUCCESS;
+}
+
+/**
+ Release all the resource used the DNS service binding instance.
+
+ @param DnsSb The Dns service binding instance.
+
+**/
+VOID
+DnsDestroyService (
+ IN DNS_SERVICE *DnsSb
+ )
+{
+ UdpIoFreeIo (DnsSb->ConnectUdp);
+
+ if (DnsSb->TimerToGetMap != NULL){
+ gBS->CloseEvent (DnsSb->TimerToGetMap);
+ }
+
+ if (DnsSb->Timer != NULL){
+ gBS->CloseEvent (DnsSb->Timer);
+ }
+
+ FreePool (DnsSb);
+}
+
+/**
+ Create then initialize a Dns service binding instance.
+
+ @param Controller The controller to install the DNS service
+ binding on
+ @param Image The driver binding image of the DNS driver
+ @param IpVersion IpVersion for this service
+ @param Service The variable to receive the created service
+ binding instance.
+
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resource to create the instance.
+ @retval EFI_DEVICE_ERROR Failed to create a NULL UDP port to keep
+ connection with UDP.
+ @retval EFI_SUCCESS The service instance is created for the
+ controller.
+
+**/
+EFI_STATUS
+DnsCreateService (
+ IN EFI_HANDLE Controller,
+ IN EFI_HANDLE Image,
+ IN UINT8 IpVersion,
+ OUT DNS_SERVICE **Service
+ )
+{
+ EFI_STATUS Status;
+ DNS_SERVICE *DnsSb;
+
+ Status = EFI_SUCCESS;
+ DnsSb = NULL;
+
+ *Service = NULL;
+
+ DnsSb = AllocateZeroPool (sizeof (DNS_SERVICE));
+ if (DnsSb == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ DnsSb->Signature = DNS_SERVICE_SIGNATURE;
+
+ if (IpVersion == IP_VERSION_4) {
+ DnsSb->ServiceBinding = mDns4ServiceBinding;
+ } else {
+ DnsSb->ServiceBinding = mDns6ServiceBinding;
+ }
+
+ DnsSb->Dns4ChildrenNum = 0;
+ InitializeListHead (&DnsSb->Dns4ChildrenList);
+
+ DnsSb->Dns6ChildrenNum = 0;
+ InitializeListHead (&DnsSb->Dns6ChildrenList);
+
+ DnsSb->ControllerHandle = Controller;
+ DnsSb->ImageHandle = Image;
+
+ DnsSb->TimerToGetMap = NULL;
+
+ DnsSb->Timer = NULL;
+
+ DnsSb->IpVersion = IpVersion;
+
+ //
+ // Create the timer used to time out the procedure which is used to
+ // get the default IP address.
+ //
+ if (DnsSb->IpVersion == IP_VERSION_4) {
+ Status = gBS->CreateEvent (
+ EVT_TIMER,
+ TPL_CALLBACK,
+ NULL,
+ NULL,
+ &DnsSb->TimerToGetMap
+ );
+ if (EFI_ERROR (Status)) {
+ FreePool (DnsSb);
+ return Status;
+ }
+ }
+
+ //
+ // Create the timer to retransmit packets.
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL | EVT_TIMER,
+ TPL_CALLBACK,
+ DnsOnTimerRetransmit,
+ DnsSb,
+ &DnsSb->Timer
+ );
+ if (EFI_ERROR (Status)) {
+ if (DnsSb->TimerToGetMap != NULL) {
+ gBS->CloseEvent (DnsSb->TimerToGetMap);
+ }
+ FreePool (DnsSb);
+ return Status;
+ }
+
+ DnsSb->ConnectUdp = NULL;
+ DnsSb->ConnectUdp = UdpIoCreateIo (
+ Controller,
+ Image,
+ DnsConfigNullUdp,
+ DnsSb->IpVersion,
+ NULL
+ );
+ if (DnsSb->ConnectUdp == NULL) {
+ if (DnsSb->TimerToGetMap != NULL) {
+ gBS->CloseEvent (DnsSb->TimerToGetMap);
+ }
+ gBS->CloseEvent (DnsSb->Timer);
+ FreePool (DnsSb);
+ return EFI_DEVICE_ERROR;
+ }
+
+ *Service = DnsSb;
+ return Status;
+}
+
+/**
+ Unloads an image.
+
+ @param ImageHandle Handle that identifies the image to be unloaded.
