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 class io.netty.handler.codec.socksx.v4.Socks4ServerDecoder extends io.netty.handler.codec.ReplayingDecoder<io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder
  super_class: io.netty.handler.codec.ReplayingDecoder
{
  private static final int MAX_FIELD_LENGTH;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 255

  private io.netty.handler.codec.socksx.v4.Socks4CommandType type;
    descriptor: Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
    flags: (0x0002) ACC_PRIVATE

  private java.lang.String dstAddr;
    descriptor: Ljava/lang/String;
    flags: (0x0002) ACC_PRIVATE

  private int dstPort;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  private java.lang.String userId;
    descriptor: Ljava/lang/String;
    flags: (0x0002) ACC_PRIVATE

  private static volatile int[] $SWITCH_TABLE$io$netty$handler$codec$socksx$v4$Socks4ServerDecoder$State;
    descriptor: [I
    flags: (0x104a) ACC_PRIVATE, ACC_STATIC, ACC_VOLATILE, ACC_SYNTHETIC

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.socksx.v4.Socks4ServerDecoder this
         0: .line 54
            aload 0 /* this */
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.START:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokespecial io.netty.handler.codec.ReplayingDecoder.<init>:(Ljava/lang/Object;)V
         1: .line 55
            aload 0 /* this */
            iconst_1
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.setSingleDecode:(Z)V
         2: .line 56
            return
        end local 0 // io.netty.handler.codec.socksx.v4.Socks4ServerDecoder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder;

