Method cleanupExistingInterface

backend/wireguard/manager.go:281–298

cleanupExistingInterface removes existing interface if it exists

()

// cleanupExistingInterface removes existing interface if it exists
func (m *Manager) cleanupExistingInterface() error {
	nl := m.getNetlinkOps()
	link, err := nl.LinkByName(m.iFaceName)
	if err != nil {
		// Interface doesn't exist, no need to clean up.
		var notFoundErr netlink.LinkNotFoundError
		if errors.As(err, &notFoundErr) {
			return nil
		}
		return fmt.Errorf("link lookup: %w", err)
	}

	if err := nl.LinkDel(link); err != nil {
		return fmt.Errorf("link delete: %w", wrapPermissionDeniedError("deleting wireguard interface", err))
	}

	return nil
}

// GetInterfaceStats returns RX/TX statistics for the interface
func (m *Manager) GetInterfaceStats() (rxBytes, txBytes int64, err error) {