+
+ @retval EFI_SUCCESS The image has been unloaded.
+ @retval EFI_INVALID_PARAMETER ImageHandle is not a valid image handle.
+
+**/
+EFI_STATUS
+EFIAPI
+DnsUnload (
+ IN EFI_HANDLE ImageHandle
+ )
+{
+ EFI_STATUS Status;
+
+ LIST_ENTRY *Entry;
+ DNS4_CACHE *ItemCache4;
+ DNS4_SERVER_IP *ItemServerIp4;
+ DNS6_CACHE *ItemCache6;
+ DNS6_SERVER_IP *ItemServerIp6;
+
+ ItemCache4 = NULL;
+ ItemServerIp4 = NULL;
+ ItemCache6 = NULL;
+ ItemServerIp6 = NULL;
+
+ //
+ // Disconnect the driver specified by ImageHandle
+ //
+ Status = NetLibDefaultUnload(ImageHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Free mDriverData.
+ //
+ if (mDriverData != NULL) {
+ if (mDriverData->Timer != NULL) {
+ gBS->CloseEvent (mDriverData->Timer);
+ }
+
+ while (!IsListEmpty (&mDriverData->Dns4CacheList)) {
+ Entry = NetListRemoveHead (&mDriverData->Dns4CacheList);
+ ItemCache4 = NET_LIST_USER_STRUCT (Entry, DNS4_CACHE, AllCacheLink);
+ if (ItemCache4->DnsCache.HostName != NULL) {
+ FreePool (ItemCache4->DnsCache.HostName);
+ }
+ if (ItemCache4->DnsCache.IpAddress != NULL) {
+ FreePool (ItemCache4->DnsCache.IpAddress);
+ }
+ FreePool (ItemCache4);
+ }
+
+ while (!IsListEmpty (&mDriverData->Dns4ServerList)) {
+ Entry = NetListRemoveHead (&mDriverData->Dns4ServerList);
+ ItemServerIp4 = NET_LIST_USER_STRUCT (Entry, DNS4_SERVER_IP, AllServerLink);
+ FreePool (ItemServerIp4);
+ }
+
+ while (!IsListEmpty (&mDriverData->Dns6CacheList)) {
+ Entry = NetListRemoveHead (&mDriverData->Dns6CacheList);
+ ItemCache6 = NET_LIST_USER_STRUCT (Entry, DNS6_CACHE, AllCacheLink);
+ if (ItemCache6->DnsCache.HostName != NULL) {
+ FreePool (ItemCache6->DnsCache.HostName);
+ }
+ if (ItemCache6->DnsCache.IpAddress != NULL) {
+ FreePool (ItemCache6->DnsCache.IpAddress);
+ }
+ FreePool (ItemCache6);
+ }
+
+ while (!IsListEmpty (&mDriverData->Dns6ServerList)) {
+ Entry = NetListRemoveHead (&mDriverData->Dns6ServerList);
+ ItemServerIp6 = NET_LIST_USER_STRUCT (Entry, DNS6_SERVER_IP, AllServerLink);
+ FreePool (ItemServerIp6);
+ }
+
+ FreePool (mDriverData);
+ }
+
+ return Status;
+}
+
+/**
+ This is the declaration of an EFI image entry point. This entry point is
+ the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
+ both device drivers and bus drivers.
+
+ @param ImageHandle The firmware allocated handle for the UEFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval Others An unexpected error occurred.
+**/
+EFI_STATUS
+EFIAPI
+DnsDriverEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = EFI_SUCCESS;
+
+ //
+ // Install the Dns4 Driver Binding Protocol.
+ //
+ Status = EfiLibInstallDriverBindingComponentName2 (
+ ImageHandle,
+ SystemTable,
+ &gDns4DriverBinding,
+ ImageHandle,
+ &gDnsComponentName,
+ &gDnsComponentName2
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Install the Dns6 Driver Binding Protocol.
+ //
+ Status = EfiLibInstallDriverBindingComponentName2 (
+ ImageHandle,
+ SystemTable,
+ &gDns6DriverBinding,
+ NULL,
+ &gDnsComponentName,
+ &gDnsComponentName2
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error1;
+ }
+
+ //
+ // Create the driver data structures.
+ //
+ mDriverData = AllocateZeroPool (sizeof (DNS_DRIVER_DATA));
+ if (mDriverData == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Error2;
+ }
+
+ //
+ // Create the timer event to update DNS cache list.
