Remove HTTP IO realted funcitons from HttpBootDxe and use HttpIoLib instead. Signed-off-by: Abner Chang <abner.chang@hpe.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Cc: Nickle Wang <nickle.wang@hpe.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com>
		
			
				
	
	
		
			526 lines
		
	
	
		
			25 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			526 lines
		
	
	
		
			25 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /** @file
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|   UEFI HTTP boot driver's private data structure and interfaces declaration.
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| 
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| Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
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| (C) Copyright 2016 - 2020 Hewlett Packard Enterprise Development LP<BR>
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| SPDX-License-Identifier: BSD-2-Clause-Patent
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| 
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| **/
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| 
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| #ifndef __EFI_HTTP_BOOT_DXE_H__
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| #define __EFI_HTTP_BOOT_DXE_H__
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| 
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| #include <Uefi.h>
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| 
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| #include <IndustryStandard/Http11.h>
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| #include <IndustryStandard/Dhcp.h>
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| 
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| //
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| // Libraries
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| //
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| #include <Library/UefiBootServicesTableLib.h>
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| #include <Library/UefiHiiServicesLib.h>
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| #include <Library/UefiRuntimeServicesTableLib.h>
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| #include <Library/MemoryAllocationLib.h>
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| #include <Library/BaseLib.h>
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| #include <Library/UefiLib.h>
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| #include <Library/DevicePathLib.h>
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| #include <Library/DebugLib.h>
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| #include <Library/NetLib.h>
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| #include <Library/HttpLib.h>
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| #include <Library/HttpIoLib.h>
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| #include <Library/HiiLib.h>
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| #include <Library/PrintLib.h>
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| #include <Library/DpcLib.h>
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| 
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| //
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| // UEFI Driver Model Protocols
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| //
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| #include <Protocol/DriverBinding.h>
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| #include <Protocol/ComponentName2.h>
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| #include <Protocol/ComponentName.h>
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| 
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| //
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| // Consumed Protocols
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| //
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| #include <Protocol/ServiceBinding.h>
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| #include <Protocol/HiiConfigAccess.h>
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| #include <Protocol/NetworkInterfaceIdentifier.h>
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| #include <Protocol/Dhcp4.h>
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| #include <Protocol/Dhcp6.h>
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| #include <Protocol/Dns6.h>
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| #include <Protocol/Http.h>
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| #include <Protocol/Ip4Config2.h>
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| #include <Protocol/Ip6Config.h>
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| #include <Protocol/RamDisk.h>
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| #include <Protocol/AdapterInformation.h>
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| 
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| //
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| // Produced Protocols
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| //
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| #include <Protocol/LoadFile.h>
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| #include <Protocol/HttpBootCallback.h>
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| 
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| //
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| // Consumed Guids
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| //
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| #include <Guid/HttpBootConfigHii.h>
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| 
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| //
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| // Driver Version
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| //
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| #define HTTP_BOOT_DXE_VERSION  0xa
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| 
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| //
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| // Standard Media Types defined in
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| // http://www.iana.org/assignments/media-types
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| //
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| #define HTTP_CONTENT_TYPE_APP_EFI           "application/efi"
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| #define HTTP_CONTENT_TYPE_APP_IMG           "application/vnd.efi-img"
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| #define HTTP_CONTENT_TYPE_APP_ISO           "application/vnd.efi-iso"
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| 
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| //
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| // Protocol instances
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| //
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| extern EFI_DRIVER_BINDING_PROTOCOL  gHttpBootDxeDriverBinding;
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| extern EFI_COMPONENT_NAME2_PROTOCOL gHttpBootDxeComponentName2;
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| extern EFI_COMPONENT_NAME_PROTOCOL  gHttpBootDxeComponentName;
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| 
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| //
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| // Private data structure
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| //
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| typedef struct _HTTP_BOOT_PRIVATE_DATA      HTTP_BOOT_PRIVATE_DATA;
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| typedef struct _HTTP_BOOT_VIRTUAL_NIC       HTTP_BOOT_VIRTUAL_NIC;
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| 
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| typedef enum  {
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|   ImageTypeEfi,
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|   ImageTypeVirtualCd,
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|   ImageTypeVirtualDisk,
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|   ImageTypeMax
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| } HTTP_BOOT_IMAGE_TYPE;
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| 
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| //
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| // Include files with internal function prototypes
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| //
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| #include "HttpBootComponentName.h"
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| #include "HttpBootDhcp4.h"
