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Socks5TerminalHandler Class — netty Architecture

Architecture documentation for the Socks5TerminalHandler class in Socks5ProxyServer.java from the netty codebase.

Class java

Entity Profile

Dependency Diagram

graph TD
  45648d14_0457_7c46_85c2_3fae5c2b12e7["Socks5TerminalHandler"]
  2b2df286_a481_d3ed_6921_e4b21fd7f37c["Socks5ProxyServer.java"]
  45648d14_0457_7c46_85c2_3fae5c2b12e7 -->|defined in| 2b2df286_a481_d3ed_6921_e4b21fd7f37c
  8d894358_6082_45ac_0214_3983ac1b3788["handleProxyProtocol()"]
  45648d14_0457_7c46_85c2_3fae5c2b12e7 -->|method| 8d894358_6082_45ac_0214_3983ac1b3788

Relationship Graph

Source Code

handler-proxy/src/test/java/io/netty/handler/proxy/Socks5ProxyServer.java lines 198–235

    private final class Socks5TerminalHandler extends TerminalHandler {

        private boolean authenticated;

        @Override
        protected boolean handleProxyProtocol(ChannelHandlerContext ctx, Object msg) throws Exception {
            if (!authenticated) {
                authenticated = authenticate(ctx, msg);
                return false;
            }

            Socks5CommandRequest req = (Socks5CommandRequest) msg;
            assertEquals(Socks5CommandType.CONNECT, req.type());

            ctx.pipeline().addBefore(ctx.name(), "lineDecoder", new LineBasedFrameDecoder(64, false, true));

            Socks5CommandResponse res;
            boolean sendGreeting = false;
            if (!req.dstAddr().equals(destination.getHostString()) ||
                       req.dstPort() != destination.getPort()) {
                res = new DefaultSocks5CommandResponse(Socks5CommandStatus.FORBIDDEN, Socks5AddressType.IPv4);
            } else {
                res = new DefaultSocks5CommandResponse(Socks5CommandStatus.SUCCESS, Socks5AddressType.IPv4);
                sendGreeting = true;
            }

            ctx.write(res);

            ctx.pipeline().remove(ENCODER);
            ctx.pipeline().remove(DECODER);

            if (sendGreeting) {
                ctx.write(Unpooled.copiedBuffer("0\n", CharsetUtil.US_ASCII));
            }

            return true;
        }
    }

Defined In

Source

Frequently Asked Questions

What is the Socks5TerminalHandler class?
Socks5TerminalHandler is a class in the netty codebase, defined in handler-proxy/src/test/java/io/netty/handler/proxy/Socks5ProxyServer.java.
Where is Socks5TerminalHandler defined?
Socks5TerminalHandler is defined in handler-proxy/src/test/java/io/netty/handler/proxy/Socks5ProxyServer.java at line 198.

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