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL | EVT_TIMER,
+ TPL_CALLBACK,
+ DnsOnTimerUpdate,
+ NULL,
+ &mDriverData->Timer
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error3;
+ }
+
+ Status = gBS->SetTimer (mDriverData->Timer, TimerPeriodic, TICKS_PER_SECOND);
+ if (EFI_ERROR (Status)) {
+ goto Error4;
+ }
+
+ InitializeListHead (&mDriverData->Dns4CacheList);
+ InitializeListHead (&mDriverData->Dns4ServerList);
+ InitializeListHead (&mDriverData->Dns6CacheList);
+ InitializeListHead (&mDriverData->Dns6ServerList);
+
+ return Status;
+
+ Error4:
+ gBS->CloseEvent (mDriverData->Timer);
+
+ Error3:
+ FreePool (mDriverData);
+
+ Error2:
+ gBS->UninstallMultipleProtocolInterfaces (
+ gDns6DriverBinding.DriverBindingHandle,
+ &gEfiDriverBindingProtocolGuid,
+ &gDns6DriverBinding,
+ &gEfiComponentName2ProtocolGuid,
+ &gDnsComponentName2,
+ &gEfiComponentNameProtocolGuid,
+ &gDnsComponentName,
+ NULL
+ );
+
+ Error1:
+ gBS->UninstallMultipleProtocolInterfaces (
+ ImageHandle,
+ &gEfiDriverBindingProtocolGuid,
+ &gDns4DriverBinding,
+ &gEfiComponentName2ProtocolGuid,
+ &gDnsComponentName2,
+ &gEfiComponentNameProtocolGuid,
+ &gDnsComponentName,
+ NULL
+ );
+
+ return Status;
+}
+
+/**
+ Tests to see if this driver supports a given controller. If a child device is provided,
+ it further tests to see if this driver supports creating a handle for the specified child device.
+
+ This function checks to see if the driver specified by This supports the device specified by
+ ControllerHandle. Drivers will typically use the device path attached to
+ ControllerHandle and/or the services from the bus I/O abstraction attached to
+ ControllerHandle to determine if the driver supports ControllerHandle. This function
+ may be called many times during platform initialization. In order to reduce boot times, the tests
+ performed by this function must be very small, and take as little time as possible to execute. This
+ function must not change the state of any hardware devices, and this function must be aware that the
+ device specified by ControllerHandle may already be managed by the same driver or a
+ different driver. This function must match its calls to AllocatePages() with FreePages(),
+ AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+ Because ControllerHandle may have been previously started by the same driver, if a protocol is
+ already in the opened state, then it must not be closed with CloseProtocol(). This is required
+ to guarantee the state of ControllerHandle is not modified by this function.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle The handle of the controller to test. This handle
+ must support a protocol interface that supplies
+ an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
+ parameter is ignored by device drivers, and is optional for bus
+ drivers. For bus drivers, if this parameter is not NULL, then
+ the bus driver must determine if the bus controller specified
+ by ControllerHandle and the child controller specified
+ by RemainingDevicePath are both supported by this
+ bus driver.
+
+ @retval EFI_SUCCESS The device specified by ControllerHandle and
+ RemainingDevicePath is supported by the driver specified by This.
+ @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
+ RemainingDevicePath is already being managed by the driver
+ specified by This.
+ @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
+ RemainingDevicePath is already being managed by a different
+ driver or an application that requires exclusive access.
+ Currently not implemented.
+ @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
+ RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+Dns4DriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Test for the Dns4ServiceBinding Protocol.
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiDns4ServiceBindingProtocolGuid,
+ NULL,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_TEST_PROTOCOL
+ );
+ if (!EFI_ERROR (Status)) {
+ return EFI_ALREADY_STARTED;
+ }
+
+ //
+ // Test for the Udp4ServiceBinding Protocol.
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiUdp4ServiceBindingProtocolGuid,
+ NULL,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_TEST_PROTOCOL
+ );
+
+ return Status;
+}
+
+/**
+ Starts a device controller or a bus controller.
+
+ The Start() function is designed to be invoked from the EFI boot service ConnectController().
+ As a result, much of the error checking on the parameters to Start() has been moved into this
+ common boot service. It is legal to call Start() from other locations,
+ but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+ 1. ControllerHandle must be a valid EFI_HANDLE.
