sdk/lib/dmilib/dmilib.c

   1 /*
   2  * PROJECT:     ReactOS DMI/SMBIOS Library
   3  * LICENSE:     GPL - See COPYING in the top level directory
   4  * FILE:        dmilib.c
   5  * PURPOSE:     SMBIOS table parsing functions
   6  * PROGRAMMERS: Timo Kreuzer (timo.kreuzer@reactos.org)
   7  * REFERENCES:  http://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.0.0.pdf
   8  */
   9
  10 #include "precomp.h"
  11
  12 static
  13 PCHAR
  14 GetDmiString(
  15     _In_ PDMI_HEADER Header,
  16     _In_ ULONG FieldOffset)
  17 {
  18     ULONG StringIndex;
  19     PCHAR String;
  20
  21     StringIndex = ((PUCHAR)Header)[FieldOffset];
  22     if (StringIndex == 0)
  23     {
  24         return NULL;
  25     }
  26
  27     String = (PCHAR)Header + Header->Length;
  28
  29     while (--StringIndex != 0)
  30     {
  31         while (*String != 0)
  32             String++;
  33
  34         String++;
  35     }
  36
  37     return String;
  38 }
  39
  40 VOID
  41 ParseSMBiosTables(
  42     _In_reads_bytes_(TableSize) PVOID SMBiosTables,
  43     _In_ ULONG TableSize,
  44     _Inout_updates_(ID_STRINGS_MAX) PCHAR * Strings)
  45 {
  46     PMSSmBios_RawSMBiosTables BiosTablesHeader = SMBiosTables;
  47     PDMI_HEADER Header;
  48     ULONG Remaining;
  49     PCHAR Data;
  50
  51     Header = (PDMI_HEADER)(&BiosTablesHeader->SMBiosData);
  52     Remaining = BiosTablesHeader->Size;
  53
  54     while (Remaining >= sizeof(*Header))
  55     {
  56         if (Header->Type == DMI_ENTRY_END_OF_TABLE)
  57             break;
  58
  59         switch (Header->Type)
  60         {
  61         case DMI_ENTRY_BIOS:
  62             if (Remaining < DMI_BIOS_SIZE)
  63                 return;
  64             Strings[BIOS_VENDOR] = GetDmiString(Header, DMI_BIOS_VENDOR);
  65             Strings[BIOS_VERSION] = GetDmiString(Header, DMI_BIOS_VERSION);
  66             Strings[BIOS_DATE] = GetDmiString(Header, DMI_BIOS_DATE);
  67             break;
  68
  69         case DMI_ENTRY_SYSTEM:
  70             if (Remaining < DMI_SYS_SIZE)
  71                 return;
  72             Strings[SYS_VENDOR] = GetDmiString(Header, DMI_SYS_VENDOR);
  73             Strings[SYS_PRODUCT] = GetDmiString(Header, DMI_SYS_PRODUCT);
  74             Strings[SYS_VERSION] = GetDmiString(Header, DMI_SYS_VERSION);
  75             Strings[SYS_SERIAL] = GetDmiString(Header, DMI_SYS_SERIAL);
  76             Strings[SYS_SKU] = GetDmiString(Header, DMI_SYS_SKU);
  77             Strings[SYS_FAMILY] = GetDmiString(Header, DMI_SYS_FAMILY);
  78             break;
  79
  80         case DMI_ENTRY_BASEBOARD:
  81             if (Remaining < DMI_BOARD_SIZE)
  82                 return;
  83             Strings[BOARD_VENDOR] = GetDmiString(Header, DMI_BOARD_VENDOR);
  84             Strings[BOARD_NAME] = GetDmiString(Header, DMI_BOARD_NAME);
  85             Strings[BOARD_VERSION] = GetDmiString(Header, DMI_BOARD_VERSION);
  86             Strings[BOARD_SERIAL] = GetDmiString(Header, DMI_BOARD_SERIAL);
  87             Strings[BOARD_ASSET_TAG] = GetDmiString(Header, DMI_BOARD_ASSET_TAG);
  88             break;
  89
  90         case DMI_ENTRY_CHASSIS:
  91         case DMI_ENTRY_ONBOARD_DEVICE:
  92         case DMI_ENTRY_OEMSTRINGS:
  93         // DMI_ENTRY_IPMI_DEV?
  94         // DMI_ENTRY_ONBOARD_DEV_EXT?
  95             break;
  96         }
  97
  98         Remaining -= Header->Length;
  99         Data = (PCHAR)Header + Header->Length;
 100
 101         /* Now loop until we find 2 zeroes */
 102         while ((Remaining >= 2) && ((Data[0] != 0) || (Data[1] != 0)))
 103         {
 104             Data++;
 105             Remaining--;
 106         }
 107
 108         if (Remaining < 2)
 109             break;
 110
 111         /* Go to the next header */
 112         Remaining -= 2;
 113         Header = (PDMI_HEADER)((PUCHAR)Data + 2);
 114     }
 115 }