From e5b9baa3179e567e8d031ea4c5bce99b8efefaf9 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 0000000000..c1a8e295b6 --- /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 0000000000..a2a409e635 --- /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 0000000000..26e3031d28 --- /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().getProtocolVersion(), 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 65204c259e..18eeee5106 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; @@ -943,7 +944,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati if (i - this.Y >= 5000000000L) { this.Y = i; this.m.setPlayerSample(new ServerPing.ServerPingPlayerSample(this.z(), this.y())); - GameProfile[] agameprofile = new GameProfile[Math.min(this.y(), 12)]; + GameProfile[] agameprofile = new GameProfile[Math.min(this.y(), org.spigotmc.SpigotConfig.playerSample)]; // Paper int j = MathHelper.nextInt(this.n, 0, this.y() - agameprofile.length); for (int k = 0; k < agameprofile.length; ++k) { @@ -1300,10 +1301,12 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati return "1.13.1"; } + public int getPlayerCount() { return y(); } // Paper - OBFHELPER public int y() { return this.s.getPlayerCount(); } + public int getMaxPlayers() { return z(); } // Paper - OBFHELPER public int z() { return this.s.getMaxPlayers(); } diff --git a/src/main/java/net/minecraft/server/PacketStatusListener.java b/src/main/java/net/minecraft/server/PacketStatusListener.java index c9edd289ac..8aa121e2f7 100644 --- a/src/main/java/net/minecraft/server/PacketStatusListener.java +++ b/src/main/java/net/minecraft/server/PacketStatusListener.java @@ -30,6 +30,8 @@ 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(); @@ -125,6 +127,9 @@ 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 615aa2cd04..408aad098a 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; } @@ -174,10 +175,12 @@ 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 9584950c63..eed96c60c5 100644 --- a/src/main/java/org/spigotmc/SpigotConfig.java +++ b/src/main/java/org/spigotmc/SpigotConfig.java @@ -291,7 +291,7 @@ 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 } -- 2.19.0