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- /** @file
- Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include "Dhcp4Impl.h"
- #include "Dhcp4Driver.h"
- EFI_DRIVER_BINDING_PROTOCOL gDhcp4DriverBinding = {
- Dhcp4DriverBindingSupported,
- Dhcp4DriverBindingStart,
- Dhcp4DriverBindingStop,
- 0xa,
- NULL,
- NULL
- };
- EFI_SERVICE_BINDING_PROTOCOL mDhcp4ServiceBindingTemplate = {
- Dhcp4ServiceBindingCreateChild,
- Dhcp4ServiceBindingDestroyChild
- };
- /**
- 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.
- Entry point of the DHCP driver to install various protocols.
- @param[in] ImageHandle The firmware allocated handle for the UEFI image.
- @param[in] SystemTable A pointer to the EFI System Table.
- @retval EFI_SUCCESS The operation completed successfully.
- @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
- **/
- EFI_STATUS
- EFIAPI
- Dhcp4DriverEntryPoint (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
- {
- return EfiLibInstallDriverBindingComponentName2 (
- ImageHandle,
- SystemTable,
- &gDhcp4DriverBinding,
- ImageHandle,
- &gDhcp4ComponentName,
- &gDhcp4ComponentName2
- );
- }
- /**
- 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 Protocol instance pointer.
- @param[in] ControllerHandle Handle of device to test
- @param[in] RemainingDevicePath Optional parameter use to pick a specific child
- device to start.
- @retval EFI_SUCCESS This driver supports this device
- @retval EFI_ALREADY_STARTED This driver is already running on this device
- @retval other This driver does not support this device
- **/
- EFI_STATUS
- EFIAPI
- Dhcp4DriverBindingSupported (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
- )
- {
- EFI_STATUS Status;
- Status = gBS->OpenProtocol (
- ControllerHandle,
- &gEfiUdp4ServiceBindingProtocolGuid,
- NULL,
- This->DriverBindingHandle,
- ControllerHandle,
- EFI_OPEN_PROTOCOL_TEST_PROTOCOL
- );
- return Status;
- }
- /**
- Configure the default UDP child to receive all the DHCP traffics
- on this network interface.
- @param[in] UdpIo The UDP IO to configure
- @param[in] Context The context to the function
- @retval EFI_SUCCESS The UDP IO is successfully configured.
- @retval Others Failed to configure the UDP child.
- **/
- EFI_STATUS
- EFIAPI
- DhcpConfigUdpIo (
- IN UDP_IO *UdpIo,
- IN VOID *Context
- )
- {
- EFI_UDP4_CONFIG_DATA UdpConfigData;
- UdpConfigData.AcceptBroadcast = TRUE;
- UdpConfigData.AcceptPromiscuous = FALSE;
- UdpConfigData.AcceptAnyPort = FALSE;
- UdpConfigData.AllowDuplicatePort = TRUE;
- UdpConfigData.TypeOfService = 0;
- UdpConfigData.TimeToLive = 64;
- UdpConfigData.DoNotFragment = FALSE;
- UdpConfigData.ReceiveTimeout = 0;
- UdpConfigData.TransmitTimeout = 0;
- UdpConfigData.UseDefaultAddress = FALSE;
- UdpConfigData.StationPort = DHCP_CLIENT_PORT;
- UdpConfigData.RemotePort = DHCP_SERVER_PORT;
- ZeroMem (&UdpConfigData.StationAddress, sizeof (EFI_IPv4_ADDRESS));
- ZeroMem (&UdpConfigData.SubnetMask, sizeof (EFI_IPv4_ADDRESS));
- ZeroMem (&UdpConfigData.RemoteAddress, sizeof (EFI_IPv4_ADDRESS));
- return UdpIo->Protocol.Udp4->Configure (UdpIo->Protocol.Udp4, &UdpConfigData);
- }
- /**
- Destroy the DHCP service. The Dhcp4 service may be partly initialized,
- or partly destroyed. If a resource is destroyed, it is marked as so in
- case the destroy failed and being called again later.
