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Add GS4 query event (#1906)

This commit is contained in:
Mark Vainomaa 2019-03-24 19:01:31 +02:00 committed by Daniel Ennis
parent 0f82626d76
commit 556259dd97
2 changed files with 646 additions and 0 deletions
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426
Spigot-API-Patches/0176-Add-GS4-Query-event.patch Normal file
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@ -0,0 +1,426 @@
From 784e07fa6c5fa8c82d5da5f08f79563f467231ca Mon Sep 17 00:00:00 2001
From: Mark Vainomaa <mikroskeem@mikroskeem.eu>
Date: Sun, 17 Mar 2019 21:46:27 +0200
Subject: [PATCH] Add GS4 Query event
diff --git a/src/main/java/com/destroystokyo/paper/event/server/GS4QueryEvent.java b/src/main/java/com/destroystokyo/paper/event/server/GS4QueryEvent.java
new file mode 100644
index 000000000..2ead0466e
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/server/GS4QueryEvent.java
@@ -0,0 +1,411 @@
+package com.destroystokyo.paper.event.server;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * This event is fired if server is getting queried over GS4 Query protocol
+ *
+ * Adapted from Velocity's ProxyQueryEvent
+ *
+ * @author Mark Vainomaa
+ */
+public final class GS4QueryEvent extends Event {
+ private static final HandlerList handlers = new HandlerList();
+
+ private final QueryType queryType;
+ private final InetAddress querierAddress;
+ private QueryResponse response;
+
+ public GS4QueryEvent(@NotNull QueryType queryType, @NotNull InetAddress querierAddress, @NotNull QueryResponse response) {
+ this.queryType = Preconditions.checkNotNull(queryType, "queryType");
+ this.querierAddress = Preconditions.checkNotNull(querierAddress, "querierAddress");
+ this.response = Preconditions.checkNotNull(response, "response");
+ }
+
+ /**
+ * Get query type
+ * @return query type
+ */
+ @NotNull
+ public QueryType getQueryType() {
+ return queryType;
+ }
+
+ /**
+ * Get querier address
+ * @return querier address
+ */
+ @NotNull
+ public InetAddress getQuerierAddress() {
+ return querierAddress;
+ }
+
+ /**
+ * Get query response
+ * @return query response
+ */
+ @NotNull
+ public QueryResponse getResponse() {
+ return response;
+ }
+
+ /**
+ * Set query response
+ * @param response query response
+ */
+ public void setResponse(@NotNull QueryResponse response) {
+ this.response = Preconditions.checkNotNull(response, "response");
+ }
+
+ @Override
+ public String toString() {
+ return "GS4QueryEvent{" +
+ "queryType=" + queryType +
+ ", querierAddress=" + querierAddress +
+ ", response=" + response +
+ '}';
+ }
+
+ @NotNull
+ @Override
+ public HandlerList getHandlers() {
+ return handlers;
+ }
+
+ @NotNull
+ public static HandlerList getHandlerList() {
+ return handlers;
+ }
+
+ /**
+ * The type of query
+ */
+ public enum QueryType {
+ /**
+ * Basic query asks only a subset of information, such as motd, game type (hardcoded to <pre>MINECRAFT</pre>), map,
+ * current players, max players, server port and server motd
+ */
+ BASIC,
+
+ /**
+ * Full query asks pretty much everything present on this event (only hardcoded values cannot be modified here).
+ */
+ FULL
+ ;
+ }
+
+ public final static class QueryResponse {
+ private final String motd;
+ private final String gameVersion;
+ private final String map;
+ private final int currentPlayers;
+ private final int maxPlayers;
+ private final String hostname;
+ private final int port;
+ private final Collection<String> players;
+ private final String serverVersion;
+ private final Collection<PluginInformation> plugins;
+
+ private QueryResponse(String motd, String gameVersion, String map, int currentPlayers, int maxPlayers, String hostname, int port, Collection<String> players, String serverVersion, Collection<PluginInformation> plugins) {
+ this.motd = motd;
+ this.gameVersion = gameVersion;
+ this.map = map;
+ this.currentPlayers = currentPlayers;
+ this.maxPlayers = maxPlayers;
+ this.hostname = hostname;
+ this.port = port;
+ this.players = players;
+ this.serverVersion = serverVersion;
+ this.plugins = plugins;
+ }
+
+ /**
+ * Get motd which will be used to reply to the query. By default it is {@link org.bukkit.Server#getMotd()}.
