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//! Simple functions to add, monitor and configure network interfaces.
use crate::{Error, Result};
use std::time::Duration;
use tokio::time::sleep;
use futures::TryStreamExt;
use netlink_packet_route::rtnl::IFF_UP;
/// Brings an interface up or down.
#[cfg(feature = "link")]
pub async fn set(link: String, state: bool) -> Result<()> {
let (conn, handle, _) = rtnetlink::new_connection()?;
tokio::spawn(conn);
let link = handle
.link()
.get()
.match_name(link.clone())
.execute()
.try_next()
.await?
.ok_or(Error::LinkNotFound(link))?;
let id = link.header.index;
match state {
true => handle.link().set(id).up(),
false => handle.link().set(id).down(),
}
.execute()
.await?;
Ok(())
}
/// Reports whether an interface is up.
///
/// # Errors
///
/// This function fails if the interface doesn't exist
/// or if any other `rtnetlink` error occurs.
pub async fn is_up(link: String) -> Result<bool> {
let (conn, handle, _) = rtnetlink::new_connection()?;
tokio::spawn(conn);
let link = handle
.link()
.get()
.match_name(link.clone())
.execute()
.try_next()
.await?
.ok_or(Error::LinkNotFound(link))?;
let is_up = link.header.flags & IFF_UP == IFF_UP;
Ok(is_up)
}
/// Sets the MTU of an interface.
#[cfg(feature = "link")]
pub async fn set_mtu(link: String, mtu: u32) -> Result<()> {
let (conn, handle, _) = rtnetlink::new_connection()?;
tokio::spawn(conn);
let link = handle
.link()
.get()
.match_name(link.clone())
.execute()
.try_next()
.await?
.ok_or(Error::LinkNotFound(link))?;
let id = link.header.index;
handle.link().set(id).mtu(mtu).execute().await?;
Ok(())
}
/// Creates a VLAN interface on top of a parent interface.
///
/// # Arguments
///
/// * `link` - The name of the VLAN interface to be created.
/// * `parent` - The name of the parent interface for the actual traffic.
/// * `vlan_id` - The VLAN ID for tagging.
#[cfg(feature = "link")]
pub async fn add_vlan(link: String, parent: String, vlan_id: u16) -> Result<()> {
let (conn, handle, _) = rtnetlink::new_connection()?;
tokio::spawn(conn);
let parent = handle
.link()
.get()
.match_name(parent.clone())
.execute()
.try_next()
.await?
.ok_or(Error::LinkNotFound(parent))?;
let parent_id = parent.header.index;
handle
.link()
.add()
.vlan(link, parent_id, vlan_id)
.execute()
.await?;
Ok(())
}
/// Waits for an interface to come up, including waiting for its creation.
pub async fn wait_up(link: String) -> Result<()> {
while !exists(link.clone()).await? || !is_up(link.clone()).await? {
sleep(Duration::from_millis(200)).await;
}
Ok(())
}
/// Reports whether an interface exists.
pub async fn exists(link: String) -> Result<bool> {
let (conn, handle, _) = rtnetlink::new_connection()?;
tokio::spawn(conn);
let exists = handle
.link()
.get()
.match_name(link)
.execute()
.try_next()
.await
.is_ok();
Ok(exists)
}
/// Waits until an interface is created.
pub async fn wait_exists(link: String) -> Result<()> {
while !exists(link.clone()).await? {
sleep(Duration::from_millis(200)).await;
}
Ok(())
}
|
