The "reference" MQTT C client, which includes source code, is available once again as a "SupportPac" called IA93. This enables application programs written in C to connect to RSMB, Micro broker or any other MQTT server.
You can get it here: http://www-01.ibm.com/support/docview.wss?rs=171&uid=swg24006525&loc=en_US&cs=utf-8&lang=en
