回复: [edk2-devel] [PATCH] RedfishPkg/RedfishDiscoverDxe: EFI Redfish Discover Protocol

gaoliming gaoliming at byosoft.com.cn
Wed Apr 7 05:20:21 UTC 2021


Abner:
  This is new feature. Can you submit one BZ for it?

Thanks
Liming
> -----邮件原件-----
> 发件人: devel at edk2.groups.io <devel at edk2.groups.io> 代表 Abner Chang
> 发送时间: 2021年3月26日 12:54
> 收件人: devel at edk2.groups.io
> 抄送: Nickle Wang <nickle.wang at hpe.com>; Jiaxin Wu
> <jiaxin.wu at intel.com>; Siyuan Fu <siyuan.fu at intel.com>; Fan Wang
> <fan.wang at intel.com>; Jiewen Yao <jiewen.yao at intel.com>
> 主题: [edk2-devel] [PATCH] RedfishPkg/RedfishDiscoverDxe: EFI Redfish
> Discover Protocol
> 
> EDK2 EFI Redfish Discover Protocol implementation. Refer to UEFI spec 2.9
> section 31.1.
> 
> Signed-off-by: Abner Chang <abner.chang at hpe.com>
> Cc: Nickle Wang <nickle.wang at hpe.com>
> Cc: Jiaxin Wu <jiaxin.wu at intel.com>
> Cc: Siyuan Fu <siyuan.fu at intel.com>
> Cc: Fan Wang <fan.wang at intel.com>
> Cc: Jiewen Yao <jiewen.yao at intel.com>
> ---
>  RedfishPkg/RedfishComponents.dsc.inc          |    3 +-
>  RedfishPkg/Redfish.fdf.inc                    |    3 +-
>  .../RedfishDiscoverDxe/RedfishDiscoverDxe.inf |   55 +
>  .../RedfishDiscoverInternal.h                 |  234 ++
>  RedfishPkg/RedfishDiscoverDxe/ComponentName.c |  218 ++
>  .../RedfishDiscoverDxe/RedfishDiscoverDxe.c   | 1910
> +++++++++++++++++
>  .../RedfishSmbiosHostInterface.c              |  118 +
>  7 files changed, 2539 insertions(+), 2 deletions(-)
>  create mode 100644 RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.inf
>  create mode 100644
> RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverInternal.h
>  create mode 100644 RedfishPkg/RedfishDiscoverDxe/ComponentName.c
>  create mode 100644 RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c
>  create mode 100644
> RedfishPkg/RedfishDiscoverDxe/RedfishSmbiosHostInterface.c
> 
> diff --git a/RedfishPkg/RedfishComponents.dsc.inc
> b/RedfishPkg/RedfishComponents.dsc.inc
> index 08f1d3bc32..6f3b055aba 100644
> --- a/RedfishPkg/RedfishComponents.dsc.inc
> +++ b/RedfishPkg/RedfishComponents.dsc.inc
> @@ -6,7 +6,7 @@
>  # of EDKII Redfish drivers according to the value of flags described in
>  # "RedfishDefines.dsc.inc".
>  #
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
>  #
>  #    SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -17,4 +17,5 @@
>    RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
>    RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
>    RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> +  RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.inf
>  !endif
> diff --git a/RedfishPkg/Redfish.fdf.inc b/RedfishPkg/Redfish.fdf.inc
> index a64fd119a9..205c3101c0 100644
> --- a/RedfishPkg/Redfish.fdf.inc
> +++ b/RedfishPkg/Redfish.fdf.inc
> @@ -5,7 +5,7 @@
>  # by using "!include RedfishPkg/RedfisLibs.fdf.inc" to specify the module
> instances
>  # to be built in the firmware volume.
>  #
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
>  #
>  #    SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -15,4 +15,5 @@
>    INF RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
>    INF RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
>    INF RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> +  INF RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.inf
>  !endif
> diff --git a/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.inf
> b/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.inf
> new file mode 100644
> index 0000000000..345bacf44d
> --- /dev/null
> +++ b/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.inf
> @@ -0,0 +1,55 @@
> +## @file
> +#  Implementation of EFI_REDFISH_DISCOVER_PROTOCOL interfaces.
> +#
> +#  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +#
> +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +##
> +
> +[Defines]
> +  INF_VERSION               = 0x0001001b
> +  BASE_NAME                 = RedfishDiscoverDxe
> +  FILE_GUID                 =
> 28A76FE5-43D7-48A3-9714-C1B7BDD6DFB6
> +  MODULE_TYPE               = UEFI_DRIVER
> +  VERSION_STRING            = 1.0
> +  ENTRY_POINT               = RedfishDiscoverEntryPoint
> +  UNLOAD_IMAGE              = RedfishDiscoverUnload
> +
> +[Packages]
> +  MdePkg/MdePkg.dec
> +  MdeModulePkg/MdeModulePkg.dec
> +  NetworkPkg/NetworkPkg.dec
> +  RedfishPkg/RedfishPkg.dec
> +
> +[Sources]
> +  ComponentName.c
> +  RedfishDiscoverDxe.c
> +  RedfishSmbiosHostInterface.c
> +  RedfishDiscoverInternal.h
> +
> +[LibraryClasses]
> +  BaseLib
> +  BaseMemoryLib
> +  DebugLib
> +  MemoryAllocationLib
> +  PrintLib
> +  RestExLib
> +  UefiLib
> +  UefiBootServicesTableLib
> +  UefiDriverEntryPoint
> +
> +[Protocols]
> +  gEfiRestExServiceBindingProtocolGuid            ## Consuming
> +  gEfiRestExProtocolGuid                          ## Consuming
> +  gEfiTcp4ServiceBindingProtocolGuid              ## Consuming
> +  gEfiTcp4ProtocolGuid                            ## Consuming
> +  gEfiTcp6ServiceBindingProtocolGuid              ## Consuming
> +  gEfiTcp6ProtocolGuid                            ## Consuming
> +  gEfiRedfishDiscoverProtocolGuid                 ## Prodcuing
> +  gEfiSmbiosProtocolGuid                          ## Consuming
> +  gEfiDriverBindingProtocolGuid                   ## Consuming
> +
> +[Pcd]
> +  gEfiRedfishPkgTokenSpaceGuid.PcdRedfishDiscoverAccessModeInBand ##
> CONSUMES
> +
> diff --git a/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverInternal.h
> b/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverInternal.h
> new file mode 100644
> index 0000000000..cf69d9231a
> --- /dev/null
> +++ b/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverInternal.h
> @@ -0,0 +1,234 @@
> +/** @file
> +  This file defines the EFI Redfish Discover Protocol interface.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#ifndef EFI_REDFISH_DISCOVER_INTERNAL_H_
> +#define EFI_REDFISH_DISCOVER_INTERNAL_H_
> +
> +#include <Uefi.h>
> +
> +#include <Protocol/ComponentName.h>
> +#include <Protocol/ComponentName2.h>
> +#include <Protocol/DriverBinding.h>
> +#include <Protocol/RedfishDiscover.h>
> +#include <Protocol/Smbios.h>
> +#include <Protocol/Tcp4.h>
> +#include <Protocol/Tcp6.h>
> +
> +#include <Library/BaseLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/MemoryAllocationLib.h>
> +#include <Library/NetLib.h>
> +#include <Library/PrintLib.h>
> +#include <Library/RestExLib.h>
> +#include <Library/UefiLib.h>
> +#include <Library/UefiBootServicesTableLib.h>
> +#include <Library/UefiDriverEntryPoint.h>
> +
> +#include <IndustryStandard/RedfishHostInterface.h>
> +
> +#define REDFISH_DISCOVER_VERSION  0x00010000
> +#define EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_TPL TPL_NOTIFY
> +
> +//
> +//GUID definitions
> +//
> +
> +#define EFI_REDFISH_DISCOVER_TCP4_INSTANCE_GUID \
> +  { \
> +    0xfbab97a4, 0x4c6a, 0xf8e8, { 0xf2, 0x25, 0x42, 0x8a, 0x80, 0x3f,
0xb6,
> 0xaa } \
> +  }
> +
> +#define EFI_REDFISH_DISCOVER_TCP6_INSTANCE_GUID \
> +  { \
> +    0xbe513b6d, 0x41c1, 0x96Ed, { 0x8d, 0xaf, 0x3e, 0x89, 0xc5, 0xf5,
0x02,
> 0x25 } \
> +  }
> +
> +#define EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_GUID \
> +  { \
> +    0xc44a6076, 0xd42a, 0x4d54, { 0x85, 0x6d, 0x98, 0x8a, 0x85, 0x8f,
0xa1,
> 0x11 } \
> +  }
> +
> +extern EFI_COMPONENT_NAME_PROTOCOL
> gRedfishDiscoverComponentName;
> +extern EFI_COMPONENT_NAME2_PROTOCOL
> gRedfishDiscoverComponentName2;
> +extern EFI_UNICODE_STRING_TABLE
> *gRedfishDiscoverControllerNameTable;
> +
> +//
> +// Enumeration of network protocols
> +// required for the Redfish service discovery.
> +//
> +typedef enum {
> +  ProtocolTypeTcp4 = 0, ///< Network protocol TCPv4.
> +  ProtocolTypeTcp6,     ///< Network protocol TCCv6.
> +  ProtocolTypeRestEx,   ///< REST EX over network protocol.
> +  MaxProtocolType
> +} NETWORK_INTERFACE_PROTOCOL_TYPE;
> +
> +//
> +// Network protocol information installed on
> +// the network interface.
> +//
> +typedef struct {
> +  EFI_GUID ProtocolGuid;                ///< Network protocol GUID.
> +  EFI_GUID ProtocolServiceGuid;         ///< Network protocol service
> GUID.
> +  UINT32   ProtocolDiscoverId;          ///< The identifier installed on
> network protocol handle.
> +  EFI_HANDLE ProtocolControllerHandle;  ///< The controller handle on
> network protocol.
> +  VOID *NetworkProtocolInterface;       ///< The protocol interface of
> network protocol.
> +} REDFISH_DISCOVER_NETWORK_INTERFACE_PROTOCOL;
> +
> +//
> +// Internal structure used to maintain network
> +// interface properties.
> +//
> +typedef struct {
> +  LIST_ENTRY      Entry;                        ///< Link list
> entry.
> +  EFI_HANDLE      OpenDriverAgentHandle;        ///< The agent to
> open network protocol.
> +  EFI_HANDLE      OpenDriverControllerHandle;   ///< The controller
> handle to open network protocol.
> +  UINTN           HwAddressSize;                ///< The size of
> network interface hardware address.
> +  EFI_MAC_ADDRESS MacAddress;                   ///< MAC
> address of network interface.
> +  CHAR16          *StrMacAddr;                  ///< String to
> MAC address of network interface.
> +  BOOLEAN         GotSubnetInfo;                ///< Indicates sub
> net information is retrieved.
> +  EFI_IP_ADDRESS  SubnetAddr;                   ///< Subnet ID.
> +  EFI_IP_ADDRESS  SubnetMask;                   ///< Subnet mask
> (IPv4 only)
> +  UINT8           SubnetPrefixLength;           ///< Subnet prefix.
> +  UINT16          VlanId;                       ///< VLAN ID
> +  UINT32          SubnetAddrInfoIPv6Number;     ///< IPv6 address
> info number.
> +  EFI_IP6_ADDRESS_INFO *SubnetAddrInfoIPv6;     ///< IPv6 address
> info.
> +  //
> +  // Network interface protocol and REST EX infor.
> +  //
> +  UINT32          NetworkProtocolType;          ///< Network
> protocol type. Refer to
> +                                                ///<
> NETWORK_INTERFACE_PROTOCOL_TYPE.
> +  REDFISH_DISCOVER_NETWORK_INTERFACE_PROTOCOL
> NetworkInterfaceProtocolInfo; ///< Network interface protocol information.
> +  EFI_HANDLE      RestExHandle;                 ///< REST EX
> handle associated with this network interface.
> +} EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL;
> +
> +//
> +// Internal structure used to maintain REST EX properties.
> +//
> +typedef struct {
> +    LIST_ENTRY      Entry;                          ///< Link list
> entry.
> +    EFI_HANDLE      OpenDriverAgentHandle;          ///< The
> agent to open network protocol.
> +    EFI_HANDLE      OpenDriverControllerHandle;     ///< The
> controller handle to open network protocol.
> +    EFI_HANDLE      RestExChildHandle;              ///< The child
> handle created throught REST EX Service Protocol.
> +    EFI_HANDLE      RestExControllerHandle;         ///< The
> controller handle which provide REST EX protocol.
> +    EFI_REST_EX_PROTOCOL *RestExProtocolInterface;  ///< Pointer to
> EFI_REST_EX_PROTOCOL.
> +    UINT32          RestExId;                       ///< The
> identifier installed on REST EX controller handle.
> +} EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL;
> +
> +/**
> +  This function to get subnet information.
> +
> +  @param[in]            ImageHandle  EFI handle with this image.
> +  @param[in]            Instance  Instance of Network interface.
> +  @retval EFI_STATUS    Get subnet information successfully.
> +  @retval Otherwise     Fail to get subnet information.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_REDFISH_DISCOVER_GET_SUBNET_INFO)(
> +  IN EFI_HANDLE ImageHandle,
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *Instance
> +);
> +
> +//
> +// The require network protocol matrix.
> +//
> +typedef struct {
> +  UINT32   ProtocolType;                                ///<
> Network protocol type,
> +                                                        ///<
> Refer to NETWORK_INTERFACE_PROTOCOL_TYPE.
> +  CHAR16   *ProtocolName;                               ///<
> Protocol name.
> +  EFI_GUID *RequiredProtocolGuid;                       ///<
> Network protocol interface GUID.
> +  EFI_GUID *RequiredServiceBindingProtocolGuid;         ///< Network
> protocol service GUID.
> +  EFI_GUID *DiscoveredProtocolGuid;                     ///<
> Protocol interface GUID use to install identifier.
> +  EFI_REDFISH_DISCOVER_GET_SUBNET_INFO GetSubnetInfo;   ///<
> Function of getting subnet information.
> +} REDFISH_DISCOVER_REQUIRED_PROTOCOL;
> +
> +//
> +// Link list of Redfish discover instance.
> +//
> +typedef struct {
> +  LIST_ENTRY  NextInstance;                             ///<
> Next list.
> +  EFI_REDFISH_DISCOVERED_INSTANCE *Instance;            ///<
> Pointer to EFI_REDFISH_DISCOVERED_INSTANCE.
> +} EFI_REDFISH_DISCOVERED_INTERNAL_LIST;
> +
> +//
> +// Internal structure of Redfish discover instance.
> +//
> +typedef struct {
> +  LIST_ENTRY  Entry;                                    ///<
> Link list entry.
> +  EFI_HANDLE  Owner;                                    ///<
> The owner owns this Redfish service discovery.
