451 lines
18 KiB
Java
451 lines
18 KiB
Java
/*
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* Copyright 2016 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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* https://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.kqueue;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufAllocator;
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import io.netty.buffer.ByteBufConvertible;
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import io.netty.channel.AddressedEnvelope;
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import io.netty.channel.ChannelPipeline;
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import io.netty.channel.DefaultAddressedEnvelope;
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import io.netty.channel.EventLoop;
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import io.netty.channel.socket.DatagramChannel;
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import io.netty.channel.socket.DatagramChannelConfig;
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import io.netty.channel.socket.DatagramPacket;
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import io.netty.channel.unix.DatagramSocketAddress;
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import io.netty.channel.unix.Errors;
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import io.netty.channel.unix.IovArray;
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import io.netty.channel.unix.UnixChannelUtil;
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import io.netty.util.UncheckedBooleanSupplier;
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import io.netty.util.concurrent.Future;
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import io.netty.util.concurrent.Promise;
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import io.netty.util.internal.StringUtil;
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import io.netty.util.internal.UnstableApi;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.NetworkInterface;
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import java.net.PortUnreachableException;
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import java.net.SocketAddress;
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import java.net.SocketException;
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import java.nio.ByteBuffer;
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import static io.netty.channel.kqueue.BsdSocket.newSocketDgram;
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import static java.util.Objects.requireNonNull;
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@UnstableApi
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public final class KQueueDatagramChannel extends AbstractKQueueDatagramChannel implements DatagramChannel {
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private static final String EXPECTED_TYPES =
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" (expected: " + StringUtil.simpleClassName(DatagramPacket.class) + ", " +
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StringUtil.simpleClassName(AddressedEnvelope.class) + '<' +
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StringUtil.simpleClassName(ByteBuf.class) + ", " +
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StringUtil.simpleClassName(InetSocketAddress.class) + ">, " +
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StringUtil.simpleClassName(ByteBuf.class) + ')';
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private volatile boolean connected;
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private final KQueueDatagramChannelConfig config;
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public KQueueDatagramChannel(EventLoop eventLoop) {
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super(null, eventLoop, newSocketDgram(), false);
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config = new KQueueDatagramChannelConfig(this);
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}
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public KQueueDatagramChannel(EventLoop eventLoop, int fd) {
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this(eventLoop, new BsdSocket(fd), true);
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}
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KQueueDatagramChannel(EventLoop eventLoop, BsdSocket socket, boolean active) {
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super(null, eventLoop, socket, active);
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config = new KQueueDatagramChannelConfig(this);
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}
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@Override
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public InetSocketAddress remoteAddress() {
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return (InetSocketAddress) super.remoteAddress();
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}
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@Override
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public InetSocketAddress localAddress() {
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return (InetSocketAddress) super.localAddress();
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}
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@Override
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public boolean isActive() {
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return socket.isOpen() && (config.getActiveOnOpen() && isRegistered() || active);
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}
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@Override
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public boolean isConnected() {
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return connected;
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}
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@Override
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public Future<Void> joinGroup(InetAddress multicastAddress) {
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return joinGroup(multicastAddress, newPromise());
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}
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@Override
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public Future<Void> joinGroup(InetAddress multicastAddress, Promise<Void> promise) {
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try {
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NetworkInterface iface = config().getNetworkInterface();
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if (iface == null) {
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iface = NetworkInterface.getByInetAddress(localAddress().getAddress());
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}
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return joinGroup(multicastAddress, iface, null, promise);
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} catch (SocketException e) {
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return promise.setFailure(e).asFuture();
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}
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}
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@Override
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public Future<Void> joinGroup(
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InetSocketAddress multicastAddress, NetworkInterface networkInterface) {
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return joinGroup(multicastAddress, networkInterface, newPromise());
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}
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@Override
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public Future<Void> joinGroup(
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InetSocketAddress multicastAddress, NetworkInterface networkInterface,
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Promise<Void> promise) {
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return joinGroup(multicastAddress.getAddress(), networkInterface, null, promise);
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}
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@Override
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public Future<Void> joinGroup(
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InetAddress multicastAddress, NetworkInterface networkInterface, InetAddress source) {
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return joinGroup(multicastAddress, networkInterface, source, newPromise());
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}
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@Override
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public Future<Void> joinGroup(
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final InetAddress multicastAddress, final NetworkInterface networkInterface,
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final InetAddress source, final Promise<Void> promise) {
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requireNonNull(multicastAddress, "multicastAddress");
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requireNonNull(networkInterface, "networkInterface");
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promise.setFailure(new UnsupportedOperationException("Multicast not supported"));
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return promise.asFuture();
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}
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@Override
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public Future<Void> leaveGroup(InetAddress multicastAddress) {
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return leaveGroup(multicastAddress, newPromise());
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}
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@Override
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public Future<Void> leaveGroup(InetAddress multicastAddress, Promise<Void> promise) {
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try {
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return leaveGroup(
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multicastAddress, NetworkInterface.getByInetAddress(localAddress().getAddress()), null, promise);
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} catch (SocketException e) {
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return promise.setFailure(e).asFuture();
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}