+ 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+ EFI_DEVICE_PATH_PROTOCOL.
+ 3. Prior to calling Start(), the Supported() function for the driver specified by This must
+ have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle The handle of the controller to start. This handle
+ must support a protocol interface that supplies
+ an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
+ parameter is ignored by device drivers, and is optional for bus
+ drivers. For a bus driver, if this parameter is NULL, then handles
+ for all the children of Controller are created by this driver.
+ If this parameter is not NULL and the first Device Path Node is
+ not the End of Device Path Node, then only the handle for the
+ child device specified by the first Device Path Node of
+ RemainingDevicePath is created by this driver.
+ If the first Device Path Node of RemainingDevicePath is
+ the End of Device Path Node, no child handle is created by this
+ driver.
+
+ @retval EFI_SUCCESS The device was started.
+ @retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
+ @retval Others The driver failded to start the device.
+
+**/
+EFI_STATUS
+EFIAPI
+Dns4DriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ DNS_SERVICE *DnsSb;
+ EFI_STATUS Status;
+
+ Status = DnsCreateService (ControllerHandle, This->DriverBindingHandle, IP_VERSION_4, &DnsSb);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ ASSERT (DnsSb != NULL);
+
+ Status = gBS->SetTimer (DnsSb->Timer, TimerPeriodic, TICKS_PER_SECOND);
+ if (EFI_ERROR (Status)) {
+ goto ON_ERROR;
+ }
+
+ //
+ // Install the Dns4ServiceBinding Protocol onto ControllerHandle.
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &ControllerHandle,
+ &gEfiDns4ServiceBindingProtocolGuid,
+ &DnsSb->ServiceBinding,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ goto ON_ERROR;
+ }
+
+ return EFI_SUCCESS;
+
+ON_ERROR:
+ DnsDestroyService (DnsSb);
+
+ return Status;
+}
+
+/**
+ Stops a device controller or a bus controller.
+
+ The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+ As a result, much of the error checking on the parameters to Stop() has been moved
+ into this common boot service. It is legal to call Stop() from other locations,
+ but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+ 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+ same driver's Start() function.
+ 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+ EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+ Start() function, and the Start() function must have called OpenProtocol() on
+ ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle A handle to the device being stopped. The handle must
+ support a bus specific I/O protocol for the driver
+ to use to stop the device.
+ @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.
+ @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
+ if NumberOfChildren is 0.
+
+ @retval EFI_SUCCESS The device was stopped.
+ @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+Dns4DriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
+ )
+{
+ EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;
+ DNS_SERVICE *DnsSb;
+ EFI_HANDLE NicHandle;
+ EFI_STATUS Status;
+ LIST_ENTRY *List;
+ DNS_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT Context;
+
+ //
+ // DNS driver opens UDP child, So, Controller is a UDP
+ // child handle. Locate the Nic handle first. Then get the
+ // DNS private data back.
+ //
+ NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp4ProtocolGuid);
+
+ if (NicHandle == NULL) {
+ return EFI_SUCCESS;
+ }
+
+ Status = gBS->OpenProtocol (
+ NicHandle,
+ &gEfiDns4ServiceBindingProtocolGuid,
+ (VOID **) &ServiceBinding,
+ This->DriverBindingHandle,
+ NicHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ DnsSb = DNS_SERVICE_FROM_THIS (ServiceBinding);
+
+ if (!IsListEmpty (&DnsSb->Dns4ChildrenList)) {
+ //
+ // Destroy the Dns child instance in ChildHandleBuffer.
+ //
+ List = &DnsSb->Dns4ChildrenList;
+ Context.ServiceBinding = ServiceBinding;
+ Context.NumberOfChildren = NumberOfChildren;
+ Context.ChildHandleBuffer = ChildHandleBuffer;
+ Status = NetDestroyLinkList (
+ List,
+ DnsDestroyChildEntryInHandleBuffer,
+ &Context,
+ NULL
+ );
+ }
+
+ if (NumberOfChildren == 0 && IsListEmpty (&DnsSb->Dns4ChildrenList)) {
+ gBS->UninstallProtocolInterface (
+ NicHandle,
+ &gEfiDns4ServiceBindingProtocolGuid,
+ ServiceBinding
+ );
+
+ DnsDestroyService (DnsSb);
+
+ if (gDnsControllerNameTable != NULL) {
+ FreeUnicodeStringTable (gDnsControllerNameTable);
+ gDnsControllerNameTable = NULL;
+ }
+
+ Status = EFI_SUCCESS;
+ }
+
+ return Status;
+}
+
+/**
+ Tests to see if this driver supports a given controller. If a child device is provided,
+ it further tests to see if this driver supports creating a handle for the specified child device.
