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EpollServerSocketChannel.java
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EpollServerSocketChannel.java
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/*
* Copyright 2014 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:
*
* https://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.channel.epoll;
import io.netty.channel.Channel;
import io.netty.channel.EventLoop;
import io.netty.channel.socket.ServerSocketChannel;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import static io.netty.channel.epoll.LinuxSocket.newSocketStream;
import static io.netty.channel.epoll.Native.IS_SUPPORTING_TCP_FASTOPEN_SERVER;
import static io.netty.channel.unix.NativeInetAddress.address;
/**
* {@link ServerSocketChannel} implementation that uses linux EPOLL Edge-Triggered Mode for
* maximal performance.
*/
public final class EpollServerSocketChannel extends AbstractEpollServerChannel implements ServerSocketChannel {
private final EpollServerSocketChannelConfig config;
private volatile Collection<InetAddress> tcpMd5SigAddresses = Collections.emptyList();
public EpollServerSocketChannel() {
super(newSocketStream(), false);
config = new EpollServerSocketChannelConfig(this);
}
public EpollServerSocketChannel(int fd) {
// Must call this constructor to ensure this object's local address is configured correctly.
// The local address can only be obtained from a Socket object.
this(new LinuxSocket(fd));
}
EpollServerSocketChannel(LinuxSocket fd) {
super(fd);
config = new EpollServerSocketChannelConfig(this);
}
EpollServerSocketChannel(LinuxSocket fd, boolean active) {
super(fd, active);
config = new EpollServerSocketChannelConfig(this);
}
@Override
protected boolean isCompatible(EventLoop loop) {
return loop instanceof EpollEventLoop;
}
@Override
protected void doBind(SocketAddress localAddress) throws Exception {
super.doBind(localAddress);
final int tcpFastopen;
if (IS_SUPPORTING_TCP_FASTOPEN_SERVER && (tcpFastopen = config.getTcpFastopen()) > 0) {
socket.setTcpFastOpen(tcpFastopen);
}
socket.listen(config.getBacklog());
active = true;
}
@Override
public InetSocketAddress remoteAddress() {
return (InetSocketAddress) super.remoteAddress();
}
@Override
public InetSocketAddress localAddress() {
return (InetSocketAddress) super.localAddress();
}
@Override
public EpollServerSocketChannelConfig config() {
return config;
}
@Override
protected Channel newChildChannel(int fd, byte[] address, int offset, int len) throws Exception {
return new EpollSocketChannel(this, new LinuxSocket(fd), address(address, offset, len));
}
Collection<InetAddress> tcpMd5SigAddresses() {
return tcpMd5SigAddresses;
}
void setTcpMd5Sig(Map<InetAddress, byte[]> keys) throws IOException {
tcpMd5SigAddresses = TcpMd5Util.newTcpMd5Sigs(this, tcpMd5SigAddresses, keys);
}
}