Initial plugin message and forum support for GeyserAddons

connector/src/main/java/org/geysermc/connector/GeyserConnector.java

@@ -40,6 +40,7 @@ import org.geysermc.connector.common.PlatformType;
 import org.geysermc.connector.configuration.GeyserConfiguration;
 import org.geysermc.connector.metrics.Metrics;
 import org.geysermc.connector.network.ConnectorServerEventHandler;
+import org.geysermc.connector.network.addon.AddonListenerRegistry;
 import org.geysermc.connector.network.remote.RemoteServer;
 import org.geysermc.connector.network.session.GeyserSession;
 import org.geysermc.connector.network.translators.BiomeTranslator;
@@ -136,6 +137,7 @@ public class GeyserConnector {
         PotionMixRegistry.init();
         SoundRegistry.init();
         SoundHandlerRegistry.init();
+        AddonListenerRegistry.init();
 
         if (platformType != PlatformType.STANDALONE) {
             DockerCheck.check(bootstrap);

connector/src/main/java/org/geysermc/connector/network/UpstreamPacketHandler.java

@@ -30,6 +30,7 @@ import com.nukkitx.protocol.bedrock.packet.*;
 import org.geysermc.connector.common.AuthType;
 import org.geysermc.connector.configuration.GeyserConfiguration;
 import org.geysermc.connector.GeyserConnector;
+import org.geysermc.connector.network.addon.FormAddonListener;
 import org.geysermc.connector.network.session.GeyserSession;
 import org.geysermc.connector.network.translators.PacketTranslatorRegistry;
 import org.geysermc.connector.utils.LoginEncryptionUtils;
@@ -91,8 +92,12 @@ public class UpstreamPacketHandler extends LoggingPacketHandler {
 
     @Override
     public boolean handle(ModalFormResponsePacket packet) {
+        if (packet.getFormId() == LoginEncryptionUtils.AUTH_FORM_ID || packet.getFormId() == LoginEncryptionUtils.AUTH_DETAILS_FORM_ID) {
             return LoginEncryptionUtils.authenticateFromForm(session, connector, packet.getFormId(), packet.getFormData());
         }
+        FormAddonListener.get().handleResponse(this.session, packet);
+        return true;
+    }
 
     private boolean couldLoginUserByName(String bedrockUsername) {
         if (connector.getConfig().getUserAuths() != null) {

connector/src/main/java/org/geysermc/connector/network/addon/AddonListener.java

@@ -0,0 +1,60 @@
+/*
+ * 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.connector.network.addon;
+
+import com.nukkitx.protocol.bedrock.BedrockPacket;
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.geysermc.connector.network.session.GeyserSession;
+
+/**
+ * A listener that listens for plugin messages from
+ * GeyserAddons.
+ */
+@Getter
+@AllArgsConstructor
+public abstract class AddonListener<T extends BedrockPacket> {
+
+    public static final String PLUGIN_MESSAGE_CHANNEL = "geyser:addons";
+
+    private String subChannel;
+
+    /**
+     * Called when a message is received
+     * @param session the session receiving the message
+     * @param message the message
+     */
+    public abstract void onMessageReceive(GeyserSession session, ByteBuf message);
+
+    /**
+     * Handles a response from the given packet.
+     *
+     * @param session the session listening
+     * @param response the response
+     */
+    public abstract void handleResponse(GeyserSession session, T response);
+}

connector/src/main/java/org/geysermc/connector/network/addon/AddonListenerRegistry.java