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| #include "HttpBootDhcp6.h"
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| #include "HttpBootImpl.h"
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| #include "HttpBootSupport.h"
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| #include "HttpBootClient.h"
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| #include "HttpBootConfig.h"
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| 
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| typedef union {
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|   HTTP_BOOT_DHCP4_PACKET_CACHE              Dhcp4;
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|   HTTP_BOOT_DHCP6_PACKET_CACHE              Dhcp6;
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| } HTTP_BOOT_DHCP_PACKET_CACHE;
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| 
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| struct _HTTP_BOOT_VIRTUAL_NIC {
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|   UINT32                                    Signature;
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|   EFI_HANDLE                                Controller;
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|   EFI_HANDLE                                ImageHandle;
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|   EFI_LOAD_FILE_PROTOCOL                    LoadFile;
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|   EFI_DEVICE_PATH_PROTOCOL                  *DevicePath;
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|   HTTP_BOOT_PRIVATE_DATA                    *Private;
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| };
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| 
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| #define HTTP_BOOT_PRIVATE_DATA_FROM_CALLBACK_INFO(Callback) \
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|   CR ( \
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|   Callback, \
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|   HTTP_BOOT_PRIVATE_DATA, \
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|   CallbackInfo, \
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|   HTTP_BOOT_PRIVATE_DATA_SIGNATURE \
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|   )
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| 
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| #define HTTP_BOOT_PRIVATE_DATA_FROM_CALLBACK_PROTOCOL(CallbackProtocol) \
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|     CR ( \
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|     CallbackProtocol, \
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|     HTTP_BOOT_PRIVATE_DATA, \
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|     LoadFileCallback, \
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|     HTTP_BOOT_PRIVATE_DATA_SIGNATURE \
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|     )
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| 
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| struct _HTTP_BOOT_PRIVATE_DATA {
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|   UINT32                                    Signature;
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|   EFI_HANDLE                                Controller;
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| 
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|   HTTP_BOOT_VIRTUAL_NIC                     *Ip4Nic;
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|   HTTP_BOOT_VIRTUAL_NIC                     *Ip6Nic;
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| 
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|   //
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|   // Consumed children
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|   //
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|   EFI_HANDLE                                Ip6Child;
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|   EFI_HANDLE                                Dhcp4Child;
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|   EFI_HANDLE                                Dhcp6Child;
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|   HTTP_IO                                   HttpIo;
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|   BOOLEAN                                   HttpCreated;
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| 
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|   //
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|   // Consumed protocol
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|   //
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|   EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL *Nii;
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|   EFI_IP6_PROTOCOL                          *Ip6;
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|   EFI_IP4_CONFIG2_PROTOCOL                  *Ip4Config2;
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|   EFI_IP6_CONFIG_PROTOCOL                   *Ip6Config;
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|   EFI_DHCP4_PROTOCOL                        *Dhcp4;
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|   EFI_DHCP6_PROTOCOL                        *Dhcp6;
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|   EFI_DEVICE_PATH_PROTOCOL                  *ParentDevicePath;
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| 
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| 
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|   //
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|   // Produced protocol
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|   //
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|   EFI_LOAD_FILE_PROTOCOL                    LoadFile;
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|   EFI_DEVICE_PATH_PROTOCOL                  *DevicePath;
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|   UINT32                                    Id;
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|   EFI_HTTP_BOOT_CALLBACK_PROTOCOL           *HttpBootCallback;
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|   EFI_HTTP_BOOT_CALLBACK_PROTOCOL           LoadFileCallback;
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| 
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|   //
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|   // Data for the default HTTP Boot callback protocol
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|   //
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|   UINT64                                    FileSize;
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|   UINT64                                    ReceivedSize;
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|   UINT32                                    Percentage;
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| 
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|   //
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|   // HII callback info block
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|   //
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|   HTTP_BOOT_FORM_CALLBACK_INFO              CallbackInfo;
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| 
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|   //
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|   // Mode data
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|   //
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|   BOOLEAN                                   UsingIpv6;
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|   BOOLEAN                                   Started;
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|   EFI_IP_ADDRESS                            StationIp;
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|   EFI_IP_ADDRESS                            SubnetMask;
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|   EFI_IP_ADDRESS                            GatewayIp;
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|   EFI_IP_ADDRESS                            ServerIp;
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|   UINT16                                    Port;
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|   UINT32                                    DnsServerCount;
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|   EFI_IP_ADDRESS                            *DnsServerIp;
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| 
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|   //
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|   // The URI string attempt to download through HTTP, may point to
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|   // the memory in cached DHCP offer, or to the memory in FilePathUri.
