Socks5ProxyHandler.java — netty Source File

Source Code

/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package io.netty.handler.proxy;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.socksx.v5.DefaultSocks5InitialRequest;
import io.netty.handler.codec.socksx.v5.DefaultSocks5CommandRequest;
import io.netty.handler.codec.socksx.v5.DefaultSocks5PasswordAuthRequest;
import io.netty.handler.codec.socksx.v5.DefaultSocks5PrivateAuthRequest;
import io.netty.handler.codec.socksx.v5.Socks5AddressType;
import io.netty.handler.codec.socksx.v5.Socks5AuthMethod;
import io.netty.handler.codec.socksx.v5.Socks5InitialRequest;
import io.netty.handler.codec.socksx.v5.Socks5InitialResponse;
import io.netty.handler.codec.socksx.v5.Socks5InitialResponseDecoder;
import io.netty.handler.codec.socksx.v5.Socks5ClientEncoder;
import io.netty.handler.codec.socksx.v5.Socks5CommandResponse;
import io.netty.handler.codec.socksx.v5.Socks5CommandResponseDecoder;
import io.netty.handler.codec.socksx.v5.Socks5CommandStatus;
import io.netty.handler.codec.socksx.v5.Socks5CommandType;
import io.netty.handler.codec.socksx.v5.Socks5PasswordAuthResponse;
import io.netty.handler.codec.socksx.v5.Socks5PasswordAuthResponseDecoder;
import io.netty.handler.codec.socksx.v5.Socks5PasswordAuthStatus;
import io.netty.handler.codec.socksx.v5.Socks5PrivateAuthResponse;
import io.netty.handler.codec.socksx.v5.Socks5PrivateAuthResponseDecoder;
import io.netty.handler.codec.socksx.v5.Socks5PrivateAuthStatus;
import io.netty.util.NetUtil;
import io.netty.util.internal.StringUtil;

import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Arrays;
import java.util.Collections;

/**
 * Handler that establishes a blind forwarding proxy tunnel using
 * <a href="https://www.rfc-editor.org/rfc/rfc1928">SOCKS Protocol Version 5</a>.
 */
public final class Socks5ProxyHandler extends ProxyHandler {

    private static final String PROTOCOL = "socks5";
    private static final String AUTH_PASSWORD = "password";
    private static final String AUTH_PRIVATE = "private";

    private static final byte NO_PRIVATE_AUTH_METHOD =
        Socks5AuthMethod.NO_AUTH.byteValue();
// ... (219 more lines)