250a09df63
Motivation: TCP Fast Open allows data to be carried in the SYN and SYN-ACK packets and consumed by the receiving end during the initial connection handshake, and saves up to one full round-trip time (RTT) compared to the standard TCP, which requires a three-way handshake (3WHS) to complete before data can be exchanged. This commit enables support for TFO on server sockets. Modifications: Added new Integer Option TCP_FASTOPEN in EpollChannelOption. Added getters/setters in EpollServerChannelConfig for TCP_FASTOPEN. Added way to check if TCP_FASTOPEN is supported on server in Native. Added setting on socket opt TCP_FASTOPEN if value is set on channel options in doBind in EpollServerSocketChannel. Enhanced EpollSocketTestPermutation to contain a permutation for server socket containing fast open. Result: Users of native-epoll can set TCP_FASTOPEN on server sockets and thus leverage fast connect features of RFC7413 if client is capable of it. Conflicts: transport-native-epoll/src/main/java/io/netty/channel/epoll/EpollChannelOption.java
226 lines
9.1 KiB
Java
226 lines
9.1 KiB
Java
/*
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* Copyright 2014 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.channel.epoll;
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import io.netty.bootstrap.Bootstrap;
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import io.netty.bootstrap.ServerBootstrap;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelFactory;
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import io.netty.channel.EventLoopGroup;
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import io.netty.channel.socket.InternetProtocolFamily;
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import io.netty.channel.socket.nio.NioDatagramChannel;
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import io.netty.channel.socket.nio.NioServerSocketChannel;
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import io.netty.channel.socket.nio.NioSocketChannel;
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import io.netty.channel.unix.DomainSocketAddress;
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import io.netty.testsuite.transport.TestsuitePermutation;
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import io.netty.testsuite.transport.TestsuitePermutation.BootstrapFactory;
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import io.netty.testsuite.transport.socket.SocketTestPermutation;
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import io.netty.util.concurrent.DefaultThreadFactory;
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import io.netty.util.internal.logging.InternalLogger;
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import io.netty.util.internal.logging.InternalLoggerFactory;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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class EpollSocketTestPermutation extends SocketTestPermutation {
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static final EpollSocketTestPermutation INSTANCE = new EpollSocketTestPermutation();
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static final EventLoopGroup EPOLL_BOSS_GROUP =
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new EpollEventLoopGroup(BOSSES, new DefaultThreadFactory("testsuite-epoll-boss", true));
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static final EventLoopGroup EPOLL_WORKER_GROUP =
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new EpollEventLoopGroup(WORKERS, new DefaultThreadFactory("testsuite-epoll-worker", true));
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private static final InternalLogger logger = InternalLoggerFactory.getInstance(EpollSocketTestPermutation.class);
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@Override
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public List<TestsuitePermutation.BootstrapComboFactory<ServerBootstrap, Bootstrap>> socket() {
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List<TestsuitePermutation.BootstrapComboFactory<ServerBootstrap, Bootstrap>> list =
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combo(serverSocket(), clientSocket());
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list.remove(list.size() - 1); // Exclude NIO x NIO test
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return list;
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}
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@SuppressWarnings("unchecked")
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@Override
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public List<BootstrapFactory<ServerBootstrap>> serverSocket() {
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List<BootstrapFactory<ServerBootstrap>> toReturn = new ArrayList<BootstrapFactory<ServerBootstrap>>();
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toReturn.add(new BootstrapFactory<ServerBootstrap>() {
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@Override
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public ServerBootstrap newInstance() {
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return new ServerBootstrap().group(EPOLL_BOSS_GROUP, EPOLL_WORKER_GROUP)
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.channel(EpollServerSocketChannel.class);
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}
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});
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if (isServerFastOpen()) {
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toReturn.add(new BootstrapFactory<ServerBootstrap>() {
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@Override
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public ServerBootstrap newInstance() {
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ServerBootstrap serverBootstrap = new ServerBootstrap().group(EPOLL_BOSS_GROUP, EPOLL_WORKER_GROUP)
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.channel(EpollServerSocketChannel.class);
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serverBootstrap.option(EpollChannelOption.TCP_FASTOPEN, 5);
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return serverBootstrap;
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}
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});
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}
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toReturn.add(new BootstrapFactory<ServerBootstrap>() {
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@Override
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public ServerBootstrap newInstance() {
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return new ServerBootstrap().group(nioBossGroup, nioWorkerGroup)
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.channel(NioServerSocketChannel.class);
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}
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});
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return toReturn;
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}
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@SuppressWarnings("unchecked")
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@Override
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public List<BootstrapFactory<Bootstrap>> clientSocket() {
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return Arrays.asList(
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new BootstrapFactory<Bootstrap>() {
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@Override
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public Bootstrap newInstance() {
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return new Bootstrap().group(EPOLL_WORKER_GROUP).channel(EpollSocketChannel.class);
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}
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},
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new BootstrapFactory<Bootstrap>() {
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@Override
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public Bootstrap newInstance() {
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return new Bootstrap().group(nioWorkerGroup).channel(NioSocketChannel.class);
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}
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}
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);
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}
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@Override
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public List<TestsuitePermutation.BootstrapComboFactory<Bootstrap, Bootstrap>> datagram() {
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// Make the list of Bootstrap factories.
