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audk/NetworkPkg/DnsDxe/DnsDriver.c

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/** @file
The driver binding and service binding protocol for DnsDxe driver.
Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#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.
//
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);
ASSERT (Entry != NULL);
ItemCache4 = NET_LIST_USER_STRUCT (Entry, DNS4_CACHE, AllCacheLink);
FreePool (ItemCache4->DnsCache.HostName);
FreePool (ItemCache4->DnsCache.IpAddress);
FreePool (ItemCache4);
}
while (!IsListEmpty (&mDriverData->Dns4ServerList)) {
Entry = NetListRemoveHead (&mDriverData->Dns4ServerList);
ASSERT (Entry != NULL);
ItemServerIp4 = NET_LIST_USER_STRUCT (Entry, DNS4_SERVER_IP, AllServerLink);
FreePool (ItemServerIp4);
}
while (!IsListEmpty (&mDriverData->Dns6CacheList)) {
Entry = NetListRemoveHead (&mDriverData->Dns6CacheList);
ASSERT (Entry != NULL);
ItemCache6 = NET_LIST_USER_STRUCT (Entry, DNS6_CACHE, AllCacheLink);
FreePool (ItemCache6->DnsCache.HostName);
FreePool (ItemCache6->DnsCache.IpAddress);
FreePool (ItemCache6);
}
while (!IsListEmpty (&mDriverData->Dns6ServerList)) {
Entry = NetListRemoveHead (&mDriverData->Dns6ServerList);
ASSERT (Entry != NULL);
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:
EfiLibUninstallDriverBindingComponentName2 (
&gDns6DriverBinding,
&gDnsComponentName,
&gDnsComponentName2
);
Error1:
EfiLibUninstallDriverBindingComponentName2 (
&gDns4DriverBinding,
&gDnsComponentName,
&gDnsComponentName2
);
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 available 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 available 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;
}
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