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//! Simple functions to add and delete IP addresses.
use crate::{Connection, Error, Result};
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
use futures::{future, TryStream, TryStreamExt};
use netlink_packet_route::{
address::Nla, AddressMessage, AF_INET, AF_INET6, RT_SCOPE_LINK, RT_SCOPE_UNIVERSE,
};
impl Connection {
/// Flushes all addresses of an interface.
pub async fn address_flush(&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 addrs: Vec<AddressMessage> = self
.handle()
.address()
.get()
.set_link_index_filter(id)
.execute()
.try_collect()
.await?;
for addr in addrs {
self.handle().address().del(addr).execute().await?;
}
Ok(())
}
/// Flushes the IPv4 addresses of an interface.
pub async fn address_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 addrs: Vec<AddressMessage> = self
.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 {
self.handle().address().del(addr).execute().await?;
}
Ok(())
}
/// Flushes the IPv6 addresses of an interface.
pub async fn address_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 addrs: Vec<AddressMessage> = self
.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 {
self.handle().address().del(addr).execute().await?;
}
Ok(())
}
/// Flushes all global unicast IPv6 addresses from all interfaces.
pub async fn address_flush6_global(&self) -> Result<()> {
let addrs: Vec<AddressMessage> = self
.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 {
self.handle().address().del(addr).execute().await?;
}
Ok(())
}
/// Adds an IP address to an interface.
pub async fn address_add(&self, link: String, addr: IpAddr, prefix_len: u8) -> 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;
self.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 address_add_link_local(
&self,
link: String,
addr: IpAddr,
prefix_len: u8,
) -> 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 mut req = self.handle().address().add(id, addr, prefix_len);
req.message_mut().header.scope = RT_SCOPE_LINK;
req.execute().await?;
Ok(())
}
/// Returns an iterator over the IP addresses of an interface.
pub async fn address_get(
&self,
link: String,
) -> Result<impl TryStream<Ok = IpAddr, Error = Error>> {
let link = self
.handle()
.link()
.get()
.match_name(link.clone())
.execute()
.try_next()
.await?
.ok_or(Error::LinkNotFound(link))?;
Ok(self
.handle()
.address()
.get()
.set_link_index_filter(link.header.index)
.execute()
.err_into::<Error>()
.try_filter_map(|msg| {
future::ready(Ok(if let Some(Nla::Address(bytes)) = msg.nlas.first() {
match msg.header.family as u16 {
AF_INET => {
let octets: [u8; 4] = (*bytes)
.clone()
.try_into()
.expect("nla does not match ipv4 address length");
let ip = IpAddr::from(Ipv4Addr::from(octets));
Some(ip)
}
AF_INET6 => {
let octets: [u8; 16] = (*bytes)
.clone()
.try_into()
.expect("nla does not match ipv6 address length");
let ip = IpAddr::from(Ipv6Addr::from(octets));
Some(ip)
}
_ => None,
}
} else {
None
}))
}))
}
}
|
