🆙 Added some btter logging and fix pre-existing leak in GameByteDecoder

Emulator/src/main/java/com/eu/habbo/networking/gameserver/crypto/WsAesDecoder.java

@@ -39,7 +39,7 @@ public class WsAesDecoder extends MessageToMessageDecoder<ByteBuf> {
             byte[] plain = WsSessionCrypto.aesGcmDecrypt(key, nonce, ct);
             out.add(Unpooled.wrappedBuffer(plain));
         } catch (Exception e) {
-            LOGGER.warn("[ws-crypto] AES-GCM decrypt failed", e);
+            LOGGER.warn("[ws-crypto] AES-GCM decrypt failed ({}), closing channel", e.getClass().getSimpleName());
             ctx.close();
         }
     }

Emulator/src/main/java/com/eu/habbo/networking/gameserver/crypto/WsHandshakeHandler.java

@@ -3,6 +3,7 @@ package com.eu.habbo.networking.gameserver.crypto;
 import com.eu.habbo.Emulator;
 import com.eu.habbo.networking.gameserver.GameServerAttributes;
 import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelInboundHandlerAdapter;
 import io.netty.channel.ChannelPipeline;
@@ -118,7 +119,7 @@ public class WsHandshakeHandler extends ChannelInboundHandlerAdapter {
 
             LOGGER.debug("[ws-crypto] handshake complete for {}", clientAddress(ctx));
         } catch (Exception e) {
-            LOGGER.error("[ws-crypto] handshake failed from " + clientAddress(ctx), e);
+            LOGGER.warn("[ws-crypto] handshake failed from {} : {}", clientAddress(ctx), friendlyReason(e));
             ctx.close();
         } finally {
             in.release();
@@ -131,9 +132,21 @@ public class WsHandshakeHandler extends ChannelInboundHandlerAdapter {
         return String.valueOf(ctx.channel().remoteAddress());
     }
 
+    private static String friendlyReason(Throwable t) {
+        if (t == null) return "unknown";
+        String name = t.getClass().getSimpleName();
+        String msg = t.getMessage();
+        return (msg == null || msg.isEmpty()) ? name : name + ": " + msg;
+    }
+
     @Override
     public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
-        LOGGER.error("[ws-crypto] handshake handler error", cause);
+        if (cause instanceof java.io.IOException) {
+            LOGGER.debug("[ws-crypto] client disconnected during handshake ({}): {}",
+                    clientAddress(ctx), friendlyReason(cause));
+        } else {
+            LOGGER.error("[ws-crypto] handshake handler error from " + clientAddress(ctx), cause);
+        }
         ctx.close();
     }
 }

Emulator/src/main/java/com/eu/habbo/networking/gameserver/decoders/GameByteDecoder.java

@@ -2,7 +2,6 @@ package com.eu.habbo.networking.gameserver.decoders;
 
 import com.eu.habbo.messages.ClientMessage;
 import io.netty.buffer.ByteBuf;
-import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.ByteToMessageDecoder;
 
@@ -12,8 +11,7 @@ public class GameByteDecoder extends ByteToMessageDecoder {
     @Override
     protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) {
         short header = in.readShort();
-        ByteBuf body = Unpooled.copiedBuffer(in.readBytes(in.readableBytes()));
-
+        ByteBuf body = in.readBytes(in.readableBytes());
         out.add(new ClientMessage(header, body));
     }
 }