From 9092dda950d65020b245c172897e92c47fb9d807 Mon Sep 17 00:00:00 2001
From: neckfire <nfteamhead@proton.me>
Date: Tue, 14 Jul 2026 19:08:52 +0200
Subject: [PATCH] diag(game-server): log packet sequence mismatch
 (post-handshake)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 src/Prospect.Unreal/Net/Packets/Header/FNetPacketNotify.cs | 5 ++++-
 src/Prospect.Unreal/Net/UNetConnection.cs                  | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Prospect.Unreal/Net/Packets/Header/FNetPacketNotify.cs b/src/Prospect.Unreal/Net/Packets/Header/FNetPacketNotify.cs
index 530094d..6e66789 100644
--- a/src/Prospect.Unreal/Net/Packets/Header/FNetPacketNotify.cs
+++ b/src/Prospect.Unreal/Net/Packets/Header/FNetPacketNotify.cs
@@ -129,19 +129,22 @@ public class FNetPacketNotify
     {
         if (!notificationData.Seq.Greater(_inSeq))
         {
+            Logger.Information("[HS-SEQ] fail1 seq<=inSeq seq={Seq} inSeq={InSeq}", notificationData.Seq.Value, _inSeq.Value);
             return 0;
         }
 
         if (!notificationData.AckedSeq.GreaterEq(_outAckSeq))
         {
+            Logger.Information("[HS-SEQ] fail2 ackedSeq<outAckSeq ackedSeq={Acked} outAckSeq={OutAck}", notificationData.AckedSeq.Value, _outAckSeq.Value);
             return 0;
         }
 
         if (!_outSeq.Greater(notificationData.AckedSeq))
         {
+            Logger.Information("[HS-SEQ] fail3 outSeq<=ackedSeq outSeq={OutSeq} ackedSeq={Acked}", _outSeq.Value, notificationData.AckedSeq.Value);
             return 0;
         }
-        
+
         return SequenceNumber.Diff(notificationData.Seq, _inSeq);
     }
 
diff --git a/src/Prospect.Unreal/Net/UNetConnection.cs b/src/Prospect.Unreal/Net/UNetConnection.cs
index 9f60333..358070a 100644
--- a/src/Prospect.Unreal/Net/UNetConnection.cs
+++ b/src/Prospect.Unreal/Net/UNetConnection.cs
@@ -1079,6 +1079,7 @@ public abstract class UNetConnection : UPlayer
 
     public void InitSequence(int incomingSequence, int outgoingSequence)
     {
+        Logger.Information("[HS-SEQ] InitSequence incoming={In} outgoing={Out}", incomingSequence, outgoingSequence);
         if (InPacketId == -1)
         {
             // Initialize the base UNetConnection packet sequence (not very useful/effective at preventing attacks)