1 files changed, 107 insertions, 0 deletions
diff --git a/vendor/rustix/src/net/netdevice.rs b/vendor/rustix/src/net/netdevice.rs
new file mode 100644
index 00000000..1ddd918e
--- /dev/null
+++ b/vendor/rustix/src/net/netdevice.rs
@@ -0,0 +1,107 @@
+//! Low-level Linux network device access
+//!
+//! The methods in this module take a socket's file descriptor to communicate
+//! with the kernel in their ioctl call:
+//!  - glibc uses an `AF_UNIX`, `AF_INET`, or `AF_INET6` socket. The address
+//!    family itself does not matter and glibc tries the next address family if
+//!    socket creation with one fails.
+//!  - Android (bionic) uses an `AF_INET` socket.
+//!  - Both create the socket with `SOCK_DGRAM|SOCK_CLOEXEC` type/flag.
+//!  - The [manual pages] specify that the ioctl calls “can be used on any
+//!    socket's file descriptor regardless of the family or type”.
+//!
+//! # References
+//!  - [Linux]
+//!
+//! [manual pages]: https://man7.org/linux/man-pages/man7/netdevice.7.html
+//! [Linux]: https://man7.org/linux/man-pages/man7/netdevice.7.html
+
+use crate::fd::AsFd;
+use crate::io;
+#[cfg(feature = "alloc")]
+use alloc::string::String;
+
+/// `ioctl(fd, SIOCGIFINDEX, ifreq)`—Returns the interface index for a given
+/// name.
+///
+/// See the [module-level documentation] for information about `fd` usage.
+///
+/// # References
+///  - [Linux]
+///
+/// [module-level documentation]: self
+/// [Linux]: https://man7.org/linux/man-pages/man7/netdevice.7.html
+#[inline]
+#[doc(alias = "SIOCGIFINDEX")]
+pub fn name_to_index<Fd: AsFd>(fd: Fd, if_name: &str) -> io::Result<u32> {
+    crate::backend::net::netdevice::name_to_index(fd.as_fd(), if_name)
+}
+
+/// `ioctl(fd, SIOCGIFNAME, ifreq)`—Returns the interface name for a given
+/// index.
+///
+/// See the [module-level documentation] for information about `fd` usage.
+///
+/// # References
+///  - [Linux]
+///
+/// [module-level documentation]: self
+/// [Linux]: https://man7.org/linux/man-pages/man7/netdevice.7.html
+#[inline]
+#[doc(alias = "SIOCGIFNAME")]
+#[cfg(feature = "alloc")]
+#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
+pub fn index_to_name<Fd: AsFd>(fd: Fd, index: u32) -> io::Result<String> {
+    crate::backend::net::netdevice::index_to_name(fd.as_fd(), index)
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::backend::net::netdevice::{index_to_name, name_to_index};
+    use crate::fd::AsFd;
+    use crate::net::{AddressFamily, SocketFlags, SocketType};
+
+    #[test]
+    fn test_name_to_index() {
+        let fd = crate::net::socket_with(
+            AddressFamily::INET,
+            SocketType::DGRAM,
+            SocketFlags::CLOEXEC,
+            None,
+        )
+        .unwrap();
+
+        let loopback_index = std::fs::read_to_string("/sys/class/net/lo/ifindex")
+            .unwrap()
+            .as_str()
+            .split_at(1)
+            .0
+            .parse::<u32>()
+            .unwrap();
+        assert_eq!(Ok(loopback_index), name_to_index(fd.as_fd(), "lo"));
+    }
+
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test_index_to_name() {
+        let fd = crate::net::socket_with(
+            AddressFamily::INET,
+            SocketType::DGRAM,
+            SocketFlags::CLOEXEC,
+            None,
+        )
+        .unwrap();
+
+        let loopback_index = std::fs::read_to_string("/sys/class/net/lo/ifindex")
+            .unwrap()
+            .as_str()
+            .split_at(1)
+            .0
+            .parse::<u32>()
+            .unwrap();
+        assert_eq!(
+            Ok("lo".to_owned()),
+            index_to_name(fd.as_fd(), loopback_index)
+        );
+    }
+}