http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public final class io.netty.util.internal.MacAddressUtil
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: io.netty.util.internal.MacAddressUtil
  super_class: java.lang.Object
{
  private static final io.netty.util.internal.logging.InternalLogger logger;
    descriptor: Lio/netty/util/internal/logging/InternalLogger;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final int EUI64_MAC_ADDRESS_LENGTH;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 8

  private static final int EUI48_MAC_ADDRESS_LENGTH;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 6

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 35
            ldc Lio/netty/util/internal/MacAddressUtil;
            invokestatic io.netty.util.internal.logging.InternalLoggerFactory.getInstance:(Ljava/lang/Class;)Lio/netty/util/internal/logging/InternalLogger;
            putstatic io.netty.util.internal.MacAddressUtil.logger:Lio/netty/util/internal/logging/InternalLogger;
         1: .line 38
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static byte[] bestAvailableMac();
    descriptor: ()[B
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=10, args_size=0
         0: .line 49
            getstatic io.netty.util.internal.EmptyArrays.EMPTY_BYTES:[B
            astore 0 /* bestMacAddr */
        start local 0 // byte[] bestMacAddr
         1: .line 50
            getstatic io.netty.util.NetUtil.LOCALHOST4:Ljava/net/Inet4Address;
            astore 1 /* bestInetAddr */
        start local 1 // java.net.InetAddress bestInetAddr
         2: .line 53
            new java.util.LinkedHashMap
            dup
            invokespecial java.util.LinkedHashMap.<init>:()V
            astore 2 /* ifaces */
        start local 2 // java.util.Map ifaces
         3: .line 55
            invokestatic java.net.NetworkInterface.getNetworkInterfaces:()Ljava/util/Enumeration;
            astore 3 /* interfaces */
        start local 3 // java.util.Enumeration interfaces
         4: .line 56
            aload 3 /* interfaces */
            ifnull 16
         5: .line 57
            goto 12
         6: .line 58
      StackMap locals: byte[] java.net.InetAddress java.util.Map java.util.Enumeration
      StackMap stack:
            aload 3 /* interfaces */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            checkcast java.net.NetworkInterface
            astore 4 /* iface */
        start local 4 // java.net.NetworkInterface iface
         7: .line 60
            aload 4 /* iface */
            invokestatic io.netty.util.internal.SocketUtils.addressesFromNetworkInterface:(Ljava/net/NetworkInterface;)Ljava/util/Enumeration;
            astore 5 /* addrs */
        start local 5 // java.util.Enumeration addrs
         8: .line 61
            aload 5 /* addrs */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifeq 12
         9: .line 62
            aload 5 /* addrs */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            checkcast java.net.InetAddress
            astore 6 /* a */
        start local 6 // java.net.InetAddress a
        10: .line 63
            aload 6 /* a */
            invokevirtual java.net.InetAddress.isLoopbackAddress:()Z
            ifne 12
        11: .line 64
            aload 2 /* ifaces */
            aload 4 /* iface */
            aload 6 /* a */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        end local 6 // java.net.InetAddress a
        end local 5 // java.util.Enumeration addrs
        end local 4 // java.net.NetworkInterface iface
        12: .line 57
      StackMap locals:
      StackMap stack:
            aload 3 /* interfaces */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifne 6
        end local 3 // java.util.Enumeration interfaces
        13: .line 69
            goto 16
      StackMap locals: byte[] java.net.InetAddress java.util.Map
      StackMap stack: java.net.SocketException
        14: astore 3 /* e */
        start local 3 // java.net.SocketException e
        15: .line 70
            getstatic io.netty.util.internal.MacAddressUtil.logger:Lio/netty/util/internal/logging/InternalLogger;
            ldc "Failed to retrieve the list of available network interfaces"
            aload 3 /* e */
            invokeinterface io.netty.util.internal.logging.InternalLogger.warn:(Ljava/lang/String;Ljava/lang/Throwable;)V
        end local 3 // java.net.SocketException e
        16: .line 73
      StackMap locals:
      StackMap stack:
            aload 2 /* ifaces */
            invokeinterface java.util.Map.entrySet:()Ljava/util/Set;
            invokeinterface java.util.Set.iterator:()Ljava/util/Iterator;
            astore 4
            goto 43
      StackMap locals: byte[] java.net.InetAddress java.util.Map top java.util.Iterator