+
+ This function checks to see if the driver specified by This supports the device specified by
+ ControllerHandle. Drivers will typically use the device path attached to
+ ControllerHandle and/or the services from the bus I/O abstraction attached to
+ ControllerHandle to determine if the driver supports ControllerHandle. This function
+ may be called many times during platform initialization. In order to reduce boot times, the tests
+ performed by this function must be very small, and take as little time as possible to execute. This
+ function must not change the state of any hardware devices, and this function must be aware that the
+ device specified by ControllerHandle may already be managed by the same driver or a
+ different driver. This function must match its calls to AllocatePages() with FreePages(),
+ AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+ Because ControllerHandle may have been previously started by the same driver, if a protocol is
+ already in the opened state, then it must not be closed with CloseProtocol(). This is required
+ to guarantee the state of ControllerHandle is not modified by this function.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle The handle of the controller to test. This handle
+ must support a protocol interface that supplies
+ an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
+ parameter is ignored by device drivers, and is optional for bus
+ drivers. For bus drivers, if this parameter is not NULL, then
+ the bus driver must determine if the bus controller specified
+ by ControllerHandle and the child controller specified
+ by RemainingDevicePath are both supported by this
+ bus driver.
+
+ @retval EFI_SUCCESS The device specified by ControllerHandle and
+ RemainingDevicePath is supported by the driver specified by This.
+ @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
+ RemainingDevicePath is already being managed by the driver
+ specified by This.
+ @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
+ RemainingDevicePath is already being managed by a different
+ driver or an application that requires exclusive access.
+ Currently not implemented.
+ @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
+ RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+Dns6DriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Test for the Dns6ServiceBinding Protocol
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiDns6ServiceBindingProtocolGuid,
+ NULL,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_TEST_PROTOCOL
+ );
+ if (!EFI_ERROR (Status)) {
+ return EFI_ALREADY_STARTED;
+ }
+
+ //
+ // Test for the Udp6ServiceBinding Protocol
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiUdp6ServiceBindingProtocolGuid,
+ NULL,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_TEST_PROTOCOL
+ );
+
+ return Status;
+}
+
+/**
+ Starts a device controller or a bus controller.
+
+ The Start() function is designed to be invoked from the EFI boot service ConnectController().
+ As a result, much of the error checking on the parameters to Start() has been moved into this
+ common boot service. It is legal to call Start() from other locations,
+ but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+ 1. ControllerHandle must be a valid EFI_HANDLE.
+ 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+ EFI_DEVICE_PATH_PROTOCOL.
+ 3. Prior to calling Start(), the Supported() function for the driver specified by This must
+ have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle The handle of the controller to start. This handle
+ must support a protocol interface that supplies
+ an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
+ parameter is ignored by device drivers, and is optional for bus
+ drivers. For a bus driver, if this parameter is NULL, then handles
+ for all the children of Controller are created by this driver.
+ If this parameter is not NULL and the first Device Path Node is
+ not the End of Device Path Node, then only the handle for the
+ child device specified by the first Device Path Node of
+ RemainingDevicePath is created by this driver.
+ If the first Device Path Node of RemainingDevicePath is
+ the End of Device Path Node, no child handle is created by this
+ driver.
+
+ @retval EFI_SUCCESS The device was started.
+ @retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
+ @retval Others The driver failded to start the device.
+
+**/
+EFI_STATUS
+EFIAPI
+Dns6DriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ DNS_SERVICE *DnsSb;
+ EFI_STATUS Status;
+
+ Status = DnsCreateService (ControllerHandle, This->DriverBindingHandle, IP_VERSION_6, &DnsSb);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ ASSERT (DnsSb != NULL);
+
+ Status = gBS->SetTimer (DnsSb->Timer, TimerPeriodic, TICKS_PER_SECOND);
+ if (EFI_ERROR (Status)) {
+ goto ON_ERROR;
+ }
+
+ //
+ // Install the Dns6ServiceBinding Protocol onto ControllerHandle
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &ControllerHandle,
+ &gEfiDns6ServiceBindingProtocolGuid,
+ &DnsSb->ServiceBinding,
+ NULL
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto ON_ERROR;
+ }
+
+ return EFI_SUCCESS;
+
+ON_ERROR:
+ DnsDestroyService (DnsSb);
+
+ return Status;
+}
+
+/**
+ Stops a device controller or a bus controller.
