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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.ipc;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.nio.ByteBuffer;</span> |
| <span class="source-line-no">021</span><span id="line-21">import org.apache.hadoop.hbase.ipc.ServerRpcConnection.PreambleResponse;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.util.NettyFutureUtils;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">024</span><span id="line-24"></span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hbase.thirdparty.io.netty.buffer.ByteBuf;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hbase.thirdparty.io.netty.channel.ChannelHandlerContext;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hbase.thirdparty.io.netty.channel.ChannelPipeline;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hbase.thirdparty.io.netty.channel.SimpleChannelInboundHandler;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hbase.thirdparty.io.netty.handler.codec.FixedLengthFrameDecoder;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hbase.thirdparty.io.netty.handler.codec.LengthFieldBasedFrameDecoder;</span> |
| <span class="source-line-no">031</span><span id="line-31"></span> |
| <span class="source-line-no">032</span><span id="line-32">/**</span> |
| <span class="source-line-no">033</span><span id="line-33"> * Handle connection preamble.</span> |
| <span class="source-line-no">034</span><span id="line-34"> * @since 2.0.0`</span> |
| <span class="source-line-no">035</span><span id="line-35"> */</span> |
| <span class="source-line-no">036</span><span id="line-36">@InterfaceAudience.Private</span> |
| <span class="source-line-no">037</span><span id="line-37">class NettyRpcServerPreambleHandler extends SimpleChannelInboundHandler<ByteBuf> {</span> |
| <span class="source-line-no">038</span><span id="line-38"></span> |
| <span class="source-line-no">039</span><span id="line-39"> static final String DECODER_NAME = "preambleDecoder";</span> |
| <span class="source-line-no">040</span><span id="line-40"></span> |
| <span class="source-line-no">041</span><span id="line-41"> private final NettyRpcServer rpcServer;</span> |
| <span class="source-line-no">042</span><span id="line-42"> private final NettyServerRpcConnection conn;</span> |
| <span class="source-line-no">043</span><span id="line-43"> private boolean processPreambleError;</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45"> public NettyRpcServerPreambleHandler(NettyRpcServer rpcServer, NettyServerRpcConnection conn) {</span> |
| <span class="source-line-no">046</span><span id="line-46"> this.rpcServer = rpcServer;</span> |
| <span class="source-line-no">047</span><span id="line-47"> this.conn = conn;</span> |
| <span class="source-line-no">048</span><span id="line-48"> }</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> static FixedLengthFrameDecoder createDecoder() {</span> |
| <span class="source-line-no">051</span><span id="line-51"> FixedLengthFrameDecoder preambleDecoder = new FixedLengthFrameDecoder(6);</span> |
| <span class="source-line-no">052</span><span id="line-52"> preambleDecoder.setSingleDecode(true);</span> |
| <span class="source-line-no">053</span><span id="line-53"> return preambleDecoder;</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> @Override</span> |
| <span class="source-line-no">057</span><span id="line-57"> protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception {</span> |
| <span class="source-line-no">058</span><span id="line-58"> if (processPreambleError) {</span> |
| <span class="source-line-no">059</span><span id="line-59"> // if we failed to process preamble, we will close the connection immediately, but it is</span> |
| <span class="source-line-no">060</span><span id="line-60"> // possible that we have already received some bytes after the 'preamble' so when closing, the</span> |
| <span class="source-line-no">061</span><span id="line-61"> // netty framework will still pass them here. So we set a flag here to just skip processing</span> |
| <span class="source-line-no">062</span><span id="line-62"> // these broken messages.</span> |
| <span class="source-line-no">063</span><span id="line-63"> return;</span> |
| <span class="source-line-no">064</span><span id="line-64"> }</span> |
| <span class="source-line-no">065</span><span id="line-65"> ByteBuffer buf = ByteBuffer.allocate(msg.readableBytes());</span> |
| <span class="source-line-no">066</span><span id="line-66"> msg.readBytes(buf);</span> |
| <span class="source-line-no">067</span><span id="line-67"> buf.flip();</span> |
| <span class="source-line-no">068</span><span id="line-68"> PreambleResponse resp = conn.processPreamble(buf);</span> |
| <span class="source-line-no">069</span><span id="line-69"> if (resp == PreambleResponse.CLOSE) {</span> |
| <span class="source-line-no">070</span><span id="line-70"> processPreambleError = true;</span> |
| <span class="source-line-no">071</span><span id="line-71"> conn.close();</span> |
| <span class="source-line-no">072</span><span id="line-72"> return;</span> |
| <span class="source-line-no">073</span><span id="line-73"> }</span> |
| <span class="source-line-no">074</span><span id="line-74"> if (resp == PreambleResponse.CONTINUE) {</span> |
| <span class="source-line-no">075</span><span id="line-75"> // we use a single decode decoder, so here we need to replace it with a new one so it will</span> |
| <span class="source-line-no">076</span><span id="line-76"> // decode a new preamble header again</span> |
| <span class="source-line-no">077</span><span id="line-77"> ctx.pipeline().replace(DECODER_NAME, DECODER_NAME, createDecoder());</span> |
| <span class="source-line-no">078</span><span id="line-78"> return;</span> |
| <span class="source-line-no">079</span><span id="line-79"> }</span> |
| <span class="source-line-no">080</span><span id="line-80"> // resp == PreambleResponse.SUCCEED</span> |
| <span class="source-line-no">081</span><span id="line-81"> ChannelPipeline p = ctx.pipeline();</span> |
| <span class="source-line-no">082</span><span id="line-82"> if (conn.useSasl) {</span> |
| <span class="source-line-no">083</span><span id="line-83"> LengthFieldBasedFrameDecoder decoder =</span> |
| <span class="source-line-no">084</span><span id="line-84"> new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE, 0, 4, 0, 4);</span> |
| <span class="source-line-no">085</span><span id="line-85"> decoder.setSingleDecode(true);</span> |
| <span class="source-line-no">086</span><span id="line-86"> p.addBefore(NettyRpcServerResponseEncoder.NAME, NettyHBaseSaslRpcServerHandler.DECODER_NAME,</span> |
| <span class="source-line-no">087</span><span id="line-87"> decoder).addBefore(NettyRpcServerResponseEncoder.NAME, null,</span> |
| <span class="source-line-no">088</span><span id="line-88"> new NettyHBaseSaslRpcServerHandler(rpcServer, conn));</span> |
| <span class="source-line-no">089</span><span id="line-89"> } else {</span> |
| <span class="source-line-no">090</span><span id="line-90"> conn.setupHandler();</span> |
| <span class="source-line-no">091</span><span id="line-91"> }</span> |
| <span class="source-line-no">092</span><span id="line-92"> // add first and then remove, so the single decode decoder will pass the remaining bytes to the</span> |
| <span class="source-line-no">093</span><span id="line-93"> // handler above.</span> |
| <span class="source-line-no">094</span><span id="line-94"> p.remove(this);</span> |
| <span class="source-line-no">095</span><span id="line-95"> p.remove(DECODER_NAME);</span> |
| <span class="source-line-no">096</span><span id="line-96"> }</span> |
| <span class="source-line-no">097</span><span id="line-97"></span> |
| <span class="source-line-no">098</span><span id="line-98"> @Override</span> |
| <span class="source-line-no">099</span><span id="line-99"> public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {</span> |
| <span class="source-line-no">100</span><span id="line-100"> NettyRpcServer.LOG.warn("Connection {}; caught unexpected downstream exception.",</span> |
| <span class="source-line-no">101</span><span id="line-101"> ctx.channel().remoteAddress(), cause);</span> |
| <span class="source-line-no">102</span><span id="line-102"> NettyFutureUtils.safeClose(ctx);</span> |
| <span class="source-line-no">103</span><span id="line-103"> }</span> |
| <span class="source-line-no">104</span><span id="line-104">}</span> |
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| </pre> |
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