https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6430
--- Comment #6 from Bill Meier <wmeier@xxxxxxxxxxx> 2011-10-05 12:42:28 EDT ---
(In reply to comment #5)
>
> To be clear on your comments, in order for a change similar to this
> to be accepted, I need to submit changes for BRP and the other protocol that
> uses this UDP port and make them both heuristic?
>
(Jumping into this conversation and hopefully not confusing the issue).
Unless I'm missing something, there doesn't appear to be any actual Wireshark
dissector registered on UDP port 1958.
However I do see that this port is officially assigned by IANA[1] as follows:
dxadmind 1958 tcp CA Administration Daemon [John_Birrell]
dxadmind 1958 udp CA Administration Daemon [John_Birrell]
This may be what Anders was referencing when he said "registered to a different
protocol" in [2] although I'm not sure.
[1]http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml
[2]https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6428#c7
As Jaap indicated, this can be handled by adding a heuristic registration to
your dissector.
Another way (as Anders suggested): Add a port preference [which is by default 0
and thus the dissector is (by default) not registered].
See epan/dissectors/packet-lsc.c for a fairly simple example.
IMHO: Using a port preference would be acceptable.
P.S.: Note that I recently committed some minor changes to the BRP dissector
source.
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