1 files changed, 118 insertions, 0 deletions
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;
+}