+ * @return motd
+ */
+ @NotNull
+ public String getMotd() {
+ return motd;
+ }
+
+ /**
+ * Get game version which will be used to reply to the query. By default supported Minecraft versions range is sent.
+ * @return game version
+ */
+ @NotNull
+ public String getGameVersion() {
+ return gameVersion;
+ }
+
+ /**
+ * Get map name which will be used to reply to the query. By default {@code world} is sent.
+ * @return map name
+ */
+ @NotNull
+ public String getMap() {
+ return map;
+ }
+
+ /**
+ * Get current online player count which will be used to reply to the query.
+ * @return online player count
+ */
+ public int getCurrentPlayers() {
+ return currentPlayers;
+ }
+
+ /**
+ * Get max player count which will be used to reply to the query.
+ * @return max player count
+ */
+ public int getMaxPlayers() {
+ return maxPlayers;
+ }
+
+ /**
+ * Get server (public facing) hostname
+ * @return server hostname
+ */
+ @NotNull
+ public String getHostname() {
+ return hostname;
+ }
+
+ /**
+ * Get server (public facing) port
+ * @return server port
+ */
+ public int getPort() {
+ return port;
+ }
+
+ /**
+ * Get collection of players which will be used to reply to the query.
+ * @return collection of players
+ */
+ @NotNull
+ public Collection<String> getPlayers() {
+ return players;
+ }
+
+ /**
+ * Get server software (name and version) which will be used to reply to the query.
+ * @return server software
+ */
+ @NotNull
+ public String getServerVersion() {
+ return serverVersion;
+ }
+
+ /**
+ * Get list of plugins which will be used to reply to the query.
+ * @return collection of plugins
+ */
+ @NotNull
+ public Collection<PluginInformation> getPlugins() {
+ return plugins;
+ }
+
+
+ /**
+ * Creates a new {@link Builder} instance from data represented by this response
+ * @return {@link QueryResponse} builder
+ */
+ @NotNull
+ public Builder toBuilder() {
+ return QueryResponse.builder()
+ .motd(getMotd())
+ .gameVersion(getGameVersion())
+ .map(getMap())
+ .currentPlayers(getCurrentPlayers())
+ .maxPlayers(getMaxPlayers())
+ .hostname(getHostname())
+ .port(getPort())
+ .players(getPlayers())
+ .serverVersion(getServerVersion())
+ .plugins(getPlugins());
+ }
+
+ /**
+ * Creates a new {@link Builder} instance
+ * @return {@link QueryResponse} builder
+ */
+ @NotNull
+ public static Builder builder() {
+ return new Builder();
+ }
+
+ /**
+ * A builder for {@link QueryResponse} objects.