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}
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@Override
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public Future<Void> leaveGroup(
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InetSocketAddress multicastAddress, NetworkInterface networkInterface) {
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return leaveGroup(multicastAddress, networkInterface, newPromise());
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}
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@Override
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public Future<Void> leaveGroup(
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InetSocketAddress multicastAddress,
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NetworkInterface networkInterface, Promise<Void> promise) {
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return leaveGroup(multicastAddress.getAddress(), networkInterface, null, promise);
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}
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@Override
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public Future<Void> leaveGroup(
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InetAddress multicastAddress, NetworkInterface networkInterface, InetAddress source) {
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return leaveGroup(multicastAddress, networkInterface, source, newPromise());
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}
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@Override
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public Future<Void> leaveGroup(
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final InetAddress multicastAddress, final NetworkInterface networkInterface, final InetAddress source,
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final Promise<Void> promise) {
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requireNonNull(multicastAddress, "multicastAddress");
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requireNonNull(networkInterface, "networkInterface");
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promise.setFailure(new UnsupportedOperationException("Multicast not supported"));
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return promise.asFuture();
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}
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@Override
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public Future<Void> block(
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InetAddress multicastAddress, NetworkInterface networkInterface,
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InetAddress sourceToBlock) {
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return block(multicastAddress, networkInterface, sourceToBlock, newPromise());
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}
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@Override
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public Future<Void> block(
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final InetAddress multicastAddress, final NetworkInterface networkInterface,
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final InetAddress sourceToBlock, final Promise<Void> promise) {
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requireNonNull(multicastAddress, "multicastAddress");
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requireNonNull(sourceToBlock, "sourceToBlock");
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requireNonNull(networkInterface, "networkInterface");
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promise.setFailure(new UnsupportedOperationException("Multicast not supported"));
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return promise.asFuture();
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}
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@Override
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public Future<Void> block(InetAddress multicastAddress, InetAddress sourceToBlock) {
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return block(multicastAddress, sourceToBlock, newPromise());
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}
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@Override
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public Future<Void> block(
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InetAddress multicastAddress, InetAddress sourceToBlock, Promise<Void> promise) {
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try {
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return block(
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multicastAddress,
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NetworkInterface.getByInetAddress(localAddress().getAddress()),
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sourceToBlock, promise);
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} catch (Throwable e) {
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return promise.setFailure(e).asFuture();
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}
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}
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@Override
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protected AbstractKQueueUnsafe newUnsafe() {
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return new KQueueDatagramChannelUnsafe();
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}
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@Override
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protected void doBind(SocketAddress localAddress) throws Exception {
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super.doBind(localAddress);
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active = true;
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}
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@Override
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protected boolean doWriteMessage(Object msg) throws Exception {
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final ByteBuf data;
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InetSocketAddress remoteAddress;
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if (msg instanceof AddressedEnvelope) {
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@SuppressWarnings("unchecked")
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AddressedEnvelope<ByteBuf, InetSocketAddress> envelope =
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(AddressedEnvelope<ByteBuf, InetSocketAddress>) msg;
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data = envelope.content();
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remoteAddress = envelope.recipient();
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} else {
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data = ((ByteBufConvertible) msg).asByteBuf();
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remoteAddress = null;
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}
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final int dataLen = data.readableBytes();
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if (dataLen == 0) {
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return true;
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}
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final long writtenBytes;
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if (data.hasMemoryAddress()) {
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long memoryAddress = data.memoryAddress();
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if (remoteAddress == null) {
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writtenBytes = socket.writeAddress(memoryAddress, data.readerIndex(), data.writerIndex());
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} else {
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writtenBytes = socket.sendToAddress(memoryAddress, data.readerIndex(), data.writerIndex(),
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remoteAddress.getAddress(), remoteAddress.getPort());
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}
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} else if (data.nioBufferCount() > 1) {
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IovArray array = registration().cleanArray();
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array.add(data, data.readerIndex(), data.readableBytes());
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int cnt = array.count();
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assert cnt != 0;
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if (remoteAddress == null) {
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writtenBytes = socket.writevAddresses(array.memoryAddress(0), cnt);
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} else {
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writtenBytes = socket.sendToAddresses(array.memoryAddress(0), cnt,
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remoteAddress.getAddress(), remoteAddress.getPort());
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}
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} else {
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ByteBuffer nioData = data.internalNioBuffer(data.readerIndex(), data.readableBytes());
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if (remoteAddress == null) {
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writtenBytes = socket.write(nioData, nioData.position(), nioData.limit());
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} else {
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writtenBytes = socket.sendTo(nioData, nioData.position(), nioData.limit(),
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remoteAddress.getAddress(), remoteAddress.getPort());
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}
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}
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return writtenBytes > 0;
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}
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@Override
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protected Object filterOutboundMessage(Object msg) {
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if (msg instanceof DatagramPacket) {
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DatagramPacket packet = (DatagramPacket) msg;
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ByteBuf content = packet.content();
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return UnixChannelUtil.isBufferCopyNeededForWrite(content)?