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|   //
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|   CHAR8                                     *BootFileUri;
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|   VOID                                      *BootFileUriParser;
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|   UINTN                                     BootFileSize;
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|   BOOLEAN                                   NoGateway;
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|   HTTP_BOOT_IMAGE_TYPE                      ImageType;
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| 
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|   //
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|   // URI string extracted from the input FilePath parameter.
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|   //
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|   CHAR8                                     *FilePathUri;
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|   VOID                                      *FilePathUriParser;
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| 
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|   //
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|   // Cached HTTP data
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|   //
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|   LIST_ENTRY                                CacheList;
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| 
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|   //
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|   // Cached DHCP offer
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|   //
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|   // OfferIndex records the index of DhcpOffer[] buffer, and OfferCount records the num of each type of offer.
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|   //
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|   // It supposed that
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|   //
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|   //   OfferNum:    8
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|   //   OfferBuffer: [ProxyNameUri, DhcpNameUri, DhcpIpUri, ProxyNameUri, ProxyIpUri, DhcpOnly, DhcpIpUri, DhcpNameUriDns]
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|   //   (OfferBuffer is 0-based.)
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|   //
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|   // And assume that (DhcpIpUri is the first priority actually.)
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|   //
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|   //   SelectIndex:     5
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|   //   SelectProxyType: HttpOfferTypeProxyIpUri
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|   //   (SelectIndex is 1-based, and 0 means no one is selected.)
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|   //
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|   // So it should be
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|   //
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|   //                 DhcpIpUri  DhcpNameUriDns  DhcpDns  DhcpOnly  ProxyNameUri  ProxyIpUri  DhcpNameUri
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|   //   OfferCount:  [       2,              1,       0,        1,            2,          1,            1]
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|   //
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|   //   OfferIndex: {[       2,              7,       0,        5,            0,         *4,            1]
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|   //                [       6,              0,       0,        0,            3,          0,            0]
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|   //                [       0,              0,       0,        0,            0,          0,            0]
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|   //                ...                                                                                 ]}
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|   //   (OfferIndex is 0-based.)
