It doesn't run on top of UDP in the conventional sense but practically and for the purposes of this discussion, yes it does. Thanks for your help - just what I needed.
Robert On 9 June 2016 at 08:54, Guy Harris <[email protected]> wrote: > On Jun 8, 2016, at 11:10 PM, Robert Cragie <[email protected]> > wrote: > > > It's basically an 802.15.4 MAC frame plus an additional byte at the > beginning placed into the payload of a UDP datagram. > > So the answer to my question is "it runs atop UDP". > > So: > > if there's a standard UDP port number atop which it runs, you > should... > > > The only thing the CoAP dissector does in addition is to add a port > using dissector_add_uint() > > ...register it in the "udp.port" dissector with that port number; > > if there *is* no standard UDP port number atop which it runs, you > should register it in the "udp.port" dissector with a call to > dissector_add_for_decode_as().
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