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// SPDX-License-Identifier: MIT
#![cfg(feature = "tokio_socket")]
use futures::stream::TryStreamExt;
use macaddr::MacAddr;
use rtnetlink::{new_connection, Error, Handle};
use std::{env, str::FromStr};
use netlink_packet_route::link::LinkAttribute;
#[tokio::main]
async fn main() -> Result<(), String> {
let args: Vec<String> = env::args().collect();
if args.len() != 2 && args.len() != 3 {
usage();
return Ok(());
}
let link_name = &args[1];
let mac: Option<Vec<u8>> = if args.len() == 3 {
let mac_address_arg = (&args[2]).to_string();
let mac_address = MacAddr::from_str(mac_address_arg.as_str())
.map_err(|e| format!("{e}"))?;
Some(mac_address.as_bytes().into())
} else {
None
};
let (connection, handle, _) = new_connection().unwrap();
tokio::spawn(connection);
create_macvlan(handle, link_name.to_string(), mac)
.await
.map_err(|e| format!("{e}"))
}
async fn create_macvlan(
handle: Handle,
link_name: String,
mac_address: Option<Vec<u8>>,
) -> Result<(), Error> {
let mut links = handle.link().get().match_name(link_name.clone()).execute();
if let Some(link) = links.try_next().await? {
let mut request = handle.link().add().macvlan(
"test_macvlan".into(),
link.header.index,
4u32, // bridge mode
);
if let Some(mac) = mac_address {
request
.message_mut()
.attributes
.push(LinkAttribute::Address(mac));
}
request.execute().await?
} else {
println!("no link {link_name} found");
}
Ok(())
}
fn usage() {
eprintln!(
"usage:
cargo run --example create_macvlan -- <link name> [mac address]
Note that you need to run this program as root. Instead of running cargo as root,
build the example normally:
cargo build --example create_macvlan
Then find the binary in the target directory:
cd target/debug/examples ; sudo ./create_macvlan <link_name> [mac address]"
);
}
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