[edk2-redfish-client][PATCH 2/6] RedfishClientPkg: Introduce Redfish version library

["Nickle Wang" <nicklew@nvidia.com>]

Add RedfishVersionLib in order to get Redfish version hosted at BMC.
When there is trouble to get Redfish support version, the default
version is retrieved from pre-defined PCD value.

Signed-off-by: Nickle Wang <nicklew@nvidia.com>
Cc: Abner Chang <abner.chang@amd.com>
Cc: Igor Kulchytskyy <igork@ami.com>
---
 RedfishClientPkg/RedfishClientPkg.dec         |   4 +-
 RedfishClientPkg/RedfishClientLibs.dsc.inc    |   1 +
 .../RedfishVersionLib/RedfishVersionLib.inf   |  50 +++++
 .../Include/Library/RedfishVersionLib.h       |  30 +++
 RedfishClientPkg/Include/RedfishBase.h        |  22 ++
 .../RedfishVersionLib/RedfishVersionLib.c     | 202 ++++++++++++++++++
 6 files changed, 308 insertions(+), 1 deletion(-)
 create mode 100644 RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.inf
 create mode 100644 RedfishClientPkg/Include/Library/RedfishVersionLib.h
 create mode 100644 RedfishClientPkg/Include/RedfishBase.h
 create mode 100644 RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.c

diff --git a/RedfishClientPkg/RedfishClientPkg.dec b/RedfishClientPkg/RedfishClientPkg.dec
index 39b2f5ba..2ce51d14 100644
--- a/RedfishClientPkg/RedfishClientPkg.dec
+++ b/RedfishClientPkg/RedfishClientPkg.dec
@@ -22,6 +22,7 @@
 [LibraryClasses]
   RedfishFeatureUtilityLib|Include/Library/RedfishFeatureUtilityLib.h
   RedfishEventLib|Include/Library/RedfishEventLib.h
+  RedfishVersionLib|Include/Library/RedfishVersionLib.h
 
 [LibraryClasses.Common.Private]
   ##  @libraryclass Redfish Helper Library
@@ -52,4 +53,5 @@
   # { 0x7CE88FB3, 0x4BD7, 0x4679, { 0x87, 0xA8, 0xA8, 0xD8, 0xDE, 0xE5, 0x0D, 0x2B }}
   #
   gEfiRedfishClientPkgTokenSpaceGuid.PcdEdkIIRedfishFeatureDriverStartupEventGuid|{0xB3, 0x8F, 0xE8, 0x7C, 0xD7, 0x4B, 0x79, 0x46, 0x87, 0xA8, 0xA8, 0xD8, 0xDE, 0xE5, 0x0D, 0x2B}|VOID*|0x10000003
-
+  ## Default Redfish version string
+  gEfiRedfishClientPkgTokenSpaceGuid.PcdDefaultRedfishVersion|L"v1"|VOID*|0x10000004
diff --git a/RedfishClientPkg/RedfishClientLibs.dsc.inc b/RedfishClientPkg/RedfishClientLibs.dsc.inc
index ce1c27d8..1cf04069 100644
--- a/RedfishClientPkg/RedfishClientLibs.dsc.inc
+++ b/RedfishClientPkg/RedfishClientLibs.dsc.inc
@@ -29,3 +29,4 @@
   ConverterCommonLib|RedfishClientPkg/ConverterLib/edk2library/ConverterCommonLib/ConverterCommonLib.inf
 