+ */
+ public static final class Builder {
+ private String motd;
+ private String gameVersion;
+ private String map;
+ private String hostname;
+ private String serverVersion;
+
+ private int currentPlayers;
+ private int maxPlayers;
+ private int port;
+
+ private List<String> players = new ArrayList<>();
+ private List<PluginInformation> plugins = new ArrayList<>();
+
+ private Builder() {}
+
+ @NotNull
+ public Builder motd(@NotNull String motd) {
+ this.motd = Preconditions.checkNotNull(motd, "motd");
+ return this;
+ }
+
+ @NotNull
+ public Builder gameVersion(@NotNull String gameVersion) {
+ this.gameVersion = Preconditions.checkNotNull(gameVersion, "gameVersion");
+ return this;
+ }
+
+ @NotNull
+ public Builder map(@NotNull String map) {
+ this.map = Preconditions.checkNotNull(map, "map");
+ return this;
+ }
+
+ @NotNull
+ public Builder currentPlayers(int currentPlayers) {
+ Preconditions.checkArgument(currentPlayers >= 0, "currentPlayers cannot be negative");
+ this.currentPlayers = currentPlayers;
+ return this;
+ }
+
+ @NotNull
+ public Builder maxPlayers(int maxPlayers) {
+ Preconditions.checkArgument(maxPlayers >= 0, "maxPlayers cannot be negative");
+ this.maxPlayers = maxPlayers;
+ return this;
+ }
+
+ @NotNull
+ public Builder hostname(@NotNull String hostname) {
+ this.hostname = Preconditions.checkNotNull(hostname, "hostname");
+ return this;
+ }
+
+ @NotNull
+ public Builder port(int port) {
+ Preconditions.checkArgument(port >= 1 && port <= 65535, "port must be between 1-65535");
+ this.port = port;
+ return this;
+ }
+
+ @NotNull
+ public Builder players(@NotNull Collection<String> players) {
+ this.players.addAll(Preconditions.checkNotNull(players, "players"));
+ return this;
+ }
+
+ @NotNull
+ public Builder players(@NotNull String... players) {
+ this.players.addAll(Arrays.asList(Preconditions.checkNotNull(players, "players")));
+ return this;
+ }
+
+ @NotNull
+ public Builder clearPlayers() {
+ this.players.clear();
+ return this;
+ }
+
+ @NotNull
+ public Builder serverVersion(@NotNull String serverVersion) {
+ this.serverVersion = Preconditions.checkNotNull(serverVersion, "serverVersion");
+ return this;
+ }
+
+ @NotNull
+ public Builder plugins(@NotNull Collection<PluginInformation> plugins) {
+ this.plugins.addAll(Preconditions.checkNotNull(plugins, "plugins"));
+ return this;
+ }
+
+ @NotNull
+ public Builder plugins(@NotNull PluginInformation... plugins) {
+ this.plugins.addAll(Arrays.asList(Preconditions.checkNotNull(plugins, "plugins")));
+ return this;
+ }
+
+ @NotNull
+ public Builder clearPlugins() {
+ this.plugins.clear();
+ return this;
+ }
+
+ /**
+ * Builds new {@link QueryResponse} with supplied data
+ * @return response
+ */
+ @NotNull
+ public QueryResponse build() {
+ return new QueryResponse(
+ Preconditions.checkNotNull(motd, "motd"),
+ Preconditions.checkNotNull(gameVersion, "gameVersion"),
+ Preconditions.checkNotNull(map, "map"),
+ currentPlayers,
+ maxPlayers,
+ Preconditions.checkNotNull(hostname, "hostname"),
+ port,
+ ImmutableList.copyOf(players),
+ Preconditions.checkNotNull(serverVersion, "serverVersion"),
+ ImmutableList.copyOf(plugins)
+ );
+ }
+ }
+
+ /**
+ * Plugin information
+ */
+ public static class PluginInformation {
+ private String name;
+ private String version;
+
+ public PluginInformation(@NotNull String name, @NotNull String version) {
+ this.name = Preconditions.checkNotNull(name, "name");
+ this.version = Preconditions.checkNotNull(version, "version");
+ }
+
+ @NotNull
+ public String getName() {
+ return name;
+ }
+
