Expand unsupported software checks

api/src/main/java/com/viaversion/viaversion/api/platform/UnsupportedSoftware.java

@@ -22,72 +22,26 @@
  */
 package com.viaversion.viaversion.api.platform;
 
-import java.util.Collections;
-import java.util.List;
-
-public final class UnsupportedSoftware {
-
-    private final String name;
-    private final List<String> classNames;
-    private final String reason;
-
-    public UnsupportedSoftware(String name, List<String> classNames, String reason) {
-        this.name = name;
-        this.classNames = Collections.unmodifiableList(classNames);
-        this.reason = reason;
-    }
-
-    public UnsupportedSoftware(String name, String className, String reason) {
-        this.name = name;
-        this.classNames = Collections.singletonList(className);
-        this.reason = reason;
-    }
+public interface UnsupportedSoftware {
 
     /**
      * Returns the software name.
      *
      * @return software name
      */
-    public String getName() {
-        return name;
-    }
-
-    /**
-     * Returns an immutable list of the fully qualified class name.
-     *
-     * @return immutable list of fully qualified class name
-     */
-    public List<String> getClassNames() {
-        return classNames;
-    }
+    String getName();
 
     /**
      * Returns the reason for being unsupported by Via.
      *
      * @return reason for being unsupported
      */
-    public String getReason() {
-        return reason;
-    }
+    String getReason();
 
     /**
-     * Returns whether at least one of the held class names exists.
+     * Returns whether the unsupported software is present.
      *
-     * @return true if at least one of the classes exists
+     * @return true if the unsupported software is found
      */
-    public boolean findMatch() {
-        for (String className : classNames) {
-            try {
-                Class.forName(className);
-                return true;
-            } catch (ClassNotFoundException ignored) {
-            }
-        }
-        return false;
-    }
-
-    public static final class Reason {
-
-        public static final String DANGEROUS_SERVER_SOFTWARE = "You are using server software that - outside of possibly breaking ViaVersion - can also cause severe damage to your server's integrity as a whole.";
-    }
+    boolean findMatch();
 }

api/src/main/java/com/viaversion/viaversion/api/protocol/ProtocolManager.java

@@ -199,5 +199,5 @@ public interface ProtocolManager {
      * @return new packet wrapper instance
      * @see PacketWrapper#create(PacketType, ByteBuf, UserConnection)
      */
-    PacketWrapper createPacketWrapper(int packetId, ByteBuf buf, UserConnection connection);
+    PacketWrapper createPacketWrapper(int packetId, @Nullable ByteBuf buf, UserConnection connection);
 }

bukkit/src/main/java/com/viaversion/viaversion/ViaVersionPlugin.java

@@ -30,13 +30,14 @@ import com.viaversion.viaversion.bukkit.classgenerator.ClassGenerator;
 import com.viaversion.viaversion.bukkit.commands.BukkitCommandHandler;
 import com.viaversion.viaversion.bukkit.commands.BukkitCommandSender;
 import com.viaversion.viaversion.bukkit.listeners.ProtocolLibEnableListener;
-import com.viaversion.viaversion.bukkit.platform.BukkitViaTask;
 import com.viaversion.viaversion.bukkit.platform.BukkitViaAPI;
 import com.viaversion.viaversion.bukkit.platform.BukkitViaConfig;
 import com.viaversion.viaversion.bukkit.platform.BukkitViaInjector;
 import com.viaversion.viaversion.bukkit.platform.BukkitViaLoader;
+import com.viaversion.viaversion.bukkit.platform.BukkitViaTask;
 import com.viaversion.viaversion.bukkit.util.NMSUtil;
 import com.viaversion.viaversion.dump.PluginInfo;
+import com.viaversion.viaversion.unsupported.UnsupportedSoftwareImpl;
 import com.viaversion.viaversion.util.GsonUtil;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
@@ -291,7 +292,11 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaPlatform<Player>
     @Override
     public final Collection<UnsupportedSoftware> getUnsupportedSoftwareClasses() {
         List<UnsupportedSoftware> list = new ArrayList<>(ViaPlatform.super.getUnsupportedSoftwareClasses());
-        list.add(new UnsupportedSoftware("Yatopia", "org.yatopiamc.yatopia.server.YatopiaConfig", UnsupportedSoftware.Reason.DANGEROUS_SERVER_SOFTWARE));
+        list.add(new UnsupportedSoftwareImpl.Builder().name("Yatopia").reason(UnsupportedSoftwareImpl.Reason.DANGEROUS_SERVER_SOFTWARE)
+                .addClassName("org.yatopiamc.yatopia.server.YatopiaConfig")
+                .addClassName("net.yatopia.api.event.PlayerAttackEntityEvent")
+                .addClassName("yatopiamc.org.yatopia.server.YatopiaConfig") // Only the best kind of software relocates its own classes to hide itself :tinfoilhat:
+                .addMethod("org.bukkit.Server", "getLastTickTime").build());
         return Collections.unmodifiableList(list);
     }
 

common/src/main/java/com/viaversion/viaversion/protocol/ProtocolManagerImpl.java

@@ -417,7 +417,7 @@ public class ProtocolManagerImpl implements ProtocolManager {
     }
 
