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PaperMC/patches/server/0179-Call-PaperServerListPingEvent-for-legacy-pings.patch
Nassim Jahnke ab9a3db5ba
More work
2024-12-03 19:05:31 +01:00

155 lines
8.1 KiB
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Minecrell <minecrell@minecrell.net>
Date: Wed, 11 Oct 2017 19:30:51 +0200
Subject: [PATCH] Call PaperServerListPingEvent for legacy pings
diff --git a/src/main/java/com/destroystokyo/paper/network/PaperLegacyStatusClient.java b/src/main/java/com/destroystokyo/paper/network/PaperLegacyStatusClient.java
new file mode 100644
index 0000000000000000000000000000000000000000..cc54b1c207981235b5160e8773b27cf9a5dcd4d5
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/network/PaperLegacyStatusClient.java
@@ -0,0 +1,75 @@
+package com.destroystokyo.paper.network;
+
+import com.destroystokyo.paper.event.server.PaperServerListPingEvent;
+import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
+import net.minecraft.ChatFormatting;
+import net.minecraft.server.MinecraftServer;
+import org.apache.commons.lang3.StringUtils;
+
+import java.net.InetSocketAddress;
+
+import javax.annotation.Nullable;
+
+public final class PaperLegacyStatusClient implements StatusClient {
+
+ private final InetSocketAddress address;
+ private final int protocolVersion;
+ @Nullable private final InetSocketAddress virtualHost;
+
+ private PaperLegacyStatusClient(InetSocketAddress address, int protocolVersion, @Nullable InetSocketAddress virtualHost) {
+ this.address = address;
+ this.protocolVersion = protocolVersion;
+ this.virtualHost = virtualHost;
+ }
+
+ @Override
+ public InetSocketAddress getAddress() {
+ return this.address;
+ }
+
+ @Override
+ public int getProtocolVersion() {
+ return this.protocolVersion;
+ }
+
+ @Nullable
+ @Override
+ public InetSocketAddress getVirtualHost() {
+ return this.virtualHost;
+ }
+
+ @Override
+ public boolean isLegacy() {
+ return true;
+ }
+
+ public static PaperServerListPingEvent processRequest(MinecraftServer server,
+ InetSocketAddress address, int protocolVersion, @Nullable InetSocketAddress virtualHost) {
+
+ PaperServerListPingEvent event = new PaperServerListPingEventImpl(server,
+ new PaperLegacyStatusClient(address, protocolVersion, virtualHost), Byte.MAX_VALUE, null);
+ server.server.getPluginManager().callEvent(event);
+
+ if (event.isCancelled()) {
+ return null;
+ }
+
+ return event;
+ }
+
+ @SuppressWarnings("deprecation") // Valid as this is the legacy status client
+ public static String getMotd(PaperServerListPingEvent event) {
+ return getFirstLine(event.getMotd());
+ }
+
+ public static String getUnformattedMotd(PaperServerListPingEvent event) {
+ // Strip color codes and all other occurrences of the color char (because it's used as delimiter)
+ return getFirstLine(StringUtils.remove(PlainTextComponentSerializer.plainText().serialize(event.motd()), ChatFormatting.PREFIX_CODE));
+ }
+
+ private static String getFirstLine(String s) {
+ int pos = s.indexOf('\n');
+ return pos >= 0 ? s.substring(0, pos) : s;
+ }
+
+}
diff --git a/src/main/java/net/minecraft/server/network/LegacyQueryHandler.java b/src/main/java/net/minecraft/server/network/LegacyQueryHandler.java
index 738da83f82bf01bde94c956ac22525a638db3906..d4f5a98a0b1ca9f2a8baa6e0b27353df94d1f333 100644
--- a/src/main/java/net/minecraft/server/network/LegacyQueryHandler.java
+++ b/src/main/java/net/minecraft/server/network/LegacyQueryHandler.java
@@ -46,11 +46,22 @@ public class LegacyQueryHandler extends ChannelInboundHandlerAdapter {
SocketAddress socketaddress = channelhandlercontext.channel().remoteAddress();
int i = bytebuf.readableBytes();
