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/*
* Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.protocol.bgp.rib.impl;
import static java.util.Objects.requireNonNull;
import com.google.common.annotations.VisibleForTesting;
import io.netty.bootstrap.Bootstrap;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.PooledByteBufAllocator;
import io.netty.channel.AdaptiveRecvByteBufAllocator;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.RecvByteBufAllocator;
import io.netty.channel.WriteBufferWaterMark;
import io.netty.channel.epoll.Epoll;
import io.netty.channel.epoll.EpollChannelOption;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.epoll.EpollMode;
import io.netty.channel.epoll.EpollServerSocketChannel;
import io.netty.channel.epoll.EpollSocketChannel;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.util.concurrent.DefaultPromise;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GlobalEventExecutor;
import io.netty.util.concurrent.Promise;
import java.net.InetSocketAddress;
import java.util.concurrent.TimeUnit;
import javax.annotation.PreDestroy;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.opendaylight.protocol.bgp.parser.spi.BGPExtensionConsumerContext;
import org.opendaylight.protocol.bgp.rib.impl.protocol.BGPProtocolSessionPromise;
import org.opendaylight.protocol.bgp.rib.impl.protocol.BGPReconnectPromise;
import org.opendaylight.protocol.bgp.rib.impl.spi.BGPDispatcher;
import org.opendaylight.protocol.bgp.rib.impl.spi.BGPPeerRegistry;
import org.opendaylight.protocol.bgp.rib.impl.spi.ChannelPipelineInitializer;
import org.opendaylight.protocol.bgp.rib.spi.BGPSession;
import org.opendaylight.protocol.bgp.rib.spi.BGPSessionNegotiatorFactory;
import org.opendaylight.protocol.concepts.KeyMapping;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implementation of BGPDispatcher.
*/
@Singleton
@Component(immediate = true, service = BGPDispatcher.class)
public final class BGPDispatcherImpl implements BGPDispatcher, AutoCloseable {
private static final Logger LOG = LoggerFactory.getLogger(BGPDispatcherImpl.class);
private static final int SOCKET_BACKLOG_SIZE = 128;
private static final long TIMEOUT = 10;
private static final WriteBufferWaterMark WATER_MARK = new WriteBufferWaterMark(128 * 1024, 256 * 1024);
// An adaptive allocator, so we size our message buffers based on what we receive, but make sure we process one
// message at a time. This should be good enough for most cases, although we could optimize it a bit based on
// whether we actually negotiate use of large messages -- based on that the range of allocations can be constrained
// from the default 64-65536 range to 64-4096.
private static final RecvByteBufAllocator RECV_ALLOCATOR = new AdaptiveRecvByteBufAllocator().maxMessagesPerRead(1);
private final BGPHandlerFactory handlerFactory;
private final EventLoopGroup bossGroup;
private final EventLoopGroup workerGroup;
private final BGPPeerRegistry bgpPeerRegistry;
@Inject
@Activate
public BGPDispatcherImpl(@Reference final BGPExtensionConsumerContext extensions,
@Reference(target = "(type=global-boss-group)") final EventLoopGroup bossGroup,
@Reference(target = "(type=global-worker-group)") final EventLoopGroup workerGroup,
@Reference final BGPPeerRegistry bgpPeerRegistry) {
if (Epoll.isAvailable()) {
this.bossGroup = new EpollEventLoopGroup();
this.workerGroup = new EpollEventLoopGroup();
} else {
this.bossGroup = requireNonNull(bossGroup);
this.workerGroup = requireNonNull(workerGroup);
}
this.bgpPeerRegistry = requireNonNull(bgpPeerRegistry);
handlerFactory = new BGPHandlerFactory(extensions.getMessageRegistry());
}
@VisibleForTesting
public synchronized Future createClient(final InetSocketAddress localAddress,
final InetSocketAddress remoteAddress, final int retryTimer, final boolean reuseAddress) {
final Bootstrap clientBootStrap = createClientBootStrap(KeyMapping.of(), reuseAddress, localAddress);
final BGPClientSessionNegotiatorFactory snf = new BGPClientSessionNegotiatorFactory(bgpPeerRegistry);
final ChannelPipelineInitializer initializer = BGPChannel.createChannelPipelineInitializer(
handlerFactory, snf);
final BGPProtocolSessionPromise sessionPromise = new BGPProtocolSessionPromise<>(remoteAddress,
retryTimer, clientBootStrap, bgpPeerRegistry);
clientBootStrap.handler(BGPChannel.createClientChannelHandler(initializer, sessionPromise));
sessionPromise.connect();
LOG.debug("Client created.");
return sessionPromise;
}
private synchronized Bootstrap createClientBootStrap(final KeyMapping keys, final boolean reuseAddress,
final InetSocketAddress localAddress) {
final Bootstrap bootstrap = new Bootstrap();
if (Epoll.isAvailable()) {
bootstrap.channel(EpollSocketChannel.class);
