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//! Simple functions to add and delete IP addresses.
use crate::{Error, Result};
use std::net::IpAddr;
use futures::{future, TryStreamExt};
use netlink_packet_route::{AddressMessage, AF_INET, AF_INET6, RT_SCOPE_LINK, RT_SCOPE_UNIVERSE};
/// Flushes all addresses of an interface.
pub async fn flush(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 addrs: Vec<AddressMessage> = handle
.address()
.get()
.set_link_index_filter(id)
.execute()
.try_collect()
.await?;
for addr in addrs {
handle.address().del(addr).execute().await?;
}
Ok(())
}
/// Flushes the IPv4 addresses of 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 addrs: Vec<AddressMessage> = handle
.address()
.get()
.set_link_index_filter(id)
.execute()
.try_filter(|addr| future::ready(addr.header.family == AF_INET as u8))
.try_collect()
.await?;
for addr in addrs {
handle.address().del(addr).execute().await?;
}
Ok(())
}
/// Flushes the IPv6 addresses of 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 addrs: Vec<AddressMessage> = handle
.address()
.get()
.set_link_index_filter(id)
.execute()
.try_filter(|addr| future::ready(addr.header.family == AF_INET6 as u8))
.try_collect()
.await?;
for addr in addrs {
handle.address().del(addr).execute().await?;
}
Ok(())
}
/// Flushes all global unicast IPv6 addresses from all interfaces.
pub async fn flush6_global() -> Result<()> {
let (conn, handle, _) = rtnetlink::new_connection()?;
tokio::spawn(conn);
let addrs: Vec<AddressMessage> = handle
.address()
.get()
.execute()
.try_filter(|addr| {
future::ready(
addr.header.family == AF_INET6 as u8 && addr.header.scope == RT_SCOPE_UNIVERSE,
)
})
.try_collect()
.await?;
for addr in addrs {
handle.address().del(addr).execute().await?;
}
Ok(())
}
/// Adds an IP address to an interface.
pub async fn add(link: String, addr: IpAddr, prefix_len: u8) -> 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.address().add(id, addr, prefix_len).execute().await?;
Ok(())
}
/// Adds a link-scope IP address to an interface.
/// This is especially useful with IPv6.
pub async fn add_link_local(link: String, addr: IpAddr, prefix_len: u8) -> 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 req = handle.address().add(id, addr, prefix_len);
req.message_mut().header.scope = RT_SCOPE_LINK;
req.execute().await?;
Ok(())
}
|
