From 8f0f2b36c6b210e2e732cc99f85b5ffddc248f08 Mon Sep 17 00:00:00 2001
From: Collin Smith <collinsmith70@gmail.com>
Date: Mon, 22 Jun 2020 02:13:14 -0700
Subject: [PATCH] Fixed unsigned arithmetic

---
 server/netty/src/com/riiablo/net/reliable/Packet.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/netty/src/com/riiablo/net/reliable/Packet.java b/server/netty/src/com/riiablo/net/reliable/Packet.java
index 43aaa9e7..5e7e2f90 100644
--- a/server/netty/src/com/riiablo/net/reliable/Packet.java
+++ b/server/netty/src/com/riiablo/net/reliable/Packet.java
@@ -119,7 +119,7 @@ public abstract class Packet {
           return -1;
         }
         int sequenceDiff = bb.readUnsignedByte();
-        ack = (short) (sequence - sequenceDiff);
+        ack = (sequence - sequenceDiff) & 0xFFFF;
       } else {
         if (bb.readableBytes() < 2) {
           logError("buffer too small for packet header (3)");