+ public void setName(@NotNull String name) {
+ this.name = name;
+ }
+
+ public void setVersion(@NotNull String version) {
+ this.version = version;
+ }
+
+ @NotNull
+ public String getVersion() {
+ return version;
+ }
+
+ @NotNull
+ public static PluginInformation of(@NotNull String name, @NotNull String version) {
+ return new PluginInformation(name, version);
+ }
+ }
+ }
+}
--
2.21.0

220
Spigot-Server-Patches/0426-Fire-event-on-GS4-query.patch Normal file
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@ -0,0 +1,220 @@
From 7ec017a7334afb1f9abf3e69d755fdc797ce68ed Mon Sep 17 00:00:00 2001
From: Mark Vainomaa <mikroskeem@mikroskeem.eu>
Date: Sun, 17 Mar 2019 21:46:56 +0200
Subject: [PATCH] Fire event on GS4 query
diff --git a/src/main/java/net/minecraft/server/RemoteConnectionThread.java b/src/main/java/net/minecraft/server/RemoteConnectionThread.java
index d875b799ac..bcc36bbbfa 100644
--- a/src/main/java/net/minecraft/server/RemoteConnectionThread.java
+++ b/src/main/java/net/minecraft/server/RemoteConnectionThread.java
@@ -15,7 +15,7 @@ public abstract class RemoteConnectionThread implements Runnable {
private static final Logger h = LogManager.getLogger();
private static final AtomicInteger i = new AtomicInteger(0);
protected boolean a;
- protected IMinecraftServer b;
+ protected IMinecraftServer b; protected IMinecraftServer getServer() { return b; } // Paper - OBFHELPER
protected final String c;
protected Thread d;
protected int e = 5;
@@ -58,6 +58,7 @@ public abstract class RemoteConnectionThread implements Runnable {
this.b.f(s);
}
+ protected int getPlayerCount() { return d(); } // Paper - OBFHELPER
protected int d() {
return this.b.getPlayerCount();
}
diff --git a/src/main/java/net/minecraft/server/RemoteStatusListener.java b/src/main/java/net/minecraft/server/RemoteStatusListener.java
index 7dd81564a2..fd981931b0 100644
--- a/src/main/java/net/minecraft/server/RemoteStatusListener.java
+++ b/src/main/java/net/minecraft/server/RemoteStatusListener.java
@@ -21,19 +21,19 @@ public class RemoteStatusListener extends RemoteConnectionThread {
private long h;
private int i;
- private final int j;
- private final int k;
- private final String l;
- private final String m;
+ private final int j; private int getServerPort() { return j; } // Paper - OBFHELPER
+ private final int k; private int getMaxPlayers() { return k; } // Paper - OBFHELPER
+ private final String l; private String getMotd() { return l; } // Paper - OBFHELPER
+ private final String m; private String getWorldName() { return m; } // Paper - OBFHELPER
private DatagramSocket n;
private final byte[] o = new byte[1460];
private DatagramPacket p;
private final Map<SocketAddress, String> q;
- private String r;
+ private String r; private String getServerHost() { return r; } // Paper - OBFHELPER
private String s;
private final Map<SocketAddress, RemoteStatusListener.RemoteStatusChallenge> t;
private final long u;
- private final RemoteStatusReply v;
+ private final RemoteStatusReply v; private RemoteStatusReply getCachedFullResponse() { return v; } // Paper - OBFHELPER
private long w;
public RemoteStatusListener(IMinecraftServer iminecraftserver) {
@@ -99,6 +99,7 @@ public class RemoteStatusListener extends RemoteConnectionThread {
remotestatusreply.a((int) 0);
remotestatusreply.a(this.a(datagrampacket.getSocketAddress()));
+ /* Paper start - GS4 Query event
remotestatusreply.a(this.l);
remotestatusreply.a("SMP");
remotestatusreply.a(this.m);
@@ -106,6 +107,31 @@ public class RemoteStatusListener extends RemoteConnectionThread {
remotestatusreply.a(Integer.toString(this.k));
