From eb49731fa521b612de30f48181db2f276b3e5722 Mon Sep 17 00:00:00 2001
From: Connor Edwards <38229097+cedws@users.noreply.github.com>
Date: Thu, 14 Sep 2023 15:14:20 +0100
Subject: [PATCH] Fix sending bad ack frames

---
 iap/iap.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/iap/iap.go b/iap/iap.go
index 1acead8..97f8b45 100644
--- a/iap/iap.go
+++ b/iap/iap.go
@@ -215,8 +215,8 @@ func (c *Conn) Received() uint64 {
 func (c *Conn) writeAck(nb uint64) error {
 	buf := make([]byte, 10)
 
-	binary.LittleEndian.PutUint16(buf[0:2], subprotoTagAck)
-	binary.LittleEndian.PutUint64(buf[2:10], nb)
+	binary.BigEndian.PutUint16(buf[0:2], subprotoTagAck)
+	binary.BigEndian.PutUint64(buf[2:10], nb)
 
 	_, err := c.conn.Write(buf)
 	return err