/*
* 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.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import io.netty.channel.ChannelOption;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.socks.SocksCmdRequest;
import io.netty.handler.codec.socks.SocksCmdResponse;
import io.netty.handler.codec.socks.SocksCmdStatus;
@ChannelHandler.Sharable
public final class SocksServerConnectHandler extends ChannelInboundMessageHandlerAdapter<SocksCmdRequest> {
private static final String name = "SOCKS_SERVER_CONNECT_HANDLER";
public static String getName() {
return name;
}
private final Bootstrap b = new Bootstrap();
@Override
public void messageReceived(final ChannelHandlerContext ctx, final SocksCmdRequest request) throws Exception {
CallbackNotifier cb = new CallbackNotifier() {
@Override
public void onSuccess(final ChannelHandlerContext outboundCtx) {
ctx.channel().write(new SocksCmdResponse(SocksCmdStatus.SUCCESS, request.addressType()))
.addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture channelFuture) throws Exception {
ctx.pipeline().remove(getName());
outboundCtx.channel().pipeline().addLast(new RelayHandler(ctx.channel()));
ctx.channel().pipeline().addLast(new RelayHandler(outboundCtx.channel()));
}
});
}
@Override
public void onFailure(ChannelHandlerContext outboundCtx, Throwable cause) {
ctx.channel().write(new SocksCmdResponse(SocksCmdStatus.FAILURE, request.addressType()));
SocksServerUtils.closeOnFlush(ctx.channel());
}
};
final Channel inboundChannel = ctx.channel();
b.group(inboundChannel.eventLoop())
.channel(NioSocketChannel.class)
.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000)
.option(ChannelOption.SO_KEEPALIVE, true)
.handler(new DirectClientInitializer(cb));
b.connect(request.host(), request.port());
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
SocksServerUtils.closeOnFlush(ctx.channel());
}
}