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

Abner Chang abner.chang at hpe.com
Wed Apr 7 06:26:44 UTC 2021


BZ was created for this.
https://bugzilla.tianocore.org/show_bug.cgi?id=2906

I will update the commit message with the feedback from reviewer if any.
Thanks

> -----Original Message-----
> From: devel at edk2.groups.io [mailto:devel at edk2.groups.io] On Behalf Of
> gaoliming
> Sent: Wednesday, April 7, 2021 1:20 PM
> To: devel at edk2.groups.io; Chang, Abner (HPS SW/FW Technologist)
> <abner.chang at hpe.com>
> Cc: Wang, Nickle (HPS SW) <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>
> Subject: 回复: [edk2-devel] [PATCH] RedfishPkg/RedfishDiscoverDxe: EFI
> Redfish Discover Protocol
> 
> 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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