decode() — netty Function Reference

Architecture documentation for the decode() function in Socks5CommandRequestDecoder.java from the netty codebase.

Function java Buffer Allocators calls 1

Entity Profile

Buffer→ Allocators→ decode() — netty Function Reference

Dependency Diagram

graph TD
  a7f50bee_53d6_ab01_d695_13dc24d8f39f["decode()"]
  e8e9c6d8_866c_2c7f_bad6_de6efe9ff434["Socks5CommandRequestDecoder"]
  a7f50bee_53d6_ab01_d695_13dc24d8f39f -->|defined in| e8e9c6d8_866c_2c7f_bad6_de6efe9ff434
  fb00be81_3365_e361_899e_856ea8cfc811["fail()"]
  a7f50bee_53d6_ab01_d695_13dc24d8f39f -->|calls| fb00be81_3365_e361_899e_856ea8cfc811
  style a7f50bee_53d6_ab01_d695_13dc24d8f39f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-socks/src/main/java/io/netty/handler/codec/socksx/v5/Socks5CommandRequestDecoder.java lines 58–93

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        try {
            switch (state()) {
            case INIT: {
                final byte version = in.readByte();
                if (version != SocksVersion.SOCKS5.byteValue()) {
                    throw new DecoderException(
                            "unsupported version: " + version + " (expected: " + SocksVersion.SOCKS5.byteValue() + ')');
                }

                final Socks5CommandType type = Socks5CommandType.valueOf(in.readByte());
                in.skipBytes(1); // RSV
                final Socks5AddressType dstAddrType = Socks5AddressType.valueOf(in.readByte());
                final String dstAddr = addressDecoder.decodeAddress(dstAddrType, in);
                final int dstPort = ByteBufUtil.readUnsignedShortBE(in);

                out.add(new DefaultSocks5CommandRequest(type, dstAddrType, dstAddr, dstPort));
                checkpoint(State.SUCCESS);
            }
            case SUCCESS: {
                int readableBytes = actualReadableBytes();
                if (readableBytes > 0) {
                    out.add(in.readRetainedSlice(readableBytes));
                }
                break;
            }
            case FAILURE: {
                in.skipBytes(actualReadableBytes());
                break;
            }
            }
        } catch (Exception e) {
            fail(out, e);
        }
    }