[mosquitto-dev] MQTT client id length

[Terry Tong <terry.tong@xxxxxxxxxxx>]

According to MQTT V3.1 Protocol Specification, "The Client Identifier 
(Client ID) is between 1 and 23 characters long, and uniquely identifies 
the client to the server. It must be unique across all clients 
connecting to a single server, and is the key in handling Message IDs 
messages with QoS levels 1 and 2. If the Client ID contains more than 23 
characters, the server responds to the CONNECT message with a CONNACK 
return code 2: Identifier Rejected."

But I have noticed that Mosquitto is OK with client identifiers longer 
than 23 characters.  What is mosquitto's maximum client id length?


Regards,
Terry