remotestatusreply.a((short) this.j);
remotestatusreply.a(this.r);
+ */
+ com.destroystokyo.paper.event.server.GS4QueryEvent.QueryType queryType =
+ com.destroystokyo.paper.event.server.GS4QueryEvent.QueryType.BASIC;
+ com.destroystokyo.paper.event.server.GS4QueryEvent.QueryResponse queryResponse = com.destroystokyo.paper.event.server.GS4QueryEvent.QueryResponse.builder()
+ .motd(this.getMotd())
+ .map(this.getWorldName())
+ .currentPlayers(this.getPlayerCount())
+ .maxPlayers(this.getMaxPlayers())
+ .port(this.getServerPort())
+ .hostname(this.getServerHost())
+ .gameVersion(this.getServer().getVersion())
+ .serverVersion(org.bukkit.Bukkit.getServer().getName() + " on " + org.bukkit.Bukkit.getServer().getBukkitVersion())
+ .build();
+ com.destroystokyo.paper.event.server.GS4QueryEvent queryEvent =
+ new com.destroystokyo.paper.event.server.GS4QueryEvent(queryType, datagrampacket.getAddress(), queryResponse);
+ queryEvent.callEvent();
+ queryResponse = queryEvent.getResponse();
+ remotestatusreply.writeString(queryResponse.getMotd());
+ remotestatusreply.writeString("SMP");
+ remotestatusreply.writeString(queryResponse.getMap());
+ remotestatusreply.writeString(Integer.toString(queryResponse.getCurrentPlayers()));
+ remotestatusreply.writeString(Integer.toString(queryResponse.getMaxPlayers()));
+ remotestatusreply.writeShort((short) queryResponse.getPort());
+ remotestatusreply.writeString(queryResponse.getHostname());
+ // Paper end
this.a(remotestatusreply.a(), datagrampacket);
this.a("Status [" + socketaddress + "]");
}
@@ -142,6 +168,7 @@ public class RemoteStatusListener extends RemoteConnectionThread {
this.v.a("splitnum");
this.v.a((int) 128);
this.v.a((int) 0);
+ /* Paper start - GS4 Query event
this.v.a("hostname");
this.v.a(this.l);
this.v.a("gametype");
@@ -177,6 +204,79 @@ public class RemoteStatusListener extends RemoteConnectionThread {
}
this.v.a((int) 0);
+ */
+ // Pack plugins
+ java.util.List<com.destroystokyo.paper.event.server.GS4QueryEvent.QueryResponse.PluginInformation> plugins = java.util.Collections.emptyList();
+ org.bukkit.plugin.Plugin[] bukkitPlugins;
+ if(((DedicatedServer) this.getServer()).server.getQueryPlugins() && (bukkitPlugins = org.bukkit.Bukkit.getPluginManager().getPlugins()).length > 0) {
+ plugins = java.util.stream.Stream.of(bukkitPlugins)
+ .map(plugin -> com.destroystokyo.paper.event.server.GS4QueryEvent.QueryResponse.PluginInformation.of(plugin.getName(), plugin.getDescription().getVersion()))
+ .collect(java.util.stream.Collectors.toList());
+ }
+
+ com.destroystokyo.paper.event.server.GS4QueryEvent.QueryResponse queryResponse = com.destroystokyo.paper.event.server.GS4QueryEvent.QueryResponse.builder()
+ .motd(this.getMotd())
+ .map(this.getWorldName())
+ .currentPlayers(this.getPlayerCount())
+ .maxPlayers(this.getMaxPlayers())
+ .port(this.getServerPort())
+ .hostname(this.getServerHost())
+ .plugins(plugins)
+ .players(this.getServer().getPlayers())
+ .gameVersion(this.getServer().getVersion())
+ .serverVersion(org.bukkit.Bukkit.getServer().getName() + " on " + org.bukkit.Bukkit.getServer().getBukkitVersion())
+ .build();
+ com.destroystokyo.paper.event.server.GS4QueryEvent.QueryType queryType =
+ com.destroystokyo.paper.event.server.GS4QueryEvent.QueryType.FULL;
+ com.destroystokyo.paper.event.server.GS4QueryEvent queryEvent =
+ new com.destroystokyo.paper.event.server.GS4QueryEvent(queryType, datagrampacket.getAddress(), queryResponse);
+ queryEvent.callEvent();
+ queryResponse = queryEvent.getResponse();
+ this.getCachedFullResponse().writeString("hostname");