- @param[in] DhcpSb The DHCP service instance to destroy.
- @retval EFI_SUCCESS Always return success.
- **/
- EFI_STATUS
- Dhcp4CloseService (
- IN DHCP_SERVICE *DhcpSb
- )
- {
- DhcpCleanLease (DhcpSb);
- if (DhcpSb->UdpIo != NULL) {
- UdpIoFreeIo (DhcpSb->UdpIo);
- DhcpSb->UdpIo = NULL;
- }
- if (DhcpSb->Timer != NULL) {
- gBS->SetTimer (DhcpSb->Timer, TimerCancel, 0);
- gBS->CloseEvent (DhcpSb->Timer);
- DhcpSb->Timer = NULL;
- }
- return EFI_SUCCESS;
- }
- /**
- Create a new DHCP service binding instance for the controller.
- @param[in] Controller The controller to install DHCP service binding
- protocol onto
- @param[in] ImageHandle The driver's image handle
- @param[out] Service The variable to receive the created DHCP service
- instance.
- @retval EFI_OUT_OF_RESOURCES Failed to allocate resource .
- @retval EFI_SUCCESS The DHCP service instance is created.
- @retval other Other error occurs.
- **/
- EFI_STATUS
- Dhcp4CreateService (
- IN EFI_HANDLE Controller,
- IN EFI_HANDLE ImageHandle,
- OUT DHCP_SERVICE **Service
- )
- {
- DHCP_SERVICE *DhcpSb;
- EFI_STATUS Status;
- *Service = NULL;
- DhcpSb = AllocateZeroPool (sizeof (DHCP_SERVICE));
- if (DhcpSb == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- DhcpSb->Signature = DHCP_SERVICE_SIGNATURE;
- DhcpSb->ServiceState = DHCP_UNCONFIGED;
- DhcpSb->Controller = Controller;
- DhcpSb->Image = ImageHandle;
- InitializeListHead (&DhcpSb->Children);
- DhcpSb->DhcpState = Dhcp4Stopped;
- DhcpSb->Xid = NET_RANDOM (NetRandomInitSeed ());
- CopyMem (
- &DhcpSb->ServiceBinding,
- &mDhcp4ServiceBindingTemplate,
- sizeof (EFI_SERVICE_BINDING_PROTOCOL)
- );
- //
- // Create various resources, UdpIo, Timer, and get Mac address
- //
- Status = gBS->CreateEvent (
- EVT_NOTIFY_SIGNAL | EVT_TIMER,
- TPL_CALLBACK,
- DhcpOnTimerTick,
- DhcpSb,
- &DhcpSb->Timer
- );
- if (EFI_ERROR (Status)) {
- goto ON_ERROR;
- }
- DhcpSb->UdpIo = UdpIoCreateIo (
- Controller,
- ImageHandle,
- DhcpConfigUdpIo,
- UDP_IO_UDP4_VERSION,
- NULL
- );
- if (DhcpSb->UdpIo == NULL) {
- Status = EFI_OUT_OF_RESOURCES;
- goto ON_ERROR;
- }
- DhcpSb->HwLen = (UINT8)DhcpSb->UdpIo->SnpMode.HwAddressSize;
- DhcpSb->HwType = DhcpSb->UdpIo->SnpMode.IfType;
- CopyMem (&DhcpSb->Mac, &DhcpSb->UdpIo->SnpMode.CurrentAddress, sizeof (DhcpSb->Mac));
- *Service = DhcpSb;
- return EFI_SUCCESS;
- ON_ERROR:
- Dhcp4CloseService (DhcpSb);
- FreePool (DhcpSb);
- return Status;
- }
- /**
- 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 Protocol instance pointer.
- @param[in] ControllerHandle Handle of device to bind driver to
- @param[in] RemainingDevicePath Optional parameter use to pick a specific child
- device to start.