> +                                                        ///<
> It's the EFI image handle of driver uses
> +                                                        ///<
> EFI Redfish Discover Protocol.
> +  EFI_REDFISH_DISCOVER_FLAG DiscoverFlags;              ///<
> EFI_REDFISH_DISCOVER_FLAG
> +  EFI_REDFISH_DISCOVERED_TOKEN *DiscoverToken;          ///<
> Token used to signal when Redfish service is discovered.
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *NetworkInterface; ///<
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> +
> ///< instance used to discover Redfish service.
> +  //
> +  // Below for Host insterface discovery.
> +  //
> +  BOOLEAN         HostIntfValidation;                   ///<
> Indicates whether to validate Redfish Host interface.
> +  EFI_IP_ADDRESS  TargetIpAddress;                      ///<
> Target IP address reported in Redfish Host interface.
> +} EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE;
> +
> +/**
> +  The function adds a new foudn Redfish service to internal list and
> +  notify clinet.
> +
> +  It simply frees the packet.
> +
> +  @param[in]  Instance
> EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE.
> +  @param[in]  RedfishVersion        Redfish version.
> +  @param[in]  RedfishLocation       Redfish location.
> +  @param[in]  Uuid                  Service UUID string.
> +  @param[in]  Os                    OS string.
> +  @param[in]  OsVer                 OS version string.
> +  @param[in]  Product               Product string.
> +  @param[in]  ProductVer            Product verison string.
> +  @param[in]  UseHttps              Redfish service requires secured
> connection.
> +  @retval EFI_SUCCESS               Redfish service is added to list
> successfully.
> +
> +**/
> +EFI_STATUS
> +AddAndSignalNewRedfishService (
> +  IN EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *Instance,
> +  IN UINTN *RedfishVersion OPTIONAL,
> +  IN CHAR8 *RedfishLocation OPTIONAL,
> +  IN CHAR8 *Uuid  OPTIONAL,
> +  IN CHAR8 *Os  OPTIONAL,
> +  IN CHAR8 *OsVer  OPTIONAL,
> +  IN CHAR8 *Product  OPTIONAL,
> +  IN CHAR8 *ProductVer  OPTIONAL,
> +  IN BOOLEAN UseHttps
> +  );
> +
> +/**
> +  The function gets information reported in Redfish Host Interface.
> +
> +  It simply frees the packet.
> +
> +  @param[in]  Smbios           SMBIOS protocol.
> +  @param[out] DeviceDescriptor Pointer to REDFISH_INTERFACE_DATA.
> +  @param[out] ProtocolData     Pointer to
> REDFISH_OVER_IP_PROTOCOL_DATA.
> +
> +  @retval EFI_SUCCESS    Get host interface succesfully.
> +  @retval Otherwise      Fail to tet host interface.
> +
> +**/
> +EFI_STATUS
> +RedfishGetHostInterfaceProtocolData (
> +  IN EFI_SMBIOS_PROTOCOL              *Smbios,
> +  OUT REDFISH_INTERFACE_DATA          **DeviceDescriptor,
> +  OUT REDFISH_OVER_IP_PROTOCOL_DATA   **ProtocolData
> +  );
> +
> +extern EFI_GUID gRedfishDiscoverTcp4Instance;
> +extern EFI_GUID gRedfishDiscoverTcp6Instance;
> +extern EFI_GUID gRedfishDiscoverRestEXInstance;
> +#endif
> diff --git a/RedfishPkg/RedfishDiscoverDxe/ComponentName.c
> b/RedfishPkg/RedfishDiscoverDxe/ComponentName.c
> new file mode 100644
> index 0000000000..adad2504bc
> --- /dev/null
> +++ b/RedfishPkg/RedfishDiscoverDxe/ComponentName.c
> @@ -0,0 +1,218 @@
> +/** @file
> +  Implementation of EFI_COMPONENT_NAME_PROTOCOL and
> EFI_COMPONENT_NAME2_PROTOCOL protocol.
> +  for EFI Refish Discover Protocol
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishDiscoverInternal.h"
> +
> +//
> +// EFI Component Name Functions
> +//
> +/**
> +  Retrieves a Unicode string that is the user-readable name of the EFI
> Driver.
> +
> +  @param[in]  This       A pointer to the
> EFI_COMPONENT_NAME_PROTOCOL instance.
> +  @param[in]  Language   A pointer to a three-character ISO 639-2
> language identifier.
> +                         This is the language of the driver name that
> that the caller
> +                         is requesting, and it must match one of the
> languages specified
> +                         in SupportedLanguages.  The number of
> languages supported by a
> +                         driver is up to the driver writer.
> +  @param[out] DriverName A pointer to the Unicode string to return.
> This Unicode string
> +                         is the name of the driver specified by This in
> the language
> +                         specified by Language.
> +
> +  @retval EFI_SUCCESS           The Unicode string for the Driver
> specified by This
> +                                and the language specified by
> Language was returned
> +                                in DriverName.
> +  @retval EFI_INVALID_PARAMETER Language is NULL.
> +  @retval EFI_INVALID_PARAMETER DriverName is NULL.
> +  @retval EFI_UNSUPPORTED       The driver specified by This does not
> support the
> +                                language specified by Language.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishDiscoverComponentNameGetDriverName (
> +  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
> +  IN  CHAR8                        *Language,
> +  OUT CHAR16                       **DriverName
> +  );
> +
> +/**
> +  Retrieves a Unicode string that is the user readable name of the
controller
> +  that is being managed by an EFI Driver.
> +
> +  @param[in]  This             A pointer to the
> EFI_COMPONENT_NAME_PROTOCOL instance.
> +  @param[in]  ControllerHandle The handle of a controller that the driver
> specified by
> +                               This is managing.  This handle
> specifies the controller
> +                               whose name is to be returned.
> +  @param[in]  ChildHandle      The handle of the child controller to
> retrieve the name
> +                               of.  This is an optional parameter
> that may be NULL.  It
> +                               will be NULL for device drivers.  It
> will also be NULL
> +                               for a bus drivers that wish to retrieve
> the name of the
> +                               bus controller.  It will not be NULL
> for a bus driver
> +                               that wishes to retrieve the name of a
> child controller.
> +  @param[in]  Language         A pointer to a three character ISO
> 639-2 language
> +                               identifier.  This is the language of the
> controller name
> +                               that the caller is requesting, and it
> must match one
> +                               of the languages specified in
> SupportedLanguages.  The
> +                               number of languages supported by a
> driver is up to the
> +                               driver writer.
> +  @param[out]  ControllerName  A pointer to the Unicode string to
> return.  This Unicode
> +                               string is the name of the controller
> specified by
> +                               ControllerHandle and ChildHandle in
> the language specified
> +                               by Language, from the point of view
> of the driver specified
> +                               by This.
> +
> +  @retval EFI_SUCCESS           The Unicode string for the
> user-readable name in the
> +                                language specified by Language for
> the driver
> +                                specified by This was returned in
> DriverName.
> +  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
> +  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a
> valid EFI_HANDLE.
> +  @retval EFI_INVALID_PARAMETER Language is NULL.
> +  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
> +  @retval EFI_UNSUPPORTED       The driver specified by This is not
> currently managing
> +                                the controller specified by
> ControllerHandle and
> +                                ChildHandle.
> +  @retval EFI_UNSUPPORTED       The driver specified by This does not
> support the
> +                                language specified by Language.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishDiscoverComponentNameGetControllerName (
> +  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
> +  IN  EFI_HANDLE                    ControllerHandle,
> +  IN  EFI_HANDLE                    ChildHandle
> OPTIONAL,
> +  IN  CHAR8                         *Language,
> +  OUT CHAR16                        **ControllerName
> +  );
> +
> +
> +///
> +/// Component Name Protocol instance
> +///
> +GLOBAL_REMOVE_IF_UNREFERENCED
> +EFI_COMPONENT_NAME_PROTOCOL  gRedfishDiscoverComponentName
> = {
> +  RedfishDiscoverComponentNameGetDriverName,
> +  RedfishDiscoverComponentNameGetControllerName,
> +  "eng"
> +};
> +
> +///
> +/// Component Name 2 Protocol instance
> +///
> +GLOBAL_REMOVE_IF_UNREFERENCED
> +EFI_COMPONENT_NAME2_PROTOCOL
> gRedfishDiscoverComponentName2 = {
> +  (EFI_COMPONENT_NAME2_GET_DRIVER_NAME)
> RedfishDiscoverComponentNameGetDriverName,
> +  (EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME)
> RedfishDiscoverComponentNameGetControllerName,
> +  "en"
> +};
> +
> +///
> +/// Table of driver names
> +///
> +GLOBAL_REMOVE_IF_UNREFERENCED
> +EFI_UNICODE_STRING_TABLE mRedfishDiscoverDriverNameTable[] = {
> +  { "eng;en", (CHAR16 *)L"Redfish Discover UEFI Driver" },
> +  { NULL, NULL }
> +};
> +
> +GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE
> *gRedfishDiscoverControllerNameTable = NULL;
> +
> +/**
> +  Retrieves a Unicode string that is the user-readable name of the EFI
> Driver.
> +
> +  @param[in]  This        A pointer to the
> EFI_COMPONENT_NAME_PROTOCOL instance.
> +  @param[in]  Language    A pointer to a three-character ISO 639-2
> language identifier.
> +                          This is the language of the driver name that
> that the caller
> +                          is requesting, and it must match one of the
> languages specified
> +                          in SupportedLanguages.  The number of
> languages supported by a
> +                          driver is up to the driver writer.
> +  @param[out]  DriverName A pointer to the Unicode string to return.
> This Unicode string
> +                          is the name of the driver specified by This in
> the language
> +                          specified by Language.
> +
> +  @retval EFI_SUCCESS           The Unicode string for the Driver
> specified by This
> +                                and the language specified by
> Language was returned
> +                                in DriverName.
> +  @retval EFI_INVALID_PARAMETER Language is NULL.
> +  @retval EFI_INVALID_PARAMETER DriverName is NULL.
> +  @retval EFI_UNSUPPORTED       The driver specified by This does not
> support the
> +                                language specified by Language.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishDiscoverComponentNameGetDriverName (
> +  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
> +  IN  CHAR8                        *Language,
> +  OUT CHAR16                       **DriverName
> +  )
> +{
> +  return LookupUnicodeString2 (
> +           Language,
> +           This->SupportedLanguages,
> +           mRedfishDiscoverDriverNameTable,
> +           DriverName,
> +           (BOOLEAN)(This == &gRedfishDiscoverComponentName)
> +           );
> +}
> +
> +/**
> +  Retrieves a Unicode string that is the user readable name of the
controller
> +  that is being managed by an EFI Driver.
> +
> +  @param[in]  This             A pointer to the
> EFI_COMPONENT_NAME_PROTOCOL instance.
> +  @param[in]  ControllerHandle The handle of a controller that the driver
> specified by
> +                               This is managing.  This handle
> specifies the controller
> +                               whose name is to be returned.
> +  @param[in]  ChildHandle      The handle of the child controller to
> retrieve the name
> +                               of.  This is an optional parameter
> that may be NULL.  It
> +                               will be NULL for device drivers.  It
> will also be NULL
> +                               for a bus drivers that wish to retrieve
> the name of the
> +                               bus controller.  It will not be NULL
> for a bus driver
> +                               that wishes to retrieve the name of a
> child controller.
> +  @param[in]  Language         A pointer to a three character ISO
> 639-2 language
> +                               identifier.  This is the language of the
> controller name
> +                               that the caller is requesting, and it
> must match one
> +                               of the languages specified in
> SupportedLanguages.  The
> +                               number of languages supported by a
> driver is up to the
> +                              driver writer.
> +  @param[out]  ControllerName  A pointer to the Unicode string to
> return.  This Unicode
> +                               string is the name of the controller
> specified by
> +                               ControllerHandle and ChildHandle in
> the language specified
> +                               by Language, from the point of view
> of the driver specified
> +                               by This.
> +
> +  @retval EFI_SUCCESS           The Unicode string for the
> user-readable name in the
> +                                language specified by Language for
> the driver
> +                                specified by This was returned in
> DriverName.
> +  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
> +  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a
> valid EFI_HANDLE.
> +  @retval EFI_INVALID_PARAMETER Language is NULL.
> +  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
> +  @retval EFI_UNSUPPORTED       The driver specified by This is not
> currently managing
> +                                the controller specified by
> ControllerHandle and
> +                                ChildHandle.
> +  @retval EFI_UNSUPPORTED       The driver specified by This does not
> support the
> +                                language specified by Language.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishDiscoverComponentNameGetControllerName (
> +  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
> +  IN  EFI_HANDLE                    ControllerHandle,
> +  IN  EFI_HANDLE                    ChildHandle
> OPTIONAL,
> +  IN  CHAR8                         *Language,
> +  OUT CHAR16                        **ControllerName
> +  )
> +{
> +  return EFI_UNSUPPORTED;
> +}
> diff --git a/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c
> b/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c
> new file mode 100644
> index 0000000000..80d70a4679
> --- /dev/null
> +++ b/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c
> @@ -0,0 +1,1910 @@
> +/** @file
> +
> +  The implementation of EFI Redfidh Discover Protocol.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishDiscoverInternal.h"
> +
> +LIST_ENTRY mRedfishDiscoverList;
> +LIST_ENTRY mRedfishInstanceList;
> +EFI_SMBIOS_PROTOCOL *mSmbios = NULL;
> +
> +UINTN mNumNetworkInterface = 0;
> +UINTN mNumRestExInstance = 0;
> +LIST_ENTRY mEfiRedfishDiscoverNetworkInterface;
> +LIST_ENTRY mEfiRedfishDiscoverRestExInstance;
> +
> +EFI_GUID mRedfishDiscoverTcp4InstanceGuid =
> EFI_REDFISH_DISCOVER_TCP4_INSTANCE_GUID;
> +EFI_GUID mRedfishDiscoverTcp6InstanceGuid =
> EFI_REDFISH_DISCOVER_TCP6_INSTANCE_GUID;
> +EFI_GUID mRedfishDiscoverRestExInstanceGuid =
> EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_GUID;
> +
> +EFI_HANDLE EfiRedfishDiscoverProtocolHandle = NULL;
> +
> +EFI_STATUS
> +EFIAPI
> +Tcp4GetSubnetInfo (
> +  IN EFI_HANDLE ImageHandle,
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *Instance
> +);
> +
> +EFI_STATUS
> +EFIAPI
> +Tcp6GetSubnetInfo (
> +  IN EFI_HANDLE ImageHandle,
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *Instance
> +);
> +
> +static REDFISH_DISCOVER_REQUIRED_PROTOCOL gRequiredProtocol[] = {
> +  {
> +    ProtocolTypeTcp4,
> +    L"TCP4 Service Binding Protocol",
> +    &gEfiTcp4ProtocolGuid,
> +    &gEfiTcp4ServiceBindingProtocolGuid,
> +    &mRedfishDiscoverTcp4InstanceGuid,
> +    Tcp4GetSubnetInfo
> +  },
> +  {
> +    ProtocolTypeTcp6,
> +    L"TCP6 Service Binding Protocol",
> +    &gEfiTcp6ProtocolGuid,
> +    &gEfiTcp6ServiceBindingProtocolGuid,
> +    &mRedfishDiscoverTcp6InstanceGuid,
> +    Tcp6GetSubnetInfo
> +  },
> +  {
> +    ProtocolTypeRestEx,
> +    L"REST EX Service Binding Protocol",
> +    &gEfiRestExProtocolGuid,
> +    &gEfiRestExServiceBindingProtocolGuid,
> +    &mRedfishDiscoverRestExInstanceGuid,
> +    NULL
> +  }
> +};
> +
> +/**
> +  This function creates REST EX instance for the found Resfish service.
