mirror of
https://github.com/reactos/reactos.git
synced 2024-11-07 07:00:19 +00:00
184 lines
3.9 KiB
C
184 lines
3.9 KiB
C
/*
|
|
* PROJECT: ReactOS User-mode DMI/SMBIOS Helper Functions
|
|
* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
|
|
* PURPOSE: SMBIOS table parsing functions
|
|
* COPYRIGHT: Copyright 2018 Stanislav Motylkov
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
|
|
static UINT (WINAPI * pGetSystemFirmwareTable)(DWORD, DWORD, PVOID, DWORD);
|
|
static BOOL bInitAPI = FALSE;
|
|
|
|
static
|
|
VOID
|
|
InitializeAPI()
|
|
{
|
|
HANDLE hKernel;
|
|
|
|
pGetSystemFirmwareTable = NULL;
|
|
|
|
hKernel = GetModuleHandleW(L"kernel32.dll");
|
|
if (!hKernel)
|
|
return;
|
|
|
|
pGetSystemFirmwareTable = (void *)GetProcAddress(hKernel, "GetSystemFirmwareTable");
|
|
}
|
|
|
|
/* Load SMBIOS Data */
|
|
PVOID
|
|
LoadSMBiosData(
|
|
_Inout_updates_(ID_STRINGS_MAX) PCHAR * Strings)
|
|
{
|
|
PVOID pBuffer = NULL;
|
|
HKEY hKey;
|
|
DWORD dwType, dwCheck, dwBytes = 0;
|
|
|
|
if (!bInitAPI)
|
|
{
|
|
InitializeAPI();
|
|
bInitAPI = TRUE;
|
|
}
|
|
|
|
/* Try using GetSystemFirmwareTable (works on NT 5.2 and higher) */
|
|
if (pGetSystemFirmwareTable)
|
|
{
|
|
dwBytes = pGetSystemFirmwareTable('RSMB', 0, NULL, 0);
|
|
if (dwBytes > 0)
|
|
{
|
|
pBuffer = HeapAlloc(GetProcessHeap(), 0, dwBytes);
|
|
if (!pBuffer)
|
|
{
|
|
return NULL;
|
|
}
|
|
dwCheck = pGetSystemFirmwareTable('RSMB', 0, pBuffer, dwBytes);
|
|
if (dwCheck != dwBytes)
|
|
{
|
|
HeapFree(GetProcessHeap(), 0, pBuffer);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
if (dwBytes == 0)
|
|
{
|
|
/* Try using registry (works on NT 5.1) */
|
|
if (RegOpenKeyW(HKEY_LOCAL_MACHINE,
|
|
L"SYSTEM\\CurrentControlSet\\Services\\mssmbios\\Data",
|
|
&hKey) != ERROR_SUCCESS)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
if (RegQueryValueExW(hKey,
|
|
L"SMBiosData",
|
|
NULL,
|
|
&dwType,
|
|
NULL,
|
|
&dwBytes) != ERROR_SUCCESS || dwType != REG_BINARY)
|
|
{
|
|
RegCloseKey(hKey);
|
|
return NULL;
|
|
}
|
|
|
|
pBuffer = HeapAlloc(GetProcessHeap(), 0, dwBytes);
|
|
if (!pBuffer)
|
|
{
|
|
RegCloseKey(hKey);
|
|
return NULL;
|
|
}
|
|
|
|
if (RegQueryValueExW(hKey,
|
|
L"SMBiosData",
|
|
NULL,
|
|
&dwType,
|
|
pBuffer,
|
|
&dwBytes) != ERROR_SUCCESS || dwType != REG_BINARY)
|
|
{
|
|
HeapFree(GetProcessHeap(), 0, pBuffer);
|
|
RegCloseKey(hKey);
|
|
return NULL;
|
|
}
|
|
|
|
RegCloseKey(hKey);
|
|
}
|
|
ParseSMBiosTables(pBuffer, dwBytes, Strings);
|
|
return pBuffer;
|
|
}
|
|
|
|
/* Trim converted DMI string */
|
|
VOID
|
|
TrimDmiStringW(
|
|
_Inout_ PWSTR pStr)
|
|
{
|
|
SIZE_T Length;
|
|
UINT i = 0;
|
|
|
|
if (!pStr)
|
|
return;
|
|
|
|
Length = wcslen(pStr);
|
|
if (Length == 0)
|
|
return;
|
|
|
|
/* Trim leading spaces */
|
|
while (i < Length && pStr[i] <= L' ')
|
|
{
|
|
i++;
|
|
}
|
|
|
|
if (i > 0)
|
|
{
|
|
Length -= i;
|
|
memmove(pStr, pStr + i, (Length + 1) * sizeof(WCHAR));
|
|
}
|
|
|
|
/* Trim trailing spaces */
|
|
while (Length && pStr[Length-1] <= L' ')
|
|
{
|
|
pStr[Length-1] = L'\0';
|
|
--Length;
|
|
}
|
|
}
|
|
|
|
/* Convert string from SMBIOS */
|
|
SIZE_T
|
|
GetSMBiosStringW(
|
|
_In_ PCSTR DmiString,
|
|
_Out_ PWSTR pBuf,
|
|
_In_ DWORD cchBuf,
|
|
_In_ BOOL bTrim)
|
|
{
|
|
SIZE_T cChars;
|
|
|
|
if (!DmiString)
|
|
{
|
|
if (cchBuf >= 1)
|
|
{
|
|
*pBuf = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
cChars = MultiByteToWideChar(CP_OEMCP, 0, DmiString, -1, pBuf, cchBuf);
|
|
|
|
/* NULL-terminate string */
|
|
pBuf[min(cchBuf-1, cChars)] = L'\0';
|
|
|
|
if (bTrim)
|
|
{
|
|
TrimDmiStringW(pBuf);
|
|
}
|
|
|
|
return wcslen(pBuf);
|
|
}
|
|
|
|
/* Free SMBIOS Data */
|
|
VOID
|
|
FreeSMBiosData(
|
|
_In_ PVOID Buffer)
|
|
{
|
|
if (!Buffer)
|
|
return;
|
|
|
|
HeapFree(GetProcessHeap(), 0, Buffer);
|
|
}
|