   RedfishEventLib|RedfishClientPkg/Library/RedfishEventLib/RedfishEventLib.inf
+  RedfishVersionLib|RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.inf
diff --git a/RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.inf b/RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.inf
new file mode 100644
index 00000000..34d13d64
--- /dev/null
+++ b/RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.inf
@@ -0,0 +1,50 @@
+## @file
+#
+#  (C) Copyright 2022 Hewlett Packard Enterprise Development LP<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010006
+  BASE_NAME                      = RedfishVersionLib
+  FILE_GUID                      = 396A7508-B611-49F7-9C81-DAD96B526B61
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = RedfishVersionLib| DXE_DRIVER
+  CONSTRUCTOR                    = RedfishVersionLibConstructor
+  DESTRUCTOR                     = RedfishVersionLibDestructor
+
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources]
+  RedfishVersionLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  RedfishPkg/RedfishPkg.dec
+  RedfishClientPkg/RedfishClientPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  MemoryAllocationLib
+  PcdLib
+  RedfishLib
+  JsonLib
+
+[Protocols]
+
+[Pcd]
+  gEfiRedfishClientPkgTokenSpaceGuid.PcdDefaultRedfishVersion
+
+[BuildOptions]
+  #
+  # NOTE: /wd4706 disables the following Visual Studio compiler warning in Jansson:
+  #       "C4706: assignment within conditional expression"
+  #
+  MSFT:*_*_*_CC_FLAGS = /wd4706
diff --git a/RedfishClientPkg/Include/Library/RedfishVersionLib.h b/RedfishClientPkg/Include/Library/RedfishVersionLib.h
new file mode 100644
index 00000000..319f22bd
--- /dev/null
+++ b/RedfishClientPkg/Include/Library/RedfishVersionLib.h
@@ -0,0 +1,30 @@
+/** @file
+  This file defines the Redfish version Library interface.
+
+  (C) Copyright 2022 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef REDFISH_VERSION_LIB_H_
+#define REDFISH_VERSION_LIB_H_
+
+/**
+  Query HTTP request to BMC with given redfish service and return redfish
+  version information. If there is troulbe to get Redfish version on BMC,
+  The value of PcdDefaultRedfishVersion is returned.
+
+  It's call responsibility to release returned buffer.
+
+  @param[in]   Service  Redfish service instance
+
+  @retval EFI_STRING  Redfish version string. NULL while error occurs.
+
+**/
+EFI_STRING
+RedfishGetVersion (
+  IN REDFISH_SERVICE  *Service
+  );
+
+#endif
diff --git a/RedfishClientPkg/Include/RedfishBase.h b/RedfishClientPkg/Include/RedfishBase.h
new file mode 100644
index 00000000..1abe9517
--- /dev/null
+++ b/RedfishClientPkg/Include/RedfishBase.h
@@ -0,0 +1,22 @@
+/** @file
+  Redfish base header file.
+
+  (C) Copyright 2022 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef EFI_REDFISH_BASE_H_
+#define EFI_REDFISH_BASE_H_
+
+#define IS_EMPTY_STRING(a)  ((a) == NULL || (a)[0] == '\0')
+#define REDFISH_DEBUG_TRACE  DEBUG_INFO
+
+///
+/// This GUID is used for an EFI Variable that stores the Redfish data.
+///
+EFI_GUID  mRedfishVariableGuid = { 0x91c46a3d, 0xed1a, 0x477b, { 0xa5, 0x33, 0x87, 0x2d, 0xcd, 0xb0, 0xfc, 0xc1 }
+};
+
+#endif
diff --git a/RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.c b/RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.c
new file mode 100644
index 00000000..1fd76d7f
--- /dev/null
+++ b/RedfishClientPkg/Library/RedfishVersionLib/RedfishVersionLib.c
@@ -0,0 +1,202 @@
+/** @file
+  Redfish version library implementation
+
+  (C) Copyright 2022 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Uefi.h>
+#include <RedfishBase.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/RedfishLib.h>
+#include <Library/JsonLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/RedfishVersionLib.h>
+
+#define REDFISH_VERSION_DEFAULT_STRING  L"v1"
+#define REDFISH_ROOT_URI                "/redfish"
+
+REDFISH_SERVICE  *mCacheService;
+EFI_STRING       mVersionCache;
+UINTN            mVersionStringSize;
+
+/**
+  Cache the redfish service version for later use so we don't have to query
