Test and fix for client message prop persistence.

src/mosquitto.c

@@ -384,13 +384,13 @@ int main(int argc, char *argv[])
 		context__send_will(&int_db, ctxt);
 	}
 	will_delay__send_all(&int_db);
-	session_expiry__remove_all(&int_db);
 
 #ifdef WITH_PERSISTENCE
 	if(config.persistence){
 		persist__backup(&int_db, true);
 	}
 #endif
+	session_expiry__remove_all(&int_db);
 
 	HASH_ITER(hh_id, int_db.contexts_by_id, ctxt, ctxt_tmp){
 #ifdef WITH_WEBSOCKETS

test/broker/11-subscription-id.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+
+# Test whether a client message maintains its subscription id when persisted and restored.
+
+from mosq_test_helper import *
+
+def write_config(filename, port):
+    with open(filename, 'w') as f:
+        f.write("port %d\n" % (port))
+        f.write("persistence true\n")
+        f.write("persistence_file mosquitto-%d.db\n" % (port))
+
+port = mosq_test.get_port()
+conf_file = os.path.basename(__file__).replace('.py', '.conf')
+write_config(conf_file, port)
+
+rc = 1
+keepalive = 60
+
+props = mqtt5_props.gen_uint32_prop(mqtt5_props.PROP_SESSION_EXPIRY_INTERVAL, 100)
+connect_packet = mosq_test.gen_connect(
+    "persistent-subscription-test", keepalive=keepalive, clean_session=False, proto_ver=5, properties=props
+)
+connack_packet = mosq_test.gen_connack(rc=0, proto_ver=5)
+connack_packet2 = mosq_test.gen_connack(rc=0, flags=1, proto_ver=5)  # session present
+
+mid = 1
+props = mqtt5_props.gen_varint_prop(mqtt5_props.PROP_SUBSCRIPTION_IDENTIFIER, 53)
+subscribe_packet = mosq_test.gen_subscribe(mid, "subpub/qos1", 1, proto_ver=5, properties=props)
+suback_packet = mosq_test.gen_suback(mid, 1, proto_ver=5)
+
+mid = 1
+props = mqtt5_props.gen_varint_prop(mqtt5_props.PROP_SUBSCRIPTION_IDENTIFIER, 53)
+publish_packet2 = mosq_test.gen_publish("subpub/qos1", qos=1, mid=mid, payload="message", proto_ver=5, properties=props)
+
+
+helper_connect_packet = mosq_test.gen_connect("helper", keepalive=keepalive, clean_session=True, proto_ver=5)
+helper_connack_packet = mosq_test.gen_connack(rc=0, proto_ver=5)
+
+mid = 1
+helper_publish_packet = mosq_test.gen_publish("subpub/qos1", qos=1, mid=mid, payload="message", proto_ver=5)
+helper_puback_packet = mosq_test.gen_puback(mid, proto_ver=5)
+
+
+if os.path.exists('mosquitto-%d.db' % (port)):
+    os.unlink('mosquitto-%d.db' % (port))
+
+broker = mosq_test.start_broker(filename=os.path.basename(__file__), use_conf=True, port=port)
+
+(stdo1, stde1) = ("", "")
+try:
+    sock = mosq_test.do_client_connect(connect_packet, connack_packet, timeout=20, port=port)
+    mosq_test.do_send_receive(sock, subscribe_packet, suback_packet, "suback")
+    sock.close()
+
+    sock = mosq_test.do_client_connect(helper_connect_packet, helper_connack_packet, timeout=20, port=port)
+    mosq_test.do_send_receive(sock, helper_publish_packet, helper_puback_packet, "helper puback")
+    sock.close()
+
+    broker.terminate()
+    broker.wait()
+    (stdo1, stde1) = broker.communicate()
+    broker = mosq_test.start_broker(filename=os.path.basename(__file__), use_conf=True, port=port)
+
+    sock = mosq_test.do_client_connect(connect_packet, connack_packet2, timeout=20, port=port)
+
+    if mosq_test.expect_packet(sock, "publish2", publish_packet2):
+        rc = 0
+
+    sock.close()
+finally:
+    os.remove(conf_file)
+    broker.terminate()
+    broker.wait()
+    (stdo, stde) = broker.communicate()
+    if rc:
+        print(stde1 + stde)
+    if os.path.exists('mosquitto-%d.db' % (port)):
+        os.unlink('mosquitto-%d.db' % (port))
+        pass
+
+
+exit(rc)
+

test/broker/Makefile

@@ -182,6 +182,7 @@ endif
 	./11-persistent-subscription-v5.py
 	./11-persistent-subscription-no-local.py
 	./11-pub-props.py
+	./11-subscription-id.py
 
 12 :
 	./12-prop-assigned-client-identifier.py

test/broker/test.py

@@ -150,6 +150,7 @@ tests = [
     (1, './11-persistent-subscription-v5.py'),
     (1, './11-persistent-subscription-no-local.py'),
     (1, './11-pub-props.py'),
+    (1, './11-subscription-id.py'),
 
     (1, './12-prop-assigned-client-identifier.py'),
     (1, './12-prop-maximum-packet-size-broker.py'),