/*
* 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:
*
* 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.channel.epoll;
import io.netty.buffer.ByteBufAllocator;
import io.netty.channel.ChannelException;
import io.netty.channel.ChannelOption;
import io.netty.channel.MessageSizeEstimator;
import io.netty.channel.RecvByteBufAllocator;
import io.netty.channel.WriteBufferWaterMark;
import io.netty.channel.socket.ServerSocketChannelConfig;
import java.io.IOException;
import java.net.InetAddress;
import java.util.Map;
public final class EpollServerSocketChannelConfig extends EpollServerChannelConfig
implements ServerSocketChannelConfig {
EpollServerSocketChannelConfig(EpollServerSocketChannel channel) {
super(channel);
// Use SO_REUSEADDR by default as java.nio does the same.
//
// See https://github.com/netty/netty/issues/2605
setReuseAddress(true);
}
@Override
public Map<ChannelOption<?>, Object> getOptions() {
return getOptions(super.getOptions(), EpollChannelOption.SO_REUSEPORT, EpollChannelOption.IP_FREEBIND,
EpollChannelOption.TCP_DEFER_ACCEPT);
}
@SuppressWarnings("unchecked")
@Override
public <T> T getOption(ChannelOption<T> option) {
if (option == EpollChannelOption.SO_REUSEPORT) {
return (T) Boolean.valueOf(isReusePort());
}
if (option == EpollChannelOption.IP_FREEBIND) {
return (T) Boolean.valueOf(isFreeBind());
}
if (option == EpollChannelOption.TCP_DEFER_ACCEPT) {
return (T) Integer.valueOf(getTcpDeferAccept());
}
return super.getOption(option);
}
@Override
public <T> boolean setOption(ChannelOption<T> option, T value) {
validate(option, value);
if (option == EpollChannelOption.SO_REUSEPORT) {
setReusePort((Boolean) value);
} else if (option == EpollChannelOption.IP_FREEBIND) {
setFreeBind((Boolean) value);
} else if (option == EpollChannelOption.TCP_MD5SIG) {
@SuppressWarnings("unchecked")
final Map<InetAddress, byte[]> m = (Map<InetAddress, byte[]>) value;
setTcpMd5Sig(m);
} else if (option == EpollChannelOption.TCP_DEFER_ACCEPT) {
setTcpDeferAccept((Integer) value);
} else {
return super.setOption(option, value);
}
return true;
}
@Override
public EpollServerSocketChannelConfig setReuseAddress(boolean reuseAddress) {
super.setReuseAddress(reuseAddress);
return this;
}
@Override
public EpollServerSocketChannelConfig setReceiveBufferSize(int receiveBufferSize) {
super.setReceiveBufferSize(receiveBufferSize);
return this;
}
@Override
public EpollServerSocketChannelConfig setPerformancePreferences(int connectionTime, int latency, int bandwidth) {
return this;
}
@Override
public EpollServerSocketChannelConfig setBacklog(int backlog) {
super.setBacklog(backlog);
return this;
}
@Override
public EpollServerSocketChannelConfig setConnectTimeoutMillis(int connectTimeoutMillis) {
super.setConnectTimeoutMillis(connectTimeoutMillis);
return this;
}
@Override
@Deprecated
public EpollServerSocketChannelConfig setMaxMessagesPerRead(int maxMessagesPerRead) {
super.setMaxMessagesPerRead(maxMessagesPerRead);
return this;
}
@Override
public EpollServerSocketChannelConfig setWriteSpinCount(int writeSpinCount) {
super.setWriteSpinCount(writeSpinCount);
return this;
}
@Override
public EpollServerSocketChannelConfig setAllocator(ByteBufAllocator allocator) {
super.setAllocator(allocator);
return this;
}
@Override
public EpollServerSocketChannelConfig setRecvByteBufAllocator(RecvByteBufAllocator allocator) {
super.setRecvByteBufAllocator(allocator);
return this;
}
@Override
public EpollServerSocketChannelConfig setAutoRead(boolean autoRead) {
super.setAutoRead(autoRead);
return this;
}
@Override
@Deprecated
public EpollServerSocketChannelConfig setWriteBufferHighWaterMark(int writeBufferHighWaterMark) {
super.setWriteBufferHighWaterMark(writeBufferHighWaterMark);
return this;
}
@Override
@Deprecated
public EpollServerSocketChannelConfig setWriteBufferLowWaterMark(int writeBufferLowWaterMark) {
super.setWriteBufferLowWaterMark(writeBufferLowWaterMark);
return this;
}
@Override
public EpollServerSocketChannelConfig setWriteBufferWaterMark(WriteBufferWaterMark writeBufferWaterMark) {
super.setWriteBufferWaterMark(writeBufferWaterMark);
return this;
}
@Override
public EpollServerSocketChannelConfig setMessageSizeEstimator(MessageSizeEstimator estimator) {
super.setMessageSizeEstimator(estimator);
return this;
}
/**
* Set the {@code TCP_MD5SIG} option on the socket. See {@code linux/tcp.h} for more details.
* Keys can only be set on, not read to prevent a potential leak, as they are confidential.
* Allowing them being read would mean anyone with access to the channel could get them.
*/
public EpollServerSocketChannelConfig setTcpMd5Sig(Map<InetAddress, byte[]> keys) {
try {
((EpollServerSocketChannel) channel).setTcpMd5Sig(keys);
return this;
} catch (IOException e) {
throw new ChannelException(e);
}
}
/**
* Returns {@code true} if the SO_REUSEPORT option is set.
*/
public boolean isReusePort() {
try {
return channel.socket.isReusePort();
} catch (IOException e) {
throw new ChannelException(e);
}
}
/**
* Set the SO_REUSEPORT option on the underlying Channel. This will allow to bind multiple
* {@link EpollSocketChannel}s to the same port and so accept connections with multiple threads.
*
* Be aware this method needs be called before {@link EpollSocketChannel#bind(java.net.SocketAddress)} to have
* any affect.
*/
public EpollServerSocketChannelConfig setReusePort(boolean reusePort) {
try {
channel.socket.setReusePort(reusePort);
return this;
} catch (IOException e) {
throw new ChannelException(e);
}
}
/**
* Returns {@code true} if <a href="http://man7.org/linux/man-pages/man7/ip.7.html">IP_FREEBIND</a> is enabled,
* {@code false} otherwise.
*/
public boolean isFreeBind() {
try {
return channel.socket.isIpFreeBind();
} catch (IOException e) {
throw new ChannelException(e);
}
}
/**
* If {@code true} is used <a href="http://man7.org/linux/man-pages/man7/ip.7.html">IP_FREEBIND</a> is enabled,
* {@code false} for disable it. Default is disabled.
*/
public EpollServerSocketChannelConfig setFreeBind(boolean freeBind) {
try {
channel.socket.setIpFreeBind(freeBind);
return this;
} catch (IOException e) {
throw new ChannelException(e);
}
}
/**
* Set the {@code TCP_DEFER_ACCEPT} option on the socket. See {@code man 7 tcp} for more details.
*/
public EpollServerSocketChannelConfig setTcpDeferAccept(int deferAccept) {
try {
channel.socket.setTcpDeferAccept(deferAccept);
return this;
} catch (IOException e) {
throw new ChannelException(e);
}
}
/**
* Returns a positive value if <a href="http://linux.die.net/man/7/tcp">TCP_DEFER_ACCEPT</a> is enabled.
*/
public int getTcpDeferAccept() {
try {
return channel.socket.getTcpDeferAccept();
} catch (IOException e) {
throw new ChannelException(e);
}
}
}