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// SPDX-License-Identifier: MIT
#![cfg(feature = "tokio_socket")]
use futures::stream::TryStreamExt;
use netlink_packet_route::{
link::{LinkAttribute, LinkExtentMask},
AddressFamily,
};
use rtnetlink::{new_connection, Error, Handle};
#[cfg(target_os = "freebsd")]
fn main() -> () {}
#[cfg(not(target_os = "freebsd"))]
#[tokio::main]
async fn main() -> Result<(), ()> {
env_logger::init();
let (connection, handle, _) = new_connection().unwrap();
tokio::spawn(connection);
// Fetch a link by its index
let index = 1;
println!("*** retrieving link with index {index} ***");
if let Err(e) = get_link_by_index(handle.clone(), index).await {
eprintln!("{e}");
}
// Fetch a link by its name
let name = "lo";
println!("*** retrieving link named \"{name}\" ***");
if let Err(e) = get_link_by_name(handle.clone(), name.to_string()).await {
eprintln!("{e}");
}
// Dump all the links and print their index and name
println!("*** dumping links ***");
if let Err(e) = dump_links(handle.clone()).await {
eprintln!("{e}");
}
// Dump all the bridge vlan information
if let Err(e) = dump_bridge_filter_info(handle.clone()).await {
eprintln!("{e}");
}
Ok(())
}
async fn get_link_by_index(handle: Handle, index: u32) -> Result<(), Error> {
let mut links = handle.link().get().match_index(index).execute();
let msg = if let Some(msg) = links.try_next().await? {
msg
} else {
eprintln!("no link with index {index} found");
return Ok(());
};
// We should have received only one message
assert!(links.try_next().await?.is_none());
for nla in msg.attributes.into_iter() {
if let LinkAttribute::IfName(name) = nla {
println!("found link with index {index} (name = {name})");
return Ok(());
}
}
eprintln!(
"found link with index {index}, but this link does not have a name"
);
Ok(())
}
async fn get_link_by_name(handle: Handle, name: String) -> Result<(), Error> {
let mut links = handle.link().get().match_name(name.clone()).execute();
if (links.try_next().await?).is_some() {
println!("found link {name}");
// We should only have one link with that name
assert!(links.try_next().await?.is_none());
} else {
println!("no link link {name} found");
}
Ok(())
}
async fn dump_links(handle: Handle) -> Result<(), Error> {
let mut links = handle.link().get().execute();
'outer: while let Some(msg) = links.try_next().await? {
for nla in msg.attributes.into_iter() {
if let LinkAttribute::IfName(name) = nla {
println!("found link {} ({})", msg.header.index, name);
continue 'outer;
}
}
eprintln!("found link {}, but the link has no name", msg.header.index);
}
Ok(())
}
#[cfg(not(target_os = "freebsd"))]
async fn dump_bridge_filter_info(handle: Handle) -> Result<(), Error> {
let mut links = handle
.link()
.get()
.set_filter_mask(AddressFamily::Bridge, vec![LinkExtentMask::Brvlan])
.execute();
'outer: while let Some(msg) = links.try_next().await? {
for nla in msg.attributes.into_iter() {
if let LinkAttribute::AfSpecBridge(data) = nla {
println!(
"found interface {} with AfSpecBridge data {:?})",
msg.header.index, data
);
continue 'outer;
}
}
}
Ok(())
}
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