Function _check_ethernet_carrier

wifi_interfaces.py:252–281

Check if an Ethernet interface has a physical connection (carrier).

(interface_name: str)

def _check_ethernet_carrier(interface_name: str) -> bool:
    """Check if an Ethernet interface has a physical connection (carrier)."""
    try:
        # Check carrier file in sysfs
        result = subprocess.run(
            ['cat', f'/sys/class/net/{interface_name}/carrier'],
            capture_output=True,
            text=True,
            timeout=2
        )
        if result.returncode == 0:
            carrier = result.stdout.strip()
            return carrier == '1'
    except Exception as exc:
        logger.debug(f"Unable to check carrier for {interface_name}: {exc}")

    # Fallback: check if interface is UP and has an IP
    try:
        result = subprocess.run(
            ['ip', 'link', 'show', interface_name],
            capture_output=True,
            text=True,
            timeout=2
        )
        if result.returncode == 0:
            return 'state UP' in result.stdout
    except Exception:
        pass

    return False


def gather_ethernet_interfaces(default_interface: str = 'eth0') -> List[Dict]: