// Get information about network devices present on the system.
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"}
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
}