> +  by known owner handle.
> +
> +  @param[in]    Instance
> EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE
> +  @param[in]    Token           Client token.
> +
> +  @retval NULL  Instance not found.
> +  @retval EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE The instance
> owned by this owner.
> +
> +**/
> +EFI_STATUS
> +CreateRestExInstance (
> +  IN EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *Instance,
> +  IN EFI_REDFISH_DISCOVERED_TOKEN *Token
> +  )
> +{
> +  EFI_STATUS Status;
> +
> +  Status = RestExLibCreateChild (
> +            Instance->Owner,
> +            FixedPcdGetBool (PcdRedfishDiscoverAccessModeInBand)?
> EfiRestExServiceInBandAccess: EfiRestExServiceOutOfBandAccess,
> +            EfiRestExConfigHttp,
> +            EfiRestExServiceRedfish,
> +
> &Token->DiscoverList.RedfishInstances->Information.RedfishRestExHandle
> +            );
> +  return Status;
> +}
> +
> +/**
> +  This function gets EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE
> +  by known owner handle.
> +
> +  @param[in]    ImageHandle             Image handle owns
> EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE.
> +  @param[in]    TargetNetworkInterface  Target network interface used
> by this EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE.
> +  @param[in]    DiscoverFlags
> EFI_REDFISH_DISCOVER_FLAG
> +
> +  @retval NULL  Instance not found.
> +  @retval EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE The instance
> owned by this owner.
> +
> +**/
> +EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *
> +GetInstanceByOwner (
> +  IN EFI_HANDLE ImageHandle,
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *TargetNetworkInterface,
> +  IN EFI_REDFISH_DISCOVER_FLAG DiscoverFlags
> +  )
> +{
> +  EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *ThisInstance;
> +
> +  if (IsListEmpty (&mRedfishDiscoverList)) {
> +    return NULL;
> +  }
> +  ThisInstance =
> +    (EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *)GetFirstNode
> (&mRedfishDiscoverList);
> +  while (TRUE) {
> +    if ((ThisInstance->Owner == ImageHandle) &&
> +         (ThisInstance->DiscoverFlags == DiscoverFlags) &&
> +         (ThisInstance->NetworkInterface == TargetNetworkInterface)) {
> +      return ThisInstance;
> +    }
> +    if (IsNodeAtEnd (&mRedfishDiscoverList, &ThisInstance->Entry)) {
> +      break;
> +    }
> +    ThisInstance =
> +      (EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *)GetNextNode
> (&mRedfishDiscoverList, &ThisInstance->Entry);
> +  };
> +  return NULL;
> +}
> +
> +/**
> +  This function gets the subnet information of this TCP4 instance.
> +
> +  @param[in]            ImageHandle  EFI handle with this image.
> +  @param[in]            Instance  Instance of Network interface.
> +  @retval EFI_STATUS    Get subnet information successfully.
> +  @retval Otherwise     Fail to get subnet information.
> +**/
> +EFI_STATUS
> +EFIAPI
> +Tcp4GetSubnetInfo (
> +  IN EFI_HANDLE ImageHandle,
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *Instance
> +)
> +{
> +  EFI_STATUS Status;
> +  EFI_TCP4_PROTOCOL *Tcp4;
> +  EFI_TCP4_CONFIG_DATA Tcp4CfgData;
> +  EFI_TCP4_OPTION Tcp4Option;
> +  EFI_IP4_MODE_DATA IpModedata;
> +  UINT8 SubnetMaskIndex;
> +  UINT8 BitMask;
> +  UINT8 PrefixLength;
> +  BOOLEAN GotPrefixLength;
> +
> +  if (Instance == NULL) {
> +    return EFI_INVALID_PARAMETER;
> +  }
> +  Tcp4 = (EFI_TCP4_PROTOCOL
> *)Instance->NetworkInterfaceProtocolInfo.NetworkProtocolInterface;
> +
> +  ZeroMem ((VOID *)&Tcp4CfgData, sizeof (EFI_TCP4_CONFIG_DATA));
> +  ZeroMem ((VOID *)&Tcp4Option, sizeof (EFI_TCP4_OPTION));
> +  // Give a local host IP address just for getting subnet information.
> +  Tcp4CfgData.AccessPoint.UseDefaultAddress = TRUE;
> +  Tcp4CfgData.AccessPoint.RemoteAddress.Addr [0] = 127;
> +  Tcp4CfgData.AccessPoint.RemoteAddress.Addr [1] = 0;
> +  Tcp4CfgData.AccessPoint.RemoteAddress.Addr [2] = 0;
> +  Tcp4CfgData.AccessPoint.RemoteAddress.Addr [3] = 1;
> +  Tcp4CfgData.AccessPoint.RemotePort  = 80;
> +  Tcp4CfgData.AccessPoint.ActiveFlag  = TRUE;
> +
> +  Tcp4CfgData.ControlOption = &Tcp4Option;
> +  Tcp4Option.ReceiveBufferSize      = 65535;
> +  Tcp4Option.SendBufferSize         = 65535;
> +  Tcp4Option.MaxSynBackLog          = 5;
> +  Tcp4Option.ConnectionTimeout      = 60;
> +  Tcp4Option.DataRetries            = 12;
> +  Tcp4Option.FinTimeout             = 2;
> +  Tcp4Option.KeepAliveProbes        = 6;
> +  Tcp4Option.KeepAliveTime          = 7200;
> +  Tcp4Option.KeepAliveInterval      = 30;
> +  Tcp4Option.EnableNagle            = TRUE;
> +  Status = Tcp4->Configure (Tcp4, &Tcp4CfgData);
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Can't get subnet information\n",
> __FUNCTION__));
> +    return Status;
> +  }
> +  Status = Tcp4->GetModeData (Tcp4, NULL, NULL, &IpModedata, NULL,
> NULL);
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Can't get IP mode data information\n",
> __FUNCTION__));
> +    return Status;
> +  }
> +  IP4_COPY_ADDRESS (&Instance->SubnetMask,
> &IpModedata.ConfigData.SubnetMask);
> +  Instance->SubnetAddr.v4.Addr [0] =
> IpModedata.ConfigData.StationAddress.Addr [0] &
> Instance->SubnetMask.v4.Addr [0];
> +  Instance->SubnetAddr.v4.Addr [1] =
> IpModedata.ConfigData.StationAddress.Addr [1] &
> Instance->SubnetMask.v4.Addr [1];
> +  Instance->SubnetAddr.v4.Addr [2] =
> IpModedata.ConfigData.StationAddress.Addr [2] &
> Instance->SubnetMask.v4.Addr [2];
> +  Instance->SubnetAddr.v4.Addr [3] =
> IpModedata.ConfigData.StationAddress.Addr [3] &
> Instance->SubnetMask.v4.Addr [3];
> +  //
> +  // Calculate the subnet mask prefix.
> +  //
> +  GotPrefixLength = FALSE;
> +  PrefixLength = 0;
> +  SubnetMaskIndex = 0;
> +  while (GotPrefixLength == FALSE && SubnetMaskIndex < 4) {
> +    BitMask = 0x80;
> +    while (BitMask != 0) {
> +      if ((Instance->SubnetMask.v4.Addr [SubnetMaskIndex] & BitMask) !=
> 0) {
> +        PrefixLength ++;
> +      } else {
> +        GotPrefixLength = TRUE;
> +        break;
> +      }
> +      BitMask = BitMask >> 1;
> +    };
> +    SubnetMaskIndex ++;
> +  };
> +  Instance->SubnetPrefixLength = PrefixLength;
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This function gets the subnet information of this TCP6 instance.
> +
> +  @param[in]            ImageHandle  EFI handle with this image.
> +  @param[in]            Instance  Instance of Network interface.
> +  @retval EFI_STATUS    Get subnet information successfully.
> +  @retval Otherwise     Fail to get subnet information.
> +**/
> +EFI_STATUS
> +EFIAPI
> +Tcp6GetSubnetInfo (
> +  IN EFI_HANDLE ImageHandle,
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *Instance
> +)
> +{
> +  EFI_STATUS Status;
> +  EFI_TCP6_PROTOCOL *Tcp6;
> +  EFI_IP6_MODE_DATA IpModedata;
> +
> +  if (Instance == NULL) {
> +    return EFI_INVALID_PARAMETER;
> +  }
> +  Tcp6 = (EFI_TCP6_PROTOCOL
> *)Instance->NetworkInterfaceProtocolInfo.NetworkProtocolInterface;
> +
> +  Status = Tcp6->GetModeData (Tcp6, NULL, NULL, &IpModedata, NULL,
> NULL);
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Can't get IP mode data information\n"));
> +    return Status;
> +  }
> +  if (IpModedata.AddressCount == 0) {
> +    DEBUG ((DEBUG_INFO, "%a: No IPv6 address configured.\n"));
> +  }
> +  if (Instance->SubnetAddrInfoIPv6 != NULL) {
> +    FreePool (Instance->SubnetAddrInfoIPv6);
> +  }
> +  Instance->SubnetAddrInfoIPv6 = AllocateZeroPool
> (IpModedata.AddressCount * sizeof (EFI_IP6_ADDRESS_INFO));
> +  if (Instance->SubnetAddrInfoIPv6 == NULL) {
> +    DEBUG ((DEBUG_ERROR, "%a: Failed to allocate memory fir IPv6
> subnet address information\n"));
> +    return EFI_OUT_OF_RESOURCES;
> +  }
> +  Instance->SubnetAddrInfoIPv6Number = IpModedata.AddressCount;
> +  CopyMem (
> +    (VOID *)Instance->SubnetAddrInfoIPv6,
> +    (VOID *)&IpModedata.AddressList,
> +    IpModedata.AddressCount * sizeof (EFI_IP6_ADDRESS_INFO)
> +    );
> +  FreePool (IpModedata.AddressList);
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This function searches
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> +  instance with the given
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE.
> +
> +  @param[in] TargetNetworkInterface
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE.
> +                                     NULL for all
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACEs.
> +
> +  @retval Non-NULL
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL is returned.
> +  @retval NULL      Non of
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL instance is
> returned.
> +**/
> +EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *
> +GetTargetNetworkInterfaceInternal (
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> *TargetNetworkInterface
> +  )
> +{
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface;
> +
> +  ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
> +  while (TRUE) {
> +    if (CompareMem((VOID *)&ThisNetworkInterface->MacAddress,
> &TargetNetworkInterface->MacAddress,
> ThisNetworkInterface->HwAddressSize) == 0) {
> +      return ThisNetworkInterface;
> +    }
> +    if (IsNodeAtEnd (&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry)) {
> +      return NULL;
> +    }
> +    ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)GetNextNode(&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry);
> +  };
> +  return NULL;
> +}
> +
> +/**
> +  This function validate if target network interface is ready for
discovering
> +  Redfish service.
> +
> +  @param[in] TargetNetworkInterface
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE.
> +                                     NULL for all
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACEs.
> +  @param[in] Flags                   EFI_REDFISH_DISCOVER_FLAG
> +
> +  @retval EFI_SUCCESS     Target network interface is ready to use.
> +  @retval EFI_UNSUPPORTED Target network interface is not ready to use.
> +**/
> +EFI_STATUS
> +ValidateTargetNetworkInterface (
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> *TargetNetworkInterface,
> +  IN EFI_REDFISH_DISCOVER_FLAG Flags
> +  )
> +{
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface;
> +
> +  if (IsListEmpty (&mEfiRedfishDiscoverNetworkInterface) &&
> TargetNetworkInterface == NULL) {
> +    return EFI_UNSUPPORTED;
> +  }
> +  if (TargetNetworkInterface == NULL) {
> +    return EFI_SUCCESS; // Return EFI_SUCCESS if no network interface is
> specified.
> +  }
> +
> +  ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)GetFirstNode(&mEfiRedfishDiscoverNetworkInterface);
> +  while (TRUE) {
> +    if (CompareMem((VOID *)&ThisNetworkInterface->MacAddress,
> &TargetNetworkInterface->MacAddress,
> ThisNetworkInterface->HwAddressSize) == 0) {
> +      break;
> +    }
> +    if (IsNodeAtEnd (&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry)) {
> +      return EFI_UNSUPPORTED;
> +    }
> +    ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)GetNextNode(&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry);
> +  };
> +  if ((Flags & EFI_REDFISH_DISCOVER_SSDP) != 0) {
> +    // Validate if UDP4/6 is supported on the given network interface.
> +    // SSDP is not supported.
> +
> +    return EFI_SUCCESS;
> +  }
> +  if
> (ThisNetworkInterface->NetworkInterfaceProtocolInfo.ProtocolControllerHan
> dle == NULL) {
> +    return EFI_UNSUPPORTED; // The required protocol on this network
> interface is not found.
> +  }
> +  return EFI_SUCCESS;
> +}
> +/**
> +  This function returns number of network interface instance.
> +
> +  @retval UINTN  Number of network interface instances.
> +**/
> +UINTN
> +NumberOfNetworkInterface (VOID)
> +{
> +  UINTN Num;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface;
> +
> +  if (IsListEmpty (&mEfiRedfishDiscoverNetworkInterface)) {
> +    return 0;
> +  }
> +
> +  Num = 1;
> +  ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
> +  while (TRUE) {
> +    if (IsNodeAtEnd (&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry)) {
> +      break;
> +    }
> +    ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)GetNextNode(&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry);
> +    Num ++;
> +  };
> +  return Num;
> +}
> +
> +/**
> +  This function checks the  IP version supported on this
> +  netwoek interface.
> +
> +  @param[in]    ThisNetworkInterface
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> +
> +  @retval TRUE  Is IPv6, otherwise IPv4.
> +
> +**/
> +BOOLEAN
> +CheckIsIpVersion6 (
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface
> +)
> +{
> +  if (ThisNetworkInterface->NetworkProtocolType == ProtocolTypeTcp6) {
> +    return TRUE;
> +  }
> +  return FALSE;
> +}
> +
> +/**
> +  This function discover Redfish service through SMBIOS host interface.
> +
> +  @param[in]    Instance
> EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE
> +
> +  @retval EFI_SUCCESS        Redfish service is discovered through
> SMBIOS Host interface.
