/*
* Copyright 2011 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.sctp.nio;
import com.sun.nio.sctp.SctpChannel;
import com.sun.nio.sctp.SctpServerChannel;
import io.netty.buffer.BufType;
import io.netty.buffer.MessageBuf;
import io.netty.channel.ChannelException;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelMetadata;
import io.netty.channel.ChannelPromise;
import io.netty.channel.nio.AbstractNioMessageChannel;
import io.netty.channel.sctp.DefaultSctpServerChannelConfig;
import io.netty.channel.sctp.SctpServerChannelConfig;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.channels.SelectionKey;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
/**
* {@link io.netty.channel.sctp.SctpServerChannel} implementation which use non-blocking mode to accept new
* connections and create the {@link NioSctpChannel} for them.
*
* Be aware that not all operations systems support SCTP. Please refer to the documentation of your operation system,
* to understand what you need to do to use it. Also this feature is only supported on Java 7+.
*/
public class NioSctpServerChannel extends AbstractNioMessageChannel
implements io.netty.channel.sctp.SctpServerChannel {
private static final ChannelMetadata METADATA = new ChannelMetadata(BufType.MESSAGE, false);
private static SctpServerChannel newSocket() {
try {
return SctpServerChannel.open();
} catch (IOException e) {
throw new ChannelException(
"Failed to open a server socket.", e);
}
}
private final SctpServerChannelConfig config;
/**
* Create a new instance
*/
public NioSctpServerChannel() {
super(null, null, newSocket(), SelectionKey.OP_ACCEPT);
config = new DefaultSctpServerChannelConfig(this, javaChannel());
}
@Override
public ChannelMetadata metadata() {
return METADATA;
}
@Override
public Set<InetSocketAddress> allLocalAddresses() {
try {
final Set<SocketAddress> allLocalAddresses = javaChannel().getAllLocalAddresses();
final Set<InetSocketAddress> addresses = new LinkedHashSet<InetSocketAddress>(allLocalAddresses.size());
for (SocketAddress socketAddress : allLocalAddresses) {
addresses.add((InetSocketAddress) socketAddress);
}
return addresses;
} catch (Throwable t) {
return Collections.emptySet();
}
}
@Override
public SctpServerChannelConfig config() {
return config;
}
@Override
public boolean isActive() {
return isOpen() && !allLocalAddresses().isEmpty();
}
@Override
public InetSocketAddress remoteAddress() {
return null;
}
@Override
public InetSocketAddress localAddress() {
return (InetSocketAddress) super.localAddress();
}
@Override
protected SctpServerChannel javaChannel() {
return (SctpServerChannel) super.javaChannel();
}
@Override
protected SocketAddress localAddress0() {
try {
Iterator<SocketAddress> i = javaChannel().getAllLocalAddresses().iterator();
if (i.hasNext()) {
return i.next();
}
} catch (IOException e) {
// ignore
}
return null;
}
@Override
protected void doBind(SocketAddress localAddress) throws Exception {
javaChannel().bind(localAddress, config.getBacklog());
}
@Override
protected void doClose() throws Exception {
javaChannel().close();
}
@Override
protected int doReadMessages(MessageBuf<Object> buf) throws Exception {
SctpChannel ch = javaChannel().accept();
if (ch == null) {
return 0;
}
buf.add(new NioSctpChannel(this, null, ch));
return 1;
}
@Override
public ChannelFuture bindAddress(InetAddress localAddress) {
return bindAddress(localAddress, newPromise());
}
@Override
public ChannelFuture bindAddress(final InetAddress localAddress, final ChannelPromise promise) {
if (eventLoop().inEventLoop()) {
try {
javaChannel().bindAddress(localAddress);
promise.setSuccess();
} catch (Throwable t) {
promise.setFailure(t);
}
} else {
eventLoop().execute(new Runnable() {
@Override
public void run() {
bindAddress(localAddress, promise);
}
});
}
return promise;
}
@Override
public ChannelFuture unbindAddress(InetAddress localAddress) {
return unbindAddress(localAddress, newPromise());
}
@Override
public ChannelFuture unbindAddress(final InetAddress localAddress, final ChannelPromise promise) {
if (eventLoop().inEventLoop()) {
try {
javaChannel().unbindAddress(localAddress);
promise.setSuccess();
} catch (Throwable t) {
promise.setFailure(t);
}
} else {
eventLoop().execute(new Runnable() {
@Override
public void run() {
unbindAddress(localAddress, promise);
}
});
}
return promise;
}
// Unnecessary stuff
@Override
protected boolean doConnect(
SocketAddress remoteAddress, SocketAddress localAddress) throws Exception {
throw new UnsupportedOperationException();
}
@Override
protected void doFinishConnect() throws Exception {
throw new UnsupportedOperationException();
}
@Override
protected SocketAddress remoteAddress0() {
return null;
}
@Override
protected void doDisconnect() throws Exception {
throw new UnsupportedOperationException();
}
@Override
protected int doWriteMessages(MessageBuf<Object> buf, boolean lastSpin) throws Exception {
throw new UnsupportedOperationException();
}
}