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@SuppressWarnings("unchecked")
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List<BootstrapFactory<Bootstrap>> bfs = Arrays.asList(
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new BootstrapFactory<Bootstrap>() {
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@Override
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public Bootstrap newInstance() {
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return new Bootstrap().group(nioWorkerGroup).channelFactory(new ChannelFactory<Channel>() {
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@Override
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public Channel newChannel() {
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return new NioDatagramChannel(InternetProtocolFamily.IPv4);
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}
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@Override
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public String toString() {
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return NioDatagramChannel.class.getSimpleName() + ".class";
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}
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});
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}
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},
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new BootstrapFactory<Bootstrap>() {
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@Override
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public Bootstrap newInstance() {
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return new Bootstrap().group(EPOLL_WORKER_GROUP).channel(EpollDatagramChannel.class);
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}
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}
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);
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return combo(bfs, bfs);
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}
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public List<TestsuitePermutation.BootstrapComboFactory<ServerBootstrap, Bootstrap>> domainSocket() {
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List<TestsuitePermutation.BootstrapComboFactory<ServerBootstrap, Bootstrap>> list =
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combo(serverDomainSocket(), clientDomainSocket());
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return list;
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}
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public List<BootstrapFactory<ServerBootstrap>> serverDomainSocket() {
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return Collections.<BootstrapFactory<ServerBootstrap>>singletonList(
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new BootstrapFactory<ServerBootstrap>() {
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@Override
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public ServerBootstrap newInstance() {
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return new ServerBootstrap().group(EPOLL_BOSS_GROUP, EPOLL_WORKER_GROUP)
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.channel(EpollServerDomainSocketChannel.class);
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}
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}
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);
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}
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public List<BootstrapFactory<Bootstrap>> clientDomainSocket() {
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return Collections.<BootstrapFactory<Bootstrap>>singletonList(
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new BootstrapFactory<Bootstrap>() {
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@Override
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public Bootstrap newInstance() {
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return new Bootstrap().group(EPOLL_WORKER_GROUP).channel(EpollDomainSocketChannel.class);
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}
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}
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);
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}
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public boolean isServerFastOpen() {
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return AccessController.doPrivileged(new PrivilegedAction<Integer>() {
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@Override
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public Integer run() {
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int fastopen = 0;
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File file = new File("/proc/sys/net/ipv4/tcp_fastopen");
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if (file.exists()) {
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BufferedReader in = null;
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try {
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in = new BufferedReader(new FileReader(file));
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fastopen = Integer.parseInt(in.readLine());
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if (logger.isDebugEnabled()) {
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logger.debug("{}: {}", file, fastopen);
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}
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} catch (Exception e) {
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logger.debug("Failed to get TCP_FASTOPEN from: {}", file, e);
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} finally {
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if (in != null) {
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try {
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in.close();
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} catch (Exception e) {
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// Ignored.
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}
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}
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}
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} else {
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if (logger.isDebugEnabled()) {
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logger.debug("{}: {} (non-existent)", file, fastopen);
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}
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}
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return fastopen;
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}
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}) == 3;
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}
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public static DomainSocketAddress newSocketAddress() {
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try {
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File file = File.createTempFile("netty", "dsocket");
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file.delete();
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return new DomainSocketAddress(file);
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} catch (IOException e) {
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throw new IllegalStateException(e);
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}
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}
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}
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