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core/src/main/java/org/geysermc/geyser/network/netty/Bootstraps.java
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| /* | ||
| * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| * | ||
| * @author GeyserMC | ||
| * @link https://github.com/GeyserMC/Geyser | ||
| */ | ||
|
|
||
| package org.geysermc.geyser.network.netty; | ||
|
|
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| import io.netty.bootstrap.AbstractBootstrap; | ||
| import io.netty.channel.Channel; | ||
| import io.netty.channel.ChannelFuture; | ||
| import io.netty.channel.epoll.Native; | ||
| import io.netty.channel.unix.UnixChannelOption; | ||
| import lombok.experimental.UtilityClass; | ||
|
|
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| import java.util.Optional; | ||
| import java.util.concurrent.CompletableFuture; | ||
|
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| @SuppressWarnings("OptionalUsedAsFieldOrParameterType") | ||
| @UtilityClass | ||
| public final class Bootstraps { | ||
| private static final Optional<int[]> KERNEL_VERSION; | ||
|
|
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| // The REUSEPORT_AVAILABLE socket option is available starting from kernel version 3.9. | ||
| // This option allows multiple sockets to listen on the same IP address and port without conflict. | ||
| private static final int[] REUSEPORT_VERSION = new int[]{3, 9, 0}; | ||
| private static final boolean REUSEPORT_AVAILABLE; | ||
|
|
||
| static { | ||
| String kernelVersion; | ||
| try { | ||
| kernelVersion = Native.KERNEL_VERSION; | ||
| } catch (Throwable e) { | ||
| kernelVersion = null; | ||
| } | ||
| if (kernelVersion != null && kernelVersion.contains("-")) { | ||
| int index = kernelVersion.indexOf('-'); | ||
| if (index > -1) { | ||
| kernelVersion = kernelVersion.substring(0, index); | ||
| } | ||
| int[] kernelVer = fromString(kernelVersion); | ||
| KERNEL_VERSION = Optional.of(kernelVer); | ||
| REUSEPORT_AVAILABLE = checkVersion(kernelVer, 0); | ||
| } else { | ||
| KERNEL_VERSION = Optional.empty(); | ||
| REUSEPORT_AVAILABLE = false; | ||
| } | ||
| } | ||
|
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| public static Optional<int[]> getKernelVersion() { | ||
| return KERNEL_VERSION; | ||
| } | ||
|
|
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| public static boolean isReusePortAvailable() { | ||
| return REUSEPORT_AVAILABLE; | ||
| } | ||
|
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| @SuppressWarnings({"rawtypes, unchecked"}) | ||
| public static void setupBootstrap(AbstractBootstrap bootstrap) { | ||
| if (REUSEPORT_AVAILABLE) { | ||
| bootstrap.option(UnixChannelOption.SO_REUSEPORT, true); | ||
| } | ||
| } | ||
|
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| private static int[] fromString(String ver) { | ||
| String[] parts = ver.split("\\."); | ||
| if (parts.length < 2) { | ||
| throw new IllegalArgumentException("At least 2 version numbers required"); | ||
| } | ||
|
|
||
| return new int[]{ | ||
| Integer.parseInt(parts[0]), | ||
| Integer.parseInt(parts[1]), | ||
| parts.length == 2 ? 0 : Integer.parseInt(parts[2]) | ||
| }; | ||
| } | ||
|
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| private static boolean checkVersion(int[] ver, int i) { | ||
| if (ver[i] > REUSEPORT_VERSION[i]) { | ||
| return true; | ||
| } else if (ver[i] == REUSEPORT_VERSION[i]) { | ||
| if (ver.length == (i + 1)) { | ||
| return true; | ||
| } else { | ||
| return checkVersion(ver, i + 1); | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
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| public static CompletableFuture<Void> allOf(ChannelFuture... futures) { | ||
| if (futures == null || futures.length == 0) { | ||
| return CompletableFuture.completedFuture(null); | ||
| } | ||
| @SuppressWarnings("unchecked") | ||
| CompletableFuture<Channel>[] completableFutures = new CompletableFuture[futures.length]; | ||
| for (int i = 0; i < futures.length; i++) { | ||
| ChannelFuture channelFuture = futures[i]; | ||
| CompletableFuture<Channel> completableFuture = new CompletableFuture<>(); | ||
| channelFuture.addListener(future -> { | ||
| if (future.cause() != null) { | ||
| completableFuture.completeExceptionally(future.cause()); | ||
| } | ||
| completableFuture.complete(channelFuture.channel()); | ||
| }); | ||
| completableFutures[i] = completableFuture; | ||
| } | ||
|
|
||
| return CompletableFuture.allOf(completableFutures); | ||
| } | ||
| } |
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