From 83ea81696792e0e9158b42e3e95833939a862d21 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 000000000..c1a8e295b --- /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.EntityPlayer; +import net.minecraft.server.MinecraftServer; +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.getMotd(), server.getPlayerCount(), server.getMaxPlayers(), + server.getServerModName() + ' ' + server.getVersion(), protocolVersion, icon); + this.server = server; + } + + @Override + protected final Object[] getOnlinePlayers() { + return this.server.getPlayerList().players.toArray(); + } + + @Override + protected final Player getBukkitPlayer(Object player) { + return ((EntityPlayer) 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 000000000..a2a409e63 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/network/PaperStatusClient.java @@ -0,0 +1,11 @@ +package com.destroystokyo.paper.network; + +import net.minecraft.server.NetworkManager; + +class PaperStatusClient extends PaperNetworkClient implements StatusClient { + + PaperStatusClient(NetworkManager 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 000000000..a85466bc7 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/network/StandardPaperServerListPingEventImpl.java @@ -0,0 +1,112 @@ +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 net.minecraft.server.ChatComponentText; +import net.minecraft.server.MinecraftServer; +import net.minecraft.server.NetworkManager; +import net.minecraft.server.PacketStatusOutServerInfo; +import net.minecraft.server.ServerPing; + +import java.util.List; +import java.util.UUID; + +import javax.annotation.Nonnull; + +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, NetworkManager networkManager, ServerPing ping) { + super(server, new PaperStatusClient(networkManager), ping.getServerData() != null ? ping.getServerData().getProtocolVersion() : -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, NetworkManager networkManager) { + StandardPaperServerListPingEventImpl event = new StandardPaperServerListPingEventImpl(server, networkManager, server.getServerPing()); + server.server.getPluginManager().callEvent(event); + + // Close connection immediately if event is cancelled + if (event.isCancelled()) { + networkManager.close(null); + return; + } + + // Setup response + ServerPing ping = new ServerPing(); + + // Description + ping.setMOTD(new ChatComponentText(event.getMotd())); + + // Players + if (!event.shouldHidePlayers()) { + ping.setPlayerSample(new ServerPing.ServerPingPlayerSample(event.getMaxPlayers(), event.getNumPlayers())); + ping.getPlayers().setSample(event.getPlayerSampleHandle()); + } + + // Version + ping.setServerInfo(new ServerPing.ServerData(event.getVersion(), event.getProtocolVersion())); + + // Favicon + if (event.getServerIcon() != null) { + ping.setFavicon(event.getServerIcon().getData()); + } + + // Send response + networkManager.sendPacket(new PacketStatusOutServerInfo(ping)); + } + +} diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java index d909ad682..e5b3dc9e2 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -1,6 +1,7 @@ package net.minecraft.server; 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; @@ -1046,7 +1047,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant= 5000000000L) { this.Z = i; this.serverPing.setPlayerSample(new ServerPing.ServerPingPlayerSample(this.getMaxPlayers(), this.getPlayerCount())); - GameProfile[] agameprofile = new GameProfile[Math.min(this.getPlayerCount(), 12)]; + GameProfile[] agameprofile = new GameProfile[Math.min(this.getPlayerCount(), org.spigotmc.SpigotConfig.playerSample)]; // Paper int j = MathHelper.nextInt(this.q, 0, this.getPlayerCount() - agameprofile.length); for (int k = 0; k < agameprofile.length; ++k) { diff --git a/src/main/java/net/minecraft/server/PacketStatusListener.java b/src/main/java/net/minecraft/server/PacketStatusListener.java index b247a18b9..ba1c76c1a 100644 --- a/src/main/java/net/minecraft/server/PacketStatusListener.java +++ b/src/main/java/net/minecraft/server/PacketStatusListener.java @@ -32,6 +32,8 @@ public class PacketStatusListener implements PacketStatusInListener { this.networkManager.close(PacketStatusListener.a); } else { this.d = true; + // Paper start - Replace everything + /* // CraftBukkit start // this.networkManager.sendPacket(new PacketStatusOutServerInfo(this.minecraftServer.getServerPing())); final Object[] players = minecraftServer.getPlayerList().players.toArray(); @@ -127,6 +129,9 @@ public class PacketStatusListener implements PacketStatusInListener { ping.setServerInfo(new ServerPing.ServerData(minecraftServer.getServerModName() + " " + minecraftServer.getVersion(), version)); this.networkManager.sendPacket(new PacketStatusOutServerInfo(ping)); + */ + com.destroystokyo.paper.network.StandardPaperServerListPingEventImpl.processRequest(this.minecraftServer, this.networkManager); + // Paper end } // CraftBukkit end } diff --git a/src/main/java/net/minecraft/server/ServerPing.java b/src/main/java/net/minecraft/server/ServerPing.java index aa125a52d..ea52e89bd 100644 --- a/src/main/java/net/minecraft/server/ServerPing.java +++ b/src/main/java/net/minecraft/server/ServerPing.java @@ -29,6 +29,7 @@ public class ServerPing { this.a = ichatbasecomponent; } + public ServerPingPlayerSample getPlayers() { return b(); } // Paper - OBFHELPER public ServerPing.ServerPingPlayerSample b() { return this.b; } @@ -160,10 +161,12 @@ public class ServerPing { return this.b; } + public GameProfile[] getSample() { return c(); } // Paper - OBFHELPER public GameProfile[] c() { return this.c; } + public void setSample(GameProfile[] sample) { a(sample); } // Paper - OBFHELPER public void a(GameProfile[] agameprofile) { this.c = agameprofile; } diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java index bd601333e..6c5430ff9 100644 --- a/src/main/java/org/spigotmc/SpigotConfig.java +++ b/src/main/java/org/spigotmc/SpigotConfig.java @@ -290,7 +290,7 @@ public class SpigotConfig public static int playerSample; private static void playerSample() { - playerSample = getInt( "settings.sample-count", 12 ); + playerSample = Math.max( 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 } -- 2.21.0