The Broadcast Manager protocol provides a command based configuration interface to filter and send (e.g. cyclic) CAN messages in kernel space. Filtering messages in kernel space may significantly reduce the load in an application.
A BCM socket is not intended for sending individual CAN frames. To send invidiual frames use the tokio-socketcan crate.
This crate would not have been possible without the socketcan crate.
use std::time;
use futures_util::stream::StreamExt;
use tokio_socketcan_bcm::{BCMSocket, Id, StandardId};
#[tokio::main]
async fn main() {
let socket = BCMSocket::open_nb("vcan0").unwrap();
let ival = time::Duration::from_millis(0);
// create a stream of messages that filters by the can frame id 0x123
let id = Id::Standard(StandardId::new(0x123).unwrap());
let mut can_frame_stream = socket
.filter(id, ival, ival)
.unwrap();
while let Some(frame) = can_frame_stream.next().await {
println!("Frame {:?}", frame);
()
}
}