From a82964bd66ad9eeec2613887e8c1262831defde2 Mon Sep 17 00:00:00 2001
From: Michael Zillgith <michael.zillgith@mz-automation.de>
Date: Wed, 16 Feb 2022 23:12:05 +0100
Subject: [PATCH] - fixed - TPKT error when connection is interrupted during
 message reception (LIB61850-299)

---
 src/mms/iso_cotp/cotp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mms/iso_cotp/cotp.c b/src/mms/iso_cotp/cotp.c
index 68ce1c1f..efd852e5 100644
--- a/src/mms/iso_cotp/cotp.c
+++ b/src/mms/iso_cotp/cotp.c
@@ -763,10 +763,12 @@ CotpConnection_readToTpktBuffer(CotpConnection* self)
 
 exit_closed:
     if (DEBUG_COTP) printf("TPKT: socket closed or socket error\n");
+    self->readBuffer->size = 0;
     return TPKT_ERROR;
 
 exit_error:
     if (DEBUG_COTP) printf("TPKT: Error parsing message\n");
+    self->readBuffer->size = 0;
     return TPKT_ERROR;
 
 exit_waiting: