From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Minecrell Date: Wed, 11 Oct 2017 15:56:26 +0200 Subject: [PATCH] Implement extended PaperServerListPingEvent diff --git a/src/main/java/com/destroystokyo/paper/network/PaperServerListPingEventImpl.java b/src/main/java/com/destroystokyo/paper/network/PaperServerListPingEventImpl.java new file mode 100644 index 0000000000000000000000000000000000000000..5d7110a33957a597592cacb864c947eb053e8563 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/network/PaperServerListPingEventImpl.java @@ -0,0 +1,31 @@ +package com.destroystokyo.paper.network; + +import com.destroystokyo.paper.event.server.PaperServerListPingEvent; +import net.minecraft.server.MinecraftServer; +import net.minecraft.server.level.ServerPlayer; +import org.bukkit.entity.Player; +import org.bukkit.util.CachedServerIcon; + +import javax.annotation.Nullable; + +class PaperServerListPingEventImpl extends PaperServerListPingEvent { + + private final MinecraftServer server; + + PaperServerListPingEventImpl(MinecraftServer server, StatusClient client, int protocolVersion, @Nullable CachedServerIcon icon) { + super(client, server.server.motd(), server.getPlayerCount(), server.getMaxPlayers(), + server.getServerModName() + ' ' + server.getServerVersion(), protocolVersion, icon); + this.server = server; + } + + @Override + protected final Object[] getOnlinePlayers() { + return this.server.getPlayerList().players.toArray(); + } + + @Override + protected final Player getBukkitPlayer(Object player) { + return ((ServerPlayer) player).getBukkitEntity(); + } + +} diff --git a/src/main/java/com/destroystokyo/paper/network/PaperStatusClient.java b/src/main/java/com/destroystokyo/paper/network/PaperStatusClient.java new file mode 100644 index 0000000000000000000000000000000000000000..d926ad804355ee2fdc5910b2505e8671602acdab --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/network/PaperStatusClient.java @@ -0,0 +1,11 @@ +package com.destroystokyo.paper.network; + +import net.minecraft.network.Connection; + +class PaperStatusClient extends PaperNetworkClient implements StatusClient { + + PaperStatusClient(Connection networkManager) { + super(networkManager); + } + +} diff --git a/src/main/java/com/destroystokyo/paper/network/StandardPaperServerListPingEventImpl.java b/src/main/java/com/destroystokyo/paper/network/StandardPaperServerListPingEventImpl.java new file mode 100644 index 0000000000000000000000000000000000000000..4c2351b03b58511b80017b58ee9b20ab5193adc9 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/network/StandardPaperServerListPingEventImpl.java @@ -0,0 +1,110 @@ +package com.destroystokyo.paper.network; + +import com.destroystokyo.paper.profile.CraftPlayerProfile; +import com.destroystokyo.paper.profile.PlayerProfile; +import com.google.common.base.MoreObjects; +import com.google.common.base.Strings; +import com.mojang.authlib.GameProfile; +import io.papermc.paper.adventure.AdventureComponent; +import java.util.List; +import java.util.UUID; +import javax.annotation.Nonnull; +import net.minecraft.network.Connection; +import net.minecraft.network.protocol.status.ClientboundStatusResponsePacket; +import net.minecraft.network.protocol.status.ServerStatus; +import net.minecraft.server.MinecraftServer; + +public final class StandardPaperServerListPingEventImpl extends PaperServerListPingEventImpl { + + private static final GameProfile[] EMPTY_PROFILES = new GameProfile[0]; + private static final UUID FAKE_UUID = new UUID(0, 0); + + private GameProfile[] originalSample; + + private StandardPaperServerListPingEventImpl(MinecraftServer server, Connection networkManager, ServerStatus ping) { + super(server, new PaperStatusClient(networkManager), ping.getVersion() != null ? ping.getVersion().getProtocol() : -1, server.server.getServerIcon()); + this.originalSample = ping.getPlayers() == null ? null : ping.getPlayers().getSample(); // GH-1473 - pre-tick race condition NPE + } + + @Nonnull + @Override + public List getPlayerSample() { + List sample = super.getPlayerSample(); + + if (this.originalSample != null) { + for (GameProfile profile : this.originalSample) { + sample.add(CraftPlayerProfile.asBukkitCopy(profile)); + } + this.originalSample = null; + } + + return sample; + } + + private GameProfile[] getPlayerSampleHandle() { + if (this.originalSample != null) { + return this.originalSample; + } + + List entries = super.getPlayerSample(); + if (entries.isEmpty()) { + return EMPTY_PROFILES; + } + + GameProfile[] profiles = new GameProfile[entries.size()]; + for (int i = 0; i < profiles.length; i++) { + /* + * Avoid null UUIDs/names since that will make the response invalid + * on the client. + * Instead, fall back to a fake/empty UUID and an empty string as name. + * This can be used to create custom lines in the player list that do not + * refer to a specific player. + */ + + PlayerProfile profile = entries.get(i); + if (profile.getId() != null && profile.getName() != null) { + profiles[i] = CraftPlayerProfile.asAuthlib(profile); + } else { + profiles[i] = new GameProfile(MoreObjects.firstNonNull(profile.getId(), FAKE_UUID), Strings.nullToEmpty(profile.getName())); + } + } + + return profiles; + } + + @SuppressWarnings("deprecation") + public static void processRequest(MinecraftServer server, Connection networkManager) { + StandardPaperServerListPingEventImpl event = new StandardPaperServerListPingEventImpl(server, networkManager, server.getStatus()); + server.server.getPluginManager().callEvent(event); + + // Close connection immediately if event is cancelled + if (event.isCancelled()) { + networkManager.disconnect(null); + return; + } + + // Setup response + ServerStatus ping = new ServerStatus(); + + // Description + ping.setDescription(new AdventureComponent(event.motd())); + + // Players + if (!event.shouldHidePlayers()) { + ping.setPlayers(new ServerStatus.Players(event.getMaxPlayers(), event.getNumPlayers())); + ping.getPlayers().setSample(event.getPlayerSampleHandle()); + } + + // Version + ping.setVersion(new ServerStatus.Version(event.getVersion(), event.getProtocolVersion())); + + // Favicon + if (event.getServerIcon() != null) { + ping.setFavicon(event.getServerIcon().getData()); + } + + // Send response + networkManager.send(new ClientboundStatusResponsePacket(ping)); + } + +} diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java index 44c9135e8d63df11009d5eea509c6c57e8d841c4..163993cd4fe52c5bd89db656d61ff795b6ddc896 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -3,6 +3,9 @@ package net.minecraft.server; import com.google.common.base.Preconditions; import com.google.common.base.Splitter; import com.google.common.collect.ImmutableList; +import co.aikar.timings.Timings; +import com.destroystokyo.paper.event.server.PaperServerListPingEvent; +import com.google.common.base.Stopwatch; import com.google.common.collect.Lists; import com.google.common.collect.Maps; import com.google.common.collect.Sets; @@ -1348,7 +1351,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop objectarraylist = new ObjectArrayList(j); int k = Mth.nextInt(this.random, 0, list.size() - j); diff --git a/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java index d99b2235038eb1aba8cda474c4aa51e207149ef4..4eebe72d8ef4e71271c583545c7312212fabe8ec 100644 --- a/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java +++ b/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java @@ -48,6 +48,8 @@ public class ServerStatusPacketListenerImpl implements ServerStatusPacketListene this.connection.disconnect(ServerStatusPacketListenerImpl.DISCONNECT_REASON); } else { this.hasRequestedStatus = true; + // Paper start - Replace everything + /* // CraftBukkit start // this.connection.send(new PacketStatusOutServerInfo(this.status)); MinecraftServer server = MinecraftServer.getServer(); @@ -150,6 +152,9 @@ public class ServerStatusPacketListenerImpl implements ServerStatusPacketListene this.connection.send(new ClientboundStatusResponsePacket(ping)); // CraftBukkit end + */ + com.destroystokyo.paper.network.StandardPaperServerListPingEventImpl.processRequest(this.server, this.connection); + // Paper end } } diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java index 489ce6f439778b26eb33ede9432681d4bf9e0116..ddc5f2d9aa7dda6aff132392927e3d7e3674dbff 100644 --- a/src/main/java/org/spigotmc/SpigotConfig.java +++ b/src/main/java/org/spigotmc/SpigotConfig.java @@ -289,7 +289,7 @@ public class SpigotConfig public static int playerSample; private static void playerSample() { - SpigotConfig.playerSample = SpigotConfig.getInt( "settings.sample-count", 12 ); + SpigotConfig.playerSample = Math.max( SpigotConfig.getInt( "settings.sample-count", 12 ), 0 ); // Paper - Avoid negative counts Bukkit.getLogger().log( Level.INFO, "Server Ping Player Sample Count: {0}", playerSample ); // Paper - Use logger }