> +  @retval Others             Fail to discover Redfish service throught
> SMBIOS host interface
> +
> +**/
> +EFI_STATUS
> +DiscoverRedfishHostInterface (IN
> EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *Instance)
> +{
> +  EFI_STATUS Status;
> +  REDFISH_OVER_IP_PROTOCOL_DATA *Data;
> +  REDFISH_INTERFACE_DATA  *DeviceDescriptor;
> +  CHAR8 UuidStr[sizeof"00000000-0000-0000-0000-000000000000" + 1];
> +  CHAR16 Ipv6Str [sizeof"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff" + 1];
> +  CHAR8 RedfishServiceLocateStr
[sizeof"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff" + 1];
> +  UINTN StrSize;
> +  UINTN MacCompareStstus;
> +  BOOLEAN IsHttps;
> +
> +  Data = NULL;
> +  DeviceDescriptor = NULL;
> +
> +  if (mSmbios == NULL) {
> +    Status = gBS->LocateProtocol(&gEfiSmbiosProtocolGuid, NULL, (VOID
> **)&mSmbios);
> +    if (EFI_ERROR (Status)) {
> +      return Status;
> +    }
> +  }
> +  Status = RedfishGetHostInterfaceProtocolData (mSmbios,
> &DeviceDescriptor, &Data); // Search for SMBIOS type 42h
> +  if (!EFI_ERROR (Status) && Data != NULL && DeviceDescriptor != NULL) {
> +    //
> +    // Chceck if we can reach out Redfish service using this network
> interface.
> +    // Check with MAC address using Device Descroptor Data Device Type
> 04 and Type 05.
> +    // Those two types of Redfish host interface device has MAC
> information.
> +    //
> +    if (DeviceDescriptor->DeviceType ==
> REDFISH_HOST_INTERFACE_DEVICE_TYPE_PCI_PCIE_V2) {
> +      MacCompareStstus =
> CompareMem(&Instance->NetworkInterface->MacAddress,
> &DeviceDescriptor->DeviceDescriptor.PciPcieDeviceV2.MacAddress, 6);
> +    } else if (DeviceDescriptor->DeviceType ==
> REDFISH_HOST_INTERFACE_DEVICE_TYPE_USB_V2){
> +      MacCompareStstus =
> CompareMem(&Instance->NetworkInterface->MacAddress,
> &DeviceDescriptor->DeviceDescriptor.UsbDeviceV2.MacAddress, 6);
> +    } else {
> +      return EFI_UNSUPPORTED;
> +    }
> +    if (MacCompareStstus != 0) {
> +      return EFI_UNSUPPORTED;
> +    }
> +
> +    if (Data->RedfishServiceIpAddressFormat == 1) {
> +      IP4_COPY_ADDRESS ((VOID *)&Instance->TargetIpAddress.v4, (VOID
> *)Data->RedfishServiceIpAddress);
> +    } else {
> +      IP6_COPY_ADDRESS ((VOID *)&Instance->TargetIpAddress.v6, (VOID
> *)Data->RedfishServiceIpAddress);
> +    }
> +
> +    if (Instance->HostIntfValidation) {
> +      DEBUG ((DEBUG_ERROR,"%a:Send UPnP unicast SSDP to validate
> this Redfish Host Interface is not supported.\n", __FUNCTION__));
> +      Status = EFI_UNSUPPORTED;
> +    } else {
> +      //
> +      // Add this istance to list without detial information of Redfish
> +      // service.
> +      //
> +      IsHttps = FALSE;
> +      if (Data->RedfishServiceIpPort == 443) {
> +        IsHttps = TRUE;
> +      }
> +      StrSize = sizeof(UuidStr);
> +      AsciiSPrint(UuidStr, StrSize, "%g", &Data->ServiceUuid);
> +      //
> +      // Generate Redfish service location string.
> +      //
> +      if (Data->RedfishServiceIpAddressFormat ==
> REDFISH_HOST_INTERFACE_HOST_IP_ADDRESS_FORMAT_IP6) {
> +        NetLibIp6ToStr((IPv6_ADDRESS *)&Data->RedfishServiceIpAddress,
> Ipv6Str, sizeof (Ipv6Str));
> +        if (Data->RedfishServiceIpPort == 0 || IsHttps == TRUE) {
> +            AsciiSPrintUnicodeFormat (
> +              RedfishServiceLocateStr,
> +              sizeof (RedfishServiceLocateStr),
> +              L"%s",
> +              Ipv6Str
> +            );
> +        } else {
> +            AsciiSPrintUnicodeFormat(
> +              RedfishServiceLocateStr,
> +              sizeof (RedfishServiceLocateStr),
> +              L"[%s]:%d",
> +              Ipv6Str,
> +              Data->RedfishServiceIpPort
> +            );
> +        }
> +      } else {
> +        if (Data->RedfishServiceIpPort == 0 || IsHttps == TRUE) {
> +          AsciiSPrint(
> +            RedfishServiceLocateStr,
> +            sizeof (RedfishServiceLocateStr),
> +            "%d.%d.%d.%d",
> +            Data->RedfishServiceIpAddress [0],
> +            Data->RedfishServiceIpAddress [1],
> +            Data->RedfishServiceIpAddress [2],
> +            Data->RedfishServiceIpAddress [3]
> +            );
> +        } else {
> +          AsciiSPrint(
> +            RedfishServiceLocateStr,
> +            sizeof (RedfishServiceLocateStr),
> +            "%d.%d.%d.%d:%d",
> +            Data->RedfishServiceIpAddress [0],
> +            Data->RedfishServiceIpAddress [1],
> +            Data->RedfishServiceIpAddress [2],
> +            Data->RedfishServiceIpAddress [3],
> +            Data->RedfishServiceIpPort
> +            );
> +        }
> +       }
> +      Status = AddAndSignalNewRedfishService (
> +            Instance,
> +            NULL,
> +            RedfishServiceLocateStr,
> +            UuidStr,
> +            NULL,
> +            NULL,
> +            NULL,
> +            NULL,
> +            IsHttps
> +            );
> +    }
> +  }
> +  return Status;
> +}
> +
> +/**
> +  The function adds a new found Redfish service to internal list and
> +  notify client.
> +
> +  @param[in]  Instance
> EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE.
> +  @param[in]  RedfishVersion        Redfish version.
> +  @param[in]  RedfishLocation       Redfish location.
> +  @param[in]  Uuid                  Service UUID string.
> +  @param[in]  Os                    OS string.
> +  @param[in]  OsVer                 OS version string.
> +  @param[in]  Product               Product string.
> +  @param[in]  ProductVer            Product verison string.
> +  @param[in]  UseHttps              Redfish service requires secured
> connection.
> +  @retval EFI_SUCCESS               Redfish service is added to list
> successfully.
> +
> +**/
> +EFI_STATUS
> +AddAndSignalNewRedfishService (
> +  IN EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *Instance,
> +  IN UINTN *RedfishVersion OPTIONAL,
> +  IN CHAR8 *RedfishLocation OPTIONAL,
> +  IN CHAR8 *Uuid  OPTIONAL,
> +  IN CHAR8 *Os  OPTIONAL,
> +  IN CHAR8 *OsVer  OPTIONAL,
> +  IN CHAR8 *Product  OPTIONAL,
> +  IN CHAR8 *ProductVer  OPTIONAL,
> +  IN BOOLEAN UseHttps
> +  )
> +{
> +  BOOLEAN NewFound;
> +  BOOLEAN InfoRefresh;
> +  BOOLEAN RestExOpened;
> +  BOOLEAN DeleteRestEx;
> +  EFI_STATUS Status;
> +  EFI_REDFISH_DISCOVERED_INTERNAL_LIST *DiscoveredList;
> +  EFI_REDFISH_DISCOVERED_INSTANCE *DiscoveredInstance;
> +  CHAR16 *Char16Uuid;
> +  EFI_REST_EX_PROTOCOL *RestEx;
> +  EFI_REST_EX_HTTP_CONFIG_DATA *RestExHttpConfigData;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *NetworkInterface;
> +
> +  NewFound = TRUE;
> +  InfoRefresh = FALSE;
> +  Char16Uuid = NULL;
> +  RestExOpened = FALSE;
> +  DeleteRestEx = FALSE;
> +
> +  DEBUG ((DEBUG_INFO,"%a:Add this instance to Redfish instance list.\n",
> __FUNCTION__));
> +
> +  if (Uuid != NULL) {
> +    Char16Uuid = (CHAR16 *)AllocateZeroPool(AsciiStrSize((const CHAR8
> *)Uuid) * sizeof(CHAR16));
> +    AsciiStrToUnicodeStrS ((const CHAR8 *)Uuid, Char16Uuid,
> AsciiStrSize((const CHAR8 *)Uuid) * sizeof(CHAR16));
> +  }
> +  DiscoveredList = NULL;
> +  DiscoveredInstance = NULL;
> +  RestExHttpConfigData = NULL;
> +
> +  NetworkInterface = Instance->NetworkInterface;
> +  if (!IsListEmpty (&mRedfishInstanceList)) {
> +    //
> +    // Is this a duplicate redfish service.
> +    //
> +    DiscoveredList = (EFI_REDFISH_DISCOVERED_INTERNAL_LIST
> *)GetFirstNode (&mRedfishInstanceList);
> +    NewFound = FALSE;
> +    do {
> +      if (Char16Uuid == NULL ||
> DiscoveredList->Instance->Information.Uuid == NULL) {
> +        //
> +        // Check if this Redfish instance already found using IP
addrress.
> +        //
> +        if (!CheckIsIpVersion6(NetworkInterface)) {
> +          if (CompareMem ((VOID *)&Instance->TargetIpAddress.v4,
> +                      (VOID
> *)&DiscoveredList->Instance->Information.RedfishHostIpAddress.v4,
> +                      sizeof (EFI_IPv4_ADDRESS)
> +                      ) == 0)
> +          {
> +            DiscoveredInstance = DiscoveredList->Instance;
> +            if (DiscoveredList->Instance->Information.Uuid == NULL &&
> +                Char16Uuid != NULL) {
> +              InfoRefresh = TRUE;
> +              DiscoveredInstance = DiscoveredList->Instance;
> +              DEBUG((DEBUG_INFO,"*** This Redfish Service
> information refresh ***\n"));
> +            }
> +            break;
> +          }
> +        } else {
> +          if (CompareMem ((VOID *)&Instance->TargetIpAddress.v6,
> +                      (VOID
> *)&DiscoveredList->Instance->Information.RedfishHostIpAddress.v6,
> +                      sizeof (EFI_IPv6_ADDRESS)
> +                      ) == 0)
> +          {
> +            DiscoveredInstance = DiscoveredList->Instance;
> +            break;
> +          }
> +        }
> +      } else {
> +        //
> +        // Check if this Redfish instance already found using UUID.
> +        //
> +        if (StrCmp((const CHAR16 *)Char16Uuid, (const CHAR16
> *)DiscoveredList->Instance->Information.Uuid) == 0) {
> +          DiscoveredInstance = DiscoveredList->Instance;
> +          break;
> +        }
> +      }
> +      if (IsNodeAtEnd (&mRedfishInstanceList,
> &DiscoveredList->NextInstance)) {
> +        NewFound = TRUE;
> +        break;
> +      }
> +      DiscoveredList = (EFI_REDFISH_DISCOVERED_INTERNAL_LIST
> *)GetNextNode (&mRedfishInstanceList, &DiscoveredList->NextInstance);
> +    } while (TRUE);
> +  }
> +  if (NewFound || InfoRefresh) {
> +    if (!InfoRefresh) {
> +      DiscoveredList = (EFI_REDFISH_DISCOVERED_INTERNAL_LIST
> *)AllocateZeroPool(sizeof(EFI_REDFISH_DISCOVERED_INTERNAL_LIST));
> +      if (DiscoveredList == NULL) {
> +        return EFI_OUT_OF_RESOURCES;
> +      }
> +      InitializeListHead (&DiscoveredList->NextInstance);
> +      DiscoveredInstance = (EFI_REDFISH_DISCOVERED_INSTANCE
> *)AllocateZeroPool(sizeof(EFI_REDFISH_DISCOVERED_INSTANCE));
> +      if (DiscoveredInstance == NULL) {
> +        FreePool ((VOID *)DiscoveredList);
> +        return EFI_OUT_OF_RESOURCES;
> +      }
> +    }
> +    DEBUG ((DEBUG_INFO,"*** Redfish Service Information ***\n"));
> +
> +    DiscoveredInstance->Information.UseHttps = UseHttps;
> +    if (RedfishVersion != NULL) {
> +      DiscoveredInstance->Information.RedfishVersion = *RedfishVersion;
> +      DEBUG ((DEBUG_INFO,"Redfish service version: %d.\n",
> DiscoveredInstance->Information.RedfishVersion));
> +    }
> +    if (RedfishLocation != NULL) {
> +      DiscoveredInstance->Information.Location = (CHAR16
> *)AllocatePool(AsciiStrSize((const CHAR8 *)RedfishLocation) *
> sizeof(CHAR16));
> +      AsciiStrToUnicodeStrS ((const CHAR8 *)RedfishLocation,
> DiscoveredInstance->Information.Location, AsciiStrSize((const CHAR8
> *)RedfishLocation) * sizeof(CHAR16));
> +      DEBUG ((DEBUG_INFO,"Redfish service location: %s.\n",
> DiscoveredInstance->Information.Location));
> +    }
> +    if (Uuid != NULL) {
> +      DiscoveredInstance->Information.Uuid = (CHAR16
> *)AllocatePool(AsciiStrSize((const CHAR8 *)Uuid) * sizeof(CHAR16));
> +      AsciiStrToUnicodeStrS ((const CHAR8 *)Uuid,
> DiscoveredInstance->Information.Uuid, AsciiStrSize((const CHAR8 *)Uuid) *
> sizeof(CHAR16));
> +      DEBUG ((DEBUG_INFO,"Service UUID: %s.\n",
> DiscoveredInstance->Information.Uuid));
> +    }
> +    if (Os != NULL) {
> +      DiscoveredInstance->Information.Os = (CHAR16
> *)AllocatePool(AsciiStrSize((const CHAR8 *)Os) * sizeof(CHAR16));
> +      AsciiStrToUnicodeStrS ((const CHAR8 *)Os,
> DiscoveredInstance->Information.Os, AsciiStrSize((const CHAR8 *)Os) *
> sizeof(CHAR16));
> +      DEBUG ((DEBUG_INFO,"Redfish service OS: %s, Version:%s.\n",
> DiscoveredInstance->Information.Os,
> DiscoveredInstance->Information.OsVersion));
> +    }
> +    if (OsVer != NULL) {
> +      DiscoveredInstance->Information.OsVersion = (CHAR16
> *)AllocatePool(AsciiStrSize((const CHAR8 *)OsVer) * sizeof(CHAR16));
> +      AsciiStrToUnicodeStrS ((const CHAR8 *)OsVer,
> DiscoveredInstance->Information.OsVersion, AsciiStrSize((const CHAR8
> *)OsVer) * sizeof(CHAR16));
> +    }
> +    if (Product != NULL && ProductVer != NULL) {
> +      DiscoveredInstance->Information.Product = (CHAR16
> *)AllocatePool(AsciiStrSize((const CHAR8 *)Product) * sizeof(CHAR16));
> +      AsciiStrToUnicodeStrS ((const CHAR8 *)Product,
> DiscoveredInstance->Information.Product, AsciiStrSize((const CHAR8
> *)Product) * sizeof(CHAR16));
> +      DiscoveredInstance->Information.ProductVer = (CHAR16
> *)AllocatePool(AsciiStrSize((const CHAR8 *)ProductVer) * sizeof(CHAR16));
> +      AsciiStrToUnicodeStrS ((const CHAR8 *)ProductVer,
> DiscoveredInstance->Information.ProductVer, AsciiStrSize((const CHAR8
> *)ProductVer) * sizeof(CHAR16));
> +      DEBUG ((DEBUG_INFO,"Redfish service product: %s, Version:%s.\n",
> DiscoveredInstance->Information.Product,
> DiscoveredInstance->Information.ProductVer));
> +    }
> +
> +    if (RedfishLocation == NULL) {
> +      // This is the Redfish reported from SMBIOS 42h
> +      // without validation.