@@ -0,0 +1,62 @@
+/*
+ * 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.connector.network.addon;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * A registry containing all the {@link AddonListener}s listening
+ * for plugin messages.
+ */
+public class AddonListenerRegistry {
+
+    private static final Map<String, AddonListener<?>> LISTENERS = new HashMap<>();
+
+    private AddonListenerRegistry() {
+    }
+
+    public static void init() {
+        registerListener(FormAddonListener.get());
+    }
+
+    /**
+     * Returns all the {@link AddonListener}s listening for
+     * plugin messages.
+     *
+     * Key: the subchannel the listener is listening on
+     * Value: the {@link AddonListener}
+     *
+     * @return all the {@link AddonListener}s listening for plugin messages.
+     */
+    public static Map<String, AddonListener<?>> getListeners() {
+        return LISTENERS;
+    }
+
+    private static void registerListener(AddonListener<?> listener) {
+        LISTENERS.put(listener.getSubChannel(), listener);
+    }
+}

connector/src/main/java/org/geysermc/connector/network/addon/FormAddonListener.java

@@ -0,0 +1,73 @@
+/*
+ * 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.connector.network.addon;
+
+import com.github.steveice10.mc.protocol.packet.ingame.client.ClientPluginMessagePacket;
+import com.nukkitx.protocol.bedrock.packet.ModalFormRequestPacket;
+import com.nukkitx.protocol.bedrock.packet.ModalFormResponsePacket;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufAllocator;
+import org.geysermc.connector.network.session.GeyserSession;
+import org.geysermc.connector.utils.NetworkUtils;
+
+public class FormAddonListener extends AddonListener<ModalFormResponsePacket> {
+
+    private static final FormAddonListener INSTANCE = new FormAddonListener();
+
+    public static final String NAME = "form";
+
+    public FormAddonListener() {
+        super(NAME);
+    }
+
+    @Override
+    public void onMessageReceive(GeyserSession session, ByteBuf message) {
+        ModalFormRequestPacket packet = new ModalFormRequestPacket();
+        packet.setFormId(message.readInt());
+        packet.setFormData(NetworkUtils.readString(message));
+        session.sendUpstreamPacket(packet);
+    }
+
+    @Override
+    public void handleResponse(GeyserSession session, ModalFormResponsePacket packet) {
+        ByteBuf buffer = ByteBufAllocator.DEFAULT.buffer();
+        try {
+            NetworkUtils.writeString(buffer, this.getSubChannel());
+            buffer.writeInt(packet.getFormId());
+            NetworkUtils.writeString(buffer, packet.getFormData());
+
+            byte[] bytes = new byte[buffer.readableBytes()];
+            buffer.readBytes(bytes);
+            session.sendDownstreamPacket(new ClientPluginMessagePacket(PLUGIN_MESSAGE_CHANNEL, bytes));
+        } finally {
+            buffer.release();
+        }
+    }
+
+    public static FormAddonListener get() {
+        return INSTANCE;
+    }
+}

connector/src/main/java/org/geysermc/connector/network/translators/java/JavaPluginMessageTranslator.java

@@ -25,15 +25,21 @@
 
 package org.geysermc.connector.network.translators.java;
 
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
 import org.geysermc.connector.GeyserConnector;
+import org.geysermc.connector.network.addon.AddonListener;
+import org.geysermc.connector.network.addon.AddonListenerRegistry;
 import org.geysermc.connector.network.session.GeyserSession;
 import org.geysermc.connector.network.translators.PacketTranslator;
 import org.geysermc.connector.network.translators.Translator;
 
 import com.github.steveice10.mc.protocol.packet.ingame.client.ClientPluginMessagePacket;
 import com.github.steveice10.mc.protocol.packet.ingame.server.ServerPluginMessagePacket;
+import org.geysermc.connector.utils.NetworkUtils;
 
 import java.nio.charset.StandardCharsets;
+import java.util.Map;
 
