Class MacAddressUtil

java.lang.Object
io.netty.util.internal.MacAddressUtil

public final class MacAddressUtil extends Object
  • Field Details

  • Constructor Details

    • MacAddressUtil

      private MacAddressUtil()
  • Method Details

    • bestAvailableMac

      public static byte[] bestAvailableMac()
      Obtains the best MAC address found on local network interfaces. Generally speaking, an active network interface used on public networks is better than a local network interface.
      Returns:
      byte array containing a MAC. null if no MAC can be found.
    • defaultMachineId

      public static byte[] defaultMachineId()
      Returns the result of bestAvailableMac() if non-null otherwise returns a random EUI-64 MAC address.
    • parseMAC

      public static byte[] parseMAC(String value)
      Parse a EUI-48, MAC-48, or EUI-64 MAC address from a String and return it as a byte[].
      Parameters:
      value - The string representation of the MAC address.
      Returns:
      The byte representation of the MAC address.
    • validateMacSeparator

      private static void validateMacSeparator(char separator)
    • formatAddress

      public static String formatAddress(byte[] addr)
      Parameters:
      addr - byte array of a MAC address.
      Returns:
      hex formatted MAC address.
    • compareAddresses

      static int compareAddresses(byte[] current, byte[] candidate)
      Returns:
      positive - current is better, 0 - cannot tell from MAC addr, negative - candidate is better.
    • compareAddresses

      private static int compareAddresses(InetAddress current, InetAddress candidate)
      Returns:
      positive - current is better, 0 - cannot tell, negative - candidate is better
    • scoreAddress

      private static int scoreAddress(InetAddress addr)