bootstrap.option(EpollChannelOption.EPOLL_MODE, EpollMode.LEVEL_TRIGGERED);
} else {
bootstrap.channel(NioSocketChannel.class);
}
if (keys != null && !keys.isEmpty()) {
if (Epoll.isAvailable()) {
bootstrap.option(EpollChannelOption.TCP_MD5SIG, keys.asMap());
} else {
throw new UnsupportedOperationException(Epoll.unavailabilityCause().getCause());
}
}
// Make sure we are doing round-robin processing
bootstrap.option(ChannelOption.RCVBUF_ALLOCATOR, RECV_ALLOCATOR);
bootstrap.option(ChannelOption.SO_KEEPALIVE, Boolean.TRUE);
bootstrap.option(ChannelOption.WRITE_BUFFER_WATER_MARK, WATER_MARK);
bootstrap.option(ChannelOption.SO_REUSEADDR, reuseAddress);
if (bootstrap.config().group() == null) {
bootstrap.group(workerGroup);
}
bootstrap.localAddress(localAddress);
return bootstrap;
}
@Deactivate
@PreDestroy
@Override
public synchronized void close() {
if (Epoll.isAvailable()) {
LOG.debug("Closing Dispatcher");
workerGroup.shutdownGracefully(0, TIMEOUT, TimeUnit.SECONDS);
bossGroup.shutdownGracefully(0, TIMEOUT, TimeUnit.SECONDS);
}
}
@Override
public synchronized Future createReconnectingClient(final InetSocketAddress remoteAddress,
final InetSocketAddress localAddress, final int retryTimer, final KeyMapping keys) {
return createReconnectingClient(remoteAddress, retryTimer, keys, localAddress, false);
}
@VisibleForTesting
synchronized Future createReconnectingClient(final InetSocketAddress remoteAddress,
final int retryTimer, final KeyMapping keys, final InetSocketAddress localAddress,
final boolean reuseAddress) {
final BGPClientSessionNegotiatorFactory snf = new BGPClientSessionNegotiatorFactory(bgpPeerRegistry);
final Bootstrap bootstrap = createClientBootStrap(keys, reuseAddress, localAddress);
final BGPReconnectPromise reconnectPromise = new BGPReconnectPromise<>(GlobalEventExecutor.INSTANCE,
remoteAddress, retryTimer, bootstrap, bgpPeerRegistry,
BGPChannel.createChannelPipelineInitializer(handlerFactory, snf));
reconnectPromise.connect();
return reconnectPromise;
}
@Override
public synchronized ChannelFuture createServer(final InetSocketAddress serverAddress) {
final BGPServerSessionNegotiatorFactory snf = new BGPServerSessionNegotiatorFactory(bgpPeerRegistry);
final ChannelPipelineInitializer initializer = BGPChannel.createChannelPipelineInitializer(
handlerFactory, snf);
final ServerBootstrap serverBootstrap = createServerBootstrap(initializer);
final ChannelFuture channelFuture = serverBootstrap.bind(serverAddress);
LOG.debug("Initiated server {} at {}.", channelFuture, serverAddress);
return channelFuture;
}
@Override
public BGPPeerRegistry getBGPPeerRegistry() {
return bgpPeerRegistry;
}
private synchronized ServerBootstrap createServerBootstrap(final ChannelPipelineInitializer initializer) {
final ServerBootstrap serverBootstrap = new ServerBootstrap();
if (Epoll.isAvailable()) {
serverBootstrap.channel(EpollServerSocketChannel.class);
serverBootstrap.childOption(EpollChannelOption.EPOLL_MODE, EpollMode.LEVEL_TRIGGERED);
} else {
serverBootstrap.channel(NioServerSocketChannel.class);
}
final ChannelHandler serverChannelHandler = BGPChannel.createServerChannelHandler(initializer);
serverBootstrap.childHandler(serverChannelHandler);
serverBootstrap.option(ChannelOption.SO_BACKLOG, SOCKET_BACKLOG_SIZE);
serverBootstrap.childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
serverBootstrap.childOption(ChannelOption.WRITE_BUFFER_WATER_MARK, WATER_MARK);
// Make sure we are doing round-robin processing
serverBootstrap.option(ChannelOption.RCVBUF_ALLOCATOR, RECV_ALLOCATOR);
if (serverBootstrap.config().group() == null) {
serverBootstrap.group(bossGroup, workerGroup);
}
return serverBootstrap;
}
private static final class BGPChannel {
private static final String NEGOTIATOR = "negotiator";
private BGPChannel() {
}
static > ChannelPipelineInitializer
createChannelPipelineInitializer(final BGPHandlerFactory hf, final T snf) {
return (channel, promise) -> {
channel.pipeline().addLast(hf.getDecoders());
channel.pipeline().addLast(NEGOTIATOR, snf.getSessionNegotiator(channel, promise));
channel.pipeline().addLast(hf.getEncoders());
};
}
static ChannelHandler createClientChannelHandler(
final ChannelPipelineInitializer initializer, final Promise promise) {
return new ChannelInitializer() {
@Override
protected void initChannel(final SocketChannel channel) {
initializer.initializeChannel(channel, promise);
}
};
}
static ChannelHandler createServerChannelHandler(
final ChannelPipelineInitializer initializer) {
return new ChannelInitializer() {
@Override
protected void initChannel(final SocketChannel channel) {
initializer.initializeChannel(channel, new DefaultPromise<>(GlobalEventExecutor.INSTANCE));
}
};
}
}
}