  protected void decode(io.netty.channel.ChannelHandlerContext, io.netty.buffer.ByteBuf, java.util.List<java.lang.Object>);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;Ljava/util/List;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=7, locals=5, args_size=4
        start local 0 // io.netty.handler.codec.socksx.v4.Socks4ServerDecoder this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // io.netty.buffer.ByteBuf in
        start local 3 // java.util.List out
         0: .line 61
            invokestatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.$SWITCH_TABLE$io$netty$handler$codec$socksx$v4$Socks4ServerDecoder$State:()[I
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.state:()Ljava/lang/Object;
            checkcast io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.ordinal:()I
            iaload
            tableswitch { // 1 - 5
                    1: 1
                    2: 8
                    3: 10
                    4: 14
                    5: 18
              default: 19
          }
         1: .line 63
      StackMap locals:
      StackMap stack:
            aload 2 /* in */
            invokevirtual io.netty.buffer.ByteBuf.readUnsignedByte:()S
            istore 4 /* version */
        start local 4 // int version
         2: .line 64
            iload 4 /* version */
            getstatic io.netty.handler.codec.socksx.SocksVersion.SOCKS4a:Lio/netty/handler/codec/socksx/SocksVersion;
            invokevirtual io.netty.handler.codec.socksx.SocksVersion.byteValue:()B
            if_icmpeq 4
         3: .line 65
            new io.netty.handler.codec.DecoderException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unsupported protocol version: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            iload 4 /* version */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial io.netty.handler.codec.DecoderException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 68
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            aload 2 /* in */
            invokevirtual io.netty.buffer.ByteBuf.readByte:()B
            invokestatic io.netty.handler.codec.socksx.v4.Socks4CommandType.valueOf:(B)Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
            putfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.type:Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
         5: .line 69
            aload 0 /* this */
            aload 2 /* in */
            invokevirtual io.netty.buffer.ByteBuf.readUnsignedShort:()I
            putfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstPort:I
         6: .line 70
            aload 0 /* this */
            aload 2 /* in */
            invokevirtual io.netty.buffer.ByteBuf.readInt:()I
            invokestatic io.netty.util.NetUtil.intToIpAddress:(I)Ljava/lang/String;
            putfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstAddr:Ljava/lang/String;
         7: .line 71
            aload 0 /* this */
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.READ_USERID:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.checkpoint:(Ljava/lang/Object;)V
        end local 4 // int version
         8: .line 74
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            ldc "userid"
            aload 2 /* in */
            invokestatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.readString:(Ljava/lang/String;Lio/netty/buffer/ByteBuf;)Ljava/lang/String;
            putfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.userId:Ljava/lang/String;
         9: .line 75
            aload 0 /* this */
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.READ_DOMAIN:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.checkpoint:(Ljava/lang/Object;)V
        10: .line 79
      StackMap locals:
      StackMap stack:
            ldc "0.0.0.0"
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstAddr:Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifne 12
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstAddr:Ljava/lang/String;
            ldc "0.0.0."
            invokevirtual java.lang.String.startsWith:(Ljava/lang/String;)Z
            ifeq 12
        11: .line 80
            aload 0 /* this */
            ldc "dstAddr"
            aload 2 /* in */
            invokestatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.readString:(Ljava/lang/String;Lio/netty/buffer/ByteBuf;)Ljava/lang/String;
            putfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstAddr:Ljava/lang/String;
        12: .line 82
      StackMap locals:
      StackMap stack:
            aload 3 /* out */
            new io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest
            dup
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.type:Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstAddr:Ljava/lang/String;
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstPort:I
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.userId:Ljava/lang/String;
            invokespecial io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.<init>:(Lio/netty/handler/codec/socksx/v4/Socks4CommandType;Ljava/lang/String;ILjava/lang/String;)V
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
        13: .line 83
            aload 0 /* this */
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.SUCCESS:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.checkpoint:(Ljava/lang/Object;)V
        14: .line 86
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.actualReadableBytes:()I
            istore 4 /* readableBytes */
        start local 4 // int readableBytes
        15: .line 87
            iload 4 /* readableBytes */
            ifle 22
        16: .line 88
            aload 3 /* out */
            aload 2 /* in */
            iload 4 /* readableBytes */
            invokevirtual io.netty.buffer.ByteBuf.readRetainedSlice:(I)Lio/netty/buffer/ByteBuf;
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
        17: .line 90
            goto 22
        end local 4 // int readableBytes
        18: .line 93
      StackMap locals:
      StackMap stack:
            aload 2 /* in */
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.actualReadableBytes:()I
            invokevirtual io.netty.buffer.ByteBuf.skipBytes:(I)Lio/netty/buffer/ByteBuf;
            pop
        19: .line 97
      StackMap locals:
      StackMap stack:
            goto 22
      StackMap locals:
      StackMap stack: java.lang.Exception
        20: astore 4 /* e */
        start local 4 // java.lang.Exception e
        21: .line 98
            aload 0 /* this */
            aload 3 /* out */
            aload 4 /* e */
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.fail:(Ljava/util/List;Ljava/lang/Exception;)V
        end local 4 // java.lang.Exception e
        22: .line 100
      StackMap locals:
      StackMap stack:
            return
        end local 3 // java.util.List out
        end local 2 // io.netty.buffer.ByteBuf in
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.socksx.v4.Socks4ServerDecoder this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   23     0           this  Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder;
            0   23     1            ctx  Lio/netty/channel/ChannelHandlerContext;
            0   23     2             in  Lio/netty/buffer/ByteBuf;
            0   23     3            out  Ljava/util/List<Ljava/lang/Object;>;
            2    8     4        version  I
           15   18     4  readableBytes  I
           21   22     4              e  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
           0    19      20  Class java.lang.Exception
    Exceptions:
      throws java.lang.Exception
    Signature: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;Ljava/util/List<Ljava/lang/Object;>;)V
    MethodParameters:
      Name  Flags
      ctx   
      in    
      out   