> +
> +      IP4_COPY_ADDRESS((VOID
> *)&DiscoveredInstance->Information.RedfishHostIpAddress.v4, (VOID
> *)&Instance->TargetIpAddress.v4);
> +    }
> +    if (!InfoRefresh) {
> +      DiscoveredList->Instance = DiscoveredInstance;
> +      InsertTailList(&mRedfishInstanceList,
> &DiscoveredList->NextInstance);
> +    }
> +    DiscoveredInstance->Status = EFI_SUCCESS;
> +  } else {
> +    if (DiscoveredList != NULL) {
> +      DEBUG((DEBUG_INFO,"*** This Redfish Service was already found
> ***\n"));
> +      if (DiscoveredInstance->Information.Uuid != NULL) {
> +        DEBUG((DEBUG_INFO,"Service UUID: %s.\n",
> DiscoveredInstance->Information.Uuid));
> +      } else {
> +        DEBUG((DEBUG_INFO,"Service UUID: unknown.\n"));
> +      }
> +    }
> +  }
> +  if (Char16Uuid != NULL) {
> +    FreePool((VOID *)Char16Uuid);
> +  }
> +
> +  Status = EFI_SUCCESS;
> +  if (NewFound || InfoRefresh) {
> +    //
> +    // Build up EFI_REDFISH_DISCOVERED_LIST in token.
> +    //
> +    Instance->DiscoverToken->DiscoverList.NumberOfServiceFound = 1;
> +    Instance->DiscoverToken->DiscoverList.RedfishInstances =
> DiscoveredInstance;
> +    DiscoveredInstance->Status = EFI_SUCCESS;
> +    if (!InfoRefresh) {
> +      Status = CreateRestExInstance (Instance, Instance->DiscoverToken);
> // Create REST EX child.
> +      if (EFI_ERROR (Status)) {
> +        DEBUG ((DEBUG_ERROR, "%a:Can't create REST EX child
> instance.\n",__FUNCTION__));
> +        goto ON_EXIT;
> +      }
> +      Status = gBS->OpenProtocol ( // Configure local host information.
> +
> Instance->DiscoverToken->DiscoverList.RedfishInstances->Information.Redfis
> hRestExHandle,
> +                  &gEfiRestExProtocolGuid,
> +                  (VOID **)&RestEx,
> +
> Instance->NetworkInterface->OpenDriverAgentHandle,
> +
> Instance->NetworkInterface->OpenDriverControllerHandle,
> +                  EFI_OPEN_PROTOCOL_BY_DRIVER
> +                  );
> +      if (EFI_ERROR (Status)) {
> +        DeleteRestEx = TRUE;
> +        goto ERROR_EXIT;
> +      }
> +      RestExOpened = TRUE;
> +      RestExHttpConfigData = AllocateZeroPool (sizeof
> (EFI_REST_EX_HTTP_CONFIG_DATA));
> +      if (RestExHttpConfigData == NULL) {
> +        Status = EFI_OUT_OF_RESOURCES;
> +        DeleteRestEx = TRUE;
> +        goto EXIT_FREE_CONFIG_DATA;
> +      }
> +      RestExHttpConfigData->SendReceiveTimeout = 5000;
> +      RestExHttpConfigData->HttpConfigData.HttpVersion =
> HttpVersion11;
> +      RestExHttpConfigData->HttpConfigData.LocalAddressIsIPv6 =
> CheckIsIpVersion6(NetworkInterface);
> +      if (RestExHttpConfigData->HttpConfigData.LocalAddressIsIPv6) {
> +        RestExHttpConfigData->HttpConfigData.AccessPoint.IPv6Node =
> AllocateZeroPool (sizeof (EFI_HTTPv6_ACCESS_POINT));
> +        if (RestExHttpConfigData->HttpConfigData.AccessPoint.IPv6Node
> == NULL) {
> +          Status = EFI_OUT_OF_RESOURCES;
> +          goto EXIT_FREE_CONFIG_DATA;
> +        }
> +      } else {
> +        RestExHttpConfigData->HttpConfigData.AccessPoint.IPv4Node =
> AllocateZeroPool (sizeof (EFI_HTTPv4_ACCESS_POINT));
> +        if (RestExHttpConfigData->HttpConfigData.AccessPoint.IPv4Node
> == NULL) {
> +          Status = EFI_OUT_OF_RESOURCES;
> +          goto EXIT_FREE_CONFIG_DATA;
> +        }
> +
> RestExHttpConfigData->HttpConfigData.AccessPoint.IPv4Node->UseDefaultA
> ddress = TRUE;
> +      }
> +      Status = RestEx->Configure (
> +                       RestEx,
> +                       (EFI_REST_EX_CONFIG_DATA)(UINT8
> *)RestExHttpConfigData
> +                       );
> +      if (EFI_ERROR (Status)) {
> +        DEBUG ((DEBUG_ERROR,"%a:REST EX configured..\n",
> __FUNCTION__));
> +        DeleteRestEx = TRUE;
> +        goto EXIT_FREE_ALL;
> +      }
> +      //
> +      // Signal client, close REST EX before signaling client.
> +      //
> +      if (RestExOpened) {
> +        gBS->CloseProtocol(
> +
> Instance->DiscoverToken->DiscoverList.RedfishInstances->Information.Redfis
> hRestExHandle,
> +             &gEfiRestExProtocolGuid,
> +             Instance->NetworkInterface->OpenDriverAgentHandle,
> +             Instance->NetworkInterface->OpenDriverControllerHandle
> +          );
> +        RestExOpened = FALSE;
> +      }
> +    }
> +    Status = gBS->SignalEvent(Instance->DiscoverToken->Event);
> +    if (!EFI_ERROR (Status)) {
> +      DEBUG ((DEBUG_ERROR,"%a:No event to signal!\n",
> __FUNCTION__));
> +    }
> +  }
> +
> +EXIT_FREE_ALL:;
> +  if (RestExHttpConfigData != NULL &&
> RestExHttpConfigData->HttpConfigData.AccessPoint.IPv4Node != NULL) {
> +    FreePool
> (RestExHttpConfigData->HttpConfigData.AccessPoint.IPv4Node);
> +  }
> +
> +EXIT_FREE_CONFIG_DATA:;
> +  if (RestExHttpConfigData != NULL) {
> +    FreePool((VOID *)RestExHttpConfigData);
> +  }
> +  if (RestExOpened) {
> +    gBS->CloseProtocol(
> +
> Instance->DiscoverToken->DiscoverList.RedfishInstances->Information.Redfis
> hRestExHandle,
> +           &gEfiRestExProtocolGuid,
> +           Instance->NetworkInterface->OpenDriverAgentHandle,
> +           Instance->NetworkInterface->OpenDriverControllerHandle
> +        );
> +  }
> +ERROR_EXIT:;
> +    if (DeleteRestEx && RestExOpened) {
> +      gBS->CloseProtocol(
> +
> Instance->DiscoverToken->DiscoverList.RedfishInstances->Information.Redfis
> hRestExHandle,
> +           &gEfiRestExProtocolGuid,
> +           Instance->NetworkInterface->OpenDriverAgentHandle,
> +           Instance->NetworkInterface->OpenDriverControllerHandle
> +        );
> +    }
> +ON_EXIT:;
> +  return Status;
> +}
> +
> +/**
> +  This function gets the subnet information of this network interface
> instance.
> +  can discover Redfish service on it.
> +
> +  @param[in]    Instance
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL instance.
> +  @param[in]    ImageHandle  EFI Image handle request the network
> interface list.
> +
> +  @retval EFI_SUCCESS
> +
> +**/
> +EFI_STATUS
> +NetworkInterfaceGetSubnetInfo (
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *Instance,
> +  IN EFI_HANDLE ImageHandle
> +  )
> +{
> +  EFI_STATUS Status;
> +  UINT32 ProtocolType;
> +  UINT32 IPv6InfoIndex;
> +  EFI_IP6_ADDRESS_INFO *ThisSubnetAddrInfoIPv6;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *NewNetworkInterface;
> +
> +  if (Instance->GotSubnetInfo) {
> +    return EFI_SUCCESS;
> +  }
> +
> +  ProtocolType = Instance->NetworkProtocolType;
> +  if (gRequiredProtocol [ProtocolType].GetSubnetInfo != NULL &&
> Instance->GotSubnetInfo == FALSE) {
> +    Status = gRequiredProtocol [ProtocolType].GetSubnetInfo (
> +        ImageHandle,
> +        Instance
> +        );
> +    if (EFI_ERROR (Status)) {
> +      DEBUG ((DEBUG_ERROR,"%a:Faile to get Subnet infomation.\n",
> __FUNCTION__));
> +      return Status;
> +    } else {
> +      DEBUG ((DEBUG_INFO,"%a:MAC address: %s\n", __FUNCTION__,
> Instance->StrMacAddr));
> +      if (CheckIsIpVersion6 (Instance)) {
> +        if (Instance->SubnetAddrInfoIPv6Number == 0) {
> +          DEBUG ((DEBUG_ERROR,"%a: There is no Subnet infomation for
> IPv6 network interface.\n", __FUNCTION__));
> +          return EFI_NOT_FOUND;
> +        }
> +        ThisSubnetAddrInfoIPv6 = Instance->SubnetAddrInfoIPv6; // First
> IPv6 address information.
> +        IP6_COPY_ADDRESS (&Instance->SubnetAddr.v6,
> &ThisSubnetAddrInfoIPv6->Address);
> +        Instance->SubnetPrefixLength =
> ThisSubnetAddrInfoIPv6->PrefixLength;
> +        DEBUG((DEBUG_INFO,"   IPv6 Subnet ID:%d, Prefix
> length: %d.\n",
> +               ThisSubnetAddrInfoIPv6->Address.Addr [7] +
> (UINT16)ThisSubnetAddrInfoIPv6->Address.Addr [6] * 256,
> +               ThisSubnetAddrInfoIPv6->PrefixLength)
> +               );
> +        //
> +        // If this is IPv6, then we may have to propagate network
interface
> for IPv6 network scopes
> +        // according to the Ipv6 address information.
> +        //
> +        ThisSubnetAddrInfoIPv6 ++;
> +        for (IPv6InfoIndex = 0; IPv6InfoIndex <
> Instance->SubnetAddrInfoIPv6Number - 1; IPv6InfoIndex++) {
> +          //
> +          // Build up addtional
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL instances.
> +          //
> +          NewNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)AllocateZeroPool (sizeof
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL));
> +          if (NewNetworkInterface != NULL) {
> +            CopyMem ((VOID *)NewNetworkInterface, (VOID *)Instance,
> sizeof (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL)); //
> Clone information of first instance.
> +            IP6_COPY_ADDRESS
> (&NewNetworkInterface->SubnetAddr.v6,
> &ThisSubnetAddrInfoIPv6->Address);
> +            NewNetworkInterface->SubnetPrefixLength =
> ThisSubnetAddrInfoIPv6->PrefixLength;
> +            NewNetworkInterface->GotSubnetInfo = TRUE;
> +            InsertTailList (&mEfiRedfishDiscoverNetworkInterface,
> &NewNetworkInterface->Entry);
> +            ThisSubnetAddrInfoIPv6 ++;
> +            mNumNetworkInterface ++;
> +            DEBUG((DEBUG_INFO,"   IPv6 Subnet ID:%d, Prefix
> length: %d.\n",
> +                   ThisSubnetAddrInfoIPv6->Address.Addr [7] +
> (UINT16)ThisSubnetAddrInfoIPv6->Address.Addr [6] * 256,
> +                   ThisSubnetAddrInfoIPv6->PrefixLength)
> +                  );
> +          } else {
> +            return EFI_OUT_OF_RESOURCES;
> +          }
> +        }
> +      } else {
> +        DEBUG ((DEBUG_INFO,"   IPv4 Subnet:%d.%d.%d.%d Subnet
> mask: %d.%d.%d.%d.\n",
> +                    Instance->SubnetAddr.v4.Addr [0],
> +                    Instance->SubnetAddr.v4.Addr [1],
> +                    Instance->SubnetAddr.v4.Addr [2],
> +                    Instance->SubnetAddr.v4.Addr [3],
> +                    Instance->SubnetMask.v4.Addr [0],
> +                    Instance->SubnetMask.v4.Addr [1],
> +                    Instance->SubnetMask.v4.Addr [2],
> +                    Instance->SubnetMask.v4.Addr [3]
> +                    ));
> +      }
> +    }
> +  }
> +  Instance->GotSubnetInfo = TRUE; // Only try to get Subnet Info once.
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This function gets the network interface list which Redfish discover
> protocol
> +  can discover Redfish service on it.
> +
> +  @param[in]    This
> EFI_REDFISH_DISCOVER_PROTOCOL instance.
> +  @param[in]    ImageHandle           EFI Image handle request the
> network interface list,
> +  @param[out]   NumberOfNetworkIntfs  Number of network interfaces
> can do Redfish service discovery.
> +  @param[out]   NetworkIntfInstances  Network interface instances.
> It's an array of instance. The number of entries
> +                                      in array is indicated by
> NumberOfNetworkIntfs.
> +                                      Caller has to release the
> memory
> +                                      allocated by Redfish discover
> protocol.
> +
> +  @retval EFI_SUCCESS        The information of network interface is
> returned in NumberOfNetworkIntfs and
> +                             NetworkIntfInstances.