      StackMap stack:
        17: aload 4
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.util.Map$Entry
            astore 3 /* entry */
        start local 3 // java.util.Map$Entry entry
        18: .line 74
            aload 3 /* entry */
            invokeinterface java.util.Map$Entry.getKey:()Ljava/lang/Object;
            checkcast java.net.NetworkInterface
            astore 5 /* iface */
        start local 5 // java.net.NetworkInterface iface
        19: .line 75
            aload 3 /* entry */
            invokeinterface java.util.Map$Entry.getValue:()Ljava/lang/Object;
            checkcast java.net.InetAddress
            astore 6 /* inetAddr */
        start local 6 // java.net.InetAddress inetAddr
        20: .line 76
            aload 5 /* iface */
            invokevirtual java.net.NetworkInterface.isVirtual:()Z
            ifeq 22
        21: .line 77
            goto 43
        22: .line 82
      StackMap locals: byte[] java.net.InetAddress java.util.Map java.util.Map$Entry java.util.Iterator java.net.NetworkInterface java.net.InetAddress
      StackMap stack:
            aload 5 /* iface */
            invokestatic io.netty.util.internal.SocketUtils.hardwareAddressFromNetworkInterface:(Ljava/net/NetworkInterface;)[B
            astore 7 /* macAddr */
        start local 7 // byte[] macAddr
        23: .line 83
            goto 27
        end local 7 // byte[] macAddr
      StackMap locals:
      StackMap stack: java.net.SocketException
        24: astore 8 /* e */
        start local 8 // java.net.SocketException e
        25: .line 84
            getstatic io.netty.util.internal.MacAddressUtil.logger:Lio/netty/util/internal/logging/InternalLogger;
            ldc "Failed to get the hardware address of a network interface: {}"
            aload 5 /* iface */
            aload 8 /* e */
            invokeinterface io.netty.util.internal.logging.InternalLogger.debug:(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
        26: .line 85
            goto 43
        end local 8 // java.net.SocketException e
        start local 7 // byte[] macAddr
        27: .line 88
      StackMap locals: byte[]
      StackMap stack:
            iconst_0
            istore 8 /* replace */
        start local 8 // boolean replace
        28: .line 89
            aload 0 /* bestMacAddr */
            aload 7 /* macAddr */
            invokestatic io.netty.util.internal.MacAddressUtil.compareAddresses:([B[B)I
            istore 9 /* res */
        start local 9 // int res
        29: .line 90
            iload 9 /* res */
            ifge 32
        30: .line 92
            iconst_1
            istore 8 /* replace */
        31: .line 93
            goto 40
      StackMap locals: int int
      StackMap stack:
        32: iload 9 /* res */
            ifne 40
        33: .line 95
            aload 1 /* bestInetAddr */
            aload 6 /* inetAddr */
            invokestatic io.netty.util.internal.MacAddressUtil.compareAddresses:(Ljava/net/InetAddress;Ljava/net/InetAddress;)I
            istore 9 /* res */
        34: .line 96
            iload 9 /* res */
            ifge 37
        35: .line 98
            iconst_1
            istore 8 /* replace */
        36: .line 99
            goto 40
      StackMap locals:
      StackMap stack:
        37: iload 9 /* res */
            ifne 40
        38: .line 101
            aload 0 /* bestMacAddr */
            arraylength
            aload 7 /* macAddr */
            arraylength
            if_icmpge 40
        39: .line 102
            iconst_1
            istore 8 /* replace */
        40: .line 107
      StackMap locals:
      StackMap stack:
            iload 8 /* replace */
            ifeq 43
        41: .line 108
            aload 7 /* macAddr */
            astore 0 /* bestMacAddr */
        42: .line 109
            aload 6 /* inetAddr */
            astore 1 /* bestInetAddr */
        end local 9 // int res
        end local 8 // boolean replace
        end local 7 // byte[] macAddr
        end local 6 // java.net.InetAddress inetAddr
        end local 5 // java.net.NetworkInterface iface
        end local 3 // java.util.Map$Entry entry
        43: .line 73
      StackMap locals: byte[] java.net.InetAddress java.util.Map top java.util.Iterator
      StackMap stack:
            aload 4
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 17
        44: .line 113
            aload 0 /* bestMacAddr */
            getstatic io.netty.util.internal.EmptyArrays.EMPTY_BYTES:[B
            if_acmpne 46
        45: .line 114
            aconst_null
            areturn
        46: .line 117
      StackMap locals: byte[] java.net.InetAddress java.util.Map
      StackMap stack:
            aload 0 /* bestMacAddr */
            arraylength