  private void fail(java.util.List<java.lang.Object>, java.lang.Exception);
    descriptor: (Ljava/util/List;Ljava/lang/Exception;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=6, locals=4, args_size=3
        start local 0 // io.netty.handler.codec.socksx.v4.Socks4ServerDecoder this
        start local 1 // java.util.List out
        start local 2 // java.lang.Exception cause
         0: .line 103
            aload 2 /* cause */
            instanceof io.netty.handler.codec.DecoderException
            ifne 2
         1: .line 104
            new io.netty.handler.codec.DecoderException
            dup
            aload 2 /* cause */
            invokespecial io.netty.handler.codec.DecoderException.<init>:(Ljava/lang/Throwable;)V
            astore 2 /* cause */
         2: .line 107
      StackMap locals:
      StackMap stack:
            new io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest
            dup
         3: .line 108
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.type:Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
            ifnull 4
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.type:Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
            goto 5
      StackMap locals: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder java.util.List java.lang.Exception
      StackMap stack: new 2 new 2
         4: getstatic io.netty.handler.codec.socksx.v4.Socks4CommandType.CONNECT:Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
         5: .line 109
      StackMap locals: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder java.util.List java.lang.Exception
      StackMap stack: new 2 new 2 io.netty.handler.codec.socksx.v4.Socks4CommandType
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstAddr:Ljava/lang/String;
            ifnull 6
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstAddr:Ljava/lang/String;
            goto 7
      StackMap locals: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder java.util.List java.lang.Exception
      StackMap stack: new 2 new 2 io.netty.handler.codec.socksx.v4.Socks4CommandType
         6: ldc ""
         7: .line 110
      StackMap locals: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder java.util.List java.lang.Exception
      StackMap stack: new 2 new 2 io.netty.handler.codec.socksx.v4.Socks4CommandType java.lang.String
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstPort:I
            ifeq 8
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.dstPort:I
            goto 9
      StackMap locals: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder java.util.List java.lang.Exception
      StackMap stack: new 2 new 2 io.netty.handler.codec.socksx.v4.Socks4CommandType java.lang.String
         8: ldc 65535
         9: .line 111
      StackMap locals: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder java.util.List java.lang.Exception
      StackMap stack: new 2 new 2 io.netty.handler.codec.socksx.v4.Socks4CommandType java.lang.String int
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.userId:Ljava/lang/String;
            ifnull 10
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.userId:Ljava/lang/String;
            goto 11
      StackMap locals: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder java.util.List java.lang.Exception
      StackMap stack: new 2 new 2 io.netty.handler.codec.socksx.v4.Socks4CommandType java.lang.String int
        10: ldc ""
        11: .line 107
      StackMap locals: io.netty.handler.codec.socksx.v4.Socks4ServerDecoder java.util.List java.lang.Exception
      StackMap stack: new 2 new 2 io.netty.handler.codec.socksx.v4.Socks4CommandType java.lang.String int java.lang.String
            invokespecial io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.<init>:(Lio/netty/handler/codec/socksx/v4/Socks4CommandType;Ljava/lang/String;ILjava/lang/String;)V
            astore 3 /* m */
        start local 3 // io.netty.handler.codec.socksx.v4.Socks4CommandRequest m
        12: .line 113
            aload 3 /* m */
            aload 2 /* cause */
            invokestatic io.netty.handler.codec.DecoderResult.failure:(Ljava/lang/Throwable;)Lio/netty/handler/codec/DecoderResult;
            invokeinterface io.netty.handler.codec.socksx.v4.Socks4CommandRequest.setDecoderResult:(Lio/netty/handler/codec/DecoderResult;)V
        13: .line 114
            aload 1 /* out */
            aload 3 /* m */
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
        14: .line 116
            aload 0 /* this */
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.FAILURE:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.checkpoint:(Ljava/lang/Object;)V
        15: .line 117
            return
        end local 3 // io.netty.handler.codec.socksx.v4.Socks4CommandRequest m
        end local 2 // java.lang.Exception cause
        end local 1 // java.util.List out
        end local 0 // io.netty.handler.codec.socksx.v4.Socks4ServerDecoder this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   16     0   this  Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder;
            0   16     1    out  Ljava/util/List<Ljava/lang/Object;>;
            0   16     2  cause  Ljava/lang/Exception;
           12   16     3      m  Lio/netty/handler/codec/socksx/v4/Socks4CommandRequest;
    Signature: (Ljava/util/List<Ljava/lang/Object;>;Ljava/lang/Exception;)V
    MethodParameters:
       Name  Flags
      out    
      cause  