> +  @retval Others             Fail to return the information of network
> interface.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishServiceGetNetworkInterface (
> +  IN EFI_REDFISH_DISCOVER_PROTOCOL   *This,
> +  IN EFI_HANDLE                      ImageHandle,
> +  OUT UINTN                          *NumberOfNetworkIntfs,
> +  OUT EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> **NetworkIntfInstances
> +)
> +{
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterfaceIntn;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE *ThisNetworkInterface;
> +
> +  if (NetworkIntfInstances == NULL || NumberOfNetworkIntfs == NULL ||
> ImageHandle == NULL) {
> +    return EFI_INVALID_PARAMETER;
> +  }
> +
> +  *NumberOfNetworkIntfs = 0;
> +  *NetworkIntfInstances = NULL;
> +
> +  if (IsListEmpty ((const
> LIST_ENTRY*)&mEfiRedfishDiscoverNetworkInterface)) {
> +    return EFI_NOT_FOUND;
> +  }
> +
> +  ThisNetworkInterface = (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> *)AllocateZeroPool (sizeof (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE)
> * mNumNetworkInterface);
> +  if (ThisNetworkInterface == NULL) {
> +    return EFI_OUT_OF_RESOURCES;
> +  }
> +  *NetworkIntfInstances = ThisNetworkInterface;
> +  ThisNetworkInterfaceIntn =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
> +  while (TRUE) {
> +    ThisNetworkInterface->IsIpv6 = FALSE;
> +    if (CheckIsIpVersion6 (ThisNetworkInterfaceIntn)) {
> +      ThisNetworkInterface->IsIpv6 = TRUE;
> +    }
> +    CopyMem((VOID *)&ThisNetworkInterface->MacAddress,
> &ThisNetworkInterfaceIntn->MacAddress,
> ThisNetworkInterfaceIntn->HwAddressSize);
> +    NetworkInterfaceGetSubnetInfo(ThisNetworkInterfaceIntn,
> ImageHandle); // Get subnet info.
> +    if (!ThisNetworkInterface->IsIpv6) {
> +      IP4_COPY_ADDRESS(&ThisNetworkInterface->SubnetId.v4,
> &ThisNetworkInterfaceIntn->SubnetAddr.v4); // IPv4 subnet information.
> +    } else {
> +      IP6_COPY_ADDRESS (&ThisNetworkInterface->SubnetId.v6,
> &ThisNetworkInterfaceIntn->SubnetAddr.v6); // IPv6 subnet information in
> IPv6 address information.
> +    }
> +    ThisNetworkInterface->SubnetPrefixLength =
> ThisNetworkInterfaceIntn->SubnetPrefixLength;
> +    ThisNetworkInterface->VlanId = ThisNetworkInterfaceIntn->VlanId;
> +    (*NumberOfNetworkIntfs) ++;
> +    if (IsNodeAtEnd (&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterfaceIntn->Entry)) {
> +      break;
> +    }
> +    ThisNetworkInterfaceIntn =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)GetNextNode(&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterfaceIntn->Entry);
> +    ThisNetworkInterface ++;
> +  };
> +  return EFI_SUCCESS;
> +}
> +/**
> +  This function acquires Redfish services by discovering static Redfish
setting
> +  according to Redfish Host Interface or through SSDP. Returns a list of
EFI
> +  handles in EFI_REDFISH_DISCOVERED_LIST. Each of EFI handle has
> cooresponding
> +  EFI REST EX instance installed on it. Each REST EX isntance is a child
> instance which
> +  created through EFI REST EX serivce protoocl for communicating with
> specific
> +  Redfish service.
> +
> +  @param[in]    This
> EFI_REDFISH_DISCOVER_PROTOCOL instance.
> +  @param[in]    ImageHandle             EFI image owns these
> Redfish service instances.
> +  @param[in]    TargetNetworkInterface  Target network interface to
> do the discovery.
> +                                        NULL means discover
> Redfish service on all network interfaces on platform.
> +  @param[in]    Flags                   Redfish service discover
> flags.
> +  @param[in]    Token
> EFI_REDFISH_DISCOVERED_TOKEN instance.
> +                                        The memory of
> EFI_REDFISH_DISCOVERED_LIST and the strings in
> +
> EFI_REDFISH_DISCOVERED_INFORMATION are all allocated by Acquire()
> +                                        and must be freed when
> caller invoke Release().
> +
> +  @retval EFI_SUCCESS             REST EX instance of discovered
> Redfish services are returned.
> +  @retval EFI_INVALID_PARAMETERS  ImageHandle == NULL, Flags == 0,
> Token == NULL, Token->Timeout > 5,
> +                                  or Token->Event == NULL.
> +  @retval Others                  Fail acquire Redfish services.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishServiceAcquireService (
> +  IN EFI_REDFISH_DISCOVER_PROTOCOL          *This,
> +  IN EFI_HANDLE                             ImageHandle,
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> *TargetNetworkInterface,
> +  IN EFI_REDFISH_DISCOVER_FLAG              Flags,
> +  IN EFI_REDFISH_DISCOVERED_TOKEN           *Token
> +  )
> +{
> +  EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE *Instance;
> +  EFI_STATUS Status1;
> +  EFI_STATUS Status2;
> +  BOOLEAN NewInstance;
> +  UINTN NumNetworkInterfaces;
> +  UINTN NetworkInterfacesIndex;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *TargetNetworkInterfaceInternal;
> +
> +  DEBUG ((DEBUG_INFO,"%a:Entry.\n", __FUNCTION__));
> +
> +  //
> +  // Validate parameters.
> +  //
> +  if (ImageHandle == NULL || Token == NULL || ((Flags &
> ~EFI_REDFISH_DISCOVER_VALIDATION) == 0)) {
> +    DEBUG ((DEBUG_ERROR,"%a:Invalid parameters.\n",
> __FUNCTION__));
> +    return EFI_INVALID_PARAMETER;
> +  }
> +  //
> +  // Validate target network interface.
> +  //
> +  if (EFI_ERROR (ValidateTargetNetworkInterface (TargetNetworkInterface,
> Flags))) {
> +      return EFI_UNSUPPORTED;
> +  }
> +  if (TargetNetworkInterface != NULL) {
> +    TargetNetworkInterfaceInternal = GetTargetNetworkInterfaceInternal
> (TargetNetworkInterface);
> +    NumNetworkInterfaces = 1;
> +  } else {
> +    TargetNetworkInterfaceInternal =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
> +    NumNetworkInterfaces = NumberOfNetworkInterface ();
> +    if (NumNetworkInterfaces == 0) {
> +      DEBUG ((DEBUG_ERROR,"%a:No network interface on platform.\n",
> __FUNCTION__));
> +      return EFI_UNSUPPORTED;
> +    }
> +  }
> +  for (NetworkInterfacesIndex = 0; NetworkInterfacesIndex <
> NumNetworkInterfaces; NetworkInterfacesIndex ++) {
> +    Status1 = EFI_SUCCESS;
> +    Status2 = EFI_SUCCESS;
> +    NewInstance = FALSE;
> +    Instance = GetInstanceByOwner (ImageHandle,
> TargetNetworkInterfaceInternal, Flags &
> ~EFI_REDFISH_DISCOVER_VALIDATION); // Check if we can re-use previous
> instance.
> +    if (Instance == NULL) {
> +      DEBUG ((DEBUG_INFO,"%a:Create new
> EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE.\n", __FUNCTION__));
> +      Instance = (EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE
> *)AllocateZeroPool(sizeof(EFI_REDFISH_DISCOVERED_INTERNAL_INSTANCE))
> ;
> +      if (Instance == NULL) {
> +        DEBUG ((DEBUG_ERROR,"%a:Memory allocation fail.\n",
> __FUNCTION__));
> +      }
> +      InitializeListHead (&Instance->Entry);
> +      Instance->Owner = ImageHandle;
> +      Instance->DiscoverFlags = Flags &
> ~EFI_REDFISH_DISCOVER_VALIDATION;
> +      Instance->NetworkInterface = TargetNetworkInterfaceInternal;
> +      //
> +      // Get subnet information in case subnet information is not set
> because
> +      // RedfishServiceGetNetworkInterfaces hasn't been called yet.
> +      //
> +      NetworkInterfaceGetSubnetInfo (TargetNetworkInterfaceInternal,
> ImageHandle);
> +      NewInstance = TRUE;
> +    }
> +    if (TargetNetworkInterfaceInternal->StrMacAddr != NULL) {
> +      DEBUG((DEBUG_INFO,"%a:Acquire Redfish service on network
> interface MAC address:%s.\n", __FUNCTION__,
> TargetNetworkInterfaceInternal->StrMacAddr));
> +    } else {
> +      DEBUG((DEBUG_INFO,"%a:WARNING: No MAC address on this
> network interface.\n", __FUNCTION__));
> +    }
> +
> +    Instance->DiscoverToken = Token; // Always use the latest Token
> passed by caller.
> +    if ((Flags & EFI_REDFISH_DISCOVER_HOST_INTERFACE) != 0) {
> +      DEBUG ((DEBUG_INFO,"%a:Redfish HOST interface discovery.\n",
> __FUNCTION__));
> +      Instance->HostIntfValidation = FALSE;
> +      if ((Flags & EFI_REDFISH_DISCOVER_VALIDATION) != 0) {
> +        Instance->HostIntfValidation = TRUE;
> +      }
> +      Status1 = DiscoverRedfishHostInterface (Instance); // Discover
> Redfish service through Redfish Host Interface.
> +    }
> +    if ((Flags & EFI_REDFISH_DISCOVER_SSDP) != 0) {
> +      DEBUG ((DEBUG_ERROR,"%a:Redfish service discovery through SSDP
> is not supported\n", __FUNCTION__));
> +      return EFI_UNSUPPORTED;
> +    } else {
> +      if (EFI_ERROR (Status1) && EFI_ERROR (Status2)) {
> +        FreePool ((VOID *)Instance);
> +        DEBUG ((DEBUG_ERROR,"%a:Something wrong on Redfish service
> discovery Status1=%x, Status2=%x.\n", __FUNCTION__, Status1, Status2));
> +      } else {
> +        if (NewInstance) {
> +          InsertTailList(&mRedfishDiscoverList, &Instance->Entry);
> +        }
> +      }
> +    }
> +    if (TargetNetworkInterface == NULL) {
> +      //
> +      // Discover Redfish services on all of network interfaces.
> +      //
> +      TargetNetworkInterfaceInternal =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)GetNextNode(&mEfiRedfishDiscoverNetworkInterface,
> &TargetNetworkInterfaceInternal->Entry);
> +    }
> +  }
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This function aborts Redfish service discovery on the given network
> interface.
> +
> +  @param[in]    This
> EFI_REDFISH_DISCOVER_PROTOCOL instance.
> +  @param[in]    TargetNetworkInterface  Target network interface to
> do the discovery.
> +
> +  @retval EFI_SUCCESS             REST EX instance of discovered
> Redfish services are returned.
> +  @retval Others                  Fail to abort Redfish service
> discovery.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishServiceAbortAcquire (
> +  IN EFI_REDFISH_DISCOVER_PROTOCOL      *This,
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> *TargetNetworkInterface OPTIONAL
> +)
> +{
> +  // This function is used to abort Redfish service discovery through
SSDP
> +  // on the network interface. SSDP is optionally supprted by
> EFI_REDFISH_DISCOVER_PROTOCOL,
> +  // we dont have implementation for SSDP now.
> +
> +  return EFI_UNSUPPORTED;
> +}
> +
> +/**
> +  This function releases Redfish services found by
RedfishServiceAcquire().
> +
> +  @param[in]    This         EFI_REDFISH_DISCOVER_PROTOCOL
> instance.
> +  @param[in]    InstanceList The Redfish service to release.
> +
> +  @retval EFI_SUCCESS        REST EX instances of discovered Redfish
> are released.
> +  @retval Others             Fail to remove the entry
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishServiceReleaseService (
> +  IN EFI_REDFISH_DISCOVER_PROTOCOL   *This,
> +  IN EFI_REDFISH_DISCOVERED_LIST *InstanceList
> +  )
> +{
> +  UINTN NumService;
> +  BOOLEAN AnyFailRelease;
> +  EFI_REDFISH_DISCOVERED_INSTANCE *ThisRedfishInstance;
> +  EFI_REDFISH_DISCOVERED_INTERNAL_LIST *DiscoveredRedfishInstance;
> +
> +  if (IsListEmpty (&mRedfishInstanceList)) {
> +    DEBUG ((DEBUG_ERROR,"%a:No any discovered Redfish service.\n",
> __FUNCTION__));
> +    return EFI_NOT_FOUND;
> +  }
> +  AnyFailRelease = FALSE;
> +  ThisRedfishInstance = InstanceList->RedfishInstances;
> +  for (NumService = 0; NumService < InstanceList->NumberOfServiceFound;
> NumService ++) {
> +    DiscoveredRedfishInstance =
> (EFI_REDFISH_DISCOVERED_INTERNAL_LIST
> *)GetFirstNode(&mRedfishInstanceList);
> +    do {
> +      if (DiscoveredRedfishInstance->Instance == ThisRedfishInstance) {
> +        RemoveEntryList (&DiscoveredRedfishInstance->NextInstance);
> +        if (ThisRedfishInstance->Information.Location != NULL) {
> +          FreePool (ThisRedfishInstance->Information.Location);
> +        }
> +        if (ThisRedfishInstance->Information.Uuid != NULL) {
> +          FreePool (ThisRedfishInstance->Information.Uuid);
> +        }
> +        if (ThisRedfishInstance->Information.Os != NULL) {
> +          FreePool (ThisRedfishInstance->Information.Os);
> +        }
> +        if (ThisRedfishInstance->Information.OsVersion != NULL) {
> +          FreePool (ThisRedfishInstance->Information.OsVersion);
> +        }
> +        if (ThisRedfishInstance->Information.Product != NULL) {
> +          FreePool (ThisRedfishInstance->Information.Product);
> +        }
> +        if (ThisRedfishInstance->Information.ProductVer != NULL) {
> +          FreePool (ThisRedfishInstance->Information.ProductVer);
> +        }
> +        FreePool((VOID *)ThisRedfishInstance);
> +        goto ReleaseNext;
> +      }
> +
> +      if (IsNodeAtEnd(&mRedfishInstanceList,
> &DiscoveredRedfishInstance->NextInstance)) {
> +        break;
> +      }
> +      DiscoveredRedfishInstance =
> (EFI_REDFISH_DISCOVERED_INTERNAL_LIST
> *)GetNextNode(&mRedfishInstanceList,
> &DiscoveredRedfishInstance->NextInstance);
> +    } while (TRUE);
> +    AnyFailRelease = TRUE;
> +ReleaseNext:;
> +    //
> +    // Release next discovered Redfish Service.
