socketcan 3.5.0

Linux SocketCAN library. Send and receive CAN frames via CANbus on Linux.
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// socketcan/src/enumerate.rs
//
// Implements support for enumerating available SocketCAN network interfaces.
//
// This file is part of the Rust 'socketcan-rs' library.
//
// Licensed under the MIT license:
//   <LICENSE or http://opensource.org/licenses/MIT>
// This file may not be copied, modified, or distributed except according
// to those terms.

//! SocketCAN interface enumeration.
//!
//! This module provides functionality to enumerate available SocketCAN network
//! interfaces.
//!

use crate::Result;

use libc::ARPHRD_CAN;
use libudev::{Context, Enumerator};

/// Scans the system for available SocketCAN network interfaces and returns a
/// list of them.
pub fn available_interfaces() -> Result<Vec<String>> {
    let mut interfaces = Vec::new();
    if let Ok(context) = Context::new() {
        let mut enumerator = Enumerator::new(&context)?;
        enumerator.match_subsystem("net")?;
        enumerator.match_attribute("type", ARPHRD_CAN.to_string())?;
        let devices = enumerator.scan_devices()?;
        for d in devices {
            if let Some(interface) = d.property_value("INTERFACE") {
                if let Some(interface) = interface.to_str() {
                    interfaces.push(String::from(interface));
                }
            }
        }
    }
    Ok(interfaces)
}