src/de/steamwar/bungeecore/BungeeCore.java

@@ -70,6 +70,7 @@ public class BungeeCore extends Plugin {
     @Override
     public void onEnable(){
         getProxy().registerChannel("sw:bridge");
+        getProxy().registerChannel("fabricmodsender:mods");
 
         setInstance(this);
         loadConfig();
@@ -86,6 +87,7 @@ public class BungeeCore extends Plugin {
         new ModLoaderBlocker();
         new WorldDownloader();
         new BrandListener();
+        new Fabric();
 
         new Node.LocalNode();
         //new Node.RemoteNode("lx");

src/de/steamwar/bungeecore/listeners/mods/Fabric.java

@@ -0,0 +1,45 @@
+package de.steamwar.bungeecore.listeners.mods;
+
+import de.steamwar.bungeecore.listeners.BasicListener;
+import de.steamwar.bungeecore.sql.Mod;
+import io.netty.util.internal.StringUtil;
+import net.md_5.bungee.api.connection.PendingConnection;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.event.PluginMessageEvent;
+import net.md_5.bungee.event.EventHandler;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+public class Fabric extends BasicListener {
+
+    @EventHandler
+    public void onPluginMessageEvent(PluginMessageEvent e){
+        if(!e.getTag().equals("fabricmodsender:mods"))
+            return;
+
+        String dataString = new String(e.getData()).substring(2);
+        dataString = StringUtils.chop(dataString);
+        char x = 34;
+        dataString = dataString.replace(x, ' ');
+        dataString = dataString.replaceAll("\\s+","");
+
+        String[] parts = dataString.split(",");
+
+        List<Mod> mods = new ArrayList<>();
+
+        for(String mod : parts) {
+            mods.add(Mod.get(mod, Mod.Platform.FABRIC));
+        }
+
+        if (e.getSender() instanceof ProxiedPlayer) {
+            ProxiedPlayer player = (ProxiedPlayer) e.getSender();
+
+            if(!Utils.handleMods(player, mods))
+                player.disconnect("");
+        }
+    }
+
+}

src/de/steamwar/bungeecore/sql/Mod.java

@@ -61,7 +61,8 @@ public class Mod {
 
     public enum Platform{
         FORGE(0),
-        LABYMOD(1);
+        LABYMOD(1),
+        FABRIC(2);
 
         Platform(int value){
             this.value = value;