     @Override
-    public PacketWrapper createPacketWrapper(int packetId, ByteBuf buf, UserConnection connection) {
+    public PacketWrapper createPacketWrapper(int packetId, @Nullable ByteBuf buf, UserConnection connection) {
         return new PacketWrapperImpl(packetId, buf, connection);
     }
 

common/src/main/java/com/viaversion/viaversion/protocol/packet/PacketWrapperImpl.java

@@ -34,6 +34,7 @@ import com.viaversion.viaversion.util.Pair;
 import com.viaversion.viaversion.util.PipelineUtil;
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelFuture;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 import java.io.IOException;
 import java.util.ArrayDeque;
@@ -52,8 +53,8 @@ public class PacketWrapperImpl implements PacketWrapper {
     private final Deque<Pair<Type, Object>> readableObjects = new ArrayDeque<>();
     private final List<Pair<Type, Object>> packetValues = new ArrayList<>();
 
-    public PacketWrapperImpl(int packetID, ByteBuf inputBuffer, UserConnection userConnection) {
-        this.id = packetID;
+    public PacketWrapperImpl(int packetId, @Nullable ByteBuf inputBuffer, UserConnection userConnection) {
+        this.id = packetId;
         this.inputBuffer = inputBuffer;
         this.userConnection = userConnection;
     }
@@ -426,7 +427,8 @@ public class PacketWrapperImpl implements PacketWrapper {
     public void setId(int id) {
         this.id = id;
     }
-    
+
+    @Nullable
     public ByteBuf getInputBuffer() {
         return inputBuffer;
     }

common/src/main/java/com/viaversion/viaversion/unsupported/UnsupportedMethods.java

@@ -0,0 +1,49 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2021 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.unsupported;
+
+import java.lang.reflect.Method;
+import java.util.Collections;
+import java.util.Set;
+
+public final class UnsupportedMethods {
+
+    private final String className;
+    private final Set<String> methodNames;
+
+    public UnsupportedMethods(String className, Set<String> methodNames) {
+        this.className = className;
+        this.methodNames = Collections.unmodifiableSet(methodNames);
+    }
+
+    public String getClassName() {
+        return className;
+    }
+
+    public final boolean findMatch() {
+        try {
+            for (Method method : Class.forName(className).getDeclaredMethods()) {
+                if (methodNames.contains(method.getName())) {
+                    return true;
+                }
+            }
+        } catch (ClassNotFoundException ignored) {
+        }
+        return false;
+    }
+}

common/src/main/java/com/viaversion/viaversion/unsupported/UnsupportedSoftwareImpl.java

@@ -0,0 +1,113 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2021 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.unsupported;
+
+import com.google.common.base.Preconditions;
+import com.viaversion.viaversion.api.platform.UnsupportedSoftware;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+
+public final class UnsupportedSoftwareImpl implements UnsupportedSoftware {
+
+    private final String name;
+    private final List<String> classNames;
+    private final List<UnsupportedMethods> methods;
+    private final String reason;
+
+    public UnsupportedSoftwareImpl(String name, List<String> classNames, List<UnsupportedMethods> methods, String reason) {
+        this.name = name;
+        this.classNames = Collections.unmodifiableList(classNames);
+        this.methods = Collections.unmodifiableList(methods);
+        this.reason = reason;
+    }
+
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public String getReason() {
+        return reason;
+    }
+
+    @Override
+    public boolean findMatch() {
+        for (String className : classNames) {
+            try {
+                Class.forName(className);
+                return true;
+            } catch (ClassNotFoundException ignored) {
+            }
+        }
+        for (UnsupportedMethods method : methods) {
+            if (method.findMatch()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static final class Builder {
+
+        private final List<String> classNames = new ArrayList<>();
+        private final List<UnsupportedMethods> methods = new ArrayList<>();
+        private String name;
+        private String reason;
+
+        public Builder name(String name) {
+            this.name = name;
+            return this;
+        }
+
+        public Builder reason(String reason) {
+            this.reason = reason;
+            return this;
+        }
+
+        public Builder addMethod(String className, String methodName) {
+            methods.add(new UnsupportedMethods(className, Collections.singleton(methodName)));
+            return this;
+        }
+
+        public Builder addMethods(String className, String... methodNames) {
+            methods.add(new UnsupportedMethods(className, new HashSet<>(Arrays.asList(methodNames))));
+            return this;
+        }
+
+        public Builder addClassName(String className) {
+            classNames.add(className);
+            return this;
+        }
+
+        public UnsupportedSoftware build() {
+            Preconditions.checkNotNull(name);
+            Preconditions.checkNotNull(reason);
+            return new UnsupportedSoftwareImpl(name, classNames, methods, reason);
+        }
+    }
+
+    public static final class Reason {
+
+        public static final String DANGEROUS_SERVER_SOFTWARE = "You are using server software that - outside of possibly breaking ViaVersion - can also cause severe damage to your server's integrity as a whole.";
+    }
+}