 @Translator(packet = ServerPluginMessagePacket.class)
 public class JavaPluginMessageTranslator extends PacketTranslator<ServerPluginMessagePacket> {
@@ -56,6 +62,23 @@ public class JavaPluginMessageTranslator extends PacketTranslator<ServerPluginMe
                     new ClientPluginMessagePacket(packet.getChannel(), brandData)
             );
         }
+        if (packet.getChannel().equals("minecraft:register")) {
+            session.sendDownstreamPacket(new ClientPluginMessagePacket(packet.getChannel(), AddonListener.PLUGIN_MESSAGE_CHANNEL.getBytes(StandardCharsets.UTF_8)));
+        }
+
+        if (!packet.getChannel().equals(AddonListener.PLUGIN_MESSAGE_CHANNEL)) {
+            return;
+        }
+
+        for (Map.Entry<String, AddonListener<?>> entry : AddonListenerRegistry.getListeners().entrySet()) {
+            ByteBuf buffer = Unpooled.wrappedBuffer(packet.getData());
+            String subChannel = NetworkUtils.readString(buffer);
+            if (!subChannel.equals(entry.getKey())) {
+                continue;
+            }
+
+            entry.getValue().onMessageReceive(session, buffer);
+        }
     }
 
     private static byte[] writeVarInt(int value) {

connector/src/main/java/org/geysermc/connector/utils/LoginEncryptionUtils.java

@@ -152,8 +152,8 @@ public class LoginEncryptionUtils {
         session.sendUpstreamPacketImmediately(packet);
     }
 
-    private static int AUTH_FORM_ID = 1336;
-    private static int AUTH_DETAILS_FORM_ID = 1337;
+    public static int AUTH_FORM_ID = 1336;
+    public static int AUTH_DETAILS_FORM_ID = 1337;
 
     public static void showLoginWindow(GeyserSession session) {
         String userLanguage = session.getClientData().getLanguageCode();

connector/src/main/java/org/geysermc/connector/utils/NetworkUtils.java

@@ -0,0 +1,104 @@
+/*
+ * 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.connector.utils;
+
+import io.netty.buffer.ByteBuf;
+
+import java.nio.charset.StandardCharsets;
+
+public class NetworkUtils {
+
+    public static String readString(ByteBuf buf) {
+        return new String(readByteArray(buf), StandardCharsets.UTF_8);
+    }
+
+    public static void writeString(ByteBuf buf, String string) {
+        writeByteArray(buf, string.getBytes(StandardCharsets.UTF_8));
+    }
+
+    public static byte[] readByteArray(ByteBuf buf) {
+        byte[] bytes = new byte[readUnsignedVarInt(buf)];
+        buf.readBytes(bytes);
+        return bytes;
+    }
+
+    public static void writeByteArray(ByteBuf buf, byte[] bytes) {
+        writeUnsignedVarInt(buf, bytes.length);
+        buf.writeBytes(bytes);
+    }
+
+    public static int readVarInt(ByteBuf buf) {
+        int i = 0, j = 0;
+        while (true) {
+            int k = buf.readByte();
+            i |= (k & 0x7F) << j++ * 7;
+            if (j > 5) {
+                throw new RuntimeException("VarInt was too big!");
+            }
+            if ((k & 0x80) != 128) {
+                break;
+            }
+        }
+        return i;
+    }
+
+    public static void writeVarInt(ByteBuf buf, int value) {
+        while (true) {
+            if ((value & 0xFFFFFF80) == 0) {
+                buf.writeByte(value);
+                return;
+            }
+
+            buf.writeByte(value & 0x7F | 0x80);
+            value >>>= 7;
+        }
+    }
+
+    public static int readUnsignedVarInt(ByteBuf buf) {
+        int i = 0;
+        for (int j = 0; j < 64; j += 7) {
+            final byte b = buf.readByte();
+            i |= (long) (b & 0x7F) << j;
+            if ((b & 0x80) == 0) {
+                return i;
+            }
+        }
+        throw new RuntimeException("Varint was too big!");
+    }
+
+    public static void writeUnsignedVarInt(ByteBuf buf, int value) {
+        long i = value & 0xFFFFFFFFL;
+        while (true) {
+            if ((i & ~0x7FL) == 0) {
+                buf.writeByte((int) i);
+                return;
+            } else {
+                buf.writeByte((byte) ((i & 0x7F) | 0x80));
+                i >>>= 7;
+            }
+        }
+    }
+}