> +    //
> +    ThisRedfishInstance = (EFI_REDFISH_DISCOVERED_INSTANCE
> *)((UINT8 *)ThisRedfishInstance + sizeof
> (EFI_REDFISH_DISCOVERED_INSTANCE));
> +  }
> +  if (AnyFailRelease) {
> +    return EFI_NOT_FOUND;
> +  } else {
> +    return EFI_SUCCESS;
> +  }
> +}
> +
> +EFI_REDFISH_DISCOVER_PROTOCOL mRedfishDiscover = {
> +  RedfishServiceGetNetworkInterface,
> +  RedfishServiceAcquireService,
> +  RedfishServiceAbortAcquire,
> +  RedfishServiceReleaseService
> +};
> +
> +/**
> +  This function create an
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL for the
> +  given network interface.
> +
> +
> +  @param[in]  ControllerHandle    MAC address of this network
> interface.
> +  @param[in]  NetworkProtocolType Network protocol type.
> +  @param[out] IsNewInstance       BOOLEAN means new instance or
> not.
> +  @param[out] NetworkInterface    Pointer to to
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL.
> +
> +  @retval EFI_STATUS
> +**/
> +EFI_STATUS
> +CreateRedfishDiscoverNetworkInterface (
> +  IN EFI_HANDLE ControllerHandle,
> +  IN UINT32 NetworkProtocolType,
> +  OUT BOOLEAN  *IsNewInstance,
> +  OUT EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> **NetworkInterface
> +  )
> +{
> +  EFI_MAC_ADDRESS MacAddress;
> +  UINTN HwAddressSize;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *NewNetworkInterface;
> +
> +  NetLibGetMacAddress (ControllerHandle, &MacAddress,
> &HwAddressSize);
> +  NewNetworkInterface = NULL;
> +  *IsNewInstance = TRUE;
> +  if (!IsListEmpty ((const
> LIST_ENTRY*)&mEfiRedfishDiscoverNetworkInterface)) {
> +    //
> +    // Check if this instance already exist.
> +    //
> +    ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
> +    if (ThisNetworkInterface != NULL) {
> +      while (TRUE) {
> +        if ((CompareMem ((CONST VOID
> *)&ThisNetworkInterface->MacAddress.Addr, (CONST VOID
> *)&MacAddress.Addr, HwAddressSize) == 0) &&
> +             (ThisNetworkInterface->NetworkProtocolType ==
> NetworkProtocolType)){
> +          NewNetworkInterface = ThisNetworkInterface;
> +          *IsNewInstance = FALSE;
> +          break;
> +        }
> +        if (IsNodeAtEnd (&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry)) {
> +          NewNetworkInterface = NULL;
> +          break;
> +        }
> +        ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)GetNextNode(&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry);
> +      };
> +    }
> +  }
> +  if (NewNetworkInterface == NULL) {
> +    //
> +    // Create a new instance.
> +    //
> +    NewNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)AllocateZeroPool (sizeof
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL));
> +    if (NewNetworkInterface == NULL) {
> +      return EFI_OUT_OF_RESOURCES;
> +    }
> +    NewNetworkInterface->HwAddressSize = HwAddressSize;
> +    CopyMem (&NewNetworkInterface->MacAddress.Addr,
> &MacAddress.Addr, NewNetworkInterface->HwAddressSize);
> +    NetLibGetMacString (ControllerHandle, NULL,
> &NewNetworkInterface->StrMacAddr);
> +    NewNetworkInterface->VlanId = NetLibGetVlanId (ControllerHandle);
> +  }
> +  *NetworkInterface = NewNetworkInterface;
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This function destory network interface
> +
> +
> +  @param[in]  ThisNetworkInterface
> EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL instance.
> +
> +  @retval EFI_STATUS
> +**/
> +EFI_STATUS
> +DestroyRedfishNetwrokInterface (
> +  IN EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface
> +  )
> +{
> +  EFI_STATUS Status;
> +
> +  Status = gBS->UninstallProtocolInterface(
> +                  ThisNetworkInterface->OpenDriverControllerHandle,
> +                  gRequiredProtocol
> [ThisNetworkInterface->NetworkProtocolType].DiscoveredProtocolGuid,
> +
> &ThisNetworkInterface->NetworkInterfaceProtocolInfo.ProtocolDiscoverId
> +                  );
> +  RemoveEntryList (&ThisNetworkInterface->Entry);
> +  mNumNetworkInterface --;
> +  FreePool (ThisNetworkInterface);
> +  return Status;
> +}
> +
> +/**
> +  Tests to see if the required protocols are provided on the given
> +  controller handle.
> +
> +  @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.
> +  @retval EFI_SUCCESS              One of required protocol is found.
> +  @retval EFI_UNSUPPORTED          None of required protocol is
> found.
> +**/
> +EFI_STATUS
> +TestForRequiredProtocols (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE ControllerHandle
> +  )
> +{
> +  UINT32 Id;
> +  UINTN Index;
> +  EFI_STATUS Status;
> +
> +  for (Index = 0; Index < (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL)); Index ++) {
> +    Status = gBS->OpenProtocol (
> +                  ControllerHandle,
> +                  gRequiredProtocol
> [Index].RequiredServiceBindingProtocolGuid,
> +                  NULL,
> +                  This->DriverBindingHandle,
> +                  ControllerHandle,
> +                  EFI_OPEN_PROTOCOL_TEST_PROTOCOL
> +                  );
> +    if (!EFI_ERROR (Status)) {
> +      Status = gBS->OpenProtocol (
> +                      ControllerHandle,
> +                      gRequiredProtocol
> [Index].DiscoveredProtocolGuid,
> +                      (VOID **) &Id,
> +                      This->DriverBindingHandle,
> +                      ControllerHandle,
> +                      EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                      );
> +      if (EFI_ERROR (Status)) {
> +        DEBUG((DEBUG_ERROR, "%a: %s is found on this controller
> handle.\n", __FUNCTION__, gRequiredProtocol [Index].ProtocolName));
> +        return EFI_SUCCESS;
> +      }
> +    }
> +  }
> +  return EFI_UNSUPPORTED;
> +}
> +
> +/**
> +  Build up network interface and create corresponding service through the
> given
> +  controller handle.
> +
> +  @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.
> +  @retval EFI_SUCCESS              One of required protocol is found.
> +  @retval EFI_UNSUPPORTED          None of required protocol is
> found.
> +  @retval EFI_UNSUPPORTED          Failed to build up network
> interface.
> +**/
> +EFI_STATUS
> +BuildupNetworkInterface (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE ControllerHandle
> +  )
> +{
> +  UINT32 Id;
> +  UINT32 Index;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *NetworkInterface;
> +  BOOLEAN IsNew;
> +  EFI_STATUS Status;
> +  VOID *TempInterface;
> +  VOID **Interface;
> +  UINT32 *ProtocolDiscoverIdPtr;
> +  EFI_HANDLE OpenDriverAgentHandle;
> +  EFI_HANDLE OpenDriverControllerHandle;
> +  EFI_HANDLE *HandleOfProtocolInterfacePtr;
> +  EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL
> *RestExInstance;
> +  EFI_TPL OldTpl;
> +  BOOLEAN NewNetworkInterfaceInstalled;
> +
> +  NewNetworkInterfaceInstalled = FALSE;
> +  Index = 0;
> +  do {
> +    Status = gBS->OpenProtocol ( // Already in list?
> +                    ControllerHandle,
> +                    gRequiredProtocol [Index].DiscoveredProtocolGuid,
> +                    (VOID **) &Id,
> +                    This->DriverBindingHandle,
> +                    ControllerHandle,
> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                    );
> +    if (!EFI_ERROR (Status)) {
> +      Index ++;
> +      if (Index == (sizeof(gRequiredProtocol) /
> sizeof(REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> +        break;
> +      }
> +      continue;
> +    }
> +
> +    Status = gBS->OpenProtocol (
> +                    ControllerHandle,
> +                    gRequiredProtocol
> [Index].RequiredServiceBindingProtocolGuid,
> +                    &TempInterface,
> +                    This->DriverBindingHandle,
> +                    ControllerHandle,
> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                    );
> +    if (EFI_ERROR (Status)) {
> +      Index ++;
> +      if (Index == (sizeof(gRequiredProtocol) /
> sizeof(REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> +        break;
> +      }
> +      continue;
> +    }
> +    if (gRequiredProtocol [Index].ProtocolType != ProtocolTypeRestEx) {
> +      OldTpl = gBS->RaiseTPL
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_TPL);
> +      Status = CreateRedfishDiscoverNetworkInterface(ControllerHandle,
> gRequiredProtocol [Index].ProtocolType, &IsNew, &NetworkInterface);
> +      if (EFI_ERROR (Status)) {
> +        gBS->RestoreTPL (OldTpl);
> +        return Status;
> +      }
> +      NetworkInterface->NetworkProtocolType = gRequiredProtocol
> [Index].ProtocolType;
> +      NetworkInterface->OpenDriverAgentHandle =
> This->DriverBindingHandle;
> +      NetworkInterface->OpenDriverControllerHandle = ControllerHandle;
> +      NetworkInterface->NetworkInterfaceProtocolInfo.ProtocolGuid = \
> +        *gRequiredProtocol [Index].RequiredProtocolGuid;
> +
> NetworkInterface->NetworkInterfaceProtocolInfo.ProtocolServiceGuid = \
> +        *gRequiredProtocol [Index].RequiredServiceBindingProtocolGuid;
> +      ProtocolDiscoverIdPtr =
> &NetworkInterface->NetworkInterfaceProtocolInfo.ProtocolDiscoverId;
> +      OpenDriverAgentHandle =
> NetworkInterface->OpenDriverAgentHandle;
> +      OpenDriverControllerHandle =
> NetworkInterface->OpenDriverControllerHandle;
> +      HandleOfProtocolInterfacePtr =
> &NetworkInterface->NetworkInterfaceProtocolInfo.ProtocolControllerHandle
> ;
> +      Interface =
> &NetworkInterface->NetworkInterfaceProtocolInfo.NetworkProtocolInterfac
> e;
> +      NewNetworkInterfaceInstalled = TRUE;
> +      if (IsNew) {
> +        InsertTailList (&mEfiRedfishDiscoverNetworkInterface,
> &NetworkInterface->Entry);
> +        mNumNetworkInterface ++;
> +      }
> +      gBS->RestoreTPL (OldTpl);
> +    } else {
> +      // Record REST_EX instance. REST_EX is created when clinet asks for
> Redfish service discovery.
> +      // Redfish Service Discover protocol will match REST EX to the
> corresponding EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> +      // when discovery.
> +
> +      RestExInstance =
> (EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL *)AllocateZeroPool
> (sizeof (EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL));
> +      if (RestExInstance == NULL) {
> +        return EFI_OUT_OF_RESOURCES;
> +      }
> +      RestExInstance->OpenDriverAgentHandle =
> This->DriverBindingHandle;
> +      RestExInstance->OpenDriverControllerHandle = ControllerHandle;
> +      RestExInstance->RestExControllerHandle = ControllerHandle;
> +      InitializeListHead (&RestExInstance->Entry);
> +      InsertTailList (&mEfiRedfishDiscoverRestExInstance,
> &RestExInstance->Entry);
> +      mNumRestExInstance ++;
> +      ProtocolDiscoverIdPtr = &RestExInstance->RestExId;
> +      OpenDriverAgentHandle =
> RestExInstance->OpenDriverAgentHandle;
> +      OpenDriverControllerHandle =
> RestExInstance->OpenDriverControllerHandle;
> +      HandleOfProtocolInterfacePtr =
> &RestExInstance->RestExChildHandle;
> +      Interface = (VOID **)&RestExInstance->RestExProtocolInterface;
> +    }
> +    Status = gBS->InstallProtocolInterface (
> +                    &ControllerHandle,
> +                    gRequiredProtocol [Index].DiscoveredProtocolGuid,
> +                    EFI_NATIVE_INTERFACE,
> +                    ProtocolDiscoverIdPtr
> +                    );
> +    if (EFI_ERROR (Status)) {
> +      Index ++;
> +      if (Index == (sizeof(gRequiredProtocol) /
> sizeof(REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> +        break;
> +      }
> +      continue;
> +    }
> +    //
> +    // Create service binding child and open it BY_DRIVER.
> +    //
> +    Status = NetLibCreateServiceChild (
> +              ControllerHandle,
> +              This->ImageHandle,
> +              gRequiredProtocol
> [Index].RequiredServiceBindingProtocolGuid,
> +              HandleOfProtocolInterfacePtr
> +              );
> +    if (!EFI_ERROR (Status)) {
> +      Status = gBS->OpenProtocol (
> +                    *HandleOfProtocolInterfacePtr,
> +                    gRequiredProtocol [Index].RequiredProtocolGuid,
> +                    Interface,
> +                    OpenDriverAgentHandle,
> +                    OpenDriverControllerHandle,
> +                    EFI_OPEN_PROTOCOL_BY_DRIVER
> +                    );
> +      if (!EFI_ERROR (Status)) {
> +        if (EfiRedfishDiscoverProtocolHandle == NULL &&
> +            (gRequiredProtocol [Index].ProtocolType ==
> ProtocolTypeRestEx) &&
> +            !IsListEmpty (&mEfiRedfishDiscoverNetworkInterface)
> +            ) {
> +          // Install the fisrt Redfish Discover Protocol when EFI REST EX
> protcol is discovered.
> +          // This ensures EFI REST EX is ready while
> EFI_REDFISH_DISCOVER_PROTOCOL consumer acquires
> +          // Redfish serivce over network interface.
> +
> +          Status = gBS->InstallProtocolInterface (
> +                          &EfiRedfishDiscoverProtocolHandle,
> +                          &gEfiRedfishDiscoverProtocolGuid,
> +                          EFI_NATIVE_INTERFACE,
> +                          (VOID *)&mRedfishDiscover
> +                          );
> +        } else if (EfiRedfishDiscoverProtocolHandle != NULL &&
> NewNetworkInterfaceInstalled) {
> +           Status = gBS->ReinstallProtocolInterface (
> +                            EfiRedfishDiscoverProtocolHandle,
> +                            &gEfiRedfishDiscoverProtocolGuid,
> +                            (VOID *)&mRedfishDiscover,
> +                            (VOID *)&mRedfishDiscover
> +                            );
> +           NewNetworkInterfaceInstalled = FALSE;
> +        }
> +      }
> +      return Status;
> +    } else {
> +      Index ++;
> +      if (Index == (sizeof(gRequiredProtocol) /
> sizeof(REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> +        break;
> +      }
> +      continue;
> +    }
> +  } while (Index < (sizeof(gRequiredProtocol) /
> sizeof(REDFISH_DISCOVER_REQUIRED_PROTOCOL)));
> +  return EFI_UNSUPPORTED;
> +}
> +/**
> +  Close the protocol opened for Redfish discovery. This function also
> destories
> +  the network services.
> +
> +  @param[in]  ThisBindingProtocol     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]  ThisRequiredProtocol    Pointer to the instance of
> REDFISH_DISCOVER_REQUIRED_PROTOCOL.
> +  @param[in]  DriverAgentHandle      Driver agent handle which used
> to open protocol earlier.
> +  @param[in]  DriverControllerHandle Driver controller handle which used
> to open protocol earlier.
