Rewrite Ping Passthrough (#468)

* Fix ping passthrough on BungeeCord

* Initial implementation of direct ping passthrough

* Finished implementation of direct ping passthrough

* Remove test for something else entirely

* Fix standalone

* Add config option for ping passthrough interval

* Use GeyserPingInfo to reduce methods

* Add querying; modify ping passthrough

* Add separate config options for passthrough MOTD and player counts

* Convert all plugin bootstraps to use internal ping events to that other plugins can handle ping modifications

* Small changes

* Fix invalid packet spawm

* Add legacy ping passthrough option

* Fix BungeeCord

* Proper UUID for BungeeCord, thanks @theminecoder

* Update config version and messages

* Merge master... again

* Add missing javadocs and minor changes

Co-authored-by: James Harrison <james@fasttortoise.co.uk>
Co-authored-by: theminecoder <theminecoder.dev@gmail.com>
Co-authored-by: Redned <redned235@gmail.com>

bootstrap/velocity/src/main/java/org/geysermc/platform/velocity/GeyserVelocityConfiguration.java

@@ -55,8 +55,17 @@ public class GeyserVelocityConfiguration implements GeyserConfiguration {
     @JsonProperty("command-suggestions")
     private boolean commandSuggestions;
 
-    @JsonProperty("ping-passthrough")
-    private boolean pingPassthrough;
+    @JsonProperty("passthrough-motd")
+    private boolean isPassthroughMotd;
+
+    @JsonProperty("passthrough-player-counts")
+    private boolean isPassthroughPlayerCounts;
+
+    @JsonProperty("legacy-ping-passthrough")
+    private boolean isLegacyPingPassthrough;
+
+    @JsonProperty("ping-passthrough-interval")
+    private int pingPassthroughInterval;
 
     @JsonProperty("max-players")
     private int maxPlayers;

bootstrap/velocity/src/main/java/org/geysermc/platform/velocity/GeyserVelocityPingPassthrough.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2019-2020 GeyserMC. http://geysermc.org
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in
+ *  all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ *  THE SOFTWARE.
+ *
+ *  @author GeyserMC
+ *  @link https://github.com/GeyserMC/Geyser
+ *
+ */
+
+package org.geysermc.platform.velocity;
+
+import com.velocitypowered.api.event.proxy.ProxyPingEvent;
+import com.velocitypowered.api.network.ProtocolVersion;
+import com.velocitypowered.api.proxy.InboundConnection;
+import com.velocitypowered.api.proxy.ProxyServer;
+import com.velocitypowered.api.proxy.server.ServerPing;
+import lombok.AllArgsConstructor;
+import net.kyori.text.TextComponent;
+import net.kyori.text.serializer.legacy.LegacyComponentSerializer;
+import org.geysermc.common.ping.GeyserPingInfo;
+import org.geysermc.connector.ping.IGeyserPingPassthrough;
+
+import java.net.Inet4Address;
+import java.net.InetSocketAddress;
+import java.util.Optional;
+import java.util.concurrent.ExecutionException;
+
+@AllArgsConstructor
+public class GeyserVelocityPingPassthrough implements IGeyserPingPassthrough {
+
+    private static final GeyserInboundConnection FAKE_INBOUND_CONNECTION = new GeyserInboundConnection();
+
+    private final ProxyServer server;
+
+    @Override
+    public GeyserPingInfo getPingInformation() {
+        ProxyPingEvent event;
+        try {
+            event = server.getEventManager().fire(new ProxyPingEvent(FAKE_INBOUND_CONNECTION, ServerPing.builder()
+                    .description(server.getConfiguration().getMotdComponent()).onlinePlayers(server.getPlayerCount())
+                    .maximumPlayers(server.getConfiguration().getShowMaxPlayers()).build())).get();
+        } catch (ExecutionException | InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        GeyserPingInfo geyserPingInfo = new GeyserPingInfo(
+                LegacyComponentSerializer.INSTANCE.serialize(event.getPing().getDescription(), '§'),
+                event.getPing().getPlayers().orElseThrow(IllegalStateException::new).getOnline(),
+                event.getPing().getPlayers().orElseThrow(IllegalStateException::new).getMax()
+        );
+        event.getPing().getPlayers().get().getSample().forEach(player -> {
+            geyserPingInfo.addPlayer(player.getName());
+        });
+        return geyserPingInfo;
+    }
+
+    private static class GeyserInboundConnection implements InboundConnection {
+
+        private static final InetSocketAddress FAKE_REMOTE = new InetSocketAddress(Inet4Address.getLoopbackAddress(), 69);
+
+        @Override
+        public InetSocketAddress getRemoteAddress() {
+            return FAKE_REMOTE;
+        }
+
+        @Override
+        public Optional<InetSocketAddress> getVirtualHost() {
+            return Optional.empty();
+        }
+
+        @Override
+        public boolean isActive() {
+            return false;
+        }
+
+        @Override
+        public ProtocolVersion getProtocolVersion() {
+            return ProtocolVersion.MAXIMUM_VERSION;
+        }
+    }
+
+}

bootstrap/velocity/src/main/java/org/geysermc/platform/velocity/GeyserVelocityPlugin.java

@@ -38,6 +38,8 @@ import org.geysermc.common.PlatformType;
 import org.geysermc.connector.GeyserConfiguration;
 import org.geysermc.connector.GeyserConnector;
 import org.geysermc.connector.bootstrap.GeyserBootstrap;
+import org.geysermc.connector.ping.GeyserLegacyPingPassthrough;
+import org.geysermc.connector.ping.IGeyserPingPassthrough;
 import org.geysermc.connector.utils.FileUtils;
 import org.geysermc.platform.velocity.command.GeyserVelocityCommandExecutor;
 import org.geysermc.platform.velocity.command.GeyserVelocityCommandManager;
@@ -63,6 +65,7 @@ public class GeyserVelocityPlugin implements GeyserBootstrap {
     private GeyserVelocityCommandManager geyserCommandManager;
     private GeyserVelocityConfiguration geyserConfig;
     private GeyserVelocityLogger geyserLogger;
+    private IGeyserPingPassthrough geyserPingPassthrough;
 
     private GeyserConnector connector;
 
@@ -99,6 +102,11 @@ public class GeyserVelocityPlugin implements GeyserBootstrap {
 
         this.geyserCommandManager = new GeyserVelocityCommandManager(connector);
         this.commandManager.register(new GeyserVelocityCommandExecutor(connector), "geyser");
+        if (geyserConfig.isLegacyPingPassthrough()) {
+            this.geyserPingPassthrough = GeyserLegacyPingPassthrough.init(connector);
+        } else {
+            this.geyserPingPassthrough = new GeyserVelocityPingPassthrough(proxyServer);
+        }
     }
 
     @Override
@@ -121,6 +129,11 @@ public class GeyserVelocityPlugin implements GeyserBootstrap {
         return this.geyserCommandManager;
     }
 
+    @Override
+    public IGeyserPingPassthrough getGeyserPingPassthrough() {
+        return geyserPingPassthrough;
+    }
+
     @Subscribe
     public void onInit(ProxyInitializeEvent event) {
         onEnable();