func GetNetworkDevices()

in utils/sysinfo/sysinfo.go [98:149]
50 lines of code
13 McCabe index (conditional complexity)

func GetNetworkDevices(sysfs sysfs.SysFs) ([]info.NetInfo, error) {
	devs, err := sysfs.GetNetworkDevices()
	if err != nil {
		return nil, err
	}
	netDevices := []info.NetInfo{}
	for _, dev := range devs {
		name := dev.Name()
		// Ignore docker, loopback, and veth devices.
		ignoredDevices := []string{"lo", "veth", "docker", "nerdctl"}
		ignored := false
		for _, prefix := range ignoredDevices {
			if strings.HasPrefix(name, prefix) {
				ignored = true
				break
			}
		}
		if ignored {
			continue
		}
		address, err := sysfs.GetNetworkAddress(name)
		if err != nil {
			return nil, err
		}
		mtuStr, err := sysfs.GetNetworkMtu(name)
		if err != nil {
			return nil, err
		}
		var mtu int64
		n, err := fmt.Sscanf(mtuStr, "%d", &mtu)
		if err != nil || n != 1 {
			return nil, fmt.Errorf("could not parse mtu from %s for device %s", mtuStr, name)
		}
		netInfo := info.NetInfo{
			Name:       name,
			MacAddress: strings.TrimSpace(address),
			Mtu:        mtu,
		}
		speed, err := sysfs.GetNetworkSpeed(name)
		// Some devices don't set speed.
		if err == nil {
			var s int64
			n, err := fmt.Sscanf(speed, "%d", &s)
			if err != nil || n != 1 {
				return nil, fmt.Errorf("could not parse speed from %s for device %s", speed, name)
			}
			netInfo.Speed = s
		}
		netDevices = append(netDevices, netInfo)
	}
	return netDevices, nil
}