/*
* Copyright 2012 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:
*
* http://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.example.socksproxy;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.socks.SocksAuthResponse;
import io.netty.handler.codec.socks.SocksAuthScheme;
import io.netty.handler.codec.socks.SocksAuthStatus;
import io.netty.handler.codec.socks.SocksCmdRequest;
import io.netty.handler.codec.socks.SocksCmdRequestDecoder;
import io.netty.handler.codec.socks.SocksCmdType;
import io.netty.handler.codec.socks.SocksInitResponse;
import io.netty.handler.codec.socks.SocksRequest;
@ChannelHandler.Sharable
public final class SocksServerHandler extends SimpleChannelInboundHandler<SocksRequest> {
@Override
public void channelRead0(ChannelHandlerContext ctx, SocksRequest socksRequest) throws Exception {
switch (socksRequest.requestType()) {
case INIT: {
// auth support example
//ctx.pipeline().addFirst(new SocksAuthRequestDecoder());
//ctx.write(new SocksInitResponse(SocksAuthScheme.AUTH_PASSWORD));
ctx.pipeline().addFirst(new SocksCmdRequestDecoder());
ctx.write(new SocksInitResponse(SocksAuthScheme.NO_AUTH));
break;
}
case AUTH:
ctx.pipeline().addFirst(new SocksCmdRequestDecoder());
ctx.write(new SocksAuthResponse(SocksAuthStatus.SUCCESS));
break;
case CMD:
SocksCmdRequest req = (SocksCmdRequest) socksRequest;
if (req.cmdType() == SocksCmdType.CONNECT) {
ctx.pipeline().addLast(new SocksServerConnectHandler());
ctx.pipeline().remove(this);
ctx.fireChannelRead(socksRequest);
} else {
ctx.close();
}
break;
case UNKNOWN:
ctx.close();
break;
}
}
@Override
public void channelReadComplete(ChannelHandlerContext ctx) {
ctx.flush();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable throwable) {
throwable.printStackTrace();
SocksServerUtils.closeOnFlush(ctx.channel());
}
}