b57d9f307f
- write() now accepts a ChannelPromise and returns ChannelFuture as most users expected. It makes the user's life much easier because it is now much easier to get notified when a specific message has been written. - flush() does not create a ChannelPromise nor returns ChannelFuture. It is now similar to what read() looks like.
79 lines
3.2 KiB
Java
79 lines
3.2 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.example.socksproxy;
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import io.netty.bootstrap.Bootstrap;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandler;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelOption;
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import io.netty.channel.SimpleChannelInboundHandler;
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import io.netty.channel.socket.nio.NioSocketChannel;
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import io.netty.handler.codec.socks.SocksCmdRequest;
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import io.netty.handler.codec.socks.SocksCmdResponse;
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import io.netty.handler.codec.socks.SocksCmdStatus;
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@ChannelHandler.Sharable
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public final class SocksServerConnectHandler extends SimpleChannelInboundHandler<SocksCmdRequest> {
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private static final String name = "SOCKS_SERVER_CONNECT_HANDLER";
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public static String getName() {
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return name;
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}
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private final Bootstrap b = new Bootstrap();
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@Override
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public void channelRead0(final ChannelHandlerContext ctx, final SocksCmdRequest request) throws Exception {
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CallbackNotifier cb = new CallbackNotifier() {
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@Override
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public void onSuccess(final ChannelHandlerContext outboundCtx) {
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ctx.channel().writeAndFlush(new SocksCmdResponse(SocksCmdStatus.SUCCESS, request.addressType()))
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.addListener(new ChannelFutureListener() {
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@Override
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public void operationComplete(ChannelFuture channelFuture) throws Exception {
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ctx.pipeline().remove(getName());
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outboundCtx.channel().pipeline().addLast(new RelayHandler(ctx.channel()));
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ctx.channel().pipeline().addLast(new RelayHandler(outboundCtx.channel()));
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}
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});
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}
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@Override
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public void onFailure(ChannelHandlerContext outboundCtx, Throwable cause) {
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ctx.channel().write(new SocksCmdResponse(SocksCmdStatus.FAILURE, request.addressType()));
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SocksServerUtils.closeOnFlush(ctx.channel());
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}
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};
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final Channel inboundChannel = ctx.channel();
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b.group(inboundChannel.eventLoop())
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.channel(NioSocketChannel.class)
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.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000)
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.option(ChannelOption.SO_KEEPALIVE, true)
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.handler(new DirectClientInitializer(cb));
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b.connect(request.host(), request.port());
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
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SocksServerUtils.closeOnFlush(ctx.channel());
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}
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}
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