            tableswitch { // 6 - 6
                    6: 47
              default: 54
          }
        47: .line 119
      StackMap locals:
      StackMap stack:
            bipush 8
            newarray 8
            astore 3 /* newAddr */
        start local 3 // byte[] newAddr
        48: .line 120
            aload 0 /* bestMacAddr */
            iconst_0
            aload 3 /* newAddr */
            iconst_0
            iconst_3
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        49: .line 121
            aload 3 /* newAddr */
            iconst_3
            iconst_m1
            bastore
        50: .line 122
            aload 3 /* newAddr */
            iconst_4
            bipush -2
            bastore
        51: .line 123
            aload 0 /* bestMacAddr */
            iconst_3
            aload 3 /* newAddr */
            iconst_5
            iconst_3
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        52: .line 124
            aload 3 /* newAddr */
            astore 0 /* bestMacAddr */
        53: .line 125
            goto 55
        end local 3 // byte[] newAddr
        54: .line 127
      StackMap locals:
      StackMap stack:
            aload 0 /* bestMacAddr */
            bipush 8
            invokestatic java.util.Arrays.copyOf:([BI)[B
            astore 0 /* bestMacAddr */
        55: .line 130
      StackMap locals:
      StackMap stack:
            aload 0 /* bestMacAddr */
            areturn
        end local 2 // java.util.Map ifaces
        end local 1 // java.net.InetAddress bestInetAddr
        end local 0 // byte[] bestMacAddr
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            1   56     0   bestMacAddr  [B
            2   56     1  bestInetAddr  Ljava/net/InetAddress;
            3   56     2        ifaces  Ljava/util/Map<Ljava/net/NetworkInterface;Ljava/net/InetAddress;>;
            4   13     3    interfaces  Ljava/util/Enumeration<Ljava/net/NetworkInterface;>;
            7   12     4         iface  Ljava/net/NetworkInterface;
            8   12     5         addrs  Ljava/util/Enumeration<Ljava/net/InetAddress;>;
           10   12     6             a  Ljava/net/InetAddress;
           15   16     3             e  Ljava/net/SocketException;
           18   43     3         entry  Ljava/util/Map$Entry<Ljava/net/NetworkInterface;Ljava/net/InetAddress;>;
           19   43     5         iface  Ljava/net/NetworkInterface;
           20   43     6      inetAddr  Ljava/net/InetAddress;
           23   24     7       macAddr  [B
           27   43     7       macAddr  [B
           25   27     8             e  Ljava/net/SocketException;
           28   43     8       replace  Z
           29   43     9           res  I
           48   54     3       newAddr  [B
      Exception table:
        from    to  target  type
           3    13      14  Class java.net.SocketException
          22    23      24  Class java.net.SocketException

  public static byte[] defaultMachineId();
    descriptor: ()[B
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=0
         0: .line 138
            invokestatic io.netty.util.internal.MacAddressUtil.bestAvailableMac:()[B
            astore 0 /* bestMacAddr */
        start local 0 // byte[] bestMacAddr
         1: .line 139
            aload 0 /* bestMacAddr */
            ifnonnull 8
         2: .line 140
            bipush 8
            newarray 8
            astore 0 /* bestMacAddr */
         3: .line 141
            invokestatic io.netty.util.internal.PlatformDependent.threadLocalRandom:()Ljava/util/Random;
            aload 0 /* bestMacAddr */
            invokevirtual java.util.Random.nextBytes:([B)V
         4: .line 142
            getstatic io.netty.util.internal.MacAddressUtil.logger:Lio/netty/util/internal/logging/InternalLogger;
         5: .line 143
            ldc "Failed to find a usable hardware address from the network interfaces; using random bytes: {}"
         6: .line 144
            aload 0 /* bestMacAddr */
            invokestatic io.netty.util.internal.MacAddressUtil.formatAddress:([B)Ljava/lang/String;
         7: .line 142
            invokeinterface io.netty.util.internal.logging.InternalLogger.warn:(Ljava/lang/String;Ljava/lang/Object;)V
         8: .line 146
      StackMap locals: byte[]
      StackMap stack:
            aload 0 /* bestMacAddr */
            areturn
        end local 0 // byte[] bestMacAddr
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            1    9     0  bestMacAddr  [B

  public static byte[] parseMAC(java.lang.String);
    descriptor: (Ljava/lang/String;)[B
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=7, args_size=1
        start local 0 // java.lang.String value
         0: .line 157
            aload 0 /* value */
