zeta compatibility fixed

src/main/java/org/adde0109/ambassador/forge/ForgeHandshake.java

@@ -1,5 +1,7 @@
 package org.adde0109.ambassador.forge;
 
+import org.adde0109.ambassador.forge.packet.Context;
+import org.adde0109.ambassador.forge.packet.GenericForgeLoginWrapperPacket;
 import org.adde0109.ambassador.forge.packet.ModListReplyPacket;
 import org.adde0109.ambassador.forge.packet.RegistryPacket;
 
@@ -11,6 +13,7 @@ import java.util.zip.Checksum;
 public class ForgeHandshake {
     private ModListReplyPacket modListReplyPacket;
     private final Map<String, Long> registries = new HashMap<>();
+    public GenericForgeLoginWrapperPacket<Context.ClientContext> zetaFlagsPacket;
 
     public ForgeHandshake() {
     }

src/main/java/org/adde0109/ambassador/forge/ForgeHandshakeUtils.java

@@ -122,17 +122,17 @@ public class ForgeHandshakeUtils {
     static enum ThirdPartyChannel {
       SILENTGEAR_NETWORK {
         @Override
-        public ThirdPartyRegistryUtils.ACKPacket generateResponsePacket(Context.ClientContext context) {
+        public IForgeLoginWrapperPacket<Context.ClientContext> generateResponsePacket(Context.ClientContext context, ForgeHandshake completed) {
           return new ACKPacket(context, 3);
         }
       },
       ZETA_MAIN {
         @Override
-        public ThirdPartyRegistryUtils.ACKPacket generateResponsePacket(Context.ClientContext context) {
+        public IForgeLoginWrapperPacket<Context.ClientContext> generateResponsePacket(Context.ClientContext context, ForgeHandshake completed) {
-          return new ACKPacket(context, 99);
+          return new GenericForgeLoginWrapperPacket<Context.ClientContext>(completed.zetaFlagsPacket.getContent(), context);
         }
       };
-      abstract public ACKPacket generateResponsePacket(Context.ClientContext context);
+      abstract public IForgeLoginWrapperPacket<Context.ClientContext> generateResponsePacket(Context.ClientContext context, ForgeHandshake completed);
     }
 
     static boolean isThirdPartyPacket(GenericForgeLoginWrapperPacket<Context> packet) {

src/main/java/org/adde0109/ambassador/forge/VelocityForgeBackendConnectionPhase.java

@@ -139,7 +139,11 @@ public enum VelocityForgeBackendConnectionPhase implements BackendConnectionPhas
         server.getConnection().write(new ACKPacket(Context.fromContext(message.getContext(), true)));
       } else if (message instanceof GenericForgeLoginWrapperPacket<Context> packet
               && ForgeHandshakeUtils.ThirdPartyRegistryUtils.isThirdPartyPacket(packet)) {
-        server.getConnection().write(ForgeHandshakeUtils.ThirdPartyRegistryUtils.getThirdPartyChannel(packet));
+          server.getConnection().write(
+                  ForgeHandshakeUtils.ThirdPartyRegistryUtils.getThirdPartyChannel(packet).
+                          generateResponsePacket(
+                                  Context.ClientContext.fromContext(packet.getContext(), true),
+                                  clientPhase.forgeHandshake));
       }
     }
     //Forge server

src/main/java/org/adde0109/ambassador/forge/VelocityForgeClientConnectionPhase.java

@@ -17,6 +17,7 @@ import io.netty.buffer.Unpooled;
 import net.kyori.adventure.text.Component;
 import org.adde0109.ambassador.Ambassador;
 import org.adde0109.ambassador.forge.packet.Context;
+import org.adde0109.ambassador.forge.packet.GenericForgeLoginWrapperPacket;
 import org.adde0109.ambassador.forge.packet.IForgeLoginWrapperPacket;
 import org.adde0109.ambassador.forge.packet.ModListReplyPacket;
 import org.adde0109.ambassador.velocity.client.FML2CRPMResetCompleteDecoder;
@@ -129,6 +130,10 @@ public enum VelocityForgeClientConnectionPhase implements ClientConnectionPhase
 
   public boolean handle(ConnectedPlayer player, IForgeLoginWrapperPacket<Context.ClientContext> msg, VelocityServerConnection server) {
 
+    if (msg.getContext().getChannelName().equals("zeta:main")) {
+      forgeHandshake.zetaFlagsPacket = (GenericForgeLoginWrapperPacket<Context.ClientContext>) msg;
+    }
+
     if (msg instanceof ModListReplyPacket replyPacket) {
       ModInfo modInfo = new ModInfo("FML2", replyPacket.getMods().stream().map(
               (v) -> new ModInfo.Mod(v,"1")).toList());

src/main/java/org/adde0109/ambassador/forge/packet/GenericForgeLoginWrapperPacket.java

@@ -8,7 +8,7 @@ public class GenericForgeLoginWrapperPacket<T extends Context> implements IForge
   private final byte[] content;
   private final T context;
 
-  GenericForgeLoginWrapperPacket(byte[] content, T context) {
+  public GenericForgeLoginWrapperPacket(byte[] content, T context) {
     this.content = content;
     this.context = context;
   }