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// SPDX-License-Identifier: MIT
use netlink_packet_core::{
NetlinkHeader, NetlinkMessage, NetlinkPayload, NLM_F_DUMP, NLM_F_REQUEST,
};
use netlink_packet_route::{
neighbour_table::NeighbourTableMessage, RouteNetlinkMessage,
};
use netlink_sys::{protocols::NETLINK_ROUTE, Socket, SocketAddr};
fn main() {
let mut socket = Socket::new(NETLINK_ROUTE).unwrap();
let _port_number = socket.bind_auto().unwrap().port_number();
socket.connect(&SocketAddr::new(0, 0)).unwrap();
let mut nl_hdr = NetlinkHeader::default();
nl_hdr.flags = NLM_F_DUMP | NLM_F_REQUEST;
let mut req = NetlinkMessage::new(
nl_hdr,
NetlinkPayload::from(RouteNetlinkMessage::GetNeighbourTable(
NeighbourTableMessage::default(),
)),
);
// IMPORTANT: call `finalize()` to automatically set the
// `message_type` and `length` fields to the appropriate values in
// the netlink header.
req.finalize();
let mut buf = vec![0; req.header.length as usize];
req.serialize(&mut buf[..]);
println!(">>> {req:?}");
socket.send(&buf[..], 0).unwrap();
let mut receive_buffer = vec![0; 4096];
let mut offset = 0;
'outer: loop {
let size = socket.recv(&mut &mut receive_buffer[..], 0).unwrap();
loop {
let bytes = &receive_buffer[offset..];
// Parse the message
let msg: NetlinkMessage<RouteNetlinkMessage> =
NetlinkMessage::deserialize(bytes).unwrap();
match msg.payload {
NetlinkPayload::Done(_) => break 'outer,
NetlinkPayload::InnerMessage(
RouteNetlinkMessage::NewNeighbourTable(entry),
) => {
println!("HAHA {:?}", entry);
}
NetlinkPayload::Error(err) => {
eprintln!("Received a netlink error message: {err:?}");
return;
}
_ => {}
}
offset += msg.header.length as usize;
if offset == size || msg.header.length == 0 {
offset = 0;
break;
}
}
}
}
|
