From 30ab8dd6436fddf44e70d54f0904bc812a9b3c06 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <info@lategoodbye.de>
Date: Thu, 4 Oct 2012 23:20:28 +0200
Subject: [PATCH] handle direction of ACK correctly

---
 mbus/mbus-protocol.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/mbus/mbus-protocol.c b/mbus/mbus-protocol.c
index dee306e..e47f8d2 100755
--- a/mbus/mbus-protocol.c
+++ b/mbus/mbus-protocol.c
@@ -308,7 +308,14 @@ mbus_frame_direction(mbus_frame *frame)
 {
     if (frame)
     {
-        return (frame->control & MBUS_CONTROL_MASK_DIR);
+        if (frame->type == MBUS_FRAME_TYPE_ACK)
+        {
+            return MBUS_CONTROL_MASK_DIR_S2M;    
+        }
+        else
+        {
+            return (frame->control & MBUS_CONTROL_MASK_DIR);
+        }
     }
     return -1;
 }