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new DatagramPacket(newDirectBuffer(packet, content), packet.recipient()) : msg;
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}
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if (msg instanceof ByteBufConvertible) {
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ByteBuf buf = ((ByteBufConvertible) msg).asByteBuf();
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return UnixChannelUtil.isBufferCopyNeededForWrite(buf)? newDirectBuffer(buf) : buf;
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}
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if (msg instanceof AddressedEnvelope) {
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@SuppressWarnings("unchecked")
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AddressedEnvelope<Object, SocketAddress> e = (AddressedEnvelope<Object, SocketAddress>) msg;
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if (e.content() instanceof ByteBufConvertible &&
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(e.recipient() == null || e.recipient() instanceof InetSocketAddress)) {
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ByteBuf content = ((ByteBufConvertible) e.content()).asByteBuf();
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return UnixChannelUtil.isBufferCopyNeededForWrite(content)?
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new DefaultAddressedEnvelope<>(
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newDirectBuffer(e, content), (InetSocketAddress) e.recipient()) : e;
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}
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}
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throw new UnsupportedOperationException(
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"unsupported message type: " + StringUtil.simpleClassName(msg) + EXPECTED_TYPES);
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}
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@Override
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public KQueueDatagramChannelConfig config() {
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return config;
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}
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@Override
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protected void doDisconnect() throws Exception {
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socket.disconnect();
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connected = active = false;
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resetCachedAddresses();
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}
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@Override
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protected boolean doConnect(SocketAddress remoteAddress, SocketAddress localAddress) throws Exception {
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if (super.doConnect(remoteAddress, localAddress)) {
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connected = true;
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return true;
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}
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return false;
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}
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@Override
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protected void doClose() throws Exception {
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super.doClose();
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connected = false;
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}
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final class KQueueDatagramChannelUnsafe extends AbstractKQueueUnsafe {
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@Override
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void readReady(KQueueRecvByteAllocatorHandle allocHandle) {
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assert executor().inEventLoop();
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final DatagramChannelConfig config = config();
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if (shouldBreakReadReady(config)) {
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clearReadFilter0();
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return;
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}
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final ChannelPipeline pipeline = pipeline();
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final ByteBufAllocator allocator = config.getAllocator();
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allocHandle.reset(config);
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readReadyBefore();
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Throwable exception = null;
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try {
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ByteBuf byteBuf = null;
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try {
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boolean connected = isConnected();
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do {
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byteBuf = allocHandle.allocate(allocator);
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allocHandle.attemptedBytesRead(byteBuf.writableBytes());
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final DatagramPacket packet;
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if (connected) {
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try {
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allocHandle.lastBytesRead(doReadBytes(byteBuf));
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} catch (Errors.NativeIoException e) {
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// We need to correctly translate connect errors to match NIO behaviour.
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if (e.expectedErr() == Errors.ERROR_ECONNREFUSED_NEGATIVE) {
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PortUnreachableException error = new PortUnreachableException(e.getMessage());
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error.initCause(e);
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throw error;
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}
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throw e;
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}
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if (allocHandle.lastBytesRead() <= 0) {
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// nothing was read, release the buffer.
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byteBuf.release();
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byteBuf = null;
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break;
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}
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packet = new DatagramPacket(byteBuf,
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(InetSocketAddress) localAddress(), (InetSocketAddress) remoteAddress());
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} else {
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final DatagramSocketAddress remoteAddress;
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if (byteBuf.hasMemoryAddress()) {
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// has a memory address so use optimized call
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remoteAddress = socket.recvFromAddress(byteBuf.memoryAddress(), byteBuf.writerIndex(),
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byteBuf.capacity());
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} else {
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ByteBuffer nioData = byteBuf.internalNioBuffer(
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byteBuf.writerIndex(), byteBuf.writableBytes());
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remoteAddress = socket.recvFrom(nioData, nioData.position(), nioData.limit());
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}
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if (remoteAddress == null) {
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allocHandle.lastBytesRead(-1);
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byteBuf.release();
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byteBuf = null;
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break;
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}
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InetSocketAddress localAddress = remoteAddress.localAddress();
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if (localAddress == null) {
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localAddress = (InetSocketAddress) localAddress();
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}
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allocHandle.lastBytesRead(remoteAddress.receivedAmount());
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byteBuf.writerIndex(byteBuf.writerIndex() + allocHandle.lastBytesRead());
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packet = new DatagramPacket(byteBuf, localAddress, remoteAddress);
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}
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allocHandle.incMessagesRead(1);
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readPending = false;
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pipeline.fireChannelRead(packet);
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byteBuf = null;
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// We use the TRUE_SUPPLIER as it is also ok to read less then what we did try to read (as long
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// as we read anything).
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} while (allocHandle.continueReading(UncheckedBooleanSupplier.TRUE_SUPPLIER));
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} catch (Throwable t) {
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if (byteBuf != null) {
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byteBuf.release();
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}
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exception = t;
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}
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allocHandle.readComplete();
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pipeline.fireChannelReadComplete();
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if (exception != null) {
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pipeline.fireExceptionCaught(exception);
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} else {
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readIfIsAutoRead();
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}
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} finally {
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readReadyFinally(config);
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}
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}
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}
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}
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