> +
> +  @retval EFI_SUCCESS                Prorocol is closed successfully.
> +  @retval Others                     Prorocol is closed
> unsuccessfully.
> +
> +**/
> +EFI_STATUS
> +CloseProtocolService (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *ThisBindingProtocol,
> +  IN EFI_HANDLE  ControllerHandle,
> +  IN REDFISH_DISCOVER_REQUIRED_PROTOCOL *ThisRequiredProtocol,
> +  IN EFI_HANDLE DriverAgentHandle,
> +  IN EFI_HANDLE DriverControllerHandle
> +)
> +{
> +  EFI_STATUS Status;
> +
> +  Status = gBS->CloseProtocol (
> +                   ControllerHandle,
> +                   ThisRequiredProtocol->RequiredProtocolGuid,
> +                   DriverAgentHandle,
> +                   DriverControllerHandle
> +                   );
> +  if (!EFI_ERROR (Status)) {
> +    NetLibDestroyServiceChild(
> +      ControllerHandle,
> +      ThisBindingProtocol->ImageHandle,
> +      ThisRequiredProtocol->RequiredServiceBindingProtocolGuid,
> +      ControllerHandle
> +      );
> +  }
> +  return Status;
> +}
> +/**
> +  Stop the services on network interface.
> +
> +  @param[in]  ThisBindingProtocol  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.
> +  @retval EFI_SUCCESS              One of required protocol is found.
> +  @retval Others                   Faile to stop the services on
> network interface.
> +**/
> +EFI_STATUS
> +StopServiceOnNetworkInterface (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *ThisBindingProtocol,
> +  IN EFI_HANDLE ControllerHandle
> +  )
> +{
> +  UINT32 Index;
> +  EFI_STATUS Status;
> +  VOID *Interface;
> +  EFI_TPL OldTpl;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface;
> +  EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL
> *RestExInstance;
> +
> +  for (Index = 0; Index < (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL)); Index ++) {
> +    Status = gBS->HandleProtocol (
> +                  ControllerHandle,
> +                  gRequiredProtocol [Index].RequiredProtocolGuid,
> +                  (VOID **)&Interface
> +                  );
> +    if (!EFI_ERROR (Status)) {
> +      if (gRequiredProtocol [Index].ProtocolType != ProtocolTypeRestEx) {
> +        if (IsListEmpty (&mEfiRedfishDiscoverNetworkInterface)) {
> +          return EFI_NOT_FOUND;
> +        }
> +        OldTpl = gBS->RaiseTPL
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_TPL);
> +        ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
> +        while (TRUE) {
> +          if
> (ThisNetworkInterface->NetworkInterfaceProtocolInfo.ProtocolControllerHan
> dle == ControllerHandle) {
> +
> +            Status = CloseProtocolService ( // Close protocol and destroy
> service.
> +                       ThisBindingProtocol,
> +                       ControllerHandle,
> +                       &gRequiredProtocol [Index],
> +
> ThisNetworkInterface->OpenDriverAgentHandle,
> +
> ThisNetworkInterface->OpenDriverControllerHandle
> +                       );
> +            if (!EFI_ERROR (Status)) {
> +              Status = DestroyRedfishNetwrokInterface
> (ThisNetworkInterface);
> +            }
> +            gBS->RestoreTPL (OldTpl);
> +            // Reinstall Redfish Discover protocol to notify network
> +            // interface change.
> +
> +            Status = gBS->ReinstallProtocolInterface (
> +                            EfiRedfishDiscoverProtocolHandle,
> +                            &gEfiRedfishDiscoverProtocolGuid,
> +                            (VOID *)&mRedfishDiscover,
> +                            (VOID *)&mRedfishDiscover
> +                            );
> +            if (EFI_ERROR (Status)) {
> +              DEBUG((DEBUG_ERROR, "%a: Reinstall
> gEfiRedfishDiscoverProtocolGuid fail.", __FUNCTION__));
> +            }
> +            return Status;
> +          }
> +          if (IsNodeAtEnd (&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry)) {
> +            break;
> +          }
> +          ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *)GetNextNode(&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterface->Entry);
> +        };
> +        gBS->RestoreTPL (OldTpl);
> +      } else {
> +        if (IsListEmpty (&mEfiRedfishDiscoverRestExInstance)) {
> +          return EFI_NOT_FOUND;
> +        }
> +        OldTpl = gBS->RaiseTPL
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_TPL);
> +        RestExInstance =
> (EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverRestExInstance);
> +        while (TRUE) {
> +          if (RestExInstance->RestExChildHandle == ControllerHandle) {
> +            Status = CloseProtocolService ( // Close REST_EX protocol.
> +                       ThisBindingProtocol,
> +                       ControllerHandle,
> +                       &gRequiredProtocol [Index],
> +                       RestExInstance->OpenDriverAgentHandle,
> +                       RestExInstance->OpenDriverControllerHandle
> +                       );
> +            RemoveEntryList (&RestExInstance->Entry);
> +            FreePool ((VOID *)RestExInstance);
> +            mNumRestExInstance --;
> +            gBS->RestoreTPL (OldTpl);
> +            return Status;
> +          }
> +          if (IsNodeAtEnd (&mEfiRedfishDiscoverRestExInstance,
> &RestExInstance->Entry)) {
> +            break;
> +          }
> +          RestExInstance =
> (EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL
> *)GetNextNode(&mEfiRedfishDiscoverRestExInstance,
> &RestExInstance->Entry);
> +        };
> +        gBS->RestoreTPL (OldTpl);
> +      }
> +    }
> +  }
> +  return EFI_NOT_FOUND;
> +}
> +/**
> +  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
> +RedfishDiscoverDriverBindingSupported (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  )
> +{
> +  return TestForRequiredProtocols (This, ControllerHandle);
> +}
> +
> +/**
> +  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
> +RedfishDiscoverDriverBindingStart (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  )
> +{
> +  return BuildupNetworkInterface (This, ControllerHandle);
> +}
> +
> +/**
> +  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
> +RedfishDiscoverDriverBindingStop (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN UINTN                        NumberOfChildren,
> +  IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
> +  )
> +{
> +  return StopServiceOnNetworkInterface (This, ControllerHandle);
> +}
> +
> +EFI_DRIVER_BINDING_PROTOCOL gRedfishDiscoverDriverBinding = {
> +  RedfishDiscoverDriverBindingSupported,
> +  RedfishDiscoverDriverBindingStart,
> +  RedfishDiscoverDriverBindingStop,
> +  REDFISH_DISCOVER_VERSION,
> +  NULL,
> +  NULL
> +};
> +
> +/**
> +  This is the declaration of an EFI image entry point.
> +
> +  @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
> +RedfishDiscoverEntryPoint (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  )
> +{
> +  EFI_STATUS Status;
> +
> +  Status = EFI_SUCCESS;
> +  InitializeListHead (&mRedfishDiscoverList);
> +  InitializeListHead (&mRedfishInstanceList);
> +  InitializeListHead (&mEfiRedfishDiscoverNetworkInterface);
> +  InitializeListHead (&mEfiRedfishDiscoverRestExInstance);
> +  //
> +  // Install binding protoocl to obtain UDP and REST EX protocol.
> +  //
> +  Status = EfiLibInstallDriverBindingComponentName2 (
> +             ImageHandle,
> +             SystemTable,
> +             &gRedfishDiscoverDriverBinding,
> +             ImageHandle,
> +             &gRedfishDiscoverComponentName,
> +             &gRedfishDiscoverComponentName2
> +             );
> +  return Status;
> +}
> +
> +/**
> +  This is the unload handle for Redfish discover module.
> +
> +  Disconnect the driver specified by ImageHandle from all the devices in
the
> handle database.
> +  Uninstall all the protocols installed in the driver entry point.
> +
> +  @param[in] ImageHandle           The drivers' driver image.
> +
> +  @retval    EFI_SUCCESS           The image is unloaded.
> +  @retval    Others                Failed to unload the image.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishDiscoverUnload (
> +  IN EFI_HANDLE ImageHandle
> +  )
> +{
> +  EFI_STATUS Status;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface;
> +
> +  Status = EFI_SUCCESS;
> +  // Destroy all network interfaces found by EFI Redfish Discover driver
and
> +  // stop services created for Redfish Discover.
> +
> +  while (!IsListEmpty (&mEfiRedfishDiscoverNetworkInterface)) {
> +    ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
> +    StopServiceOnNetworkInterface (&gRedfishDiscoverDriverBinding,
> ThisNetworkInterface->NetworkInterfaceProtocolInfo.ProtocolControllerHan
> dle);
> +  };
> +  // Disconnect EFI Redfish discover driver controller to notify the
> +  // clinet which uses .EFI Redfish discover protocol.
> +
> +  if (EfiRedfishDiscoverProtocolHandle != NULL) {
> +    //
> +    // Notify user EFI_REDFISH_DISCOVER_PROTOCOL is unloaded.
> +    //
> +    gBS->DisconnectController (EfiRedfishDiscoverProtocolHandle, NULL,
> NULL);
> +    Status = gBS->UninstallProtocolInterface(
> +                    EfiRedfishDiscoverProtocolHandle,
> +                    &gEfiRedfishDiscoverProtocolGuid,
> +                    (VOID *)&mRedfishDiscover
> +                    );
> +  }
> +  return Status;
> +}
> diff --git a/RedfishPkg/RedfishDiscoverDxe/RedfishSmbiosHostInterface.c
> b/RedfishPkg/RedfishDiscoverDxe/RedfishSmbiosHostInterface.c
> new file mode 100644
> index 0000000000..f3ad36ec3a
> --- /dev/null
> +++ b/RedfishPkg/RedfishDiscoverDxe/RedfishSmbiosHostInterface.c
> @@ -0,0 +1,118 @@
> +/** @file
> +  RedfishSmbiosHostInterface.c
> +
> +  Discover Redfish SMBIOS Host Interface.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishDiscoverInternal.h"
> +
> +SMBIOS_TABLE_TYPE42  *mType42Record;
> +
> +/**
> +  The function gets information reported in Redfish Host Interface.
> +
> +  It simply frees the packet.
> +
> +  @param[in]  Smbios           SMBIOS protocol.
> +  @param[out] DeviceDescriptor Pointer to REDFISH_INTERFACE_DATA.
> +  @param[out] ProtocolData     Pointer to
> REDFISH_OVER_IP_PROTOCOL_DATA.
> +
> +  @retval EFI_SUCCESS    Get host interface succesfully.
> +  @retval Otherwise      Fail to tet host interface.
> +
> +**/
> +EFI_STATUS
> +RedfishGetHostInterfaceProtocolData (
> +  IN EFI_SMBIOS_PROTOCOL              *Smbios,
> +  OUT REDFISH_INTERFACE_DATA          **DeviceDescriptor,
> +  OUT REDFISH_OVER_IP_PROTOCOL_DATA   **ProtocolData
> +  )
> +{
> +  EFI_STATUS                        Status;
> +  EFI_SMBIOS_HANDLE                 SmbiosHandle;
> +  EFI_SMBIOS_TABLE_HEADER           *Record;
> +  UINT16                            Offset;
> +  UINT8                             *RecordTmp;
> +  UINT8                             ProtocolLength;
> +  UINT8                             SpecificDataLen;
> +
> +  if ((Smbios == NULL) || (ProtocolData == NULL)) {
> +    return EFI_INVALID_PARAMETER;
> +  }
> +
> +  SmbiosHandle = SMBIOS_HANDLE_PI_RESERVED;
> +  Status = Smbios->GetNext (Smbios, &SmbiosHandle, NULL, &Record,
> NULL);
> +  while (!EFI_ERROR (Status) && SmbiosHandle !=
> SMBIOS_HANDLE_PI_RESERVED) {
> +    if (Record->Type ==
> SMBIOS_TYPE_MANAGEMENT_CONTROLLER_HOST_INTERFACE) {
> +      //
> +      // Check Interface Type, should be Network Host Interface = 40h
> +      //
> +      mType42Record = (SMBIOS_TABLE_TYPE42 *) Record;
> +      if (mType42Record->InterfaceType ==
> MCHostInterfaceTypeNetworkHostInterface) {
> +        ASSERT (Record->Length >= 9);
> +        Offset = 5;
> +        RecordTmp = (UINT8 *) Record + Offset;
> +        //
> +        // Get interface specific data length.
> +        //
> +        SpecificDataLen = *RecordTmp;
> +        Offset += 1;
> +        RecordTmp = (UINT8 *) Record + Offset;
> +
> +        //
> +        // Check Device Type, only PCI/PCIe Network Interface v2 is
> supported now.
> +        //
> +        if (*RecordTmp ==
> REDFISH_HOST_INTERFACE_DEVICE_TYPE_PCI_PCIE_V2) {
> +          ASSERT (SpecificDataLen == sizeof
> (PCI_OR_PCIE_INTERFACE_DEVICE_DESCRIPTOR_V2) + 1);
> +          *DeviceDescriptor = (REDFISH_INTERFACE_DATA *)RecordTmp;
> +          Offset = Offset + SpecificDataLen;
> +          RecordTmp = (UINT8 *) Record + Offset;
> +          //
> +          // Check Protocol count. if > 1, only use the first protocol.
> +          //
> +          ASSERT (*RecordTmp == 1);
> +          Offset += 1;
> +          RecordTmp = (UINT8 *) Record + Offset;
> +          //
> +          // Check protocol identifier.
> +          //
> +          if (*RecordTmp == MCHostInterfaceProtocolTypeRedfishOverIP)
> {
> +            Offset += 1;
> +            RecordTmp = (UINT8 *) Record + Offset;
> +            ProtocolLength = *RecordTmp;
> +
> +            Offset += 1;
> +            RecordTmp = (UINT8 *) Record + Offset;
> +
> +            //
> +            // This SMBIOS record is invalid, if the length of protocol
> specific data for
> +            // Redfish Over IP protocol is wrong.
> +            //
> +            if ((*(RecordTmp + 90) + sizeof
> (REDFISH_OVER_IP_PROTOCOL_DATA) - 1) != ProtocolLength) {
> +              return EFI_SECURITY_VIOLATION;
> +            }
> +
> +            Offset += ProtocolLength;
> +            //
> +            // This SMBIOS record is invalid, if the length is smaller
than
> the offset.
> +            //
> +            if (Offset > mType42Record->Hdr.Length) {
> +              return EFI_SECURITY_VIOLATION;
> +            }
> +            *ProtocolData = (REDFISH_OVER_IP_PROTOCOL_DATA
> *)RecordTmp;
> +            return EFI_SUCCESS;
> +          }
> +        }
> +      }
> +    }
> +    Status = Smbios->GetNext (Smbios, &SmbiosHandle, NULL, &Record,
> NULL);
> +  }
> +
> +  *ProtocolData = NULL;
> +  return EFI_NOT_FOUND;
> +}
> --
> 2.17.1
> 
> 
> 
> 
> 





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