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net_gen: replace net_gen with libc

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The libc crate provides all functionality provided by the net_gen crate.
Removing the net_gen crate reduces the maintenance burden.

The switch to libc required some fixes, most notably the switch from a
`Vec<u8>` to a `CString` for the `net_util::Tap.if_name` field.

On-behalf-of: SAP julian.schindel@sap.com
Signed-off-by: Julian Schindel <julian.schindel@cyberus-technology.de>
This commit is contained in:
Julian Schindel
2026-03-13 15:11:14 +01:00
committed by Rob Bradford
parent 3a56f20ee1
commit 2b28c5b15a
17 changed files with 140 additions and 2215 deletions
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6
net_util/src/open_tap.rs
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@@ -48,11 +48,11 @@ fn check_mq_support(if_name: &Option<&str>, queue_pairs: usize) -> Result<()> {
return Ok(());
}
let tun_flags_str = fs::read_to_string(path).map_err(Error::ReadSysfsTunFlags)?;
let tun_flags = u32::from_str_radix(tun_flags_str.trim().trim_start_matches("0x"), 16)
let tun_flags = i32::from_str_radix(tun_flags_str.trim().trim_start_matches("0x"), 16)
.map_err(Error::ConvertHexStringToInt)?;
if (tun_flags & net_gen::IFF_MULTI_QUEUE != 0) && !mq {
if (tun_flags & libc::IFF_MULTI_QUEUE != 0) && !mq {
return Err(Error::MultiQueueNoDeviceSupport);
} else if (tun_flags & net_gen::IFF_MULTI_QUEUE == 0) && mq {
} else if (tun_flags & libc::IFF_MULTI_QUEUE == 0) && mq {
return Err(Error::MultiQueueNoTapSupport);
}
}