            invokevirtual java.lang.String.length:()I
            lookupswitch { // 2
                   17: 1
                   23: 5
              default: 9
          }
         1: .line 159
      StackMap locals:
      StackMap stack:
            aload 0 /* value */
            iconst_2
            invokevirtual java.lang.String.charAt:(I)C
            istore 2 /* separator */
        start local 2 // char separator
         2: .line 160
            iload 2 /* separator */
            invokestatic io.netty.util.internal.MacAddressUtil.validateMacSeparator:(C)V
         3: .line 161
            bipush 6
            newarray 8
            astore 1 /* machineId */
        start local 1 // byte[] machineId
         4: .line 162
            goto 10
        end local 2 // char separator
        end local 1 // byte[] machineId
         5: .line 164
      StackMap locals:
      StackMap stack:
            aload 0 /* value */
            iconst_2
            invokevirtual java.lang.String.charAt:(I)C
            istore 2 /* separator */
        start local 2 // char separator
         6: .line 165
            iload 2 /* separator */
            invokestatic io.netty.util.internal.MacAddressUtil.validateMacSeparator:(C)V
         7: .line 166
            bipush 8
            newarray 8
            astore 1 /* machineId */
        start local 1 // byte[] machineId
         8: .line 167
            goto 10
        end local 2 // char separator
        end local 1 // byte[] machineId
         9: .line 169
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            ldc "value is not supported [MAC-48, EUI-48, EUI-64]"
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        start local 1 // byte[] machineId
        start local 2 // char separator
        10: .line 172
      StackMap locals: byte[] int
      StackMap stack:
            aload 1 /* machineId */
            arraylength
            iconst_1
            isub
            istore 3 /* end */
        start local 3 // int end
        11: .line 173
            iconst_0
            istore 4 /* j */
        start local 4 // int j
        12: .line 174
            iconst_0
            istore 5 /* i */
        start local 5 // int i
        13: goto 21
        14: .line 175
      StackMap locals: int int int
      StackMap stack:
            iload 4 /* j */
            iconst_2
            iadd
            istore 6 /* sIndex */
        start local 6 // int sIndex
        15: .line 176
            aload 1 /* machineId */
            iload 5 /* i */
            aload 0 /* value */
            iload 4 /* j */
            invokestatic io.netty.util.internal.StringUtil.decodeHexByte:(Ljava/lang/CharSequence;I)B
            bastore
        16: .line 177
            aload 0 /* value */
            iload 6 /* sIndex */
            invokevirtual java.lang.String.charAt:(I)C
            iload 2 /* separator */
            if_icmpeq 20
        17: .line 178
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "expected separator '"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            iload 2 /* separator */
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            ldc " but got '"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        18: .line 179
            aload 0 /* value */
            iload 6 /* sIndex */
            invokevirtual java.lang.String.charAt:(I)C
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            ldc "' at index: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            iload 6 /* sIndex */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        19: .line 178
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        end local 6 // int sIndex
        20: .line 174
      StackMap locals:
      StackMap stack:
            iinc 5 /* i */ 1
            iinc 4 /* j */ 3
      StackMap locals:
      StackMap stack:
        21: iload 5 /* i */
            iload 3 /* end */
            if_icmplt 14
        end local 5 // int i
        22: .line 183
            aload 1 /* machineId */
            iload 3 /* end */
            aload 0 /* value */
            iload 4 /* j */
            invokestatic io.netty.util.internal.StringUtil.decodeHexByte:(Ljava/lang/CharSequence;I)B
            bastore
        23: .line 185
            aload 1 /* machineId */
            areturn
        end local 4 // int j
        end local 3 // int end
        end local 2 // char separator
        end local 1 // byte[] machineId
        end local 0 // java.lang.String value
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   24     0      value  Ljava/lang/String;
            4    5     1  machineId  [B
            8    9     1  machineId  [B
           10   24     1  machineId  [B
            2    5     2  separator  C
            6    9     2  separator  C
