Package io.netty.util.internal
Class MacAddressUtil
java.lang.Object
io.netty.util.internal.MacAddressUtil
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate static final int
private static final int
private static final InternalLogger
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic byte[]
Obtains the best MAC address found on local network interfaces.(package private) static int
compareAddresses
(byte[] current, byte[] candidate) private static int
compareAddresses
(InetAddress current, InetAddress candidate) static byte[]
Returns the result ofbestAvailableMac()
if non-null
otherwise returns a random EUI-64 MAC address.static String
formatAddress
(byte[] addr) static byte[]
Parse a EUI-48, MAC-48, or EUI-64 MAC address from aString
and return it as abyte[]
.private static int
scoreAddress
(InetAddress addr) private static void
validateMacSeparator
(char separator)
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Field Details
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logger
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EUI64_MAC_ADDRESS_LENGTH
private static final int EUI64_MAC_ADDRESS_LENGTH- See Also:
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EUI48_MAC_ADDRESS_LENGTH
private static final int EUI48_MAC_ADDRESS_LENGTH- See Also:
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Constructor Details
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MacAddressUtil
private MacAddressUtil()
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Method Details
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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.
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defaultMachineId
public static byte[] defaultMachineId()Returns the result ofbestAvailableMac()
if non-null
otherwise returns a random EUI-64 MAC address. -
parseMAC
Parse a EUI-48, MAC-48, or EUI-64 MAC address from aString
and return it as abyte[]
.- Parameters:
value
- The string representation of the MAC address.- Returns:
- The byte representation of the MAC address.
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validateMacSeparator
private static void validateMacSeparator(char separator) -
formatAddress
- Parameters:
addr
- byte array of a MAC address.- Returns:
- hex formatted MAC address.
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compareAddresses
static int compareAddresses(byte[] current, byte[] candidate) - Returns:
- positive - current is better, 0 - cannot tell from MAC addr, negative - candidate is better.
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compareAddresses
- Returns:
- positive - current is better, 0 - cannot tell, negative - candidate is better
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scoreAddress
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