From 722e7bbaf7be36d10ca5ed04de36c37485393eeb Mon Sep 17 00:00:00 2001
From: Steffen Conrad <76872233+sc-automation@users.noreply.github.com>
Date: Mon, 31 May 2021 14:08:40 +0200
Subject: [PATCH] Fix length error on abort user message.

BER length of abort payload must exclude, not include tag and length.
---
 src/mms/iso_presentation/iso_presentation.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mms/iso_presentation/iso_presentation.c b/src/mms/iso_presentation/iso_presentation.c
index ca0e7ee1..3d7c514d 100644
--- a/src/mms/iso_presentation/iso_presentation.c
+++ b/src/mms/iso_presentation/iso_presentation.c
@@ -789,7 +789,7 @@ IsoPresentation_createAbortUserMessage(IsoPresentation* self, BufferChain writeB
 
     contentLength = +encodeUserData(NULL, 0, payload, false, self->acseContextId);
 
-    contentLength += BerEncoder_determineLengthSize(contentLength) + 1;
+    contentLength += BerEncoder_determineLengthSize(contentLength) - 1;
 
     uint8_t* buffer = writeBuffer->buffer;
     int bufPos = 0;