           10   24     2  separator  C
           11   24     3        end  I
           12   24     4          j  I
           13   22     5          i  I
           15   20     6     sIndex  I
    MethodParameters:
       Name  Flags
      value  

  private static void validateMacSeparator(char);
    descriptor: (C)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // char separator
         0: .line 189
            iload 0 /* separator */
            bipush 58
            if_icmpeq 2
            iload 0 /* separator */
            bipush 45
            if_icmpeq 2
         1: .line 190
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unsupported separator: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            iload 0 /* separator */
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            ldc " (expected: [:-])"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 192
      StackMap locals:
      StackMap stack:
            return
        end local 0 // char separator
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    3     0  separator  C
    MethodParameters:
           Name  Flags
      separator  

  public static java.lang.String formatAddress(byte[]);
    descriptor: ([B)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=7, locals=6, args_size=1
        start local 0 // byte[] addr
         0: .line 199
            new java.lang.StringBuilder
            dup
            bipush 24
            invokespecial java.lang.StringBuilder.<init>:(I)V
            astore 1 /* buf */
        start local 1 // java.lang.StringBuilder buf
         1: .line 200
            aload 0 /* addr */
            dup
            astore 5
            arraylength
            istore 4
            iconst_0
            istore 3
            goto 5
      StackMap locals: byte[] java.lang.StringBuilder top int int byte[]
      StackMap stack:
         2: aload 5
            iload 3
            baload
            istore 2 /* b */
        start local 2 // byte b
         3: .line 201
            aload 1 /* buf */
            ldc "%02x:"
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            iload 2 /* b */
            sipush 255
            iand
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            aastore
            invokestatic java.lang.String.format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        end local 2 // byte b
         4: .line 200
            iinc 3 1
      StackMap locals:
      StackMap stack:
         5: iload 3
            iload 4
            if_icmplt 2
         6: .line 203
            aload 1 /* buf */
            iconst_0
            aload 1 /* buf */
            invokevirtual java.lang.StringBuilder.length:()I
            iconst_1
            isub
            invokevirtual java.lang.StringBuilder.substring:(II)Ljava/lang/String;
            areturn
        end local 1 // java.lang.StringBuilder buf
        end local 0 // byte[] addr
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  addr  [B
            1    7     1   buf  Ljava/lang/StringBuilder;
            3    4     2     b  B
    MethodParameters:
      Name  Flags
      addr  

  static int compareAddresses(byte[], byte[]);
    descriptor: ([B[B)I
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=7, args_size=2
        start local 0 // byte[] current
        start local 1 // byte[] candidate
         0: .line 211
            aload 1 /* candidate */
            ifnull 1
            aload 1 /* candidate */
            arraylength
            bipush 6
            if_icmpge 2
         1: .line 212
      StackMap locals:
      StackMap stack:
            iconst_1
            ireturn
         2: .line 216
      StackMap locals:
      StackMap stack:
            iconst_1
            istore 2 /* onlyZeroAndOne */
        start local 2 // boolean onlyZeroAndOne
         3: .line 217
            aload 1 /* candidate */
            dup
            astore 6
            arraylength
            istore 5
            iconst_0
            istore 4
            goto 9
      StackMap locals: byte[] byte[] int top int int byte[]
      StackMap stack:
         4: aload 6
            iload 4
            baload
            istore 3 /* b */
        start local 3 // byte b
         5: .line 218
            iload 3 /* b */
            ifeq 8
            iload 3 /* b */
            iconst_1
            if_icmpeq 8
         6: .line 219
            iconst_0
            istore 2 /* onlyZeroAndOne */
         7: .line 220
            goto 10
        end local 3 // byte b
         8: .line 217
      StackMap locals:
      StackMap stack:
            iinc 4 1
      StackMap locals:
      StackMap stack:
         9: iload 4
            iload 5
            if_icmplt 4
        10: .line 224
