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net_util: Change libc::getrandom to getrandom::getrandom

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libc::getrandom need to be called inside unsafe and it is not
cross-platform friendly.
Change it to getrandom::getrandom that is safe and cross-platform
friendly.

Signed-off-by: Hui Zhu <teawater@antfin.com>
This commit is contained in:
Hui Zhu
2021-09-15 21:50:03 +08:00
committed by Sebastien Boeuf
parent c741c01cc0
commit c313bcbfd4
3 changed files with 8 additions and 15 deletions
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21
net_util/src/mac.rs
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@@ -82,21 +82,12 @@ impl MacAddr {
pub fn local_random() -> MacAddr {
// Generate a fully random MAC
let mut random_bytes = [0u8; MAC_ADDR_LEN];
unsafe {
// Man page says this function will not be interrupted by a signal
// for requests less than 256 bytes
if libc::getrandom(
random_bytes.as_mut_ptr() as *mut _ as *mut libc::c_void,
MAC_ADDR_LEN,
0,
) < 0
{
error!(
"Error populating MAC address with random data: {}",
std::io::Error::last_os_error()
)
}
};
if let Err(e) = getrandom::getrandom(&mut random_bytes) {
error!(
"Error populating MAC address with random data: {}",
e.to_string()
);
}
// Set the first byte to make the OUI a locally administered OUI
random_bytes[0] = 0x2e;