String s = null; // Paper
- org.bukkit.event.server.ServerListPingEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callServerListPingEvent(socketaddress, this.server.getMotd(), this.server.getPlayerCount(), this.server.getMaxPlayers()); // CraftBukkit
+ // org.bukkit.event.server.ServerListPingEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callServerListPingEvent(socketaddress, this.server.getMotd(), this.server.getPlayerCount(), this.server.getMaxPlayers()); // CraftBukkit // Paper
+ com.destroystokyo.paper.event.server.PaperServerListPingEvent event; // Paper
if (i == 0) {
LegacyQueryHandler.LOGGER.debug("Ping: (<1.3.x) from {}", socketaddress);
- s = LegacyQueryHandler.createVersion0Response(this.server, event); // CraftBukkit
+
+ // Paper start - Call PaperServerListPingEvent and use results
+ event = com.destroystokyo.paper.network.PaperLegacyStatusClient.processRequest(net.minecraft.server.MinecraftServer.getServer(), (java.net.InetSocketAddress) socketaddress, 39, null);
+ if (event == null) {
+ channelhandlercontext.close();
+ bytebuf.release();
+ flag = false;
+ return;
+ }
+ s = String.format(Locale.ROOT, "%s\u00a7%d\u00a7%d", com.destroystokyo.paper.network.PaperLegacyStatusClient.getUnformattedMotd(event), event.getNumPlayers(), event.getMaxPlayers());
+ // Paper end
LegacyQueryHandler.sendFlushAndClose(channelhandlercontext, LegacyQueryHandler.createLegacyDisconnectPacket(channelhandlercontext.alloc(), s));
} else {
if (bytebuf.readUnsignedByte() != 1) {
@@ -75,7 +86,18 @@ public class LegacyQueryHandler extends ChannelInboundHandlerAdapter {
LegacyQueryHandler.LOGGER.debug("Ping: (1.4-1.5.x) from {}", socketaddress);
}
- if (s == null) s = LegacyQueryHandler.createVersion1Response(this.server, event); // CraftBukkit // Paper
+ if (s == null) {
+ // Paper start - Call PaperServerListPingEvent and use results
+ event = com.destroystokyo.paper.network.PaperLegacyStatusClient.processRequest(net.minecraft.server.MinecraftServer.getServer(), (java.net.InetSocketAddress) socketaddress, 127, null); // Paper
+ if (event == null) {
+ channelhandlercontext.close();
+ bytebuf.release();
+ flag = false;
+ return;
+ }
+ s = String.format(Locale.ROOT, "\u00a71\u0000%d\u0000%s\u0000%s\u0000%d\u0000%d", new Object[] { event.getProtocolVersion(), this.server.getServerVersion(), event.getMotd(), event.getNumPlayers(), event.getMaxPlayers()}); // CraftBukkit
+ // Paper end
+ }
LegacyQueryHandler.sendFlushAndClose(channelhandlercontext, LegacyQueryHandler.createLegacyDisconnectPacket(channelhandlercontext.alloc(), s));
}
@@ -187,8 +209,16 @@ public class LegacyQueryHandler extends ChannelInboundHandlerAdapter {
LOGGER.debug("Ping: (1.6) from {}", ctx.channel().remoteAddress());
- String response = String.format("\u00a71\u0000%d\u0000%s\u0000%s\u0000%d\u0000%d",
- Byte.MAX_VALUE, server.getServerVersion(), server.getMotd(), server.getPlayerCount(), server.getMaxPlayers());
+ java.net.InetSocketAddress virtualHost = com.destroystokyo.paper.network.PaperNetworkClient.prepareVirtualHost(host, port);
+ com.destroystokyo.paper.event.server.PaperServerListPingEvent event = com.destroystokyo.paper.network.PaperLegacyStatusClient.processRequest(
+ server, (java.net.InetSocketAddress) ctx.channel().remoteAddress(), protocolVersion, virtualHost);
+ if (event == null) {
+ ctx.close();
+ return null;
+ }
+
+ String response = String.format("\u00a71\u0000%d\u0000%s\u0000%s\u0000%d\u0000%d", event.getProtocolVersion(), event.getVersion(),
+ com.destroystokyo.paper.network.PaperLegacyStatusClient.getMotd(event), event.getNumPlayers(), event.getMaxPlayers());
return response;
}