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//! Simple functions to add and delete routes.
use crate::{Connection, Error, Result};
use std::net::{Ipv4Addr, Ipv6Addr};
use futures::{future, TryStreamExt};
use netlink_packet_route::route::{RouteAttribute, RouteMessage, RouteScope};
use rtnetlink::IpVersion;
/// An IPv4 route configuration.
#[derive(Clone, Debug)]
pub struct Route4 {
/// The destination prefix this route applies to.
pub dst: Ipv4Addr,
/// The length of the destination prefix this route applies to.
pub prefix_len: u8,
/// The (optional) router to send packets to.
pub rtr: Option<Ipv4Addr>,
/// Whether to apply the link scope to this route.
pub on_link: bool,
/// The table this route belongs to. Defaults to `main`.
pub table: Option<u32>,
/// The metric (priority) of this route. `None` causes the kernel default
/// to be used.
pub metric: Option<u32>,
/// The network interface to send packets over.
pub link: String,
}
/// An IPv6 route configuration.
#[derive(Clone, Debug)]
pub struct Route6 {
/// The destination prefix this route applies to.
pub dst: Ipv6Addr,
/// The length of the destination prefix this route applies to.
pub prefix_len: u8,
/// The (optional) router to send packets to.
pub rtr: Option<Ipv6Addr>,
/// Whether to apply the link scope to this route.
pub on_link: bool,
/// The table this route belongs to. Defaults to `main`.
pub table: Option<u32>,
/// The metric (priority) of this route. `None` causes the kernel default
/// to be used.
pub metric: Option<u32>,
/// The network interface to send packets over.
pub link: String,
}
impl Connection {
/// Flushes all IPv4 routes from an interface.
pub async fn route_flush4(&self, link: String) -> Result<()> {
let link = self
.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> = self
.handle()
.route()
.get(IpVersion::V4)
.execute()
.try_filter(|route| {
future::ready(
if let Some(ifi) = route.attributes.iter().find_map(|attr| {
if let RouteAttribute::Oif(oif) = *attr {
Some(oif)
} else {
None
}
}) {
ifi == id
} else {
false
},
)
})
.try_collect()
.await?;
for route in routes {
self.handle().route().del(route).execute().await?;
}
Ok(())
}
/// Flushes all IPv6 routes from an interface.
pub async fn route_flush6(&self, link: String) -> Result<()> {
let link = self
.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> = self
.handle()
.route()
.get(IpVersion::V6)
.execute()
.try_filter(|route| {
future::ready(
if let Some(ifi) = route.attributes.iter().find_map(|attr| {
if let RouteAttribute::Oif(oif) = *attr {
Some(oif)
} else {
None
}
}) {
ifi == id
} else {
false
},
)
})
.try_collect()
.await?;
for route in routes {
self.handle().route().del(route).execute().await?;
}
Ok(())
}
/// Flushes all routes from an interface.
pub async fn route_flush(&self, link: String) -> Result<()> {
self.route_flush4(link.clone()).await?;
self.route_flush6(link).await?;
Ok(())
}
/// Adds a simple IPv4 route with an optional gateway.
pub async fn route_add4(&self, r: Route4) -> Result<()> {
let link = self
.handle()
.link()
.get()
.match_name(r.link.clone())
.execute()
.try_next()
.await?
.ok_or(Error::LinkNotFound(r.link))?;
let id = link.header.index;
let mut add = self
.handle()
.route()
.add()
.v4()
.destination_prefix(r.dst, r.prefix_len)
.output_interface(id);
if let Some(rtr) = r.rtr {
add = add.gateway(rtr);
}
if r.on_link {
add = add.scope(RouteScope::Link);
}
if let Some(table) = r.table {
add = add.table_id(table);
}
if let Some(metric) = r.metric {
add = add.priority(metric);
}
add.execute().await?;
Ok(())
}
/// Adds a simple IPv6 route with an optional gateway.
pub async fn route_add6(&self, r: Route6) -> Result<()> {
let link = self
.handle()
.link()
.get()
.match_name(r.link.clone())
.execute()
.try_next()
.await?
.ok_or(Error::LinkNotFound(r.link))?;
let id = link.header.index;
let mut add = self
.handle()
.route()
.add()
.v6()
.destination_prefix(r.dst, r.prefix_len)
.output_interface(id);
if let Some(rtr) = r.rtr {
add = add.gateway(rtr);
}
if r.on_link {
add = add.scope(RouteScope::Link);
}
if let Some(table) = r.table {
add = add.table_id(table);
}
if let Some(metric) = r.metric {
add = add.priority(metric);
}
add.execute().await?;
Ok(())
}
}
|