- @retval EFI_SUCCESS This driver is added to ControllerHandle
- @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle
- @retval other This driver does not support this device
- **/
- EFI_STATUS
- EFIAPI
- Dhcp4DriverBindingStart (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
- )
- {
- DHCP_SERVICE *DhcpSb;
- EFI_STATUS Status;
- //
- // First: test for the DHCP4 Protocol
- //
- Status = gBS->OpenProtocol (
- ControllerHandle,
- &gEfiDhcp4ServiceBindingProtocolGuid,
- NULL,
- This->DriverBindingHandle,
- ControllerHandle,
- EFI_OPEN_PROTOCOL_TEST_PROTOCOL
- );
- if (Status == EFI_SUCCESS) {
- return EFI_ALREADY_STARTED;
- }
- Status = Dhcp4CreateService (ControllerHandle, This->DriverBindingHandle, &DhcpSb);
- if (EFI_ERROR (Status)) {
- return Status;
- }
- ASSERT (DhcpSb != NULL);
- //
- // Start the receiving
- //
- Status = UdpIoRecvDatagram (DhcpSb->UdpIo, DhcpInput, DhcpSb, 0);
- if (EFI_ERROR (Status)) {
- goto ON_ERROR;
- }
- Status = gBS->SetTimer (DhcpSb->Timer, TimerPeriodic, TICKS_PER_SECOND);
- if (EFI_ERROR (Status)) {
- goto ON_ERROR;
- }
- //
- // Install the Dhcp4ServiceBinding Protocol onto ControllerHandle
- //
- Status = gBS->InstallMultipleProtocolInterfaces (
- &ControllerHandle,
- &gEfiDhcp4ServiceBindingProtocolGuid,
- &DhcpSb->ServiceBinding,
- NULL
- );
- if (EFI_ERROR (Status)) {
- goto ON_ERROR;
- }
- return Status;
- ON_ERROR:
- Dhcp4CloseService (DhcpSb);
- FreePool (DhcpSb);
- return Status;
- }
- /**
- 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
- Dhcp4DestroyChildEntry (
- IN LIST_ENTRY *Entry,
- IN VOID *Context
- )
- {
- DHCP_PROTOCOL *Instance;
- EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;
- if ((Entry == NULL) || (Context == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
- Instance = NET_LIST_USER_STRUCT_S (Entry, DHCP_PROTOCOL, Link, DHCP_PROTOCOL_SIGNATURE);
- ServiceBinding = (EFI_SERVICE_BINDING_PROTOCOL *)Context;
- return ServiceBinding->DestroyChild (ServiceBinding, Instance->Handle);
- }
- /**
- 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 other This driver was not removed from this device
- **/
- EFI_STATUS
- EFIAPI
- Dhcp4DriverBindingStop (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN UINTN NumberOfChildren,
- IN EFI_HANDLE *ChildHandleBuffer
- )
- {
- EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;
- DHCP_SERVICE *DhcpSb;
- EFI_HANDLE NicHandle;
- EFI_STATUS Status;
- LIST_ENTRY *List;
- UINTN ListLength;
- //
- // DHCP driver opens UDP child, So, the ControllerHandle is the
- // UDP child handle. locate the Nic handle first.
- //
- NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp4ProtocolGuid);
- if (NicHandle == NULL) {
- return EFI_SUCCESS;
- }
- Status = gBS->OpenProtocol (
- NicHandle,
- &gEfiDhcp4ServiceBindingProtocolGuid,
- (VOID **)&ServiceBinding,
- This->DriverBindingHandle,
- NicHandle,
- EFI_OPEN_PROTOCOL_GET_PROTOCOL
- );
- if (EFI_ERROR (Status)) {
- return EFI_DEVICE_ERROR;
- }
- DhcpSb = DHCP_SERVICE_FROM_THIS (ServiceBinding);
- if (!IsListEmpty (&DhcpSb->Children)) {
- //
- // Destroy all the children instances before destroy the service.