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|   //
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|   //
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|   UINT32                                    SelectIndex;
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|   UINT32                                    SelectProxyType;
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|   HTTP_BOOT_DHCP_PACKET_CACHE               OfferBuffer[HTTP_BOOT_OFFER_MAX_NUM];
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|   UINT32                                    OfferNum;
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|   UINT32                                    OfferCount[HttpOfferTypeMax];
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|   UINT32                                    OfferIndex[HttpOfferTypeMax][HTTP_BOOT_OFFER_MAX_NUM];
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| };
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| 
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| #define HTTP_BOOT_PRIVATE_DATA_SIGNATURE          SIGNATURE_32 ('H', 'B', 'P', 'D')
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| #define HTTP_BOOT_VIRTUAL_NIC_SIGNATURE           SIGNATURE_32 ('H', 'B', 'V', 'N')
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| #define HTTP_BOOT_PRIVATE_DATA_FROM_LOADFILE(a)   CR (a, HTTP_BOOT_PRIVATE_DATA, LoadFile, HTTP_BOOT_PRIVATE_DATA_SIGNATURE)
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| #define HTTP_BOOT_PRIVATE_DATA_FROM_ID(a)         CR (a, HTTP_BOOT_PRIVATE_DATA, Id, HTTP_BOOT_PRIVATE_DATA_SIGNATURE)
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| #define HTTP_BOOT_VIRTUAL_NIC_FROM_LOADFILE(a)    CR (a, HTTP_BOOT_VIRTUAL_NIC, LoadFile, HTTP_BOOT_VIRTUAL_NIC_SIGNATURE)
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| extern EFI_LOAD_FILE_PROTOCOL               gHttpBootDxeLoadFile;
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| 
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| /**
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|   Tests to see if this driver supports a given controller. If a child device is provided,
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|   it further tests to see if this driver supports creating a handle for the specified child device.
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| 
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|   This function checks to see if the driver specified by This supports the device specified by
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|   ControllerHandle. Drivers will typically use the device path attached to
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|   ControllerHandle and/or the services from the bus I/O abstraction attached to
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|   ControllerHandle to determine if the driver supports ControllerHandle. This function
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|   may be called many times during platform initialization. In order to reduce boot times, the tests
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|   performed by this function must be very small, and take as little time as possible to execute. This
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|   function must not change the state of any hardware devices, and this function must be aware that the
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|   device specified by ControllerHandle may already be managed by the same driver or a
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|   different driver. This function must match its calls to AllocatePages() with FreePages(),
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|   AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
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|   Because ControllerHandle may have been previously started by the same driver, if a protocol is
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|   already in the opened state, then it must not be closed with CloseProtocol(). This is required
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|   to guarantee the state of ControllerHandle is not modified by this function.
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| 
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|   @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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|   @param[in]  ControllerHandle     The handle of the controller to test. This handle
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|                                    must support a protocol interface that supplies
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|                                    an I/O abstraction to the driver.
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|   @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
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|                                    parameter is ignored by device drivers, and is optional for bus
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|                                    drivers. For bus drivers, if this parameter is not NULL, then
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|                                    the bus driver must determine if the bus controller specified
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|                                    by ControllerHandle and the child controller specified
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|                                    by RemainingDevicePath are both supported by this
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|                                    bus driver.
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| 
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|   @retval EFI_SUCCESS              The device specified by ControllerHandle and
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|                                    RemainingDevicePath is supported by the driver specified by This.
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|   @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and
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|                                    RemainingDevicePath is already being managed by the driver
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|                                    specified by This.
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|   @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and
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|                                    RemainingDevicePath is already being managed by a different
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|                                    driver or an application that requires exclusive access.
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|                                    Currently not implemented.
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|   @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
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|                                    RemainingDevicePath is not supported by the driver specified by This.
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| **/
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| EFI_STATUS
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| EFIAPI
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| HttpBootIp4DxeDriverBindingSupported (
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|   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
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|   IN EFI_HANDLE                   ControllerHandle,
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|   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
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|   );
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| 
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| /**
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|   Starts a device controller or a bus controller.
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| 
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|   The Start() function is designed to be invoked from the EFI boot service ConnectController().
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|   As a result, much of the error checking on the parameters to Start() has been moved into this
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|   common boot service. It is legal to call Start() from other locations,
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|   but the following calling restrictions must be followed, or the system behavior will not be deterministic.
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|   1. ControllerHandle must be a valid EFI_HANDLE.
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|   2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
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|      EFI_DEVICE_PATH_PROTOCOL.
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|   3. Prior to calling Start(), the Supported() function for the driver specified by This must
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|      have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
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| 
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|   @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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|   @param[in]  ControllerHandle     The handle of the controller to start. This handle
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|                                    must support a protocol interface that supplies
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|                                    an I/O abstraction to the driver.