+
+ The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+ As a result, much of the error checking on the parameters to Stop() has been moved
+ into this common boot service. It is legal to call Stop() from other locations,
+ but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+ 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+ same driver's Start() function.
+ 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+ EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+ Start() function, and the Start() function must have called OpenProtocol() on
+ ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle A handle to the device being stopped. The handle must
+ support a bus specific I/O protocol for the driver
+ to use to stop the device.
+ @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.
+ @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
+ if NumberOfChildren is 0.
+
+ @retval EFI_SUCCESS The device was stopped.
+ @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+Dns6DriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
+ )
+{
+ EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;
+ DNS_SERVICE *DnsSb;
+ EFI_HANDLE NicHandle;
+ EFI_STATUS Status;
+ LIST_ENTRY *List;
+ DNS_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT Context;
+
+ //
+ // DNS driver opens UDP child, So, Controller is a UDP
+ // child handle. Locate the Nic handle first. Then get the
+ // DNS private data back.
+ //
+ NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp6ProtocolGuid);
+
+ if (NicHandle == NULL) {
+ return EFI_SUCCESS;
+ }
+
+ Status = gBS->OpenProtocol (
+ NicHandle,
+ &gEfiDns6ServiceBindingProtocolGuid,
+ (VOID **) &ServiceBinding,
+ This->DriverBindingHandle,
+ NicHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ DnsSb = DNS_SERVICE_FROM_THIS (ServiceBinding);
+
+ if (!IsListEmpty (&DnsSb->Dns6ChildrenList)) {
+ //
+ // Destroy the Dns child instance in ChildHandleBuffer.
+ //
+ List = &DnsSb->Dns6ChildrenList;
+ Context.ServiceBinding = ServiceBinding;
+ Context.NumberOfChildren = NumberOfChildren;
+ Context.ChildHandleBuffer = ChildHandleBuffer;
+ Status = NetDestroyLinkList (
+ List,
+ DnsDestroyChildEntryInHandleBuffer,
+ &Context,
+ NULL
+ );
+ }
+
+ if (NumberOfChildren == 0 && IsListEmpty (&DnsSb->Dns6ChildrenList)) {
+ gBS->UninstallProtocolInterface (
+ NicHandle,
+ &gEfiDns6ServiceBindingProtocolGuid,
+ ServiceBinding
+ );
+
+ DnsDestroyService (DnsSb);
+
+ if (gDnsControllerNameTable != NULL) {
+ FreeUnicodeStringTable (gDnsControllerNameTable);
+ gDnsControllerNameTable = NULL;
+ }
+
+ Status = EFI_SUCCESS;
+ }
+
+ 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] 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 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
+Dns4ServiceBindingCreateChild (
+ IN EFI_SERVICE_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE *ChildHandle
+ )
+{
+ DNS_SERVICE *DnsSb;
+ DNS_INSTANCE *Instance;
+ EFI_STATUS Status;
+ EFI_TPL OldTpl;
+ VOID *Udp4;
+
+ if ((This == NULL) || (ChildHandle == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ DnsSb = DNS_SERVICE_FROM_THIS (This);
+
+ Status = DnsCreateInstance (DnsSb, &Instance);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ ASSERT (Instance != NULL);
+
+ //
+ // Install the DNS protocol onto ChildHandle
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ ChildHandle,
+ &gEfiDns4ProtocolGuid,
+ &Instance->Dns4,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ goto ON_ERROR;
+ }
+
+ Instance->ChildHandle = *ChildHandle;
+
+ //
+ // Open the Udp4 protocol BY_CHILD.
+ //
+ Status = gBS->OpenProtocol (
+ DnsSb->ConnectUdp->UdpHandle,
+ &gEfiUdp4ProtocolGuid,
+ (VOID **) &Udp4,
+ gDns4DriverBinding.DriverBindingHandle,
+ Instance->ChildHandle,
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+ );
+ if (EFI_ERROR (Status)) {
+ gBS->UninstallMultipleProtocolInterfaces (
+ Instance->ChildHandle,
+ &gEfiDns4ProtocolGuid,
+ &Instance->Dns4,
+ NULL
+ );
+
+ goto ON_ERROR;
+ }
+
+ //
+ // Open the Udp4 protocol by child.
