From 11739370c49dfbe14572ec92b905720f62672df3 Mon Sep 17 00:00:00 2001
From: Joel Wetzell <git@jwetzell.com>
Date: Sat, 30 May 2026 07:18:23 -0500
Subject: [PATCH] fix endianness

---
 command.go     |  8 ++++----
 datarequest.go | 12 ++++++------
 diagdata.go    |  4 ++--
 nzs.go         |  4 ++--
 4 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/command.go b/command.go
index e952e8b..22785fd 100644
--- a/command.go
+++ b/command.go
@@ -55,9 +55,9 @@ func (ac *ArtCommand) UnmarshalBinary(data []byte) error {
 	ac.ProtVerLo = data[11]
 
 	offset := 12
-	ac.EstaMan = binary.LittleEndian.Uint16(data[offset : offset+2])
+	ac.EstaMan = binary.BigEndian.Uint16(data[offset : offset+2])
 
-	dataLength := int(binary.LittleEndian.Uint16(data[offset+2 : offset+4]))
+	dataLength := int(binary.BigEndian.Uint16(data[offset+2 : offset+4]))
 
 	if len(data[offset+4:]) < dataLength {
 		return errors.New("[]byte length not long enough to contain data length specified in packet")
@@ -73,12 +73,12 @@ func (ac *ArtCommand) MarshalBinary() ([]byte, error) {
 	binary.LittleEndian.PutUint16(data[8:10], ac.OpCode)
 	data[10] = ac.ProtVerHi
 	data[11] = ac.ProtVerLo
-	binary.LittleEndian.PutUint16(data[12:14], ac.EstaMan)
+	binary.BigEndian.PutUint16(data[12:14], ac.EstaMan)
 	dataLength := uint16(len(ac.Data))
 	if dataLength > 512 {
 		return nil, errors.New("data length must be less than or equal to 512 bytes")
 	}
-	binary.LittleEndian.PutUint16(data[14:16], dataLength)
+	binary.BigEndian.PutUint16(data[14:16], dataLength)
 	data = append(data, ac.Data...)
 	return data, nil
 }
diff --git a/datarequest.go b/datarequest.go
index 163e23b..56edef2 100644
--- a/datarequest.go
+++ b/datarequest.go
@@ -57,9 +57,9 @@ func (adr *ArtDataRequest) UnmarshalBinary(data []byte) error {
 	adr.ProtVerLo = data[11]
 
 	offset := 12
-	adr.EstaMan = binary.LittleEndian.Uint16(data[offset : offset+2])
-	adr.Oem = binary.LittleEndian.Uint16(data[offset+2 : offset+4])
-	adr.Request = binary.LittleEndian.Uint16(data[offset+4 : offset+6])
+	adr.EstaMan = binary.BigEndian.Uint16(data[offset : offset+2])
+	adr.Oem = binary.BigEndian.Uint16(data[offset+2 : offset+4])
+	adr.Request = binary.BigEndian.Uint16(data[offset+4 : offset+6])
 	copy(adr.spare[:], data[offset+6:offset+28])
 	return nil
 }
@@ -70,9 +70,9 @@ func (adr *ArtDataRequest) MarshalBinary() ([]byte, error) {
 	binary.LittleEndian.PutUint16(data[8:10], adr.OpCode)
 	data[10] = adr.ProtVerHi
 	data[11] = adr.ProtVerLo
-	binary.LittleEndian.PutUint16(data[12:14], adr.EstaMan)
-	binary.LittleEndian.PutUint16(data[14:16], adr.Oem)
-	binary.LittleEndian.PutUint16(data[16:18], adr.Request)
+	binary.BigEndian.PutUint16(data[12:14], adr.EstaMan)
+	binary.BigEndian.PutUint16(data[14:16], adr.Oem)
+	binary.BigEndian.PutUint16(data[16:18], adr.Request)
 	copy(data[18:40], adr.spare[:])
 	return data, nil
 }
diff --git a/diagdata.go b/diagdata.go
index a522e34..fe882fc 100644
--- a/diagdata.go
+++ b/diagdata.go
@@ -65,7 +65,7 @@ func (add *ArtDiagData) UnmarshalBinary(data []byte) error {
 	add.DiagPriority = DiagPriority(data[offset+1])
 	add.LogicalPort = data[offset+2]
 	add.filler3 = data[offset+3]
-	dataLength := binary.LittleEndian.Uint16(data[offset+4 : offset+6])
+	dataLength := binary.BigEndian.Uint16(data[offset+4 : offset+6])
 
 	if len(data[offset+6:]) < int(dataLength) {
 		return errors.New("[]byte length not long enough to contain data length specified in packet")
@@ -89,7 +89,7 @@ func (add *ArtDiagData) MarshalBinary() ([]byte, error) {
 	if dataLength > 512 {
 		return nil, errors.New("data length must be less than or equal to 512 bytes")
 	}
-	binary.LittleEndian.PutUint16(data[16:18], dataLength)
+	binary.BigEndian.PutUint16(data[16:18], dataLength)
 	data = append(data, add.Data...)
 	return data, nil
 }
diff --git a/nzs.go b/nzs.go
index d5439f7..e6262b4 100644
--- a/nzs.go
+++ b/nzs.go
@@ -56,7 +56,7 @@ func (an *ArtNzs) UnmarshalBinary(data []byte) error {
 	an.SubUni = data[offset+2]
 	an.Net = data[offset+3]
 
-	dataLength := int(binary.LittleEndian.Uint16(data[offset+4 : offset+6]))
+	dataLength := int(binary.BigEndian.Uint16(data[offset+4 : offset+6]))
 
 	if len(data[offset+6:]) < dataLength {
 		return errors.New("[]byte length not long enough to contain data length specified in packet")
@@ -80,7 +80,7 @@ func (an *ArtNzs) MarshalBinary() ([]byte, error) {
 	if dataLength > 512 {
 		return nil, errors.New("data length must be less than or equal to 512 bytes")
 	}
-	binary.LittleEndian.PutUint16(data[16:18], dataLength)
+	binary.BigEndian.PutUint16(data[16:18], dataLength)
 	copy(data[18:], an.Data)
 	return data, nil
 }