Require topics to be present in subscribe packet

MQTT-3.8.3-3

Require topics to be present in subscribe packet
MQTT-3.8.3-3
Wiebe Cazemier
1 parent 86fb73e0
Showing 1 changed file with 6 additions and 0 deletions
mqttpacket.cpp
@@ -468,6 +468,12 @@ void MqttPacket::handleSubscribe()
         }
     }
  
+    // MQTT-3.8.3-3
+    if (subs_reponse_codes.empty())
+    {
+        throw ProtocolError("No topics specified to subscribe to.");
+    }
+
     SubAck subAck(packet_id, subs_reponse_codes);
     MqttPacket response(subAck);
     sender->writeMqttPacket(response);