- //
- List = &DhcpSb->Children;
- Status = NetDestroyLinkList (
- List,
- Dhcp4DestroyChildEntry,
- ServiceBinding,
- &ListLength
- );
- if (EFI_ERROR (Status) || (ListLength != 0)) {
- Status = EFI_DEVICE_ERROR;
- }
- }
- if ((NumberOfChildren == 0) && !IsListEmpty (&DhcpSb->Children)) {
- Status = EFI_DEVICE_ERROR;
- }
- if ((NumberOfChildren == 0) && IsListEmpty (&DhcpSb->Children)) {
- //
- // Destroy the service itself if no child instance left.
- //
- DhcpSb->ServiceState = DHCP_DESTROY;
- gBS->UninstallProtocolInterface (
- NicHandle,
- &gEfiDhcp4ServiceBindingProtocolGuid,
- ServiceBinding
- );
- Dhcp4CloseService (DhcpSb);
- if (gDhcpControllerNameTable != NULL) {
- FreeUnicodeStringTable (gDhcpControllerNameTable);
- gDhcpControllerNameTable = NULL;
- }
- FreePool (DhcpSb);
- Status = EFI_SUCCESS;
- }
- return Status;
- }
- /**
- Initialize a new DHCP instance.
- @param DhcpSb The dhcp service instance
- @param Instance The dhcp instance to initialize
- **/
- VOID
- DhcpInitProtocol (
- IN DHCP_SERVICE *DhcpSb,
- IN OUT DHCP_PROTOCOL *Instance
- )
- {
- Instance->Signature = DHCP_PROTOCOL_SIGNATURE;
- CopyMem (&Instance->Dhcp4Protocol, &mDhcp4ProtocolTemplate, sizeof (Instance->Dhcp4Protocol));
- InitializeListHead (&Instance->Link);
- Instance->Handle = NULL;
- Instance->Service = DhcpSb;
- Instance->InDestroy = FALSE;
- Instance->CompletionEvent = NULL;
- Instance->RenewRebindEvent = NULL;
- Instance->Token = NULL;
- Instance->UdpIo = NULL;
- Instance->ElaspedTime = 0;
- NetbufQueInit (&Instance->ResponseQueue);
- }
- /**
- 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 This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
- @param ChildHandle Pointer to the handle of the child to create. If it is NULL,
- then a new handle is created. If it is a pointer to an existing UEFI handle,
- then the protocol is added to the existing UEFI handle.
- @retval EFI_SUCCESS The protocol was added to ChildHandle.
- @retval EFI_INVALID_PARAMETER ChildHandle is NULL.
- @retval 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
- Dhcp4ServiceBindingCreateChild (
- IN EFI_SERVICE_BINDING_PROTOCOL *This,
- IN EFI_HANDLE *ChildHandle
- )
- {
- DHCP_SERVICE *DhcpSb;
- DHCP_PROTOCOL *Instance;
- EFI_STATUS Status;
- EFI_TPL OldTpl;
- VOID *Udp4;
- if ((This == NULL) || (ChildHandle == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
- Instance = AllocatePool (sizeof (*Instance));
- if (Instance == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- DhcpSb = DHCP_SERVICE_FROM_THIS (This);
- DhcpInitProtocol (DhcpSb, Instance);
- //
- // Install DHCP4 onto ChildHandle
- //
- Status = gBS->InstallMultipleProtocolInterfaces (
- ChildHandle,
- &gEfiDhcp4ProtocolGuid,
- &Instance->Dhcp4Protocol,
- NULL
- );
- if (EFI_ERROR (Status)) {
- FreePool (Instance);
- return Status;
- }
- Instance->Handle = *ChildHandle;
- //
- // Open the Udp4 protocol BY_CHILD.
