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..6ed2114f577ce12d2d493985e798609c7d83f15e --- /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.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..6b0bdc266109cdfb874f08bf74323603921d2260 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/network/StandardPaperServerListPingEventImpl.java @@ -0,0 +1,116 @@ +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.ArrayList; +import java.util.Collections; +import java.util.List; +import java.util.Optional; +import java.util.UUID; +import javax.annotation.Nonnull; +import net.minecraft.network.Connection; +import net.minecraft.network.chat.Component; +import net.minecraft.network.protocol.status.ClientboundStatusResponsePacket; +import net.minecraft.network.protocol.status.ServerStatus; +import net.minecraft.server.MinecraftServer; +import org.bukkit.craftbukkit.util.CraftIconCache; + +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 List originalSample; + + private StandardPaperServerListPingEventImpl(MinecraftServer server, Connection networkManager, ServerStatus ping) { + super(server, new PaperStatusClient(networkManager), ping.version().map(ServerStatus.Version::protocol).orElse(-1), server.server.getServerIcon()); + this.originalSample = ping.players().map(ServerStatus.Players::sample).orElse(null); // 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 List getPlayerSampleHandle() { + if (this.originalSample != null) { + return this.originalSample; + } + + List entries = super.getPlayerSample(); + if (entries.isEmpty()) { + return Collections.emptyList(); + } + + final List profiles = new ArrayList<>(); + for (PlayerProfile profile : entries) { + /* + * 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. + */ + if (profile.getId() != null && profile.getName() != null) { + profiles.add(CraftPlayerProfile.asAuthlib(profile)); + } else { + profiles.add(new GameProfile(MoreObjects.firstNonNull(profile.getId(), FAKE_UUID), Strings.nullToEmpty(profile.getName()))); + } + } + return profiles; + } + + 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 + + // Description + final Component description = new AdventureComponent(event.motd()); + + // Players + final Optional players; + if (!event.shouldHidePlayers()) { + players = Optional.of(new ServerStatus.Players(event.getMaxPlayers(), event.getNumPlayers(), event.getPlayerSampleHandle())); + } else { + players = Optional.empty(); + } + + // Version + final ServerStatus.Version version = new ServerStatus.Version(event.getVersion(), event.getProtocolVersion()); + + // Favicon + final Optional favicon; + if (event.getServerIcon() != null) { + favicon = Optional.of(new ServerStatus.Favicon(((CraftIconCache) event.getServerIcon()).value)); + } else { + favicon = Optional.empty(); + } + final ServerStatus ping = new ServerStatus(description, players, Optional.of(version), favicon, server.enforceSecureProfile()); + + // 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 7335f9bb936eeb585ee077b0b9c461d7946d6134..1c024fb7f682c81c465f59f4ab5fbeac964d73e1 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; @@ -1518,7 +1521,7 @@ 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 71540687b4212702cdaaad5fd4815fb3eb97ddd6..385457c7151f7e636e1ea2e38ef983f4f532b9b5 100644 --- a/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java +++ b/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java @@ -49,6 +49,8 @@ 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(); @@ -151,6 +153,9 @@ public class ServerStatusPacketListenerImpl implements ServerStatusPacketListene this.connection.send(new ClientboundStatusResponsePacket(ping)); // CraftBukkit end + */ + com.destroystokyo.paper.network.StandardPaperServerListPingEventImpl.processRequest(MinecraftServer.getServer(), this.connection); + // Paper end } } diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java index ba621fdc82896245f6ce448e084847edc4d3fe08..d063d356388810fb6f0dddfbc8b5885b3e6442aa 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 }