| 1 | /** @file
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| 2 | RedfishSmbiosHostInterface.c
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| 3 |
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| 4 | Discover Redfish SMBIOS Host Interface.
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| 5 |
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| 6 | (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
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| 7 |
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| 8 | SPDX-License-Identifier: BSD-2-Clause-Patent
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| 9 |
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| 10 | **/
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| 11 |
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| 12 | #include "RedfishDiscoverInternal.h"
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| 13 |
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| 14 | SMBIOS_TABLE_TYPE42 *mType42Record;
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| 15 |
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| 16 | /**
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| 17 | The function gets information reported in Redfish Host Interface.
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| 18 |
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| 19 | It simply frees the packet.
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| 20 |
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| 21 | @param[in] Smbios SMBIOS protocol.
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| 22 | @param[out] DeviceDescriptor Pointer to REDFISH_INTERFACE_DATA.
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| 23 | @param[out] ProtocolData Pointer to REDFISH_OVER_IP_PROTOCOL_DATA.
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| 24 |
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| 25 | @retval EFI_SUCCESS Get host interface succesfully.
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| 26 | @retval Otherwise Fail to tet host interface.
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| 27 |
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| 28 | **/
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| 29 | EFI_STATUS
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| 30 | RedfishGetHostInterfaceProtocolData (
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| 31 | IN EFI_SMBIOS_PROTOCOL *Smbios,
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| 32 | OUT REDFISH_INTERFACE_DATA **DeviceDescriptor,
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| 33 | OUT REDFISH_OVER_IP_PROTOCOL_DATA **ProtocolData
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| 34 | )
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| 35 | {
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| 36 | EFI_STATUS Status;
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| 37 | EFI_SMBIOS_HANDLE SmbiosHandle;
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| 38 | EFI_SMBIOS_TABLE_HEADER *Record;
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| 39 | UINT16 Offset;
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| 40 | UINT8 *RecordTmp;
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| 41 | UINT8 ProtocolLength;
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| 42 | UINT8 SpecificDataLen;
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| 43 |
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| 44 | if ((Smbios == NULL) || (ProtocolData == NULL)) {
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| 45 | return EFI_INVALID_PARAMETER;
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| 46 | }
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| 47 |
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| 48 | SmbiosHandle = SMBIOS_HANDLE_PI_RESERVED;
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| 49 | Status = Smbios->GetNext (Smbios, &SmbiosHandle, NULL, &Record, NULL);
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| 50 | while (!EFI_ERROR (Status) && SmbiosHandle != SMBIOS_HANDLE_PI_RESERVED) {
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| 51 | if (Record->Type == SMBIOS_TYPE_MANAGEMENT_CONTROLLER_HOST_INTERFACE) {
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| 52 | //
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| 53 | // Check Interface Type, should be Network Host Interface = 40h
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| 54 | //
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| 55 | mType42Record = (SMBIOS_TABLE_TYPE42 *) Record;
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| 56 | if (mType42Record->InterfaceType == MCHostInterfaceTypeNetworkHostInterface) {
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| 57 | ASSERT (Record->Length >= 9);
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| 58 | Offset = 5;
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| 59 | RecordTmp = (UINT8 *) Record + Offset;
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| 60 | //
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| 61 | // Get interface specific data length.
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| 62 | //
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| 63 | SpecificDataLen = *RecordTmp;
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| 64 | Offset += 1;
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| 65 | RecordTmp = (UINT8 *) Record + Offset;
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| 66 |
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| 67 | //
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| 68 | // Check Device Type, only PCI/PCIe Network Interface v2 is supported now.
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| 69 | //
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| 70 | if (*RecordTmp == REDFISH_HOST_INTERFACE_DEVICE_TYPE_PCI_PCIE_V2) {
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| 71 | ASSERT (SpecificDataLen == sizeof (PCI_OR_PCIE_INTERFACE_DEVICE_DESCRIPTOR_V2) + 1);
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| 72 | *DeviceDescriptor = (REDFISH_INTERFACE_DATA *)RecordTmp;
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| 73 | Offset = Offset + SpecificDataLen;
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| 74 | RecordTmp = (UINT8 *) Record + Offset;
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| 75 | //
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| 76 | // Check Protocol count. if > 1, only use the first protocol.
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| 77 | //
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| 78 | ASSERT (*RecordTmp == 1);
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| 79 | Offset += 1;
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| 80 | RecordTmp = (UINT8 *) Record + Offset;
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| 81 | //
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| 82 | // Check protocol identifier.
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| 83 | //
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| 84 | if (*RecordTmp == MCHostInterfaceProtocolTypeRedfishOverIP) {
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| 85 | Offset += 1;
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| 86 | RecordTmp = (UINT8 *) Record + Offset;
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| 87 | ProtocolLength = *RecordTmp;
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| 88 |
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| 89 | Offset += 1;
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| 90 | RecordTmp = (UINT8 *) Record + Offset;
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| 91 |
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| 92 | //
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| 93 | // This SMBIOS record is invalid, if the length of protocol specific data for
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| 94 | // Redfish Over IP protocol is wrong.
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| 95 | //
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| 96 | if ((*(RecordTmp + 90) + sizeof (REDFISH_OVER_IP_PROTOCOL_DATA) - 1) != ProtocolLength) {
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| 97 | return EFI_SECURITY_VIOLATION;
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| 98 | }
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| 99 |
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| 100 | Offset += ProtocolLength;
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| 101 | //
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| 102 | // This SMBIOS record is invalid, if the length is smaller than the offset.
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| 103 | //
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| 104 | if (Offset > mType42Record->Hdr.Length) {
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| 105 | return EFI_SECURITY_VIOLATION;
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| 106 | }
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| 107 | *ProtocolData = (REDFISH_OVER_IP_PROTOCOL_DATA *)RecordTmp;
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| 108 | return EFI_SUCCESS;
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| 109 | }
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| 110 | }
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| 111 | }
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| 112 | }
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| 113 | Status = Smbios->GetNext (Smbios, &SmbiosHandle, NULL, &Record, NULL);
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| 114 | }
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| 115 |
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| 116 | *ProtocolData = NULL;
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| 117 | return EFI_NOT_FOUND;
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| 118 | }
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