- //
- Status = gBS->OpenProtocol (
- DhcpSb->UdpIo->UdpHandle,
- &gEfiUdp4ProtocolGuid,
- (VOID **)&Udp4,
- gDhcp4DriverBinding.DriverBindingHandle,
- Instance->Handle,
- EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
- );
- if (EFI_ERROR (Status)) {
- gBS->UninstallMultipleProtocolInterfaces (
- Instance->Handle,
- &gEfiDhcp4ProtocolGuid,
- &Instance->Dhcp4Protocol,
- NULL
- );
- FreePool (Instance);
- return Status;
- }
- OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- InsertTailList (&DhcpSb->Children, &Instance->Link);
- DhcpSb->NumChildren++;
- gBS->RestoreTPL (OldTpl);
- return EFI_SUCCESS;
- }
- /**
- 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 This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
- @param ChildHandle Handle of the child to destroy
- @retval EFI_SUCCESS The protocol was removed from ChildHandle.
- @retval EFI_UNSUPPORTED ChildHandle does not support the protocol that is being removed.
- @retval EFI_INVALID_PARAMETER Child handle is NULL.
- @retval EFI_ACCESS_DENIED The protocol could not be removed from the ChildHandle
- because its services are being used.
- @retval other The child handle was not destroyed
- **/
- EFI_STATUS
- EFIAPI
- Dhcp4ServiceBindingDestroyChild (
- IN EFI_SERVICE_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ChildHandle
- )
- {
- DHCP_SERVICE *DhcpSb;
- DHCP_PROTOCOL *Instance;
- EFI_DHCP4_PROTOCOL *Dhcp;
- EFI_TPL OldTpl;
- EFI_STATUS Status;
- if ((This == NULL) || (ChildHandle == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
- //
- // Retrieve the private context data structures
- //
- Status = gBS->OpenProtocol (
- ChildHandle,
- &gEfiDhcp4ProtocolGuid,
- (VOID **)&Dhcp,
- gDhcp4DriverBinding.DriverBindingHandle,
- ChildHandle,
- EFI_OPEN_PROTOCOL_GET_PROTOCOL
- );
- if (EFI_ERROR (Status)) {
- return EFI_UNSUPPORTED;
- }
- Instance = DHCP_INSTANCE_FROM_THIS (Dhcp);
- DhcpSb = DHCP_SERVICE_FROM_THIS (This);
- if (Instance->Service != DhcpSb) {
- return EFI_INVALID_PARAMETER;
- }
- //
- // A child can be destroyed more than once. For example,
- // Dhcp4DriverBindingStop will destroy all of its children.
- // when caller driver is being stopped, it will destroy the
- // dhcp child it opens.
- //
- if (Instance->InDestroy) {
- return EFI_SUCCESS;
- }
- OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- Instance->InDestroy = TRUE;
- //
- // Close the Udp4 protocol.
- //
- gBS->CloseProtocol (
- DhcpSb->UdpIo->UdpHandle,
- &gEfiUdp4ProtocolGuid,
- gDhcp4DriverBinding.DriverBindingHandle,
- ChildHandle
- );
- //
- // Uninstall the DHCP4 protocol first to enable a top down destruction.
- //
- gBS->RestoreTPL (OldTpl);
- Status = gBS->UninstallProtocolInterface (
- ChildHandle,
- &gEfiDhcp4ProtocolGuid,
- Dhcp
- );
- OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- if (EFI_ERROR (Status)) {
- Instance->InDestroy = FALSE;
- gBS->RestoreTPL (OldTpl);
- return Status;
- }
- if (DhcpSb->ActiveChild == Instance) {
- DhcpYieldControl (DhcpSb);
- }
- RemoveEntryList (&Instance->Link);
- DhcpSb->NumChildren--;
- if (Instance->UdpIo != NULL) {
- UdpIoCleanIo (Instance->UdpIo);
- gBS->CloseProtocol (
- Instance->UdpIo->UdpHandle,
- &gEfiUdp4ProtocolGuid,
- Instance->Service->Image,
- Instance->Handle
- );
- UdpIoFreeIo (Instance->UdpIo);
- Instance->UdpIo = NULL;
- Instance->Token = NULL;
- }
- gBS->RestoreTPL (OldTpl);
- FreePool (Instance);
- return EFI_SUCCESS;
- }
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