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|   @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
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|                                    parameter is ignored by device drivers, and is optional for bus
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|                                    drivers. For a bus driver, if this parameter is NULL, then handles
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|                                    for all the children of Controller are created by this driver.
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|                                    If this parameter is not NULL and the first Device Path Node is
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|                                    not the End of Device Path Node, then only the handle for the
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|                                    child device specified by the first Device Path Node of
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|                                    RemainingDevicePath is created by this driver.
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|                                    If the first Device Path Node of RemainingDevicePath is
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|                                    the End of Device Path Node, no child handle is created by this
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|                                    driver.
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| 
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|   @retval EFI_SUCCESS              The device was started.
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|   @retval EFI_DEVICE_ERROR         The device could not be started due to a device error.Currently not implemented.
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|   @retval EFI_OUT_OF_RESOURCES     The request could not be completed due to a lack of resources.
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|   @retval Others                   The driver failed to start the device.
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| 
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| **/
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| EFI_STATUS
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| EFIAPI
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| HttpBootIp4DxeDriverBindingStart (
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|   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
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|   IN EFI_HANDLE                   ControllerHandle,
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|   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
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|   );
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| 
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| /**
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|   Stops a device controller or a bus controller.
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| 
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|   The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
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|   As a result, much of the error checking on the parameters to Stop() has been moved
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|   into this common boot service. It is legal to call Stop() from other locations,
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|   but the following calling restrictions must be followed, or the system behavior will not be deterministic.
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|   1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
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|      same driver's Start() function.
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|   2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
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|      EFI_HANDLE. In addition, all of these handles must have been created in this driver's
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|      Start() function, and the Start() function must have called OpenProtocol() on
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|      ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
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| 
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|   @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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|   @param[in]  ControllerHandle  A handle to the device being stopped. The handle must
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|                                 support a bus specific I/O protocol for the driver
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|                                 to use to stop the device.
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|   @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.
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|   @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL
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|                                 if NumberOfChildren is 0.
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| 
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|   @retval EFI_SUCCESS           The device was stopped.
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|   @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.
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| 
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| **/
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| EFI_STATUS
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| EFIAPI
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| HttpBootIp4DxeDriverBindingStop (
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|   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
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|   IN EFI_HANDLE                   ControllerHandle,
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|   IN UINTN                        NumberOfChildren,
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|   IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
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|   );
 | |
| 
 | |
| /**
 | |
|   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.
 | |
| 
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|   @retval EFI_SUCCESS              The device specified by ControllerHandle and
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|                                    RemainingDevicePath is supported by the driver specified by This.
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|   @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and
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|                                    RemainingDevicePath is already being managed by the driver
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|                                    specified by This.
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|   @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and
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|                                    RemainingDevicePath is already being managed by a different
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|                                    driver or an application that requires exclusive access.
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|                                    Currently not implemented.
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|   @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
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|                                    RemainingDevicePath is not supported by the driver specified by This.
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| **/
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| EFI_STATUS
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| EFIAPI
 | |
| HttpBootIp6DxeDriverBindingSupported (
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|   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
 | |
|   IN EFI_HANDLE                   ControllerHandle,
 | |
|   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
 | |
|   );
 | |
| 
 | |
| /**
 | |
|   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 failed to start the device.
 | |
| 
 | |
| **/
 | |
| EFI_STATUS
 | |
| EFIAPI
 | |
| HttpBootIp6DxeDriverBindingStart (
 | |
|   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
 | |
|   IN EFI_HANDLE                   ControllerHandle,
 | |
|   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
 | |
|   );
 | |
| 
 | |
| /**
 | |
|   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
 | |
| HttpBootIp6DxeDriverBindingStop (
 | |
|   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
 | |
|   IN EFI_HANDLE                   ControllerHandle,
 | |
|   IN UINTN                        NumberOfChildren,
 | |
|   IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
 | |
|   );
 | |
| #endif
 |