1 files changed, 55 insertions, 0 deletions
diff --git a/vendor/rustix/src/backend/libc/net/netdevice.rs b/vendor/rustix/src/backend/libc/net/netdevice.rs
new file mode 100644
index 00000000..887f768d
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/netdevice.rs
@@ -0,0 +1,55 @@
+//! Wrappers for netdevice ioctls.
+
+#![allow(unsafe_code)]
+
+#[cfg(feature = "alloc")]
+use crate::alloc::string::String;
+use crate::backend::c;
+use crate::backend::io::syscalls::ioctl;
+use crate::fd::BorrowedFd;
+use crate::io;
+#[cfg(feature = "alloc")]
+use c::SIOCGIFNAME;
+use c::{__c_anonymous_ifr_ifru, c_char, ifreq, IFNAMSIZ, SIOCGIFINDEX};
+
+pub(crate) fn name_to_index(fd: BorrowedFd<'_>, if_name: &str) -> io::Result<u32> {
+    let if_name_bytes = if_name.as_bytes();
+    if if_name_bytes.len() >= IFNAMSIZ as usize {
+        return Err(io::Errno::NODEV);
+    }
+
+    let mut ifreq = ifreq {
+        ifr_name: [0; 16],
+        ifr_ifru: __c_anonymous_ifr_ifru { ifru_ifindex: 0 },
+    };
+
+    let mut if_name_c_char_iter = if_name_bytes.iter().map(|byte| *byte as c_char);
+    ifreq.ifr_name[..if_name_bytes.len()].fill_with(|| if_name_c_char_iter.next().unwrap());
+
+    unsafe { ioctl(fd, SIOCGIFINDEX as _, &mut ifreq as *mut ifreq as _) }?;
+    let index = unsafe { ifreq.ifr_ifru.ifru_ifindex };
+    Ok(index as u32)
+}
+
+#[cfg(feature = "alloc")]
+pub(crate) fn index_to_name(fd: BorrowedFd<'_>, index: u32) -> io::Result<String> {
+    let mut ifreq = ifreq {
+        ifr_name: [0; 16],
+        ifr_ifru: __c_anonymous_ifr_ifru {
+            ifru_ifindex: index as _,
+        },
+    };
+
+    unsafe { ioctl(fd, SIOCGIFNAME as _, &mut ifreq as *mut ifreq as _) }?;
+
+    if let Some(nul_byte) = ifreq.ifr_name.iter().position(|char| *char == 0) {
+        let name: String = ifreq.ifr_name[..nul_byte]
+            .iter()
+            .map(|v| *v as u8 as char)
+            .collect();
+
+        Ok(name)
+    } else {
+        Err(io::Errno::INVAL)
+    }
+}