+ this.getCachedFullResponse().writeString(queryResponse.getMotd());
+ this.getCachedFullResponse().writeString("gametype");
+ this.getCachedFullResponse().writeString("SMP");
+ this.getCachedFullResponse().writeString("game_id");
+ this.getCachedFullResponse().writeString("MINECRAFT");
+ this.getCachedFullResponse().writeString("version");
+ this.getCachedFullResponse().writeString(queryResponse.getGameVersion());
+ this.getCachedFullResponse().writeString("plugins");
+ java.lang.StringBuilder pluginsString = new java.lang.StringBuilder();
+ pluginsString.append(queryResponse.getServerVersion());
+ if(!queryResponse.getPlugins().isEmpty()) {
+ pluginsString.append(": ");
+ Iterator<com.destroystokyo.paper.event.server.GS4QueryEvent.QueryResponse.PluginInformation> iter = queryResponse.getPlugins().iterator();
+ while(iter.hasNext()) {
+ com.destroystokyo.paper.event.server.GS4QueryEvent.QueryResponse.PluginInformation info = iter.next();
+ pluginsString.append(info.getName());
+ if (info.getVersion() != null) {
+ pluginsString.append(' ').append(info.getVersion().replaceAll(";", ","));
+ }
+ if (iter.hasNext()) {
+ pluginsString.append(';').append(' ');
+ }
+ }
+ }
+ this.getCachedFullResponse().writeString(pluginsString.toString());
+ this.getCachedFullResponse().writeString("map");
+ this.getCachedFullResponse().writeString(queryResponse.getMap());
+ this.getCachedFullResponse().writeString("numplayers");
+ this.getCachedFullResponse().writeString(Integer.toString(queryResponse.getCurrentPlayers()));
+ this.getCachedFullResponse().writeString("maxplayers");
+ this.getCachedFullResponse().writeString(Integer.toString(queryResponse.getMaxPlayers()));
+ this.getCachedFullResponse().writeString("hostport");
+ this.getCachedFullResponse().writeString(Integer.toString(queryResponse.getPort()));
+ this.getCachedFullResponse().writeString("hostip");
+ this.getCachedFullResponse().writeString(queryResponse.getHostname());
+ // The "meaningless data" start, copied from above
+ this.getCachedFullResponse().writeInt(0);
+ this.getCachedFullResponse().writeInt(1);
+ this.getCachedFullResponse().writeString("player_");
+ this.getCachedFullResponse().writeInt(0);
+ // "Meaningless data" end
+ queryResponse.getPlayers().forEach(this.getCachedFullResponse()::writeStringUnchecked);
+ this.getCachedFullResponse().writeInt(0);
+ // Paper end
return this.v.a();
}
}
diff --git a/src/main/java/net/minecraft/server/RemoteStatusReply.java b/src/main/java/net/minecraft/server/RemoteStatusReply.java
index 848b5c3f0e..9e8c8b3df2 100644
--- a/src/main/java/net/minecraft/server/RemoteStatusReply.java
+++ b/src/main/java/net/minecraft/server/RemoteStatusReply.java
@@ -18,15 +18,27 @@ public class RemoteStatusReply {
this.b.write(abyte, 0, abyte.length);
}
+ public void writeString(String string) throws IOException { a(string); } // Paper - OBFHELPER
public void a(String s) throws IOException {
this.b.writeBytes(s);
this.b.write(0);
}
+ // Paper start - unchecked exception variant to use in Stream API
+ public void writeStringUnchecked(String string) {
+ try {
+ writeString(string);
+ } catch (IOException e) {
+ com.destroystokyo.paper.util.SneakyThrow.sneaky(e);
+ }
+ }
+ // Paper end
+ public void writeInt(int i) throws IOException { a(i); } // Paper - OBFHELPER
public void a(int i) throws IOException {
this.b.write(i);
}
+ public void writeShort(short i) throws IOException { a(i); } // Paper - OBFHELPER
public void a(short short0) throws IOException {
this.b.writeShort(Short.reverseBytes(short0));
}
--
2.21.0