+ //
+ Status = gBS->OpenProtocol (
+ Instance->UdpIo->UdpHandle,
+ &gEfiUdp4ProtocolGuid,
+ (VOID **) &Udp4,
+ gDns4DriverBinding.DriverBindingHandle,
+ Instance->ChildHandle,
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // Close the Udp4 protocol.
+ //
+ gBS->CloseProtocol (
+ DnsSb->ConnectUdp->UdpHandle,
+ &gEfiUdp4ProtocolGuid,
+ gDns4DriverBinding.DriverBindingHandle,
+ ChildHandle
+ );
+
+ gBS->UninstallMultipleProtocolInterfaces (
+ Instance->ChildHandle,
+ &gEfiDns4ProtocolGuid,
+ &Instance->Dns4,
+ NULL
+ );
+
+ goto ON_ERROR;
+ }
+
+ //
+ // Add it to the parent's child list.
+ //
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ InsertTailList (&DnsSb->Dns4ChildrenList, &Instance->Link);
+ DnsSb->Dns4ChildrenNum++;
+
+ gBS->RestoreTPL (OldTpl);
+
+ return EFI_SUCCESS;
+
+ON_ERROR:
+
+ DnsDestroyInstance (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
+Dns4ServiceBindingDestroyChild (
+ IN EFI_SERVICE_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ChildHandle
+ )
+{
+ DNS_SERVICE *DnsSb;
+ DNS_INSTANCE *Instance;
+
+ EFI_DNS4_PROTOCOL *Dns4;
+ EFI_STATUS Status;
+ EFI_TPL OldTpl;
+
+ if ((This == NULL) || (ChildHandle == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Retrieve the private context data structures
+ //
+ Status = gBS->OpenProtocol (
+ ChildHandle,
+ &gEfiDns4ProtocolGuid,
+ (VOID **) &Dns4,
+ gDns4DriverBinding.DriverBindingHandle,
+ ChildHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+
+ if (EFI_ERROR (Status)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL4 (Dns4);
+ DnsSb = DNS_SERVICE_FROM_THIS (This);
+
+ if (Instance->Service != DnsSb) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Instance->InDestroy) {
+ return EFI_SUCCESS;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Instance->InDestroy = TRUE;
+
+ //
+ // Close the Udp4 protocol.
+ //
+ gBS->CloseProtocol (
+ DnsSb->ConnectUdp->UdpHandle,
+ &gEfiUdp4ProtocolGuid,
+ gDns4DriverBinding.DriverBindingHandle,
+ ChildHandle
+ );
+
+ gBS->CloseProtocol (
+ Instance->UdpIo->UdpHandle,
+ &gEfiUdp4ProtocolGuid,
+ gDns4DriverBinding.DriverBindingHandle,
+ ChildHandle
+ );
+
+ gBS->RestoreTPL (OldTpl);
+
+ //
+ // Uninstall the DNS protocol first to enable a top down destruction.
+ //
+ Status = gBS->UninstallProtocolInterface (
+ ChildHandle,
+ &gEfiDns4ProtocolGuid,
+ Dns4
+ );
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ if (EFI_ERROR (Status)) {
+ Instance->InDestroy = FALSE;
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+ }
+
+ RemoveEntryList (&Instance->Link);
+ DnsSb->Dns4ChildrenNum--;
+
+ gBS->RestoreTPL (OldTpl);
+
+ DnsDestroyInstance (Instance);
+ return EFI_SUCCESS;
+}
+
+/**
+ 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] 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 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
+Dns6ServiceBindingCreateChild (
+ IN EFI_SERVICE_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE *ChildHandle
+ )
+{
+ DNS_SERVICE *DnsSb;
+ DNS_INSTANCE *Instance;
+ EFI_STATUS Status;
+ EFI_TPL OldTpl;
+ VOID *Udp6;
+
+ if ((This == NULL) || (ChildHandle == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ DnsSb = DNS_SERVICE_FROM_THIS (This);
+
+ Status = DnsCreateInstance (DnsSb, &Instance);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ ASSERT (Instance != NULL);
+
+ //
+ // Install the DNS protocol onto ChildHandle
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ ChildHandle,
+ &gEfiDns6ProtocolGuid,
+ &Instance->Dns6,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ goto ON_ERROR;
+ }
+
+ Instance->ChildHandle = *ChildHandle;
+
+ //
+ // Open the Udp6 protocol BY_CHILD.
