From eaa1b76227010bbf4b4a0ad1fdd5eee66ba9e754 Mon Sep 17 00:00:00 2001
From: "Martine S. Lenders" <m.lenders@fu-berlin.de>
Date: Thu, 17 Dec 2020 17:25:53 +0100
Subject: [PATCH] tests/emcute: add check for message ID with PUBLISH QoS 0

---
 tests/emcute/tests/01-run.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/emcute/tests/01-run.py b/tests/emcute/tests/01-run.py
index 4a61c8c881..9414162ed8 100755
--- a/tests/emcute/tests/01-run.py
+++ b/tests/emcute/tests/01-run.py
@@ -101,6 +101,11 @@ class MQTTSNServer(Automaton):
 
     def _check_pkt_qos(self, pkt):
         qos_types = [mqttsn.PUBLISH, mqttsn.SUBSCRIBE]
+        # see MQTT-SN 1.2 spec 5.4.12
+        if (pkt.type == mqttsn.PUBLISH) and \
+           (pkt.qos not in [mqttsn.QOS_1, mqttsn.QOS_2]) and \
+           (pkt.mid != 0):
+            return False
         return (pkt.type not in qos_types) or (pkt.qos == self._qos_flags)
 
     def _get_tid(self, topic_name):