      StackMap locals: byte[] byte[] int
      StackMap stack:
            iload 2 /* onlyZeroAndOne */
            ifeq 12
        11: .line 225
            iconst_1
            ireturn
        12: .line 229
      StackMap locals:
      StackMap stack:
            aload 1 /* candidate */
            iconst_0
            baload
            iconst_1
            iand
            ifeq 14
        13: .line 230
            iconst_1
            ireturn
        14: .line 234
      StackMap locals:
      StackMap stack:
            aload 1 /* candidate */
            iconst_0
            baload
            iconst_2
            iand
            ifne 18
        15: .line 235
            aload 0 /* current */
            arraylength
            ifeq 17
            aload 0 /* current */
            iconst_0
            baload
            iconst_2
            iand
            ifne 17
        16: .line 237
            iconst_0
            ireturn
        17: .line 240
      StackMap locals:
      StackMap stack:
            iconst_m1
            ireturn
        18: .line 243
      StackMap locals:
      StackMap stack:
            aload 0 /* current */
            arraylength
            ifeq 20
            aload 0 /* current */
            iconst_0
            baload
            iconst_2
            iand
            ifne 20
        19: .line 245
            iconst_1
            ireturn
        20: .line 248
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 2 // boolean onlyZeroAndOne
        end local 1 // byte[] candidate
        end local 0 // byte[] current
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0   21     0         current  [B
            0   21     1       candidate  [B
            3   21     2  onlyZeroAndOne  Z
            5    8     3               b  B
    MethodParameters:
           Name  Flags
      current    
      candidate  

  private static int compareAddresses(java.net.InetAddress, java.net.InetAddress);
    descriptor: (Ljava/net/InetAddress;Ljava/net/InetAddress;)I
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // java.net.InetAddress current
        start local 1 // java.net.InetAddress candidate
         0: .line 257
            aload 0 /* current */
            invokestatic io.netty.util.internal.MacAddressUtil.scoreAddress:(Ljava/net/InetAddress;)I
            aload 1 /* candidate */
            invokestatic io.netty.util.internal.MacAddressUtil.scoreAddress:(Ljava/net/InetAddress;)I
            isub
            ireturn
        end local 1 // java.net.InetAddress candidate
        end local 0 // java.net.InetAddress current
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    1     0    current  Ljava/net/InetAddress;
            0    1     1  candidate  Ljava/net/InetAddress;
    MethodParameters:
           Name  Flags
      current    
      candidate  

  private static int scoreAddress(java.net.InetAddress);
    descriptor: (Ljava/net/InetAddress;)I
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // java.net.InetAddress addr
         0: .line 261
            aload 0 /* addr */
            invokevirtual java.net.InetAddress.isAnyLocalAddress:()Z
            ifne 1
            aload 0 /* addr */
            invokevirtual java.net.InetAddress.isLoopbackAddress:()Z
            ifeq 2
         1: .line 262
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
         2: .line 264
      StackMap locals:
      StackMap stack:
            aload 0 /* addr */
            invokevirtual java.net.InetAddress.isMulticastAddress:()Z
            ifeq 4
         3: .line 265
            iconst_1
            ireturn
         4: .line 267
      StackMap locals:
      StackMap stack:
            aload 0 /* addr */
            invokevirtual java.net.InetAddress.isLinkLocalAddress:()Z
            ifeq 6
         5: .line 268
            iconst_2
            ireturn
         6: .line 270
      StackMap locals:
      StackMap stack:
            aload 0 /* addr */
            invokevirtual java.net.InetAddress.isSiteLocalAddress:()Z
            ifeq 8
         7: .line 271
            iconst_3
            ireturn
         8: .line 274
      StackMap locals:
      StackMap stack:
            iconst_4
            ireturn
        end local 0 // java.net.InetAddress addr
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0  addr  Ljava/net/InetAddress;
    MethodParameters:
      Name  Flags
      addr  

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.util.internal.MacAddressUtil this
         0: .line 277
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // io.netty.util.internal.MacAddressUtil this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/util/internal/MacAddressUtil;
}
SourceFile: "MacAddressUtil.java"
InnerClasses:
  public abstract Entry = java.util.Map$Entry of java.util.Map