+ //
+ Status = gBS->OpenProtocol (
+ DnsSb->ConnectUdp->UdpHandle,
+ &gEfiUdp6ProtocolGuid,
+ (VOID **) &Udp6,
+ gDns6DriverBinding.DriverBindingHandle,
+ Instance->ChildHandle,
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+ );
+ if (EFI_ERROR (Status)) {
+ gBS->UninstallMultipleProtocolInterfaces (
+ Instance->ChildHandle,
+ &gEfiDns6ProtocolGuid,
+ &Instance->Dns6,
+ NULL
+ );
+
+ goto ON_ERROR;
+ }
+
+ //
+ // Open the Udp6 protocol by child.
+ //
+ Status = gBS->OpenProtocol (
+ Instance->UdpIo->UdpHandle,
+ &gEfiUdp6ProtocolGuid,
+ (VOID **) &Udp6,
+ gDns6DriverBinding.DriverBindingHandle,
+ Instance->ChildHandle,
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // Close the Udp6 protocol.
+ //
+ gBS->CloseProtocol (
+ DnsSb->ConnectUdp->UdpHandle,
+ &gEfiUdp6ProtocolGuid,
+ gDns6DriverBinding.DriverBindingHandle,
+ ChildHandle
+ );
+
+ gBS->UninstallMultipleProtocolInterfaces (
+ Instance->ChildHandle,
+ &gEfiDns6ProtocolGuid,
+ &Instance->Dns6,
+ NULL
+ );
+
+ goto ON_ERROR;
+ }
+
+ //
+ // Add it to the parent's child list.
+ //
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ InsertTailList (&DnsSb->Dns6ChildrenList, &Instance->Link);
+ DnsSb->Dns6ChildrenNum++;
+
+ gBS->RestoreTPL (OldTpl);
+
+ return EFI_SUCCESS;
+
+ON_ERROR:
+
+ DnsDestroyInstance (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
+Dns6ServiceBindingDestroyChild (
+ IN EFI_SERVICE_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ChildHandle
+ )
+{
+ DNS_SERVICE *DnsSb;
+ DNS_INSTANCE *Instance;
+
+ EFI_DNS6_PROTOCOL *Dns6;
+ EFI_STATUS Status;
+ EFI_TPL OldTpl;
+
+ if ((This == NULL) || (ChildHandle == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Retrieve the private context data structures
+ //
+ Status = gBS->OpenProtocol (
+ ChildHandle,
+ &gEfiDns6ProtocolGuid,
+ (VOID **) &Dns6,
+ gDns6DriverBinding.DriverBindingHandle,
+ ChildHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+
+ if (EFI_ERROR (Status)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL6 (Dns6);
+ DnsSb = DNS_SERVICE_FROM_THIS (This);
+
+ if (Instance->Service != DnsSb) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Instance->InDestroy) {
+ return EFI_SUCCESS;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Instance->InDestroy = TRUE;
+
+ //
+ // Close the Udp6 protocol.
+ //
+ gBS->CloseProtocol (
+ DnsSb->ConnectUdp->UdpHandle,
+ &gEfiUdp6ProtocolGuid,
+ gDns6DriverBinding.DriverBindingHandle,
+ ChildHandle
+ );
+
+ gBS->CloseProtocol (
+ Instance->UdpIo->UdpHandle,
+ &gEfiUdp6ProtocolGuid,
+ gDns6DriverBinding.DriverBindingHandle,
+ ChildHandle
+ );
+
+ gBS->RestoreTPL (OldTpl);
+
+ //
+ // Uninstall the DNS protocol first to enable a top down destruction.
+ //
+ Status = gBS->UninstallProtocolInterface (
+ ChildHandle,
+ &gEfiDns6ProtocolGuid,
+ Dns6
+ );
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ if (EFI_ERROR (Status)) {
+ Instance->InDestroy = FALSE;
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+ }
+
+ RemoveEntryList (&Instance->Link);
+ DnsSb->Dns6ChildrenNum--;
+
+ gBS->RestoreTPL (OldTpl);
+
+ DnsDestroyInstance (Instance);
+ return EFI_SUCCESS;
+}
|