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papermc/Spigot-Server-Patches/0209-Implement-extended-PaperServerListPingEvent.patch
Zach Brown 70ce6ce831
Move version command update checking to the implementation 
This makes it easier for downstream projects (forks) to replace the
version fetching system with their own. It is as simple as implementing
an interface and overriding the default implementation of
org.bukkit.UnsafeValues#getVersionFetcher()

It also makes it easier for us to organize things like the version
history feature.

Lastly I have updated the paper implementation to check against the site
API rather than against jenkins.
2019-05-27 04:13:41 -05:00

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From 23a98f20471a931dadc359fd9451cac5319e372d Mon Sep 17 00:00:00 2001
From: Minecrell <minecrell@minecrell.net>
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<PlayerProfile> getPlayerSample() {
+ List<PlayerProfile> 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<PlayerProfile> 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 5817e9452..7e27f1079 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<TickTas
if (i - this.Z >= 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
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