+  HTTP request everytime.
+
+  @param[in]   Service  Redfish service instance
+  @param[in]   Version  Version string to cache
+
+  @retval EFI_SUCCESS   Version is saved in cache successfully.
+  @retval Others
+
+**/
+EFI_STATUS
+CacheVersion (
+  IN REDFISH_SERVICE  *Service,
+  IN EFI_STRING       Version
+  )
+{
+  if ((Service == NULL) || IS_EMPTY_STRING (Version)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  if (mCacheService == Service) {
+    return EFI_ALREADY_STARTED;
+  }
+
+  mCacheService = Service;
+  if (mVersionCache != NULL) {
+    FreePool (mVersionCache);
+  }
+
+  mVersionStringSize = StrSize (Version);
+  mVersionCache      = AllocateCopyPool (mVersionStringSize, Version);
+  if (mVersionCache == NULL) {
+    mCacheService = NULL;
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Query HTTP request to BMC with given redfish service and return redfish
+  version information. If there is troulbe to get Redfish version on BMC,
+  The value of PcdDefaultRedfishVersion is returned.
+
+  It's call responsibility to release returned buffer.
+
+  @param[in]   Service  Redfish service instance
+
+  @retval EFI_STRING  Redfish version string. NULL while error occurs.
+
+**/
+EFI_STRING
+RedfishGetVersion (
+  IN REDFISH_SERVICE  *Service
+  )
+{
+  EFI_STATUS        Status;
+  EFI_STRING        VersionString;
+  REDFISH_RESPONSE  Response;
+  EDKII_JSON_VALUE  JsonValue;
+  EDKII_JSON_VALUE  N;
+  CHAR8             *Key;
+  EDKII_JSON_VALUE  Value;
+
+  VersionString = NULL;
+
+  if (Service == NULL) {
+    goto ON_ERROR;
+  }
+
+  //
+  // Use cache to prevent HTTP connection.
+  //
+  if (Service == mCacheService) {
+    return AllocateCopyPool (mVersionStringSize, mVersionCache);
+  }
+
+  //
+  // Get resource from redfish service.
+  //
+  Status = RedfishGetByUri (
+             Service,
+             REDFISH_ROOT_URI,
+             &Response
+             );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "%a, RedfishGetByService to %a failed: %r\n", __FUNCTION__, REDFISH_ROOT_URI, Status));
+    if (Response.Payload != NULL) {
+      RedfishDumpPayload (Response.Payload);
+      RedfishFreeResponse (
+        NULL,
+        0,
+        NULL,
+        Response.Payload
+        );
+      Response.Payload = NULL;
+    }
+
+    goto ON_ERROR;
+  }
+
+  JsonValue = RedfishJsonInPayload (Response.Payload);
+  if ((JsonValue == NULL) || !JsonValueIsObject (JsonValue)) {
+    goto ON_ERROR;
+  }
+
+  EDKII_JSON_OBJECT_FOREACH_SAFE (JsonValue, N, Key, Value) {
+    if ((Key[0] == 'v') && JsonValueIsString (Value)) {
+      VersionString = JsonValueGetUnicodeString (Value);
+      break;
+    }
+  }
+
+  if (VersionString != NULL) {
+    CacheVersion (Service, VersionString);
+    return VersionString;
+  }
+
+ON_ERROR:
+
+  VersionString = (CHAR16 *)PcdGetPtr (PcdDefaultRedfishVersion);
+  if (VersionString == NULL) {
+    VersionString = REDFISH_VERSION_DEFAULT_STRING;
+  }
+
+  return AllocateCopyPool (StrSize (VersionString), VersionString);
+}
+
+/**
+
+  Initial redfish version library instace.
+
+  @param[in] ImageHandle     The image handle.
+  @param[in] SystemTable     The system table.
+
+  @retval  EFI_SUCEESS  Install Boot manager menu success.
+  @retval  Other        Return error status.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishVersionLibConstructor (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  mCacheService      = NULL;
+  mVersionCache      = NULL;
+  mVersionStringSize = 0;
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Release allocated resource.
+
+  @param[in] ImageHandle       Handle that identifies the image to be unloaded.
+  @param[in] SystemTable      The system table.
+
+  @retval EFI_SUCCESS      The image has been unloaded.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishVersionLibDestructor (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  if (mVersionCache != NULL) {
+    FreePool (mVersionCache);
+  }
+
+  return EFI_SUCCESS;
+}
-- 
2.17.1