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use crate::{Error, Result};
use std::net::{Ipv4Addr, Ipv6Addr};
use futures::{future, TryStreamExt};
use netlink_packet_route::{RouteMessage, RT_SCOPE_LINK};
use rtnetlink::IpVersion;
/// Flushes all IPv4 routes from an interface.
pub async fn flush4(link: String) -> 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;
let routes: Vec<RouteMessage> = handle
.route()
.get(IpVersion::V4)
.execute()
.try_filter(|route| {
future::ready(if let Some(ifi) = route.output_interface() {
ifi == id
} else {
false
})
})
.try_collect()
.await?;
for route in routes {
handle.route().del(route).execute().await?;
}
Ok(())
}
/// Flushes all IPv6 routes from an interface.
pub async fn flush6(link: String) -> 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;
let routes: Vec<RouteMessage> = handle
.route()
.get(IpVersion::V6)
.execute()
.try_filter(|route| {
future::ready(if let Some(ifi) = route.output_interface() {
ifi == id
} else {
false
})
})
.try_collect()
.await?;
for route in routes {
handle.route().del(route).execute().await?;
}
Ok(())
}
/// Adds a simple IPv4 route with an optional gateway.
pub async fn add4(
dst: Ipv4Addr,
prefix_len: u8,
rtr: Option<Ipv4Addr>,
link: String,
) -> 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;
let mut add = handle
.route()
.add()
.v4()
.destination_prefix(dst, prefix_len)
.output_interface(id);
if let Some(rtr) = rtr {
add = add.gateway(rtr);
} else {
add = add.scope(RT_SCOPE_LINK);
}
add.execute().await?;
Ok(())
}
/// Adds a simple IPv6 route with an optional gateway.
pub async fn add6(
dst: Ipv6Addr,
prefix_len: u8,
rtr: Option<Ipv6Addr>,
link: String,
) -> 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;
let mut add = handle
.route()
.add()
.v6()
.destination_prefix(dst, prefix_len)
.output_interface(id);
if let Some(rtr) = rtr {
add = add.gateway(rtr);
} else {
add = add.scope(RT_SCOPE_LINK);
}
add.execute().await?;
Ok(())
}
|
