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// Take a look at the license at the top of the repository in the LICENSE file.
#[cfg(feature = "disk")]
use windows::Win32::Storage::FileSystem::{
CreateFileW, FILE_ACCESS_RIGHTS, FILE_SHARE_READ, FILE_SHARE_WRITE, OPEN_EXISTING,
};
#[cfg(any(feature = "user", feature = "system"))]
pub(crate) unsafe fn to_utf8_str(p: windows::core::PWSTR) -> String {
if p.is_null() {
return String::new();
}
unsafe {
p.to_string().unwrap_or_else(|_e| {
sysinfo_debug!("Failed to convert to UTF-16 string: {}", _e);
String::new()
})
}
}
cfg_if! {
if #[cfg(any(feature = "disk", feature = "system"))] {
use windows::Win32::Foundation::{CloseHandle, HANDLE};
use std::ops::Deref;
pub(crate) struct HandleWrapper(pub(crate) HANDLE);
impl HandleWrapper {
#[cfg(feature = "system")]
pub(crate) fn new(handle: HANDLE) -> Option<Self> {
if handle.is_invalid() {
None
} else {
Some(Self(handle))
}
}
#[cfg(feature = "disk")]
pub(crate) unsafe fn new_from_file(
drive_name: &[u16],
open_rights: FILE_ACCESS_RIGHTS,
) -> Option<Self> {
let lpfilename = windows::core::PCWSTR::from_raw(drive_name.as_ptr());
let handle = unsafe { CreateFileW(
lpfilename,
open_rights.0,
FILE_SHARE_READ | FILE_SHARE_WRITE,
None,
OPEN_EXISTING,
Default::default(),
Some(HANDLE::default()),
) }
.ok()?;
if handle.is_invalid() {
sysinfo_debug!(
"Expected handle to {:?} to be valid",
String::from_utf16_lossy(drive_name)
);
None
} else {
Some(Self(handle))
}
}
}
impl Deref for HandleWrapper {
type Target = HANDLE;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl Drop for HandleWrapper {
fn drop(&mut self) {
let _err = unsafe { CloseHandle(self.0) };
}
}
}
}
cfg_if! {
if #[cfg(feature = "system")] {
use windows::Win32::System::SystemInformation::{FIRMWARE_TABLE_PROVIDER, GetSystemFirmwareTable};
use super::ffi::SMBIOSType;
// Get the SMBIOS table using the WinAPI.
pub(crate) fn get_smbios_table() -> Option<Vec<u8>> {
const PROVIDER: FIRMWARE_TABLE_PROVIDER = FIRMWARE_TABLE_PROVIDER(u32::from_be_bytes(*b"RSMB"));
let size = unsafe { GetSystemFirmwareTable(PROVIDER, 0, None) };
if size == 0 {
return None;
}
let mut buffer = vec![0u8; size as usize];
let res = unsafe { GetSystemFirmwareTable(PROVIDER, 0, Some(&mut buffer)) };
if res == 0 {
return None;
}
Some(buffer)
}
// Parses the SMBIOS table to get mainboard information (type number).
// Returns a part of struct with its associated strings.
// The parsing format is described here: https://wiki.osdev.org/System_Management_BIOS
// and here: https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.6.0.pdf
pub(crate) fn parse_smbios<T: SMBIOSType>(table: &[u8], number: u8) -> Option<(T, Vec<&str>)> {
// Skip SMBIOS types until type `number` is reached.
// All indexes provided by the structure start at 1.
// If the index is 0, the value has not been filled in.
// At index i:
// table[i] is the current SMBIOS type.
// table[i + 1] is the length of the current SMBIOS table header
// Strings section starts immediately after the SMBIOS header,
// and is a list of null-terminated strings, terminated with two \0.
let mut found = false;
let mut i = 0;
while i + 1 < table.len() {
if table[i] == number {
found = true;
break;
}
i += table[i + 1] as usize;
// Skip strings table (terminated itself by \0)
while i < table.len() {
if table[i] == 0 && table[i + 1] == 0 {
i += 2;
break;
}
i += 1;
}
}
if !found {
return None;
}
let data = table.get(i..)?;
if data.len() < std::mem::size_of::<T>() {
return None;
}
// Safety: The prior bounds check and `T: SMBIOSType` trait bound guarantees that
// reading from `data` produces a valid `T`.
let info: T = unsafe { std::ptr::read_unaligned(data.as_ptr() as *const _) };
// As said in the SMBIOS 3 standard: https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.6.0.pdf,
// the strings are necessarily in UTF-8. But sometimes virtual machines may return non-compliant data.
let values = table.get((i + info.length() as usize)..)
.unwrap_or_default()
.split(|&b| b == 0)
.filter_map(|s| std::str::from_utf8(s).ok())
.take_while(|s| !s.is_empty())
.collect();
Some((info, values))
}
}
}