  private static java.lang.String readString(java.lang.String, io.netty.buffer.ByteBuf);
    descriptor: (Ljava/lang/String;Lio/netty/buffer/ByteBuf;)Ljava/lang/String;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=4, args_size=2
        start local 0 // java.lang.String fieldName
        start local 1 // io.netty.buffer.ByteBuf in
         0: .line 123
            aload 1 /* in */
            sipush 256
            iconst_0
            invokevirtual io.netty.buffer.ByteBuf.bytesBefore:(IB)I
            istore 2 /* length */
        start local 2 // int length
         1: .line 124
            iload 2 /* length */
            ifge 3
         2: .line 125
            new io.netty.handler.codec.DecoderException
            dup
            new java.lang.StringBuilder
            dup
            ldc "field '"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* fieldName */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "' longer than "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            sipush 255
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            ldc " chars"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial io.netty.handler.codec.DecoderException.<init>:(Ljava/lang/String;)V
            athrow
         3: .line 128
      StackMap locals: int
      StackMap stack:
            aload 1 /* in */
            iload 2 /* length */
            invokevirtual io.netty.buffer.ByteBuf.readSlice:(I)Lio/netty/buffer/ByteBuf;
            getstatic io.netty.util.CharsetUtil.US_ASCII:Ljava/nio/charset/Charset;
            invokevirtual io.netty.buffer.ByteBuf.toString:(Ljava/nio/charset/Charset;)Ljava/lang/String;
            astore 3 /* value */
        start local 3 // java.lang.String value
         4: .line 129
            aload 1 /* in */
            iconst_1
            invokevirtual io.netty.buffer.ByteBuf.skipBytes:(I)Lio/netty/buffer/ByteBuf;
            pop
         5: .line 131
            aload 3 /* value */
            areturn
        end local 3 // java.lang.String value
        end local 2 // int length
        end local 1 // io.netty.buffer.ByteBuf in
        end local 0 // java.lang.String fieldName
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    6     0  fieldName  Ljava/lang/String;
            0    6     1         in  Lio/netty/buffer/ByteBuf;
            1    6     2     length  I
            4    6     3      value  Ljava/lang/String;
    MethodParameters:
           Name  Flags
      fieldName  
      in         

  static int[] $SWITCH_TABLE$io$netty$handler$codec$socksx$v4$Socks4ServerDecoder$State();
    descriptor: ()[I
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=3, locals=1, args_size=0
         0: .line 36
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.$SWITCH_TABLE$io$netty$handler$codec$socksx$v4$Socks4ServerDecoder$State:[I
            dup
            ifnull 1
            areturn
      StackMap locals:
      StackMap stack: int[]
         1: pop
            invokestatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.values:()[Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            arraylength
            newarray 10
            astore 0
         2: aload 0
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.FAILURE:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.ordinal:()I
            iconst_5
            iastore
         3: goto 5
      StackMap locals: int[]
      StackMap stack: java.lang.NoSuchFieldError
         4: pop
      StackMap locals:
      StackMap stack:
         5: aload 0
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.READ_DOMAIN:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.ordinal:()I
            iconst_3
            iastore
         6: goto 8
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
         7: pop
      StackMap locals:
      StackMap stack:
         8: aload 0
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.READ_USERID:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.ordinal:()I
            iconst_2
            iastore
         9: goto 11
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        10: pop
      StackMap locals:
      StackMap stack:
        11: aload 0
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.START:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.ordinal:()I
            iconst_1
            iastore
        12: goto 14
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        13: pop
      StackMap locals:
      StackMap stack:
        14: aload 0
            getstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.SUCCESS:Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;
            invokevirtual io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State.ordinal:()I
            iconst_4
            iastore
        15: goto 17
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        16: pop
      StackMap locals:
      StackMap stack:
        17: aload 0
            dup
            putstatic io.netty.handler.codec.socksx.v4.Socks4ServerDecoder.$SWITCH_TABLE$io$netty$handler$codec$socksx$v4$Socks4ServerDecoder$State:[I
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
      Exception table:
        from    to  target  type
           2     3       4  Class java.lang.NoSuchFieldError
           5     6       7  Class java.lang.NoSuchFieldError
           8     9      10  Class java.lang.NoSuchFieldError
          11    12      13  Class java.lang.NoSuchFieldError
          14    15      16  Class java.lang.NoSuchFieldError
}
Signature: Lio/netty/handler/codec/ReplayingDecoder<Lio/netty/handler/codec/socksx/v4/Socks4ServerDecoder$State;>;
SourceFile: "Socks4ServerDecoder.java"
NestMembers:
  io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State
InnerClasses:
  final State = io.netty.handler.codec.socksx.v4.Socks4ServerDecoder$State of io.netty.handler.codec.socksx.v4.Socks4ServerDecoder